AirHint found the following cheapest return flights from London (LON) to San Jose (SJO) in April 2026 (see full year).

Return flights

09 Apr - 14 Apr	Air Canada
09 Apr - 21 Apr	Austrian Airlines
14 Apr - 21 Apr	Austrian Airlines
09 Apr - 22 Apr	Air Canada
07 Apr - 19 Apr	Air Canada
09 Apr - 19 Apr	Air Canada
08 Apr - 22 Apr	Lufthansa
08 Apr - 21 Apr	Lufthansa
21 Apr - 05 May	jetBlue
11 Apr - 23 Apr	Air Canada
16 Apr - 23 Apr	Air Canada
21 Apr - 09 May	SWISS
24 Apr - 08 May	Finnair
29 Apr - 13 May	Finnair
24 Apr - 01 May	Finnair
17 Apr - 01 May	Finnair
17 Apr - 02 May	Finnair
17 Apr - 03 May	Finnair
25 Apr - 02 May	Finnair
24 Apr - 10 May	SWISS

Also check the deals for one-way flights from London to San Jose 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 London to San Jose in April from 491€

Return flights