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

Return flights

12 Sep - 15 Sep	TAP
24 Sep - 29 Sep	TAP
25 Sep - 29 Sep	TAP
12 Sep - 23 Sep	TAP
10 Sep - 23 Sep	TAP
11 Sep - 23 Sep	TAP
17 Sep - 23 Sep	TAP
24 Sep - 04 Oct	TAP
17 Sep - 22 Sep	TAP
10 Sep - 21 Sep	TAP
10 Sep - 16 Sep	TAP
30 Sep - 05 Oct	TAP
28 Sep - 04 Oct	TAP
23 Sep - 04 Oct	Air Europa
25 Sep - 02 Oct	TAP
24 Sep - 01 Oct	TAP
29 Sep - 06 Oct	Vueling Airlines
28 Sep - 05 Oct	TAP
29 Sep - 04 Oct	TAP
29 Sep - 05 Oct	TAP

Also check the deals for one-way flights from Bilbao to Newark 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 Newark in September from 346€

Return flights