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

Return flights

11 Sep - 23 Sep	Norse Atlantic Airways
18 Sep - 30 Sep	Norse Atlantic Airways
15 Sep - 26 Sep	Norse Atlantic Airways
04 Sep - 20 Sep	Norse Atlantic Airways
20 Sep - 04 Oct	Norse Atlantic Airways
13 Sep - 20 Sep	Norse Atlantic Airways
25 Sep - 15 Oct	Norse Atlantic Airways
06 Sep - 16 Sep	SWISS
05 Sep - 20 Sep	easyJet
05 Sep - 15 Sep	easyJet
10 Sep - 10 Oct	Iberia
13 Sep - 25 Sep	Delta
14 Sep - 26 Sep	Delta
23 Sep - 07 Oct	Delta
17 Sep - 02 Oct	Delta
19 Sep - 04 Oct	Delta
27 Sep - 11 Oct	Delta
26 Sep - 09 Oct	Delta
27 Sep - 31 Oct	Delta
01 Sep - 01 Oct	Iberia

Also check the deals for one-way flights from Paris 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 Paris to San Jose in September from $704

Return flights