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

Return flights

11 Sep - 24 Sep	SWISS
19 Sep - 03 Oct	SWISS
18 Sep - 03 Oct	SWISS
10 Sep - 08 Oct	SWISS
20 Sep - 04 Oct	Air Canada
27 Sep - 11 Oct	Air Canada
13 Sep - 04 Oct	Air Canada
27 Sep - 09 Oct	Air Canada
26 Sep - 03 Oct	Air Canada
26 Sep - 12 Oct	Air Canada
30 Sep - 17 Oct	Air Canada
15 Sep - 28 Sep	Air Canada
10 Sep - 18 Sep	United
10 Sep - 15 Sep	United
11 Sep - 25 Sep	United
02 Sep - 16 Sep	United
14 Sep - 26 Sep	United
08 Sep - 29 Sep	United
07 Sep - 14 Sep	United
17 Sep - 24 Sep	United

Also check the deals for one-way flights from Amsterdam 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 Amsterdam to San Jose in September from 527€

Return flights