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

Return flights

28 Jul - 22 Aug	jetBlue
29 Jul - 22 Aug	jetBlue
20 Jul - 15 Aug	jetBlue
11 Jul - 22 Jul	jetBlue
06 Jul - 13 Jul	jetBlue
13 Jul - 08 Aug	jetBlue
09 Jul - 12 Jul	jetBlue
23 Jul - 15 Aug	jetBlue
12 Jul - 20 Jul	jetBlue
11 Jul - 01 Aug	Icelandair
21 Jul - 03 Aug	Icelandair
22 Jul - 02 Aug	Icelandair
09 Jul - 16 Jul	TAP
08 Jul - 01 Aug	Icelandair
07 Jul - 01 Aug	Icelandair

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

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 July from $676

Return flights