Cheap flights from London Heathrow Airport to Washington from £377
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 20/8. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Heathrow to Washington
Keep the following information in mind while searching for Heathrow to Washington flight deals. Data was last updated 8 July 2025.
Round-trip from | £473 |
---|---|
One-way from | £377 |
Popular in | August |
Cheapest in | January |
Average price | £721 |
Good round-trip deal | £528 or less |
Good one-way deal | £709 or less |
Find flight deals from Heathrow to Washington
Cheapest flights from Heathrow to WashingtonExplore the most affordable flight options available from Heathrow to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 July 2025.
Explore the most affordable flight options available from Heathrow to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from Heathrow to Washington 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 8 July 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Washington that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Wed 10/9
08:40-19:31
2 stops18h 51m
Seattle/Tacoma Intl
Mon 15/9
10:00-11:50
2 stops17h 50m
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Wed 3/9
08:40-20:54
2 stops20h 14m
Seattle/Tacoma Intl
Thu 11/9
15:19-21:45
2 stops22h 26m
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Sun 24/8
21:25-11:25
1 stop22h 00m
Seattle/Tacoma Intl
Tue 2/9
23:30-20:20
1 stop12h 50m
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Tue 9/9
19:15-16:05
1 stop28h 50m
Seattle/Tacoma Intl
Tue 23/9
20:25-14:15
Nonstop9h 50m
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Thu 4/9
21:05-13:50
2 stops24h 45m
Seattle/Tacoma Intl
Mon 8/9
16:00-18:30
1 stop18h 30m
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Tue 9/9
06:30-18:36
2 stops20h 06m
Seattle/Tacoma Intl
Thu 2/10
10:00-11:50
2 stops17h 50m
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Mon 11/8
09:30-16:00
1 stop14h 30m
Seattle/Tacoma Intl
Thu 21/8
17:40-15:10
1 stop13h 30m
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Wed 24/9
06:30-14:16
2 stops15h 46m
Seattle/Tacoma Intl
Sat 1/11
20:00-11:50
1 stop32h 50m
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Wed 27/8
08:15-19:58
1 stop19h 43m
Seattle/Tacoma Intl
Mon 15/9
23:40-20:45
1 stop13h 05m
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Tue 26/8
09:30-20:41
1 stop19h 11m
Seattle/Tacoma Intl
Tue 9/9
07:15-06:30
1 stop15h 15m
Best time to book a flight from Heathrow to Washington
Have a flexible travel schedule? Discover the best time to fly to Washington from Heathrow with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from London Heathrow Airport to Washington
What is the cheapest month to book a flight from London Heathrow Airport to State of Washington?
Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to State of Washington (average of £622). Flying from London Heathrow Airport to State of Washington 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 LHR to WA?
Find hourly flight availability from Heathrow to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 8 July 2025.
When flying from London Heathrow Airport to State of Washington, 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 London Heathrow Airport to State of Washington
Explore weekly flight availability from Heathrow to Washington. 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 8 July 2025.
The most flights from LHR to USWA are scheduled on a Monday (22 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (16 on average).
How much does it cost for a return flight from London Heathrow Airport to State of Washington?
Reviews of airlines servicing Washington
Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated 8 July 2025.
Get a feel of what it's like to fly with Delta, Alaska Airlines, andAustrian Airlines from London Heathrow Airport to Washington by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
Entertainment
Overall
Boarding
Food
Crew
Reviews
Kim,May 2025
PIH - SLC
Comfort
Entertainment
Overall
Boarding
Food
Crew
Reviews
Kim,May 2025
PIH - SLC
Comfort
Entertainment
Overall
Boarding
Food
Crew
Reviews
Kim,May 2025
PIH - SLC
Comfort
Entertainment
Overall
Boarding
Food
Crew
Reviews
Kim,May 2025
PIH - SLC
Comfort
Entertainment
Overall
Boarding
Food
Crew
Reviews
Kim,May 2025
PIH - SLC
Comfort
Entertainment
Overall
Boarding
Food
Crew
Reviews
Kim,May 2025
PIH - SLC
Related info for your journey
Find useful and relevant information for your journey from Heathrow to Washington. 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 Heathrow to Washington
See prices for flight routes from nearby airports that may be better suited for you.
Top 10 airlines flying from Heathrow to Washington
Discover the top 10 airlines that operate flights from Heathrow to Washington. 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 8 July 2025.
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