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

Return flights

16 Apr - 23 Apr	Air Canada
08 Apr - 16 Apr	Air Canada
10 Apr - 24 Apr	Air Canada
11 Apr - 26 Apr	Air Canada
11 Apr - 22 Apr	Air Canada
01 Apr - 15 Apr	Lufthansa
06 Apr - 20 Apr	Aer Lingus
17 Apr - 24 Apr	Air Canada
06 Apr - 16 Apr	Air Canada
12 Apr - 19 Apr	SWISS
25 Apr - 09 May	Air Canada
24 Apr - 03 May	SWISS
18 Apr - 03 May	Avianca
17 Apr - 03 May	Avianca
17 Apr - 01 May	Air Canada
25 Apr - 02 May	Avianca
17 Apr - 02 May	Air Canada
18 Apr - 02 May	American Airlines
04 Apr - 16 May	Delta

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 636€

Return flights