Finnair flights from London Heathrow Airport to Washington, D.C. (LHR - 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 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 4 July 2025.
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 4 July 2025.
Explore the most affordable Finnair flight options available from Heathrow to Washington, D.C.. Find the lowest fares with prices last updated on 4 July 2025.
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 January, with an average price of £410. Conversely, traveling with Finnair from London Heathrow Airport to Washington, D.C. in August will be the most expensive, with an average cost of £597. 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.
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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 4 July 2025.
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 4 July 2025.
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