AirHint found the following cheapest return flights from Madrid (MAD) to Oslo (OSL) in September 2025 (see full year).

Return flights

25 Sep - 12 Oct	Norwegian	direct
25 Sep - 13 Oct	Norwegian	direct
27 Sep - 06 Oct	Air Europa
26 Sep - 12 Oct	Norwegian	direct
26 Sep - 13 Oct	Norwegian	direct
18 Sep - 22 Sep	Air Europa
27 Sep - 05 Oct	Iberia
18 Sep - 23 Sep	Air Europa
26 Sep - 04 Oct	Air Serbia
25 Sep - 29 Sep	Ryanair
25 Sep - 10 Oct	Norwegian	direct
20 Sep - 04 Oct	Air Europa
25 Sep - 04 Oct	Iberia
27 Sep - 30 Sep	Iberia
23 Sep - 30 Sep	Air France
18 Sep - 21 Sep	Wizz Air Malta
24 Sep - 26 Sep	Ryanair
19 Sep - 23 Sep	Wizz Air
20 Sep - 24 Sep	Iberia
19 Sep - 21 Sep	Wizz Air

Also check the deals for one-way flights from Madrid to Oslo 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 Madrid to Oslo in September from 150€

Return flights