Cheapest return flights from Basel to Oslo in September from $132

AirHint found the following cheapest return flights from Basel (BSL) to Oslo (OSL) in September 2026 (see full year).

Return flights

17 Sep - 20 Sep Norwegian direct
20 Sep - 11 Oct Norwegian direct
17 Sep - 24 Sep Norwegian direct
10 Sep - 20 Sep Norwegian direct
20 Sep - 24 Sep Norwegian direct
10 Sep - 13 Sep Norwegian direct
10 Sep - 24 Sep Norwegian direct
17 Sep - 08 Oct Norwegian direct
20 Sep - 08 Oct Norwegian direct
11 Sep - 20 Sep Norwegian Air Sweden AOC
21 Sep - 11 Oct Norwegian Air Sweden AOC
11 Sep - 13 Sep Norwegian Air Sweden AOC
11 Sep - 24 Sep Norwegian Air Sweden AOC
21 Sep - 24 Sep Norwegian Air Sweden AOC
21 Sep - 08 Oct Norwegian Air Sweden AOC

Also check the deals for one-way flights from Basel to Oslo in September.

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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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