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

Return flights

18 Sep - 24 Sep	TAP
26 Sep - 29 Sep	TAP
22 Sep - 29 Sep	TAP
22 Sep - 30 Sep	TAP
10 Sep - 20 Sep	TAP
24 Sep - 30 Sep	TAP
15 Sep - 21 Sep	TAP
10 Sep - 15 Sep	TAP
26 Sep - 04 Oct	TAP
17 Sep - 23 Sep	TAP
26 Sep - 30 Sep	TAP
28 Sep - 04 Oct	TAP
28 Sep - 06 Oct	TAP
29 Sep - 05 Oct	TAP
27 Sep - 04 Oct	Delta
07 Sep - 12 Oct	Vueling Airlines

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.

Book a cheap hotel in Newark

Cheap car rent in Newark

Cheapest return flights from Bilbao to Newark in September from 346€

Return flights