This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/8. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
22 Jul — 29 Jul1
Return
1 adult
Economy
Cheapflights Tip: The best prices from London to Seattle/Tacoma Intl are usually found in January or March, booked 44 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday
Cheap flight deals from London to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 17 July 2025.
Round-trip from | £483 |
|---|---|
One-way from | £404 |
Popular in | August |
Cheapest in | January |
Average price | £709 |
Good round-trip deal | £552 or less |
Good one-way deal | £669 or less |
- Finnair
- 3/9-17/9
- 3 total stops
- 50h 02m total
- London to Seattle
- 24/8
- 3 total stops
- 41h 18m total
- London to Seattle
Highest demand for flights based on searches. 14% potential increase in price (£68 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Average for round-trip flights in July 2025
Price to beat on a round-trip flight from London (LON) to Seattle/Tacoma Intl.
Price to beat on a one-way flight from London (LON) to Seattle/Tacoma Intl.
Find flight deals from London to Seattle
Cheapest flights from London to SeattleExplore the most affordable flight options available from London to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 July 2025.
Explore the most affordable flight options available from London to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 July 2025.
Wed 3/919:05LHR - SEA
2 stops33h 04mFinnair
Wed 17/906:42SEA - LHR
1 stop16h 58mFinnair
Deal found 17/7£483
Sat 30/814:00LGW - SEA
2 stops40h 29mMultiple Airlines
Sat 6/908:00SEA - LGW
1 stop18h 50mMultiple Airlines
Deal found 16/7£484
Sat 30/806:00LHR - SEA
1 stop16h 50mMultiple Airlines
Sat 6/912:00SEA - LHR
1 stop15h 50mMultiple Airlines
Deal found 15/7£484
Mon 11/815:40LGW - SEA
1 stop13h 00mIcelandair
Fri 22/819:00SEA - LGW
1 stop32h 45mIcelandair
Deal found 16/7£485
Sat 16/821:25LHR - SEA
1 stop22h 00mIcelandair
Wed 3/915:45SEA - LHR
1 stop12h 10mIcelandair
Deal found 14/7£485
Mon 1/915:05LHR - SEA
2 stops37h 37mAustrian Airlines
Mon 15/907:00SEA - LHR
2 stops18h 40mAustrian Airlines
Deal found 15/7£486
Sat 30/814:05LHR - SEA
1 stop14h 40mUnited Airlines
Sat 6/908:45SEA - LHR
1 stop16h 55mUnited Airlines
Deal found 15/7£488
Tue 2/906:30LHR - SEA
1 stop13h 25mLufthansa
Mon 15/907:00SEA - LHR
1 stop15h 20mLufthansa
Deal found 15/7£489
Wed 10/909:25LCY - SEA
2 stops17h 11mSWISS
Mon 15/916:25SEA - LCY
1 stop18h 20mSWISS
Deal found 16/7£490
Wed 10/909:50LHR - SEA
Nonstop9h 45mBritish Airways
Mon 15/920:20SEA - LHR
Nonstop9h 20mBritish Airways
Deal found 17/7£490
Tue 21/1022:35STN - SEA
3 stops46h 24mMultiple Airlines
Tue 28/1015:35SEA - STN
2 stops22h 50mMultiple Airlines
Deal found 15/7£492
Sat 30/806:00LHR - SEA
1 stop16h 50mSWISS
Sat 6/916:20SEA - LHR
1 stop35h 05mSWISS
Deal found 16/7£492
Best flights from London to SeattleDiscover carefully curated flight deals from London to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 July 2025.
Discover carefully curated flight deals from London to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 July 2025.
