AirHint found the following cheapest return flights from London (LTN) to San Jose (SJO) in August 2025 (see full year).

Return flights

31 Aug - 16 Sep	Ryanair
23 Aug - 22 Sep	Ryanair
28 Aug - 15 Sep	easyJet
19 Aug - 09 Sep	easyJet
28 Aug - 16 Sep	easyJet
22 Aug - 09 Sep	easyJet
20 Aug - 07 Sep	easyJet
17 Aug - 15 Sep	easyJet
17 Aug - 01 Sep	easyJet
18 Aug - 30 Aug	easyJet
18 Aug - 01 Sep	easyJet
16 Aug - 24 Aug	Ryanair
15 Aug - 17 Aug	easyJet
15 Aug - 22 Aug	easyJet
19 Aug - 26 Aug	easyJet
20 Aug - 27 Aug	easyJet
16 Aug - 27 Aug	Ryanair
21 Aug - 31 Aug	Ryanair
18 Aug - 25 Aug	Ryanair
15 Aug - 19 Aug	easyJet

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 827€

Return flights