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

Return flights

20 Aug - 03 Sep	KLM
28 Aug - 05 Sep	KLM
31 Aug - 05 Sep	KLM
20 Aug - 30 Aug	Lufthansa
29 Aug - 14 Sep	SWISS
21 Aug - 31 Aug	KLM
17 Aug - 27 Aug	KLM
13 Aug - 19 Aug	SWISS
04 Aug - 19 Aug	SWISS
04 Aug - 23 Aug	SWISS
06 Aug - 19 Aug	Lufthansa
05 Aug - 19 Aug	Lufthansa
11 Aug - 25 Aug	KLM
15 Aug - 29 Aug	KLM
01 Aug - 13 Sep	KLM
01 Aug - 03 Sep	KLM
18 Aug - 02 Sep	Delta
01 Aug - 01 Sep	KLM

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 875€

Return flights