Route Price Intelligence
Cheap Flights From Washington, D.C. to London
Live pricing benchmarks, monthly patterns, and historical lows for this route.
IAD to London Heathrow usually runs around $840, and this TAP Air Portugal fare with one stop drops to $563, a third off. Seats are showing for travel this fall into early winter. A sub-$600 fare to one of the most requested international cities we track doesn't come around often.
✓ 4 date combinations found at this price
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Best Time to Fly from Washington, D.C. to London
The cheapest time to fly from Washington, D.C. to London is typically October, when fares average around $729. The most expensive month tends to be June at around $1,173. For the best deals, consider flying in October, November, September.
Typical Price by Travel Month
Median round-trip fare for each month, with the typical price range, from our ongoing tracking of this route