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

Return flights

18 Aug - 15 Sep	SWISS
20 Aug - 30 Aug	SWISS
19 Aug - 26 Aug	Lufthansa
18 Aug - 16 Sep	Iberia
19 Aug - 01 Sep	Lufthansa
29 Aug - 12 Sep	KLM
24 Aug - 30 Aug	Lufthansa
28 Aug - 06 Sep	KLM
20 Aug - 10 Sep	SWISS
13 Aug - 23 Aug	SWISS
11 Aug - 26 Aug	SWISS
13 Aug - 26 Aug	SWISS
29 Aug - 13 Sep	KLM
31 Aug - 06 Sep	KLM
21 Aug - 30 Aug	Lufthansa
20 Aug - 31 Aug	SWISS
17 Aug - 30 Aug	Lufthansa
31 Aug - 14 Sep	Iberia
16 Aug - 13 Sep	Iberia
04 Aug - 19 Aug	SWISS

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 791€

Return flights