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

Return flights

23 Jul - 27 Aug	jetBlue
25 Jul - 03 Aug	jetBlue
28 Jul - 03 Aug	jetBlue
19 Jul - 23 Jul	jetBlue
07 Jul - 21 Jul	jetBlue
31 Jul - 06 Aug	Iberia
12 Jul - 26 Jul	Virgin Atlantic
28 Jul - 13 Aug	ITA Airways
27 Jul - 03 Aug	Virgin Atlantic
13 Jul - 15 Jul	jetBlue
08 Jul - 31 Jul	Virgin Atlantic
25 Jul - 21 Aug	Iberia
10 Jul - 24 Jul	jetBlue
10 Jul - 16 Jul	Scandinavian Airlines
16 Jul - 23 Jul	Scandinavian Airlines
11 Jul - 26 Jul	Virgin Atlantic
23 Jul - 28 Jul	ITA Airways
25 Jul - 01 Aug	Iberia
31 Jul - 03 Aug	Virgin Atlantic
31 Jul - 07 Aug	Iberia

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 489€

Return flights