Wed 3/919:05LHR - SEA
2 stops33h 04mFinnair
Wed 17/906:42SEA - LHR
1 stop16h 58mFinnair
Deal found 17/7£483
Sat 30/814:00LGW - SEA
2 stops40h 29mMultiple Airlines
Sat 6/908:00SEA - LGW
1 stop18h 50mMultiple Airlines
Deal found 16/7£484
Mon 11/815:40LGW - SEA
1 stop13h 00mIcelandair
Fri 22/819:00SEA - LGW
1 stop32h 45mIcelandair
Deal found 16/7£485
Mon 1/915:05LHR - SEA
2 stops37h 37mAustrian Airlines
Mon 15/907:00SEA - LHR
2 stops18h 40mAustrian Airlines
Deal found 15/7£486
Sat 30/814:05LHR - SEA
1 stop14h 40mUnited Airlines
Sat 6/908:45SEA - LHR
1 stop16h 55mUnited Airlines
Deal found 15/7£488
Mon 1/909:30LHR - SEA
2 stops36h 46mAir Canada
Mon 15/910:00SEA - LHR
2 stops15h 35mAir Canada
Deal found 17/7£489
Wed 10/909:25LCY - SEA
2 stops17h 11mSWISS
Mon 15/916:25SEA - LCY
1 stop18h 20mSWISS
Deal found 16/7£490
Wed 10/909:50LHR - SEA
Nonstop9h 45mBritish Airways
Mon 15/920:20SEA - LHR
Nonstop9h 20mBritish Airways
Deal found 17/7£490
Mon 1/920:55LHR - SEA
1 stop27h 10mVirgin Atlantic
Mon 15/917:35SEA - LHR
Nonstop9h 45mVirgin Atlantic
Deal found 15/7£492
Mon 18/815:05LGW - SEA
2 stops25h 14mAmerican Airlines
Mon 25/805:25SEA - LGW
2 stops18h 45mAmerican Airlines
Deal found 17/7£495
Mon 25/806:30LHR - SEA
1 stop13h 05mDelta
Wed 10/920:25SEA - LHR
Nonstop9h 50mDelta
Deal found 15/7£500
Thu 11/908:45LCY - SEA
2 stops21h 35mLufthansa
Wed 17/908:00SEA - LCY
2 stops24h 25mLufthansa
Deal found 16/7£506
Direct flights from London to SeattleExplore direct flight options from London to Seattle based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 July 2025.
Explore direct flight options from London to Seattle based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 July 2025.
Wed 10/916:30LHR - SEA
Nonstop9h 50mBritish Airways
Tue 23/913:30SEA - LHR
Nonstop9h 20mBritish Airways
Deal found 16/7£484
Wed 8/1013:25LHR - SEA
Nonstop10h 05mVirgin Atlantic
Wed 15/1020:25SEA - LHR
Nonstop9h 50mVirgin Atlantic
Deal found 15/7£485
Mon 22/917:25LHR - SEA
Nonstop10h 25mDelta
Thu 9/1020:25SEA - LHR
Nonstop9h 50mDelta
Deal found 15/7£509
Last-minute flights from London to SeattleDiscover last-minute flight deals from London to Seattle. Data last updated 17 July 2025 and is based on user searches.
Discover last-minute flight deals from London to Seattle. Data last updated 17 July 2025 and is based on user searches.
Tue 22/706:40LHR - SEA
2 stops23h 36mScandinavian Airlines
Mon 8/916:00SEA - LHR
2 stops43h 55mScandinavian Airlines
Deal found 17/7£617
Tue 22/709:25LHR - SEA
Nonstop9h 45mFinnair
Tue 19/813:30SEA - LHR
Nonstop9h 20mFinnair
Deal found 16/7£678
Tue 22/721:20LHR - SEA
2 stops26h 40mBritish Airways
Tue 19/813:30SEA - LHR
Nonstop9h 20mBritish Airways
Deal found 16/7£687
Wed 23/709:30LHR - SEA
1 stop14h 30mAmerican Airlines
Tue 5/807:49SEA - LHR
1 stop14h 36mAmerican Airlines
Deal found 16/7£662
Wed 23/712:00LGW - SEA
1 stop18h 48mVirgin Atlantic
Tue 5/807:40SEA - LGW
2 stops18h 20mVirgin Atlantic
Deal found 16/7£701
Thu 24/710:15LHR - SEA
2 stops20h 01mAir Canada
Tue 29/714:55SEA - LHR
1 stop14h 25mAir Canada
Deal found 17/7£692
Thu 24/714:10LHR - SEA
1 stop17h 49mLufthansa
Tue 29/714:55SEA - LHR
1 stop14h 25mLufthansa
Deal found 17/7£706
Thu 24/712:05LGW - SEA
2 stops42h 43mITA Airways
Thu 7/807:15SEA - LGW
2 stops44h 00mITA Airways
Deal found 16/7£724
Fri 25/715:40LGW - SEA
1 stop13h 00mIcelandair
Thu 7/819:00SEA - LGW
1 stop32h 45mIcelandair
Deal found 15/7£706
Sun 27/709:30LHR - SEA
1 stop19h 11mUnited Airlines
Sun 10/823:45SEA - LHR
1 stop22h 35mUnited Airlines
Deal found 15/7£689
Sun 27/714:45LHR - SEA
1 stop28h 30mVirgin Atlantic
Thu 7/817:35SEA - LHR
Nonstop9h 45mVirgin Atlantic
Deal found 16/7£700
Sun 27/717:35LHR - SEA
1 stop25h 40mDelta
Wed 24/920:25SEA - LHR
Nonstop9h 50mDelta
Deal found 17/7£707
One-way flights from London to SeattleSearch for one-way flight options from London to Seattle. Find affordable one-way fares based on user searches. Data last updated 17 July 2025.
