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

Return flights

09 Apr - 16 Apr	SWISS
09 Apr - 19 Apr	SWISS
07 Apr - 14 Apr	Air Canada
15 Apr - 29 Apr	Air Canada
07 Apr - 19 Apr	Lufthansa
18 Apr - 25 Apr	Finnair
02 Apr - 16 Apr	Finnair
02 Apr - 21 Apr	Finnair
19 Apr - 27 Apr	Finnair
15 Apr - 30 Apr	Finnair
24 Apr - 08 May	Finnair
20 Apr - 04 May	Finnair
25 Apr - 06 May	Finnair
23 Apr - 02 May	Finnair
18 Apr - 03 May	Finnair
19 Apr - 03 May	American Airlines
18 Apr - 02 May	American Airlines
29 Apr - 20 May	Avianca
28 Apr - 07 May	Avianca

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 507€

Return flights