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

Return flights

11 May - 17 May	jetBlue
04 May - 17 May	jetBlue
04 May - 11 May	jetBlue
12 May - 14 May	Avianca
18 May - 20 May	Avianca
15 May - 18 May	jetBlue
04 May - 14 May	jetBlue
18 May - 19 May	Avianca
07 May - 17 May	jetBlue
07 May - 18 May	jetBlue
25 May - 05 Jun	Avianca
03 May - 14 Jun	Avianca
14 May - 02 Jun	Avianca
12 May - 05 Jun	Avianca
26 May - 06 Jun	Avianca
18 May - 01 Jun	Avianca
26 May - 02 Jun	Avianca
24 May - 11 Jun	Avianca
24 May - 05 Jun	Avianca
28 May - 10 Jun	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 582€

Return flights