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

Return flights

12 Jun - 21 Jun	Air France
05 Jun - 13 Jun	Air France
01 Jun - 08 Jun	jetBlue
19 Jun - 05 Jul	SWISS
06 Jun - 21 Jun	Air France
18 Jun - 25 Jun	SWISS
01 Jun - 22 Jun	Avianca
23 Jun - 05 Jul	SWISS
23 Jun - 03 Jul	Air France
18 Jun - 28 Jun	SWISS
05 Jun - 14 Jun	Air France
19 Jun - 01 Jul	Air France
08 Jun - 15 Jun	jetBlue
13 Jun - 20 Jun	Air France
22 Jun - 06 Jul	KLM
14 Jun - 23 Jul	Lufthansa
26 Jun - 13 Jul	Air Canada
21 Jun - 03 Jul	KLM
27 Jun - 10 Jul	KLM

Also check the deals for one-way flights from London to San Jose in June.

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 June from 559€

Return flights