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

Return flights

27 Oct - 12 Nov	Air Canada
16 Oct - 24 Oct	Scandinavian Airlines
09 Oct - 11 Oct	Scandinavian Airlines
27 Oct - 12 Nov	British Airways	direct
20 Oct - 03 Nov	British Airways	direct
16 Oct - 24 Oct	American Airlines	direct
09 Oct - 11 Oct	British Airways	direct

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

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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Cheapest return flights from Washington to London in October from $597

Return flights