Cheapest one-way flights from Washington to London in May from $322

AirHint found the following cheapest one-way flights from Washington (IAD) to London (LHR) in May 2026 (see full year).

One-Way flights

06 May Icelandair
13 May Aer Lingus
22 May Scandinavian Airlines
23 May Scandinavian Airlines
20 May Scandinavian Airlines
02 May Scandinavian Airlines
15 May Scandinavian Airlines
16 May Scandinavian Airlines
06 May British Airways direct
10 May Air France direct

Also check the deals for return flights from Washington to London in May.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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