$188+ Cheap flights from Washington to London, ON (YXU)
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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YXU
Aug 5 — Aug 121
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Washington to London
Keep the following information in mind while searching for Washington to London flight deals. Data was last updated July 31, 2025.
Round-trip from | $345 (oojo) |
|---|---|
One-way from | $188 (Kiwi.com) |
Find flight deals from Washington to London
Cheapest flights from Washington to LondonExplore the most affordable flight options available from Washington to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.
Explore the most affordable flight options available from Washington to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.
This oojo deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/261:15 pmSEA - YXU
2 stops12h 57mWestJet
Tue 9/306:00 amYXU - SEA
1 stop9h 59mWestJet
Deal found 7/30![WestJet logo]()
$363
This Gotogate deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/147:15 amSEA - YXU
2 stops11h 14mAir Canada
Sun 9/216:10 amYXU - SEA
1 stop7h 49mAir Canada
Deal found 7/31![Air Canada logo]()
$411
This Mytrip deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/145:30 amSEA - YXU
3 stops20h 42mMultiple Airlines
Sun 9/216:10 amYXU - SEA
2 stops15h 26mMultiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$453
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2011:59 pmSEA - YXU
2 stops14h 07mUnited Airlines
Sat 1/35:45 amYXU - SEA
2 stops20h 02mUnited Airlines
Deal found 7/30![United Airlines logo]()
$905
Cheapflights Fare Finder
Customize your flight search to find flights from Washington to London 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 2,558,603 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from Washington to London that are best for you.
Fly from
Washington
Fly to
London
Route
Depart
Return
Price
SeattleLondon
SEA - YXU
SEAYXU
Seattle/Tacoma Intl
Mon 8/25
7:35 pm-5:14 am
1 stop6h 39m
London
Fri 8/29
8:00 pm-6:55 pm
1 stop25h 55m
$345
SeattleLondon
SEA - YXU
SEAYXU
Seattle/Tacoma Intl
Sun 9/14
7:15 am-9:29 pm
2 stops11h 14m
London
Sun 9/21
6:10 am-10:59 am
1 stop7h 49m
$411
SeattleLondon
SEA - YXU
SEAYXU
Seattle/Tacoma Intl
Sun 9/14
5:30 am-5:12 am
3 stops20h 42m
London
Sun 9/21
6:10 am-6:36 pm
2 stops15h 26m
$453
SeattleLondon
SEA - YXU
SEAYXU
Seattle/Tacoma Intl
Tue 8/26
11:54 pm-3:02 pm
2 stops12h 08m
London
Tue 9/2
6:15 am-10:59 am
1 stop7h 44m
$490
SeattleLondon
SEA - YXU
SEAYXU
Seattle/Tacoma Intl
Mon 10/6
7:05 am-7:07 pm
1 stop9h 02m
$188
SeattleLondon
SEA - YXU
SEAYXU
Seattle/Tacoma Intl
Mon 10/6
7:15 pm-9:17 am
2 stops11h 02m
$232
SeattleLondon
SEA - YXU
SEAYXU
Seattle/Tacoma Intl
Mon 10/6
5:00 am-9:27 pm
3 stops13h 27m
$1,630
Best time to book a flight from Washington to London
Have a flexible travel schedule? Discover the best time to fly to London from Washington with our price prediction graph.
Estimated round-trip 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 Washington to London
No data available for this route at this time. Please check back soon.
Reviews of airlines servicing London
Get insights into the airlines that provide service to London. 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 London. Reviews last updated July 31, 2025.
Read reviews from past customers who have flown United Airlines, WestJet, and Air Canada from Washington to London. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.3
Overall
7.4
Boarding
7.7
Food
6.6
Crew
8.1
Entertainment
7.1
Reviews
1 / 20
4.0
OkayThomas,Mar 2025
SFO - TPE
Comfort
7.3
Overall
7.4
Boarding
7.7
Food
6.6
Crew
8.1
Entertainment
7.1
Reviews
1 / 20
4.0
OkayThomas,Mar 2025
SFO - TPE
Comfort
7.3
Overall
7.4
Boarding
7.7
Food
6.6
Crew
8.1
Entertainment
7.1
Reviews
1 / 20
4.0
OkayThomas,Mar 2025
SFO - TPE
Comfort
7.3
Overall
7.4
Boarding
7.7
Food
6.6
Crew
8.1
Entertainment
7.1
Reviews
1 / 20
4.0
OkayThomas,Mar 2025
SFO - TPE
Related info for your journey
Find useful and relevant information for your journey from Washington to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near London?
Book flights to London if you plan to visit one of these locationsGrand Bend
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Alternative routes for Washington to London
See prices for flight routes from nearby airports that may be better suited for you.
Top 2 airlines flying from Washington to London
Discover the top 2 airlines that operate flights from Washington to London. 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 2,558,603 searches. Data last updated July 31, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$185 | Average$660 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$244 | Average$671 | FlexibilityNo cancel fee | On-time67% |