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

Return flights

21 Apr - 05 May	Icelandair
21 Apr - 28 Apr	Icelandair
28 Apr - 03 May	jetBlue
27 Apr - 11 May	jetBlue
27 Apr - 03 May	jetBlue
20 Apr - 03 May	jetBlue
28 Apr - 09 May	Icelandair
25 Apr - 04 May	jetBlue
27 Apr - 09 May	jetBlue
20 Apr - 11 May	jetBlue
19 Apr - 04 May	jetBlue
19 Apr - 27 Apr	Avianca
14 Apr - 26 Apr	Avianca
14 Apr - 27 Apr	Avianca
14 Apr - 29 Apr	Avianca
14 Apr - 28 Apr	Avianca
20 Apr - 29 Apr	Avianca
22 Apr - 29 Apr	Avianca
20 Apr - 26 Apr	Avianca
13 Apr - 26 Apr	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 558€

Return flights