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

Return flights

29 Aug - 12 Sep	SWISS
29 Aug - 09 Sep	SWISS
29 Aug - 11 Sep	Avianca
28 Aug - 11 Sep	Avianca
06 Aug - 20 Aug	Lufthansa
11 Aug - 25 Aug	Lufthansa
04 Aug - 18 Aug	Brussels Airlines
14 Aug - 28 Aug	Lufthansa
03 Aug - 17 Aug	Brussels Airlines
21 Aug - 30 Aug	Lufthansa
13 Aug - 30 Aug	Lufthansa
03 Aug - 18 Aug	Brussels Airlines
03 Aug - 20 Aug	Finnair
12 Aug - 26 Aug	Finnair
07 Aug - 01 Sep	American Airlines

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

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 August from 635€

Return flights