Cheapest return flights from San Diego to London in September from $611

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

Return flights

30 Sep - 07 Oct Air Canada
24 Sep - 29 Sep Air Canada
24 Sep - 18 Oct Spirit Airlines
18 Sep - 11 Oct Alaska Airlines
23 Sep - 18 Oct Air Canada
21 Sep - 01 Oct Frontier Airlines
28 Sep - 29 Oct Hawaiian Airlines
27 Sep - 07 Oct Alaska Airlines
26 Sep - 07 Oct Air Canada
21 Sep - 28 Sep Air Canada
22 Sep - 03 Oct Air Canada
21 Sep - 06 Oct Air Canada

Also check the deals for one-way flights from San Diego to London in September.

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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