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

Return flights

25 May - 29 Jun	Air France
23 May - 05 Jun	Air France
14 May - 02 Jun	KLM
21 May - 26 May	KLM
10 May - 24 May	Air France
22 May - 24 May	Air France
15 May - 24 May	Air France
19 May - 23 Jun	Air France
19 May - 29 Jun	Air France
04 May - 12 May	TAP
10 May - 25 May	SWISS
08 May - 25 May	SWISS
05 May - 12 May	Norse Atlantic Airways (UK)
20 May - 30 May	SWISS
14 May - 28 May	SWISS
30 May - 08 Jun	Air France
28 May - 04 Jun	easyJet
26 May - 04 Jun	Norse Atlantic Airways (UK)

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 620€

Return flights