Currently, the most affordable month to book a Finnair flight from London Heathrow Airport to Washington, D.C. in November, with an average price of £597. Conversely, traveling with Finnair from London Heathrow Airport to Washington, D.C. in June will be the most expensive, with an average cost of £861. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.
January
£472
February
£491
March
£551
April
£529
May
£585
June
£679
July
£677
August
£604
September
£540
October
£505
November
£471
December
£488
WAS Temperature | 2 - 27 °C |
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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).
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