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

Return flights

29 Oct - 05 Nov	United
21 Oct - 28 Oct	United
25 Oct - 05 Nov	United
14 Oct - 21 Oct	United
01 Oct - 08 Oct	United
29 Oct - 05 Nov	British Airways	direct
01 Oct - 08 Oct	British Airways	direct
08 Oct - 15 Oct	Delta
01 Oct - 15 Oct	Hawaiian Airlines
19 Oct - 26 Oct	United
24 Oct - 31 Oct	United
14 Oct - 09 Nov	United
23 Oct - 30 Oct	United
30 Oct - 06 Nov	United
25 Oct - 05 Nov	British Airways	direct
09 Oct - 16 Oct	British Airways	direct
25 Oct - 01 Nov	British Airways	direct
14 Oct - 09 Nov	British Airways	direct

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 564€

Return flights