Finnair flights from London Heathrow Airport to Washington, D.C. (LHR - WAS)
LHR — WAS
21 Oct — 28 Oct1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
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Cheapest Finnair flights from Heathrow to Washington, D.C.
Explore the most affordable Finnair flight options available from Heathrow to Washington, D.C.. Find the lowest fares with prices last updated on 21 September 2026.
Tue 6/1015:00 -
1 stop13h 59m
Sat 10/1017:54 -
1 stop22h 46m
Deal found 18/9£450
Thu 22/1012:15 -
1 stop12h 44m
Sun 1/1117:00 -
1 stop12h 25m
Deal found 19/9£451
Fri 23/1016:25 -
1 stop30h 58m
Sun 1/1121:45 -
Nonstop7h 15m
Deal found 16/9£454
Best Finnair flights from Heathrow to Washington, D.C.
Discover carefully curated Finnair flight deals from Heathrow to Washington, D.C. that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 September 2026.
Tue 6/1015:00 -
1 stop13h 59m
Sat 10/1017:54 -
1 stop22h 46m
Deal found 18/9£450
Mon 12/1014:25 -
1 stop23h 36m
Mon 19/1016:55 -
1 stop10h 05m
Deal found 19/9£456
Mon 23/1115:00 -
2 stops46h 59m
Sat 28/1120:05 -
1 stop32h 35m
Deal found 17/9£459
Direct Finnair flights from Heathrow to Washington, D.C.
Explore direct Finnair flight options from Heathrow to Washington, D.C. based on user searches, and compare prices and availability for your desired travel dates. Data last updated 21 September 2026.
Fri 4/1212:15 -
Nonstop8h 25m
Fri 11/1218:05 -
Nonstop7h 10m
Deal found 19/9£439
Mon 16/1112:15 -
Nonstop8h 25m
Sun 22/1118:05 -
Nonstop7h 10m
Deal found 20/9£447
Tue 3/1113:50 -
Nonstop8h 15m
Tue 10/1118:55 -
Nonstop7h 10m
Deal found 18/9£487
Last-minute Finnair flights from Heathrow to Washington, D.C.
Discover last-minute Finnair flight deals from Heathrow to Washington, D.C.. Data last updated 21 September 2026 and is based on user searches.
Tue 6/1015:00 -
1 stop13h 59m
Sat 10/1017:54 -
1 stop22h 46m
Deal found 18/9£450
Thu 22/1012:15 -
1 stop12h 44m
Sun 1/1117:00 -
1 stop12h 25m
Deal found 19/9£451
Fri 23/1016:25 -
1 stop30h 58m
Sun 1/1121:45 -
Nonstop7h 15m
Deal found 16/9£454
One-way Finnair flights to Washington, D.C.
Search for one-way Finnair flight options to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated 21 September 2026.
Tue 24/1113:50 -
Nonstop8h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 20/9£359
Sat 7/1113:50 -
Nonstop8h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 18/9£362
Tue 19/111:55 -
2 stops33h 25m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 17/9£365
Can I get a flight from London Heathrow Airport to Washington, D.C. on Finnair for under £523?
Finnair offers 10 flights from London Heathrow Airport to Washington, D.C. for under £523. Prices vary by date and time. To see all prices and select your dates, click here.
Finnair flights from Heathrow to Washington, D.C. in 2026
Find detailed information about Finnair flights from Heathrow to Washington, D.C.. Explore the options provided by Finnair to plan your journey from Heathrow to Washington, D.C.. Data last updated 21 September 2026.
Which month is the cheapest to fly Economy class from London Heathrow Airport to Washington, D.C.?
For Economy class flights, the cheapest month to fly this route is May. The most expensive months are January and August.
Weekly Finnair flight availability from London Heathrow Airport to Washington, D.C.
The most Finnair flights from LHR to WAS are scheduled on a Monday (2 on average). You will have fewer Finnair flight options on Monday, which is when the least amount of flights are scheduled (2 on average).
Rainfall in Washington, D.C. by month
Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Washington, D.C. ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. when rainfall is around 66.0 mm.
Temperature in Washington, D.C. by month
Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Washington, D.C., 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).
Best time to book a flight from Heathrow to Washington, D.C.
Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Heathrow with our price prediction graph.
LHR-WAS
LHR-DCA
LHR-IAD
LHR-BWI
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.
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Fly from Heathrow to Washington, D.C. on another airline
Consider alternative airlines that service the Washington, D.C. area. Flight routes are based on user searches made on Cheapflights and were last updated on 21 September 2026.
Browse through other Finnair flights departing from Heathrow. Flight routes are based on user searches made on Cheapflights and were last updated on 21 September 2026.
If Washington, D.C. is not for you, choose from these other destinations located in North America. Flight routes are based on user searches made on Cheapflights and were last updated on 21 September 2026.
Browse through some of the most popular routes that Finnair offers at this time. Flights are based on user searches made on Cheapflights and were last updated on 21 September 2026.
Read reviews and see what other travellers are saying about their experiences with Finnair. Get insights from real passengers regarding the airline's services, customer satisfaction, and overall travel experience. Use these reviews to inform your decision when choosing Finnair for your next flight. Reviews last updated 21 September 2026.
The flight from Helsinki to Toronto was very cramped. No leg space and no room to even walk. Very bad experience
8.0
Very Good|Jul 2026
Very limited food provided. Limited drinks, lights out for 10 of 12.30 flights. Very few staff.
2.0
Poor|Jun 2026
Lost our luggage and took two days to get it back. Ruined the trip.
10.0
Wonderful|Jun 2026
Our checked baggage was not transferred correctly so now we are stuck in Budapest with out essential luggage. We are not able to get much help from FinnAir because their service from Seattle is on periodic.
10.0
Wonderful|May 2026
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