Cheapest return flights from Washington to London in May from $654

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

Return flights

06 May - 12 May jetBlue
12 May - 19 May jetBlue
07 May - 11 May jetBlue
07 May - 10 May jetBlue
02 May - 13 May jetBlue
02 May - 08 May jetBlue
08 May - 17 May jetBlue
04 May - 18 May British Airways
20 May - 26 May Air Canada
20 May - 09 Jun Air Canada
20 May - 02 Jun British Airways
01 May - 16 May British Airways
15 May - 23 Jun Air Canada
31 May - 10 Jun Air Canada
26 May - 09 Jun Air Canada
31 May - 06 Jun Air Canada
22 May - 04 Jun Air Canada

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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