Search for one-way flight options from London to Seattle. Find affordable one-way fares based on user searches. Data last updated 17 July 2025.
Sun 24/807:40LGW - SEA
3 stops41h 18mMultiple Airlines
Deal found 15/7£404
Wed 13/816:50SEN - SEA
3 stops31h 10mMultiple Airlines
Deal found 15/7£406
Tue 7/1009:50LHR - SEA
1 stop16h 00mAer Lingus
Deal found 17/7£406
Sun 7/909:55LHR - SEA
3 stops36h 55mMultiple Airlines
Deal found 16/7£411
Tue 7/1007:50STN - SEA
3 stops20h 50mMultiple Airlines
Deal found 17/7£421
Wed 3/908:30LCY - SEA
2 stops19h 59mMultiple Airlines
Deal found 17/7£422
Sun 7/909:55LTN - SEA
3 stops20h 21mMultiple Airlines
Deal found 16/7£422
Wed 27/810:45LGW - SEA
2 stops34h 13mWestJet
Deal found 16/7£443
Sat 4/1015:40LGW - SEA
1 stop13h 00mIcelandair
Deal found 17/7£452
Wed 8/1009:25LCY - SEA
2 stops17h 11mSWISS
Deal found 16/7£503
Tue 7/1019:10LCY - SEA
1 stop24h 45mLufthansa
Deal found 17/7£524
Cheapflights Fare Finder
Customise your flight search to find flights from London to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 17 July 2025.
Use the filters below to find and compare flights from London to Seattle that are best for you.
Fly from
London
Fly to
Seattle
Route
Depart
Return
Price
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Wed 3/9
19:05-20:09
2 stops33h 04m
Seattle/Tacoma Intl
Wed 17/9
06:42-07:40
1 stop16h 58m
£483
LondonSeattle
LGW - SEA
LGWSEA
London Gatwick
Sat 30/8
14:00-22:29
2 stops40h 29m
Seattle/Tacoma Intl
Sat 6/9
08:00-10:50
1 stop18h 50m
£484
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Sat 30/8
06:00-14:50
1 stop16h 50m
Seattle/Tacoma Intl
Sat 6/9
12:00-11:50
1 stop15h 50m
£484
LondonSeattle
LGW - SEA
LGWSEA
London Gatwick
Mon 11/8
15:40-20:40
1 stop13h 00m
Seattle/Tacoma Intl
Fri 22/8
19:00-11:45
1 stop32h 45m
£485
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Mon 18/8
21:25-11:25
1 stop22h 00m
Seattle/Tacoma Intl
Mon 25/8
23:30-11:55
1 stop28h 25m
£485
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Fri 29/8
06:40-13:50
2 stops39h 10m
Seattle/Tacoma Intl
Sun 7/9
16:00-17:00
2 stops41h 00m
£488
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Mon 1/9
09:30-14:16
2 stops36h 46m
Seattle/Tacoma Intl
Mon 15/9
10:00-09:35
2 stops15h 35m
£489
LondonSeattle
LCY - SEA
LCYSEA
London City
Wed 10/9
09:25-18:36
2 stops17h 11m
Seattle/Tacoma Intl
Mon 15/9
16:25-18:45
1 stop18h 20m
£490
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Mon 5/1
13:25-22:59
2 stops17h 34m
Seattle/Tacoma Intl
Sat 17/1
09:20-07:25
1 stop14h 05m
£491
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Sat 30/8
06:00-14:50
1 stop16h 50m
Seattle/Tacoma Intl
Sat 6/9
16:20-11:25
1 stop35h 05m
£492
Flights are sorted by cheapest return flights first.
