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

Return flights

01 Oct - 15 Oct	jetBlue
17 Oct - 21 Oct	jetBlue
10 Oct - 17 Oct	jetBlue
14 Oct - 19 Oct	jetBlue
26 Oct - 02 Nov	jetBlue
01 Oct - 08 Oct	Iberia
10 Oct - 19 Oct	jetBlue
16 Oct - 20 Oct	jetBlue
09 Oct - 14 Oct	Iberia
15 Oct - 23 Oct	Iberia
16 Oct - 22 Oct	Iberia
30 Oct - 11 Nov	Air Canada

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 466€

Return flights