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

Return flights

12 Aug - 20 Aug	Lufthansa
19 Aug - 27 Aug	Air Canada
20 Aug - 27 Aug	Air Canada
19 Aug - 26 Aug	United
27 Aug - 03 Sep	United
04 Aug - 20 Aug	United
13 Aug - 20 Aug	British Airways	direct
04 Aug - 20 Aug	British Airways	direct
09 Aug - 20 Aug	Delta
03 Aug - 19 Aug	KLM
10 Aug - 19 Aug	Delta
27 Aug - 06 Sep	Air Canada
25 Aug - 01 Sep	United
25 Aug - 01 Sep	British Airways	direct
26 Aug - 21 Sep	Air Canada
31 Aug - 15 Sep	United
30 Aug - 06 Sep	Frontier Airlines
29 Aug - 12 Sep	United

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 544€

Return flights