How do most travelers feel about Finnair?

7,980 Cheapflights users have left reviews for Finnair and have rated the airline 8.0/10. If you are looking to travel from London to Washington, D.C. on Finnair, input your dates in the form above for our best prices!

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 £900?

London to Washington, D.C. flights on Finnair are currently available under £900. 37 flights have been found by Cheapflights users under that amount. To find flights for your dates, click here.

£455+ Finnair Flights from London to Washington, D.C.

Cheapflights users flying from London to Washington, D.C. on Finnair typically fly into Washington, D.C. Dulles Intl and depart from London Heathrow. Select your dates above for pricing.

Finnair flights from London to Washington, D.C. in 2025

One-way from	£455
Return from	£457
Popular in	July
Cheapest in	February
Average price (all airlines)	£604

Finnair
24/9
2 total stops
17h 47m total
London to Washington, D.C.

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Finnair
2/10-9/10
3 total stops
28h 46m total
London to Washington, D.C.

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Highest demand for flights from London to Washington, D.C.; 11% potential price increase.

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Best time to find cheap flights from London to Washington, D.C.; 2% potential price drop.

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Average price for all London to Washington, D.C. flights (one-way and round-trip).

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Can I get a flight from London to Washington, D.C. on Finnair for under £900?
London to Washington, D.C. flights on Finnair are currently available under £900. 37 flights have been found by Cheapflights users under that amount. To find flights for your dates, click here.
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..
How do most travelers feel about Finnair?
7,980 Cheapflights users have left reviews for Finnair and have rated the airline 8.0/10. If you are looking to travel from London to Washington, D.C. on Finnair, input your dates in the form above for our best prices!

Find Finnair flight deals from London to Washington, D.C.

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 14 August 2025.

Mon 25/819:05LHR - IAD

2 stops25h 14mFinnair

Tue 9/914:21IAD - LHR

1 stop12h 19mFinnair

Deal found 12/8£475

Tue 26/819:05LHR - IAD

2 stops25h 14mFinnair

Wed 10/914:21IAD - LHR

1 stop13h 44mFinnair

Deal found 11/8£476

Mon 25/815:00LHR - DCA

1 stop12h 37mFinnair

Tue 9/915:35DCA - LHR

1 stop9h 45mFinnair

Deal found 13/8£477

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 14 August 2025.

Thu 2/1010:20LHR - DCA

2 stops17h 47mFinnair

Thu 9/1019:06DCA - LHR

1 stop10h 59mFinnair

Deal found 13/8£457

Wed 5/1119:40LHR - IAD

2 stops28h 41mFinnair

Wed 12/1117:29IAD - LHR

2 stops12h 46mFinnair

Deal found 12/8£470

Mon 25/819:05LHR - IAD

2 stops25h 14mFinnair

Tue 9/914:21IAD - LHR

1 stop12h 19mFinnair

Deal found 12/8£475

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 14 August 2025.

Thu 18/912:45LHR - IAD

Nonstop8h 15mFinnair

Wed 24/922:40IAD - LHR

Nonstop7h 25mFinnair

Deal found 12/8£531

Mon 15/916:35LHR - BWI

Nonstop8h 10mFinnair

Mon 22/921:35BWI - LHR

Nonstop7h 15mFinnair

Deal found 13/8£536

Sat 1/1112:10LHR - IAD

Nonstop8h 25mFinnair

Sun 2/1118:20IAD - LHR

Nonstop7h 10mFinnair

Deal found 14/8£541

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 14 August 2025 and is based on user searches.

Wed 20/815:00LHR - BWI

1 stop13h 09mFinnair

Wed 8/1011:11BWI - LHR

2 stops14h 09mFinnair

Deal found 12/8£489

Fri 22/815:00LHR - IAD

1 stop12h 56mFinnair

Wed 3/914:21IAD - LHR

1 stop13h 44mFinnair

Deal found 12/8£534

Tue 19/811:00LHR - DCA

1 stop13h 24mFinnair

Tue 2/915:25DCA - LHR

1 stop11h 15mFinnair

Deal found 12/8£534

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 14 August 2025.

Wed 24/910:20LHR - DCA

2 stops17h 47mFinnair

Deal found 13/8£455

Wed 1/1015:05LGW - DCA

1 stop13h 02mFinnair

Deal found 13/8£460

Wed 1/1010:20LHR - DCA

2 stops17h 47mFinnair

Deal found 13/8£460

Travel insights for Finnair flights from London to Washington, D.C.

Get recent, data-driven insights about Finnair flights from London to Washington, D.C. including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from London to Washington, D.C. with Finnair?

Currently, the most affordable month to book a Finnair flight from London to Washington, D.C. in April, with an average price of £402. Conversely, traveling with Finnair from London to Washington, D.C. in August will be the most expensive, with an average cost of £567. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.

Rainfall in Washington, D.C. 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

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.

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.

Browse thousands of different options on Cheapflights for your next trip

See what others are saying about Finnair

Finnair

7.6

Good

1,321 reviews

Check prices

Overview

Recent reviews

8.0

Very Good|Jul 2025

It was okay

2.0

Poor|Jun 2025

They stranded us in the airport

10.0

Wonderful|May 2025

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

10.0

Wonderful|May 2025

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.

6.0

Okay|May 2025

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(

1 out of 441

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Finnair flights from London to Washington, D.C. (LON - WAS)

Cheapflights users flying from London to Washington, D.C. on Finnair typically fly into Washington, D.C. Dulles Intl and depart from London Heathrow. Select your dates above for pricing.

Finnair flights from London to Washington, D.C. in 2025

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 14 August 2025.

One-way from

Return from

Popular in

Cheapest in

Average price (all airlines)

Can I get a flight from London to Washington, D.C. on Finnair for under £900?

Does Finnair service alternative airports for LON-WAS?

How do most travelers feel about Finnair?

Find Finnair flight deals from London to Washington, D.C.

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 14 August 2025.

Explore the most affordable Finnair flight options available from London to Washington, D.C.. Find the lowest fares with prices last updated on 14 August 2025.

Travel insights for Finnair flights from London to Washington, D.C.

Get recent, data-driven insights about Finnair flights from London to Washington, D.C. including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from London to Washington, D.C. with Finnair?

Rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.

Temperature in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.

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.

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 14 August 2025.

See what others are saying about Finnair

Overview

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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 14 August 2025.