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

Return flights

29 May - 05 Jun	Air France
22 May - 05 Jun	Air France
03 May - 31 May	Air France
22 May - 31 May	Air France
26 May - 05 Jun	Air France
20 May - 31 May	Air France
01 May - 15 May	Finnair
07 May - 12 May	Finnair
02 May - 04 May	Finnair
14 May - 31 May	Air France
19 May - 31 May	Air France
04 May - 18 May	jetBlue
11 May - 19 May	Wizz Air UK
23 May - 01 Jun	jetBlue
18 May - 01 Jun	jetBlue
24 May - 03 Jun	Avianca
24 May - 04 Jun	Avianca
22 May - 02 Jun	Avianca
28 May - 14 Jun	KLM
28 May - 11 Jun	KLM

Also check the deals for one-way flights from London to San Jose in May.

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 May from 568€

Return flights