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

Return flights

23 Apr - 05 May	SWISS
21 Apr - 30 Apr	SWISS
23 Apr - 09 May	SWISS
13 Apr - 27 Apr	KLM
13 Apr - 16 Apr	KLM
07 Apr - 21 Apr	SWISS
11 Apr - 18 Apr	SWISS
01 Apr - 06 Apr	KLM
02 Apr - 06 Apr	KLM
05 Apr - 16 Apr	KLM
11 Apr - 25 Apr	KLM
02 Apr - 16 Apr	KLM
17 Apr - 02 May	KLM
23 Apr - 10 May	Delta
25 Apr - 10 May	Delta
18 Apr - 03 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 $1140

Return flights