$253+ Cheap flights from Washington to London (LON)
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 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Washington to London with Cheapflights
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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 June 12, 2025.
Round-trip from | $665 (Gotogate) |
|---|---|
One-way from | $253 (Trip.com) |
Popular in | June |
Cheapest in | January |
Average price | $1,028 |
Good round-trip deal | $665 or less |
Good one-way deal | $445 or less |
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 June 12, 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 June 12, 2025.
This Gotogate deal was found by Cheapflights users on 6/10. 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.
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Icelandair deal was found by Cheapflights users on 6/10. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This SWISS deal was found by Cheapflights users on 6/10. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This SWISS deal was found by Cheapflights users on 6/10. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Ovago deal was found by Cheapflights users on 6/10. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 6/11. 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.
This Finnair deal was found by Cheapflights users on 6/10. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This SWISS deal was found by Cheapflights users on 6/11. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 6/9. 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.
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Air France deal was found by Cheapflights users on 6/9. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
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 June 12, 2025.
Use the filters below to find and compare flights from Washington to London that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
SeattleLondon
SEA - LGW
SEALGW
Seattle/Tacoma Intl
Thu 9/4
11:30 pm-2:40 pm
1 stop31h 10m
London Gatwick
Fri 9/19
3:40 pm-8:40 pm
1 stop13h 00m
SeattleLondon
SEA - LHR
SEALHR
Seattle/Tacoma Intl
Mon 10/6
5:10 pm-3:40 pm
1 stop14h 30m
London Heathrow
Tue 10/21
5:25 pm-7:50 pm
Nonstop10h 25m
SeattleLondon
SEA - LGW
SEALGW
Seattle/Tacoma Intl
Wed 8/20
10:55 am-5:55 pm
2 stops23h 00m
London Gatwick
Tue 9/23
6:35 pm-6:36 pm
2 stops32h 01m
SeattleLondon
SEA - LHR
SEALHR
Seattle/Tacoma Intl
Wed 8/27
10:00 am-4:25 pm
2 stops22h 25m
London Heathrow
Wed 9/10
5:10 pm-6:36 pm
2 stops33h 26m
SeattleLondon
SEA - LGW
SEALGW
Seattle/Tacoma Intl
Sun 7/27
7:49 am-10:40 am
2 stops18h 51m
London Gatwick
Thu 8/28
10:40 am-11:40 pm
2 stops21h 00m
SeattleLondon
SEA - LHR
SEALHR
Seattle/Tacoma Intl
Mon 8/18
7:34 pm-8:40 pm
2 stops17h 06m
London Heathrow
Thu 8/28
7:30 am-5:57 pm
2 stops18h 27m
SeattleLondon
SEA - LHR
SEALHR
Seattle/Tacoma Intl
Sun 7/27
8:20 pm-1:40 pm
Nonstop9h 20m
London Heathrow
Mon 8/11
7:30 am-4:00 pm
1 stop16h 30m
SeattleLondon
SEA - LCY
SEALCY
Seattle/Tacoma Intl
Tue 9/16
2:29 pm-5:30 pm
2 stops19h 01m
London City
Tue 10/7
7:20 pm-6:36 pm
2 stops31h 16m
SeattleLondon
SEA - STN
SEASTN
Seattle/Tacoma Intl
Wed 8/13
3:45 pm-10:30 pm
2 stops22h 45m
London Stansted
Wed 8/20
9:05 am-5:50 pm
2 stops16h 45m
SeattleLondon
SEA - LGW
SEALGW
Seattle/Tacoma Intl
Fri 9/19
7:00 pm-2:40 pm
1 stop11h 40m
London Gatwick
Thu 9/25
10:00 am-10:05 pm
1 stop20h 05m
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.
Cheapflights Insights
Everything you need to know about your flight from Washington to London
What is the cheapest month to book a flight from State of Washington to London?
Currently, November is the cheapest month in which you can book a flight from State of Washington to London (average of $661). Flying from State of Washington to London in June is currently the most expensive (average of $1,108). 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 WA to LON?
Find hourly flight availability from Washington to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.
When flying from State of Washington to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Weekly flight availability from State of Washington to London
Explore weekly flight availability from Washington to London. 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 June 12, 2025.
The most flights from USWA to LON are scheduled on a Monday (22 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).
Rainfall in London by month
Plan your trip to London by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.
Temperature in London by month
Plan your trip to London by taking into account the average temperature totals by month.
If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).
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 June 12, 2025.
Peruse reviews from past customers who have flown with Delta, Alaska Airlines and KLM from Washington to London to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
Boarding
Crew
Entertainment
Comfort
Overall
Reviews
Kim,May 2025
PIH - SLC
Food
Boarding
Crew
Entertainment
Comfort
Overall
Reviews
Kim,May 2025
PIH - SLC
Food
Boarding
Crew
Entertainment
Comfort
Overall
Reviews
Kim,May 2025
PIH - SLC
Food
Boarding
Crew
Entertainment
Comfort
Overall
Reviews
Kim,May 2025
PIH - SLC
Food
Boarding
Crew
Entertainment
Comfort
Overall
Reviews
Kim,May 2025
PIH - SLC
Food
Boarding
Crew
Entertainment
Comfort
Overall
Reviews
Kim,May 2025
PIH - SLC
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.
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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 10 airlines flying from Washington to London
Discover the top 10 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 June 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$378 | Average$819 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$503 | Average$660 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$532 | Average$871 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$550 | Average$874 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$579 | Average$734 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$583 | Average$794 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$597 | Average$728 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$597 | Average$876 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$597 | Average$813 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$611 | Average$856 | FlexibilityNo cancel fee | On-time70% |