Cheapest return flights from Washington to London in October from 549€

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 October 2025 (see full year).

Return flights

01 Oct - 15 Oct Icelandair
01 Oct - 08 Oct Scandinavian Airlines
08 Oct - 14 Oct Scandinavian Airlines
09 Oct - 14 Oct Icelandair
10 Oct - 20 Oct Icelandair
16 Oct - 23 Oct Icelandair
07 Oct - 14 Oct Icelandair
01 Oct - 15 Oct Finnair direct
01 Oct - 08 Oct Finnair direct
08 Oct - 14 Oct Finnair direct
25 Oct - 08 Nov Scandinavian Airlines
25 Oct - 08 Nov Finnair direct

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

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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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