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

Return flights

25 Sep - 10 Oct	Vueling Airlines
24 Sep - 28 Sep	Vueling Airlines
25 Sep - 28 Sep	Vueling Airlines
14 Sep - 23 Sep	Lufthansa	direct
12 Sep - 23 Sep	United	direct
12 Sep - 18 Sep	Lufthansa	direct
12 Sep - 20 Sep	Lufthansa	direct
17 Sep - 23 Sep	Lufthansa	direct
19 Sep - 23 Sep	Lufthansa	direct
10 Sep - 23 Sep	TAP
19 Sep - 28 Sep	Vueling Airlines
17 Sep - 01 Oct	Delta
24 Sep - 08 Oct	Air France
29 Sep - 06 Oct	Delta
26 Sep - 01 Oct	Delta
24 Sep - 04 Oct	Delta
29 Sep - 05 Oct	Delta
23 Sep - 02 Oct	Delta
20 Sep - 04 Oct	Vueling Airlines
26 Sep - 04 Oct	Delta

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 $499

Return flights