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

Return flights

07 Apr - 17 Apr	Air Canada
26 Apr - 13 May	SWISS
30 Apr - 22 May	Air Canada
13 Apr - 19 Apr	Air Canada
28 Apr - 12 May	Lufthansa
12 Apr - 26 Apr	SWISS
13 Apr - 26 Apr	Air Canada
01 Apr - 10 Apr	Lufthansa
14 Apr - 21 Apr	Lufthansa
25 Apr - 09 May	Air Canada
18 Apr - 25 Apr	KLM
04 Apr - 18 Apr	KLM
17 Apr - 25 Apr	KLM
10 Apr - 18 Apr	KLM
25 Apr - 02 May	KLM
25 Apr - 08 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 644€

Return flights