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

Return flights

29 Jun - 08 Jul	jetBlue
24 Jun - 01 Jul	jetBlue
30 Jun - 31 Jul	Iberia
17 Jun - 24 Jun	Air Canada
18 Jun - 24 Jun	Air Canada
24 Jun - 30 Jun	jetBlue
15 Jun - 23 Jun	Air Canada
28 Jun - 08 Jul	jetBlue
27 Jun - 11 Jul	jetBlue
30 Jun - 10 Jul	jetBlue
25 Jun - 09 Jul	jetBlue
30 Jun - 11 Jul	jetBlue
27 Jun - 03 Jul	jetBlue
25 Jun - 01 Jul	jetBlue
19 Jun - 27 Jun	jetBlue
16 Jun - 23 Jun	Air Canada
18 Jun - 30 Jun	Air Canada
15 Jun - 19 Jun	jetBlue
20 Jun - 23 Jun	jetBlue
25 Jun - 29 Jun	jetBlue

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 $859

Return flights