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

Return flights

27 Aug - 11 Sep	Lufthansa
31 Aug - 07 Sep	Lufthansa
14 Aug - 11 Sep	Lufthansa
14 Aug - 01 Sep	Lufthansa
21 Aug - 04 Sep	SWISS
22 Aug - 05 Sep	Wizz Air UK
27 Aug - 05 Sep	Wizz Air UK
13 Aug - 27 Aug	Lufthansa
17 Aug - 27 Aug	Lufthansa
23 Aug - 06 Sep	Lufthansa
28 Aug - 05 Sep	Air Europa
04 Aug - 24 Aug	Wizz Air UK
17 Aug - 31 Aug	Wizz Air UK
10 Aug - 22 Aug	Wizz Air UK
09 Aug - 14 Aug	KLM
29 Aug - 05 Sep	SWISS
04 Aug - 19 Aug	Wizz Air UK
17 Aug - 28 Aug	Wizz Air UK
11 Aug - 21 Aug	KLM
21 Aug - 23 Aug	Avianca

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 669€

Return flights