AirHint found the following cheapest return flights from Bilbao (BIO) to New York (JFK) in September 2025 (see full year).

Return flights

15 Sep - 29 Sep	TAP
17 Sep - 24 Sep	TAP
12 Sep - 22 Sep	TAP
12 Sep - 15 Sep	TAP
17 Sep - 23 Sep	TAP
24 Sep - 06 Oct	TAP
18 Sep - 22 Sep	TAP
25 Sep - 06 Oct	TAP
12 Sep - 23 Sep	TAP
30 Sep - 08 Oct	TAP
19 Sep - 29 Sep	TAP
10 Sep - 20 Sep	TAP
22 Sep - 29 Sep	TAP
26 Sep - 04 Oct	TAP
28 Sep - 04 Oct	TAP
22 Sep - 05 Oct	Air Europa
26 Sep - 03 Oct	Vueling Airlines
26 Sep - 02 Oct	Volotea
28 Sep - 05 Oct	Air Europa
29 Sep - 08 Oct	Air Europa

Also check the deals for one-way flights from Bilbao to New York 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 Bilbao to New York in September from $399

Return flights