Cheapest return flights from Washington to London in May from $433

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

Return flights

06 May - 16 May TAP
02 May - 13 May Icelandair
03 May - 14 May Icelandair
04 May - 20 May Icelandair
04 May - 16 May Icelandair
01 May - 14 May Icelandair
01 May - 16 May Icelandair
04 May - 10 May Icelandair
02 May - 12 May Icelandair
05 May - 12 May Icelandair
20 May - 02 Jun Air Canada
20 May - 09 Jun Air Canada
26 May - 09 Jun ITA Airways
20 May - 02 Jun Iberia direct
28 May - 08 Jun Icelandair
25 May - 01 Jun Icelandair
26 May - 09 Jun British Airways direct
30 May - 06 Jun Icelandair
30 May - 06 Jun British Airways direct

Also check the deals for one-way 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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