AirHint found the following cheapest return flights from Bilbao (BIO) to Oslo (OSL) in September 2026 (see full year).
Return flights
| 04 Sep - 12 Sep | Air Europa | ||
| 19 Sep - 23 Sep | Air Europa | ||
| 19 Sep - 10 Oct | Norwegian | direct | |
| 19 Sep - 23 Sep | Norwegian | direct |
Also check the deals for one-way flights from Bilbao to Oslo in September.
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