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

Return flights

29 Aug - 09 Sep	SWISS
22 Aug - 31 Aug	SWISS
20 Aug - 31 Aug	SWISS
15 Aug - 13 Sep	Lufthansa
21 Aug - 24 Aug	SWISS
03 Aug - 18 Aug	Lufthansa
20 Aug - 28 Aug	SWISS
04 Aug - 18 Aug	Lufthansa
15 Aug - 29 Aug	Lufthansa
05 Aug - 17 Aug	Lufthansa
13 Aug - 29 Aug	Lufthansa
03 Aug - 24 Aug	Lufthansa
20 Aug - 03 Sep	Finnair
07 Aug - 01 Sep	Lufthansa

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 665€

Return flights