Cheapest one-way flights from Washington to London in May from $309

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

One-Way flights

11 May Aer Lingus
13 May Icelandair
19 May Icelandair
17 May Icelandair
21 May Porter Airlines (Canada) Ltd
07 May Icelandair
09 May TAP
30 May Icelandair
22 May TAP

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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