Cheapest return flights from Washington to London in August from $578

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

Return flights

28 Aug - 04 Sep Scandinavian Airlines
28 Aug - 15 Sep Scandinavian Airlines
30 Aug - 15 Sep Scandinavian Airlines
22 Aug - 29 Aug Scandinavian Airlines
25 Aug - 10 Sep Air Canada
23 Aug - 29 Aug Scandinavian Airlines
25 Aug - 10 Sep American Airlines direct
31 Aug - 15 Sep Austrian Airlines
31 Aug - 15 Sep Finnair direct
30 Aug - 15 Sep Finnair direct
06 Aug - 13 Aug Lufthansa
14 Aug - 18 Aug Aer Lingus
16 Aug - 18 Aug Brussels Airlines
14 Aug - 18 Aug Finnair direct
28 Aug - 15 Sep American Airlines direct
28 Aug - 04 Sep American Airlines direct
06 Aug - 13 Aug Austrian Airlines direct
22 Aug - 29 Aug Finnair direct
03 Aug - 10 Aug SWISS
08 Aug - 15 Aug Finnair direct

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

Powered by

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.

Book a cheap hotel in London

Cheap car rent in London

Feel free to contact us with any feedback or request another flight research.