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

Return flights

12 Mar - 14 Mar	Brussels Airlines
03 Mar - 10 Mar	SWISS
06 Mar - 14 Mar	Lufthansa
19 Mar - 31 Mar	Lufthansa
19 Mar - 30 Mar	Lufthansa
11 Mar - 18 Mar	Lufthansa
12 Mar - 18 Mar	Lufthansa
19 Mar - 24 Mar	Lufthansa
06 Mar - 16 Mar	Lufthansa
13 Mar - 20 Mar	Lufthansa
18 Mar - 06 Apr	British Airways
18 Mar - 01 Apr	Lufthansa
31 Mar - 07 Apr	Icelandair
20 Mar - 15 Apr	Lufthansa
24 Mar - 14 Apr	Lufthansa
24 Mar - 02 Apr	Lufthansa
24 Mar - 07 Apr	British Airways
21 Mar - 02 Apr	Lufthansa
22 Mar - 02 Apr	Lufthansa
26 Mar - 13 Apr	Scandinavian Airlines

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

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 March from 440€

Return flights