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

Return flights

29 Apr - 27 May	SWISS
14 Apr - 21 Apr	SWISS
12 Apr - 20 Apr	SWISS
09 Apr - 22 Apr	SWISS
14 Apr - 27 Apr	SWISS
13 Apr - 27 Apr	KLM
07 Apr - 22 Apr	SWISS
07 Apr - 07 May	SWISS
08 Apr - 22 Apr	SWISS
30 Apr - 11 May	KLM
08 Apr - 06 May	SWISS
30 Apr - 12 May	KLM
10 Apr - 12 Apr	Virgin Atlantic
07 Apr - 15 Apr	SWISS
08 Apr - 29 Apr	SWISS
25 Apr - 02 May	SWISS
13 Apr - 04 May	Lufthansa
07 Apr - 05 May	SWISS
26 Apr - 09 May	KLM
16 Apr - 03 May	Lufthansa

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 700€

Return flights