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

Return flights

15 May - 26 May	KLM
14 May - 02 Jun	KLM
21 May - 26 May	KLM
22 May - 26 May	KLM
12 May - 20 May	Lufthansa
03 May - 14 Jun	KLM
13 May - 27 May	KLM
11 May - 19 May	KLM
09 May - 19 May	KLM
11 May - 18 May	KLM
14 May - 19 May	KLM
04 May - 18 May	KLM
18 May - 01 Jun	KLM
27 May - 03 Jun	SWISS
31 May - 04 Jun	KLM
25 May - 08 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 647€

Return flights