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

Return flights

05 May - 12 May	Icelandair
03 May - 12 May	Icelandair
09 May - 23 May	Icelandair
10 May - 17 May	Icelandair
09 May - 17 May	Icelandair
10 May - 16 May	Icelandair
05 May - 19 May	Icelandair
03 May - 19 May	Icelandair
12 May - 26 May	Icelandair
02 May - 10 May	Icelandair
25 May - 07 Jun	Air France
29 May - 14 Jun	Air France
17 May - 10 Jun	KLM
28 May - 14 Jun	KLM
09 May - 07 Jun	Air France
25 May - 08 Jun	Air France
27 May - 10 Jun	Air France
18 May - 01 Jun	Avianca
29 May - 05 Jun	Avianca
24 May - 02 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.

Book a cheap hotel in San Jose

Cheap car rent in San Jose

Cheapest return flights from London to San Jose in May from 578€

Return flights