Cheapest one-way flights from Washington to London in May from 242€

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

One-Way flights

10 May Aer Lingus
13 May Icelandair
08 May Icelandair
16 May Icelandair
01 May Icelandair
17 May Frontier Airlines
18 May Icelandair
19 May Aer Lingus
25 May Lufthansa
30 May Porter Airlines (Canada) Ltd

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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