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Finnair flights from London Heathrow Airport to Washington, D.C. (LHR - WAS)

LHR — WAS
23 juil. — 30 juil.1
1 adult

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 Heathrow to Washington, D.C. in 2025

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 18 juillet 2025.

One-way from

£433

Return from

£467

Popular in

August

Cheapest in

February

Average price (all airlines)

£714
Finnair
  • Finnair
  • 11/9
  • 2 total stops
  • 17h 47m total
  • London to Washington, D.C.
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Finnair
  • Finnair
  • 31/8-9/9
  • 3 total stops
  • 35h 15m total
  • London to Washington, D.C.
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Highest demand for flights from London Heathrow to Washington, D.C.; 11% potential price increase.
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Best time to find cheap flights from London Heathrow to Washington, D.C.; 2% potential price drop.
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Average price for all London Heathrow to Washington, D.C. flights (one-way and round-trip).
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  • Can I get a flight from London Heathrow Airport to Washington, D.C. on Finnair for under £1,000?

    Finnair offers 3 flights from London Heathrow Airport to Washington, D.C. for under £1,000. Prices vary by date and time. To see all prices and select your dates, click here.

  • How do most travelers feel about Finnair?

    When planning your LHR-WAS trip, keep in mind that Finnair is typically rated 8.0/10. This rating comes from 7,958 reviews by Cheapflights users who have traveled with Finnair.

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

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 18 juillet 2025.

dim. 31/809:45LHR - DCA
1 stop18h 33mFinnair
mar. 9/919:23DCA - LHR
2 stops16h 42mFinnair
Deal found 17/7£467
dim. 31/819:05LHR - IAD
2 stops22h 32mFinnair
mer. 10/914:21IAD - LHR
1 stop12h 19mFinnair
Deal found 15/7£511
mer. 6/809:15LHR - BWI
1 stop18h 54mFinnair
mer. 13/818:54BWI - LHR
1 stop12h 36mFinnair
Deal found 16/7£563

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

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

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

Currently, the most affordable month to book a Finnair flight from London Heathrow Airport to Washington, D.C. in April, with an average price of £421. Conversely, traveling with Finnair from London Heathrow Airport to Washington, D.C. in August will be the most expensive, with an average cost of £612. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.

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.
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

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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 18 juillet 2025.
Virgin Atlantic flights from London Heathrow to Washington, D.C.
British Airways flights from London Heathrow to Washington, D.C.

See what others are saying about Finnair

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 18 juillet 2025.
Finnair
7.6
Good
1,316 reviews
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Overview

Entertainment

6.9

Food

6.7

Comfort

7.5

Boarding

7.6

Crew

8.1

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