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

Return flights

04 Sep - 15 Sep	Norwegian
10 Sep - 17 Sep	Ryanair
17 Sep - 22 Sep	Ryanair
16 Sep - 22 Sep	Ryanair
19 Sep - 22 Sep	Norwegian
06 Sep - 09 Sep	Iberia
04 Sep - 08 Sep	Norwegian
05 Sep - 09 Sep	Norwegian
04 Sep - 09 Sep	Norwegian
18 Sep - 23 Sep	Norwegian
30 Sep - 07 Oct	Ryanair
05 Sep - 05 Oct	Norwegian
26 Sep - 05 Oct	Ryanair
27 Sep - 02 Oct	Ryanair
26 Sep - 04 Oct	Ryanair
19 Sep - 10 Oct	Norwegian	direct
29 Sep - 05 Oct	Ryanair
19 Sep - 05 Oct	Norwegian	direct
18 Sep - 05 Oct	Norwegian	direct
19 Sep - 03 Oct	Norwegian	direct

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 $151

Return flights