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

Return flights

08 Oct - 15 Oct	Alaska Airlines
01 Oct - 15 Oct	Spirit Airlines
15 Oct - 27 Oct	Alaska Airlines
23 Oct - 29 Oct	Spirit Airlines
23 Oct - 27 Oct	Alaska Airlines
06 Oct - 11 Oct	Spirit Airlines
13 Oct - 21 Oct	Alaska Airlines
05 Oct - 12 Oct	Alaska Airlines

Also check the deals for one-way flights from San Diego 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 San Diego to London in October from 477€

Return flights