Cheapest return flights from Washington to London in October from $525

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

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

Return flights

11 Oct - 25 Oct Icelandair
14 Oct - 28 Oct TAP

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

Skyscanner

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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