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

Return flights

06 Aug - 29 Aug	Spirit Airlines
15 Aug - 05 Sep	Spirit Airlines
07 Aug - 21 Aug	Spirit Airlines
13 Aug - 27 Aug	Spirit Airlines
19 Aug - 27 Aug	Spirit Airlines
15 Aug - 29 Aug	Frontier Airlines
25 Aug - 08 Sep	Frontier Airlines
04 Aug - 20 Aug	Spirit Airlines
22 Aug - 24 Aug	Spirit Airlines
28 Aug - 07 Sep	Spirit Airlines
15 Aug - 17 Aug	Spirit Airlines
16 Aug - 23 Aug	Spirit Airlines
16 Aug - 18 Aug	Spirit Airlines
28 Aug - 01 Sep	Spirit Airlines
30 Aug - 08 Sep	Delta
26 Aug - 19 Sep	Icelandair

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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from San Diego to London in August from $482

Return flights