AirHint found the following cheapest return flights from San Diego (SAN) to London (LHR) in May 2026 (see full year).

Return flights

06 May - 12 May	SWISS
05 May - 19 May	Delta
05 May - 12 May	United
13 May - 22 May	Delta
03 May - 16 May	Delta
04 May - 10 May	United
04 May - 10 May	British Airways	direct
03 May - 17 May	Air Canada
14 May - 21 May	Lufthansa
15 May - 22 May	Lufthansa
06 May - 09 Jun	Delta
28 May - 02 Jun	jetBlue
29 May - 03 Jun	jetBlue
27 May - 01 Jun	jetBlue
13 May - 13 Jun	Delta
18 May - 02 Jun	Frontier Airlines
26 May - 09 Jun	WestJet
18 May - 02 Jun	British Airways	direct
18 May - 06 Jun	Delta
31 May - 11 Jun	Delta

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

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 May from 561€

Return flights