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

Return flights

13 Sep - 20 Sep	Air France
11 Sep - 24 Sep	Air France
18 Sep - 01 Oct	Air France
18 Sep - 26 Sep	SWISS
19 Sep - 26 Sep	Lufthansa
17 Sep - 26 Sep	Lufthansa
13 Sep - 27 Sep	Eurowings
23 Sep - 27 Sep	Eurowings
09 Sep - 24 Sep	Eurowings
17 Sep - 25 Sep	Eurowings
14 Sep - 21 Sep	Lufthansa

Also check the deals for one-way flights from Stuttgart 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 Stuttgart to San Jose in September from 542€

Return flights