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

Return flights

02 Jun - 07 Jun	British Airways
09 Jun - 15 Jun	British Airways
05 Jun - 16 Jun	British Airways
05 Jun - 09 Jun	British Airways
17 Jun - 24 Jun	Air Canada
22 Jun - 03 Jul	Air Canada
21 Jun - 03 Jul	Air Canada
23 Jun - 30 Jun	British Airways
23 Jun - 01 Jul	British Airways
18 Jun - 30 Jun	Air Canada
18 Jun - 25 Jun	Air Canada
15 Jun - 22 Jun	Air Canada
28 Jun - 18 Jul	Air Canada
25 Jun - 30 Jun	Air Canada
26 Jun - 06 Jul	Air Canada
18 Jun - 05 Jul	Air Canada

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

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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Cheapest return flights from Washington to London in June from $954

Return flights