Finnair flights from London to Washington, D.C. (LON - WAS)
LON — WAS
31 Oct — 7 Nov1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
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Cheapest Finnair flights from London to Washington, D.C.
Explore the most affordable Finnair flight options available from London to Washington, D.C.. Find the lowest fares with prices last updated on 1 October 2026.
Thu 22/1012:15 -
1 stop14h 45m
Fri 30/1008:20 -
1 stop21h 00m
Deal found 30/9£451
Thu 29/1012:35 -
1 stop15h 24m
Tue 3/1117:12 -
1 stop23h 58m
Deal found 29/9£480
Wed 28/1016:45 -
2 stops35h 14m
Tue 3/1117:12 -
1 stop32h 08m
Deal found 29/9£482
Best Finnair flights from London to Washington, D.C.
Discover carefully curated Finnair flight deals from London to Washington, D.C. that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 1 October 2026.
Thu 21/116:25 -
Nonstop8h 30m
Tue 9/218:05 -
Nonstop7h 10m
Deal found 30/9£445
Thu 22/1012:15 -
1 stop14h 45m
Fri 30/1008:20 -
1 stop21h 00m
Deal found 30/9£451
Fri 23/1014:45 -
1 stop24h 21m
Fri 30/1011:59 -
1 stop17h 21m
Deal found 26/9£452
Direct Finnair flights from London to Washington, D.C.
Explore direct Finnair flight options from London to Washington, D.C. based on user searches, and compare prices and availability for your desired travel dates. Data last updated 1 October 2026.
Fri 11/1212:15 -
Nonstop8h 25m
Mon 14/1218:05 -
Nonstop7h 10m
Deal found 29/9£430
Thu 12/1116:25 -
Nonstop8h 30m
Wed 25/1121:55 -
Nonstop7h 15m
Deal found 30/9£440
Thu 21/116:25 -
Nonstop8h 30m
Tue 9/218:05 -
Nonstop7h 10m
Deal found 30/9£445
Last-minute Finnair flights from London to Washington, D.C.
Discover last-minute Finnair flight deals from London to Washington, D.C.. Data last updated 1 October 2026 and is based on user searches.
Thu 22/1012:15 -
1 stop14h 45m
Fri 30/1008:20 -
1 stop21h 00m
Deal found 30/9£451
Thu 29/1012:35 -
1 stop15h 24m
Tue 3/1117:12 -
1 stop23h 58m
Deal found 29/9£480
Wed 28/1016:45 -
2 stops35h 14m
Tue 3/1117:12 -
1 stop32h 08m
Deal found 29/9£482
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 1 October 2026.
Tue 12/113:50 -
Nonstop8h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 26/9£359
Tue 26/112:15 -
Nonstop8h 25m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 28/9£365
Sun 24/116:25 -
Nonstop8h 30m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 26/9£367
Does Finnair service alternative airports for LON-WAS?
If you’re flying LON-WAS on Finnair and are looking for alternative airports to fly into or out of, you are in luck. Instead of landing at Washington, D.C. Dulles Intl, there are routes available with Finnair that will take you to Baltimore/Washington. If you are looking for a closer or different airport to depart from in London, Finnair also flies out of London Gatwick when traveling to Washington, D.C..
Can I get a flight from London to Washington, D.C. on Finnair for under £528?
London to Washington, D.C. flights on Finnair are currently available under £528. 17 flights have been found by Cheapflights users under that amount. To find flights for your dates, click here.
Finnair flights from London to Washington, D.C. in 2026
Find detailed information about Finnair flights from London to Washington, D.C.. Explore the options provided by Finnair to plan your journey from London to Washington, D.C.. Data last updated 1 October 2026.
Which month is the cheapest to fly Economy class from London to Washington, D.C.?
For Economy class flights, the cheapest month to fly this route is May. The most expensive months are February and August.
Weekly Finnair flight availability from London to Washington, D.C.
The most Finnair flights from LON to WAS are scheduled on a Wednesday (3 on average). You will have fewer Finnair flight options on Saturday, which is when the least amount of flights are scheduled (1 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 London to Washington, D.C.
Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from London with our price prediction graph.
LON-WAS
LHR-BWI
LHR-IAD
LHR-DCA
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 London 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 1 October 2026.
Browse through other Finnair flights departing from London. Flight routes are based on user searches made on Cheapflights and were last updated on 1 October 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 1 October 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 1 October 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 1 October 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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