Cheapest one-way flights from Washington to London in May from $320

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

One-Way flights

18 May Icelandair
16 May Icelandair
09 May Icelandair
13 May Icelandair
07 May Icelandair
15 May Icelandair
14 May Scandinavian Airlines
13 May British Airways direct
20 May Aer Lingus
03 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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