Currently, the most affordable month to book a United Airlines flight from San Francisco to Washington, D.C. in September, with an average price of $279. Conversely, traveling with United Airlines from San Francisco to Washington, D.C. in June will be the most expensive, with an average cost of $395. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.
January
$308
February
$303
March
$358
April
$337
May
$339
June
$395
July
$376
August
$297
September
$279
October
$303
November
$328
December
$292
WAS Temperature | 35.6 - 80.6 °F |
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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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).
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