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 29 April 2025.
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 29 April 2025.
Explore the most affordable Finnair flight options available from London to Washington, D.C.. Find the lowest fares with prices last updated on 29 April 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.
How far ahead should I book a flight from London to Washington, D.C. with Finnair?
Use this chart to determine the optimal time to book a return flight from London to Washington, D.C.. Price data was last updated on 25 April 2025.
Booking with Finnair 48 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Washington, D.C.. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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 January, with an average price of £418. Conversely, traveling with Finnair from London to Washington, D.C. in June will be the most expensive, with an average cost of £538. 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 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.
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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 29 April 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 29 April 2025.
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