Cheapest return flights from Washington to London in August from $486

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

Return flights

29 Aug - 31 Aug Scandinavian Airlines
21 Aug - 24 Aug Scandinavian Airlines
28 Aug - 31 Aug Scandinavian Airlines
12 Aug - 28 Aug TAP
26 Aug - 01 Sep Air Canada
25 Aug - 01 Sep Air Canada
20 Aug - 27 Aug Scandinavian Airlines
30 Aug - 05 Sep Scandinavian Airlines
27 Aug - 04 Sep Scandinavian Airlines
31 Aug - 04 Sep Scandinavian Airlines
28 Aug - 01 Sep Scandinavian Airlines
04 Aug - 20 Aug Air Canada
10 Aug - 30 Aug TAP
12 Aug - 20 Aug Delta
10 Aug - 18 Aug Air Canada
10 Aug - 21 Aug Aer Lingus
25 Aug - 01 Sep British Airways direct
20 Aug - 03 Sep Delta
26 Aug - 01 Sep British Airways direct
27 Aug - 04 Sep American Airlines direct

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

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