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

Return flights

31 Jan - 23 Feb	Lufthansa
31 Jan - 06 Feb	Lufthansa
31 Jan - 14 Feb	Lufthansa
31 Jan - 07 Feb	SWISS
30 Jan - 09 Feb	Lufthansa
27 Jan - 03 Feb	Air Canada
23 Jan - 25 Jan	Air Canada
28 Jan - 02 Feb	British Airways
26 Jan - 04 Feb	British Airways
31 Jan - 08 Feb	SWISS
30 Jan - 23 Feb	Lufthansa
21 Jan - 28 Jan	WestJet
21 Jan - 25 Jan	WestJet
20 Jan - 30 Jan	WestJet
29 Jan - 30 Jan	jetBlue
20 Jan - 27 Jan	jetBlue
20 Jan - 24 Jan	jetBlue
19 Jan - 23 Jan	jetBlue
21 Jan - 25 Jan	Aer Lingus	direct
21 Jan - 28 Jan	Aer Lingus	direct

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

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 London to San Diego in January from 467€

Return flights