Currently, the most affordable month to book a Finnair flight from London to Washington, D.C. in January, with an average price of £598. Conversely, traveling with Finnair from London to Washington, D.C. in July will be the most expensive, with an average cost of £856. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.
January
£479
February
£498
March
£559
April
£537
May
£603
June
£683
July
£685
August
£608
September
£551
October
£522
November
£481
December
£495
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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