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

Return flights

17 Sep - 30 Sep	Wizz Air UK
30 Sep - 07 Oct	easyJet
16 Sep - 23 Sep	easyJet
22 Sep - 09 Oct	Ryanair
26 Sep - 08 Oct	easyJet
26 Sep - 02 Oct	easyJet
11 Sep - 25 Sep	easyJet
21 Sep - 01 Oct	easyJet
22 Sep - 04 Oct	Ryanair
14 Sep - 20 Sep	easyJet
11 Sep - 18 Sep	easyJet
12 Sep - 20 Sep	easyJet
17 Sep - 24 Sep	easyJet
12 Sep - 19 Sep	Wizz Air
12 Sep - 17 Sep	easyJet
20 Sep - 27 Sep	easyJet
22 Sep - 01 Oct	easyJet
18 Sep - 03 Oct	Ryanair
29 Sep - 03 Oct	easyJet
23 Sep - 06 Oct	easyJet

Also check the deals for one-way flights from London to San Jose in September.

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 September from 599€

Return flights