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

Return flights

14 Apr - 28 Apr	Icelandair
18 Apr - 01 May	Icelandair
09 Apr - 26 Apr	Icelandair
16 Apr - 25 Apr	Icelandair
08 Apr - 21 Apr	Icelandair
09 Apr - 25 Apr	Icelandair
11 Apr - 25 Apr	Icelandair
14 Apr - 19 Apr	Icelandair
19 Apr - 26 Apr	Icelandair
24 Apr - 04 May	SWISS
23 Apr - 04 May	SWISS
24 Apr - 06 May	SWISS
24 Apr - 10 May	SWISS
24 Apr - 05 May	SWISS
29 Apr - 06 May	SWISS
28 Apr - 07 May	SWISS
24 Apr - 08 May	SWISS
16 Apr - 27 Apr	KLM
21 Apr - 09 May	Air Canada
16 Apr - 24 Apr	Air France

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