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

Return flights

20 Aug - 03 Sep	Lufthansa
22 Aug - 01 Sep	SWISS
22 Aug - 12 Sep	SWISS
20 Aug - 04 Sep	Lufthansa
30 Aug - 19 Sep	Avianca
24 Aug - 06 Sep	Lufthansa
11 Aug - 01 Sep	SWISS
06 Aug - 27 Aug	Lufthansa
06 Aug - 24 Aug	Lufthansa
17 Aug - 31 Aug	Avianca
17 Aug - 30 Aug	Avianca
22 Aug - 29 Aug	SWISS
07 Aug - 30 Aug	Lufthansa
06 Aug - 29 Aug	Lufthansa
16 Aug - 01 Sep	Lufthansa
12 Aug - 26 Aug	Finnair
10 Aug - 17 Aug	Lufthansa
01 Aug - 25 Aug	Lufthansa
01 Aug - 05 Sep	Aer Lingus

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 657€

Return flights