Cheapest return flights from London to Washington in May from 542€

Best time to book flights for London (LHR) to Washington (IAD) flights at AirHint

AirHint found the following cheapest return flights from London (LHR) to Washington (IAD) in May 2025 (see full year).

Return flights

05 May - 13 May Icelandair
09 May - 12 May British Airways
09 May - 14 May British Airways
09 May - 18 May British Airways
15 May - 18 May British Airways
28 May - 01 Jun British Airways
15 May - 21 May British Airways
03 May - 10 May British Airways
12 May - 18 May British Airways
02 May - 16 May Icelandair
17 May - 24 May Aer Lingus
31 May - 12 Jun Scandinavian Airlines
30 May - 13 Jun Scandinavian Airlines
26 May - 08 Jun Scandinavian Airlines
26 May - 15 Jun Icelandair
03 May - 01 Jun Scandinavian Airlines
31 May - 09 Jun Scandinavian Airlines
22 May - 02 Jun Icelandair
23 May - 09 Jun Icelandair
03 May - 01 Jun Air France direct

Also check the deals for one-way flights from London to Washington 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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