Cheapest return flights from London to San Jose in September from $1299

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

Return flights

18 Sep - 25 Sep SWISS
18 Sep - 27 Sep SWISS
21 Sep - 28 Sep SWISS
17 Sep - 24 Sep Delta
26 Sep - 01 Oct SWISS
22 Sep - 29 Sep KLM
19 Sep - 30 Sep KLM
25 Sep - 28 Sep KLM
22 Sep - 30 Sep Lufthansa
23 Sep - 28 Sep Lufthansa
21 Sep - 01 Oct Delta
23 Sep - 29 Sep Delta
28 Sep - 13 Oct Delta

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

Skyscanner

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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