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

Return flights

22 Apr - 06 May	Air Canada
01 Apr - 15 Apr	United
07 Apr - 16 Apr	Air Canada
29 Apr - 06 May	United
01 Apr - 15 Apr	British Airways	direct
07 Apr - 16 Apr	American Airlines	direct
29 Apr - 06 May	British Airways	direct
17 Apr - 24 Apr	United
09 Apr - 16 Apr	United
19 Apr - 26 Apr	United
17 Apr - 24 Apr	Finnair	direct
09 Apr - 16 Apr	British Airways	direct
19 Apr - 26 Apr	British Airways	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 $673

Return flights