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

Return flights

01 Apr - 08 Apr	United
12 Apr - 19 Apr	Lufthansa
22 Apr - 29 Apr	British Airways	direct
01 Apr - 08 Apr	British Airways	direct
02 Apr - 09 Apr	United
02 Apr - 09 Apr	British Airways	direct
09 Apr - 12 Apr	United
03 Apr - 12 Apr	British Airways	direct
12 Apr - 19 Apr	Alaska Airlines	direct

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

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 April from 578€

Return flights