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

Return flights

13 May - 20 May	SWISS
30 May - 02 Jun	KLM
17 May - 26 May	KLM
20 May - 02 Jun	KLM
29 May - 02 Jun	KLM
14 May - 02 Jun	KLM
04 May - 23 Jun	KLM
26 May - 03 Jun	Iberia
04 May - 18 May	KLM
01 May - 18 Jun	KLM
19 May - 03 Jun	SWISS
20 May - 03 Jun	SWISS
06 May - 19 May	KLM
28 May - 06 Jun	Iberia
01 May - 19 May	KLM
06 May - 12 May	KLM
12 May - 21 May	Iberia
21 May - 26 May	SWISS
09 May - 16 May	KLM
14 May - 21 May	SWISS

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 $847

Return flights