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

Return flights

09 Sep - 27 Sep	Fly Play
25 Sep - 30 Sep	Norse Atlantic Airways
15 Sep - 22 Sep	Norse Atlantic Airways
08 Sep - 18 Sep	SWISS
08 Sep - 15 Sep	Delta
16 Sep - 23 Sep	Delta
23 Sep - 09 Oct	Delta
20 Sep - 04 Oct	Delta
20 Sep - 02 Oct	Delta
01 Sep - 15 Sep	Delta
08 Sep - 20 Sep	Air France	direct
20 Sep - 02 Oct	Air France	direct
02 Sep - 17 Sep	Delta
01 Sep - 12 Sep	Delta
18 Sep - 01 Oct	Delta
24 Sep - 06 Oct	Delta
26 Sep - 01 Oct	Delta
22 Sep - 13 Oct	Delta
24 Sep - 08 Oct	Delta
27 Sep - 10 Oct	Delta

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 626€

Return flights