Cheapest return flights from Washington to London in August from 664€

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

Return flights

23 Aug - 28 Aug Icelandair
24 Aug - 29 Aug Icelandair
17 Aug - 24 Aug Icelandair
20 Aug - 25 Aug Icelandair
18 Aug - 24 Aug Icelandair
18 Aug - 25 Aug Icelandair
19 Aug - 31 Aug Icelandair
28 Aug - 04 Sep Icelandair
12 Aug - 19 Aug Air Canada
12 Aug - 20 Aug Aer Lingus
12 Aug - 18 Aug Brussels Airlines
17 Aug - 07 Sep SWISS
27 Aug - 09 Sep Virgin Atlantic
17 Aug - 07 Sep Delta direct
29 Aug - 01 Sep Aer Lingus
29 Aug - 01 Sep British Airways direct

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

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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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