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

Return flights

08 May - 19 May	Ryanair
11 May - 25 May	Ryanair
19 May - 29 May	Ryanair
10 May - 19 May	Ryanair
01 May - 15 May	Ryanair
28 May - 12 Jun	Ryanair
01 May - 21 May	Ryanair
24 May - 03 Jun	Ryanair
11 May - 20 May	Ryanair
25 May - 08 Jun	Ryanair
05 May - 26 May	Ryanair
24 May - 07 Jun	Ryanair
06 May - 18 May	Ryanair
14 May - 22 May	Ryanair
23 May - 01 Jun	Ryanair
26 May - 01 Jun	easyJet

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 851€

Return flights