Flights
Insights
FAQs

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

LHR — WAS
26 Apr — 3 May1
1 adult
1 adult, Economy, 0 bags

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 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 27 March 2026.

One-way from

£480

Return from

£474

Popular in

July

Cheapest in

January

Average price (all airlines)

£516
Finnair
  • Finnair
  • 23/9
  • Nonstop
  • 8h 15m total
  • London to Washington, D.C.
Search Deals
Finnair
  • Finnair
  • 1/5-9/5
  • 3 total stops
  • 42h 59m total
  • London to Washington, D.C.
Search Deals
Highest demand for flights from London Heathrow to Washington, D.C.; 12% potential price increase.
Search Deals
Best time to find cheap flights from London Heathrow to Washington, D.C.; 2% potential price drop.
Search Deals
Average price for all London Heathrow to Washington, D.C. flights (one-way and round-trip).
Search Deals

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

Enter your travel dates to find the best prices.

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 27 March 2026.

Thu 16/410:20
LHR
-
DCA
2 stops17h 09m
Finnair
Mon 27/419:50
DCA
-
LHR
1 stop11h 25m
Finnair
Deal found 24/3£477
Mon 27/418:10
LHR
-
DCA
2 stops33h 19m
Finnair
Mon 4/513:45
DCA
-
LHR
1 stop12h 55m
Finnair
Deal found 25/3£489
Tue 14/412:15
LHR
-
BWI
1 stop16h 41m
Finnair
Tue 21/418:38
BWI
-
LHR
1 stop13h 12m
Finnair
Deal found 24/3£489

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 February, with an average price of £371. Conversely, traveling with Finnair from London Heathrow Airport to Washington, D.C. in August will be the most expensive, with an average cost of £609. 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

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

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 27 March 2026.
British Airways flights from London Heathrow to Washington, D.C.
Virgin Atlantic 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 27 March 2026.
Finnair
7.7
Good
1,374 reviews
Check prices
Overview

Crew

8.2

Entertainment

6.9

Food

6.7

Comfort

7.5

Boarding

7.7

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.