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

Return flights

06 May - 12 May	Finnair
04 May - 08 May	Finnair
01 May - 15 May	Finnair
16 May - 30 May	Air Canada
19 May - 26 May	Avianca
18 May - 25 May	Avianca
12 May - 31 May	Avianca
11 May - 29 May	Avianca
03 May - 20 May	Avianca
18 May - 31 May	Avianca
18 May - 03 Jun	Avianca
27 May - 03 Jun	Avianca
27 May - 10 Jun	Avianca
21 May - 02 Jun	Avianca
21 May - 03 Jun	Avianca
22 May - 07 Jun	KLM
25 May - 07 Jun	Avianca
23 May - 07 Jun	Avianca
21 May - 04 Jun	Avianca
25 May - 08 Jun	Avianca

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 575€

Return flights