Deals found on 15/7
Showing 1-10 of 43 results
1
2
3
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5
Best time to book a flight from London to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from London with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from London to Seattle
How far ahead should I book a flight from London to Seattle?
Use this chart to determine the optimal time to book a return flight from London to Seattle. Price data was last updated on 11 July 2025.
Booking 44 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from London to Seattle?
Currently, January is the cheapest month in which you can book a flight from London to Seattle (average of £622). Flying from London to Seattle in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from LON to SEA?
Find hourly flight availability from London to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 July 2025.
Unlike in the morning, when flights are generally more expensive, you can save up to 18% on flights from London to Seattle by exploring options for tickets in the evening.
What is the cheapest day to fly from London to Seattle?
Use this chart to determine the cheapest time to fly return from London to Seattle. Price data was last updated on 16 December 2024.
Travellers seeking maximum savings on their London to Seattle flight should consider departing on Monday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from London to Seattle
Explore weekly flight availability from London to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 17 July 2025.
The most flights from LON to SEA are scheduled on a Monday (22 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (11 on average).
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 17 July 2025.
Read reviews from past customers who have flown with Delta, KLM, andAustrian Airlinesfrom London to Seattle. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
7,959 reviews
Boarding
8.2
Comfort
7.9
Food
7.3
Overall
8.0
Crew
8.5
Entertainment
7.9
Reviews
1 / 20
8.0
Michael,Jul 2025
AMS - ATL
Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
7,959 reviews
Delta
8.0
7,959 reviews
Boarding
8.2
Comfort
7.9
Food
7.3
Overall
8.0
Crew
8.5
Entertainment
7.9
Reviews
1 / 20
8.0
Michael,Jul 2025
AMS - ATL
Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
1,374 reviews
Delta
8.0
7,959 reviews
Boarding
8.2
Comfort
7.9
Food
7.3
Overall
8.0
Crew
8.5
Entertainment
7.9
Reviews
1 / 20
8.0
Michael,Jul 2025
AMS - ATL
Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Austrian Airlines
7.6
814 reviews
Delta
8.0
7,959 reviews
Boarding
8.2
Comfort
7.9
Food
7.3
Overall
8.0
Crew
8.5
Entertainment
7.9
Reviews
1 / 20
8.0
Michael,Jul 2025
AMS - ATL
Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Finnair
7.6
1,316 reviews
Delta
8.0
7,959 reviews
Boarding
8.2
Comfort
7.9
Food
7.3
Overall
8.0
Crew
8.5
Entertainment
7.9
Reviews
1 / 20
8.0
Michael,Jul 2025
AMS - ATL
Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
SWISS
7.5
1,661 reviews
Delta
8.0
7,959 reviews
Boarding
8.2
Comfort
7.9
Food
7.3
Overall
8.0
Crew
8.5
Entertainment
7.9
Reviews
1 / 20
8.0
Michael,Jul 2025
AMS - ATL
Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Related info for your journey
Find useful and relevant information for your journey from London to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
What airport do you fly into for flights to Seattle from London?
Located just 11.4 mi from the city center, Seattle/Tacoma Intl is the airport most travelers will use when flying to Seattle from London. Booking flights from London to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 18 daily inbound flights from London from 13 different airlines.
What are the cheapest airlines flying from London to Seattle round-trip?
Finnair, at £483, was found to be the cheapest airline from London to Seattle.Alternate airlines flying return to your destination include Icelandair and Austrian Airlines. Finnair is priced at 13% lower than the current average price of a flight leaving 3 months from now.
Find Finnair London to Seattle flightsWhat are the cheapest airlines to fly from London to Seattle one-way?
£406 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on WestJet and Icelandair, with prices starting from £443 and £452, respectively.
What are the most popular routes from London to Seattle?
When deciding which route to take from London to Seattle consider London Heathrow - Seattle/Tacoma Intl, London Gatwick - Seattle/Tacoma Intl or London City - Seattle/Tacoma Intl as they are the most popular.
What are the most reliable airlines from London to Seattle?
Consider Scandinavian Airlines (97%), KLM (94%) or Air France (94%) when booking your flight. These represent the most reliable airlines when flying from London to Seattle.
