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

Return flights

15 Aug - 29 Aug	Spirit Airlines
13 Aug - 27 Aug	Spirit Airlines
07 Aug - 21 Aug	Spirit Airlines
16 Aug - 23 Aug	Spirit Airlines
10 Aug - 24 Aug	Spirit Airlines
04 Aug - 20 Aug	Virgin Atlantic
29 Aug - 01 Sep	Spirit Airlines
30 Aug - 08 Sep	Delta
01 Aug - 09 Aug	Spirit Airlines

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

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 August from 486€

Return flights