Cheapest return flights from Washington to London in August from $441

Best time to book flights for Washington (IAD) to London (LHR) flights at AirHint

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

Return flights

20 Aug - 27 Aug Scandinavian Airlines
20 Aug - 26 Aug Scandinavian Airlines
21 Aug - 25 Aug Scandinavian Airlines
17 Aug - 25 Aug Scandinavian Airlines
27 Aug - 01 Sep Scandinavian Airlines
20 Aug - 07 Sep Scandinavian Airlines
15 Aug - 30 Aug Icelandair
28 Aug - 02 Sep Scandinavian Airlines
04 Aug - 18 Aug Icelandair
15 Aug - 29 Aug Icelandair
11 Aug - 20 Aug Icelandair
11 Aug - 20 Aug Iberia direct
20 Aug - 26 Aug Iberia direct
28 Aug - 01 Sep Icelandair
22 Aug - 07 Sep Scandinavian Airlines
27 Aug - 01 Sep Iberia direct
20 Aug - 07 Sep Iberia direct
29 Aug - 05 Sep Icelandair
30 Aug - 16 Sep Icelandair
28 Aug - 02 Sep Iberia 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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