What are the cheapest flights from London to Seattle?
On average you can expect to pay £2,523 for a flight from London to Seattle. The cheapest flight overall is £481 while the most popular route, (London Heathrow - Seattle/Tacoma Intl) is currently priced at £403.
Find cheap London to Seattle flightsCan I find deals for flights from London to Seattle that include hotel bookings?
Yes. In addition to deals on London to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from London to Seattle?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Seattle.
Find cheap London to Seattle flightsCan I find deals for business class flights from London to Seattle?
Yes. Cheapflights offers flight deals from London to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
Find business class London to Seattle flightsWhat is the cheapest month to book a flight from London to Seattle?
Currently, January is the cheapest month in which you can book a flight from London to Seattle (average of £622). Flying from London to Seattle in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Find London to Seattle flights departing January
See more FAQs
Travelling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell
SeaTac
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Fly from London to Seattle on these airlines
Choose from the following airlines for your flight from London to Seattle. Flights are based on user searches made on Cheapflights and were last updated on 17 July 2025.
Virgin Atlantic flights from London to Seattle/Tacoma Intl
British Airways flights from London to Seattle/Tacoma Intl
Finnair flights from London to Seattle/Tacoma Intl
Alternative routes for London to Seattle
See prices for flight routes from nearby airports that may be better suited for you.
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Complete your trip
Complete your trip to Seattle by adding a car hire and/or hotel booking to your travel itinerary.
Seattle car hire
Seattle/Tacoma Intl Airport car hire
Kenmore Air Harbor Airport car hire
Bellingham car hire
Downtown car hire
Capitol Hill car hire
West Seattle car hire
University District car hire
Ballard car hire
Queen Anne car hire
Belltown car hire
Fremont car hire
Direct flights to Washington
Book a non-stop flight to one of these other cities located in Washington.
Direct flights to Seattle
Search flights from London to Seattle by cabin class
Find flights from London to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
London and Seattle flights
Browse other London and Seattle flight options. Last updated on 17 July 2025.
Flights from Seattle to London
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Flights from London
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Other flights from London
Browse through other flights departing from London. Flights are based on user searches made on Cheapflights and were last updated on 17 July 2025.
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Other flights to Seattle
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Top 10 airlines flying from London to Seattle
Discover the top 10 airlines that operate flights from London to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 17 July 2025.
| Airline | Cheapest | Average | Flexibility | On-time | |
|---|---|---|---|---|---|
| Aer Lingus | Cheapest£8 | Average£664 | FlexibilityNo cancel fee | On-timeN/A | Search Aer Lingus flights |
| Icelandair | Cheapest£326 | Average£503 | FlexibilityNo cancel fee | On-time76% | Search Icelandair flights |
| Air France | Cheapest£386 | Average£571 | FlexibilityNo cancel fee | On-time77% | Search Air France flights |
| Lufthansa | Cheapest£386 | Average£489 | FlexibilityNo cancel fee | On-time76% | Search Lufthansa flights |
| United Airlines | Cheapest£393 | Average£500 | FlexibilityNo cancel fee | On-time69% | Search United Airlines flights |
| Finnair | Cheapest£404 | Average£556 | FlexibilityNo cancel fee | On-time76% | Search Finnair flights |
| KLM | Cheapest£406 | Average£576 | FlexibilityNo cancel fee | On-time75% | Search KLM flights |
| British Airways | Cheapest£425 | Average£584 | FlexibilityNo cancel fee | On-time70% | Search British Airways flights |
| Virgin Atlantic | Cheapest£444 | Average£562 | FlexibilityNo cancel fee | On-time72% | Search Virgin Atlantic flights |
| Delta | Cheapest£445 | Average£599 | FlexibilityNo cancel fee | On-timeN/A | Search Delta flights |
Fly with Cheapflights
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from London to Seattle?
Cheapflights makes it easy to find London to Seattle flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.
Why should you use Cheapflights to find cheap flight tickets from London to Seattle?
Millions of users choose and trust Cheapflights to book the best flight deals from London to Seattle for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.
Can Cheapflights find flights from London to Seattle with no change fees?
Certainly. Search results for flights to Seattle from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from London to Seattle become cheaper?
Yes, Cheapflights offers price alerts on London to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.
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