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

Return flights

29 Apr - 20 May	SWISS
29 Apr - 06 May	SWISS
08 Apr - 20 Apr	Air Dolomiti
14 Apr - 20 Apr	SWISS
29 Apr - 13 May	SWISS
28 Apr - 13 May	SWISS
12 Apr - 20 Apr	SWISS
29 Apr - 11 May	SWISS
15 Apr - 27 Apr	SWISS
14 Apr - 22 Apr	SWISS
30 Apr - 11 May	KLM
08 Apr - 22 Apr	SWISS
05 Apr - 20 Apr	SWISS
13 Apr - 27 Apr	KLM
01 Apr - 20 Apr	SWISS
12 Apr - 22 Apr	SWISS
28 Apr - 19 May	Lufthansa
28 Apr - 07 May	Lufthansa
24 Apr - 11 May	KLM
24 Apr - 12 May	KLM

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 $845

Return flights