AirHint found the following cheapest return flights from Porto (OPO) to Oslo (OSL) in March 2026 (see full year).

Return flights

30 Mar - 06 Apr	Norwegian
30 Mar - 08 Apr	Norwegian
25 Mar - 08 Apr	Norwegian
11 Mar - 15 Mar	Ryanair
25 Mar - 06 Apr	Norwegian
11 Mar - 08 Apr	Ryanair
30 Mar - 15 Apr	Norwegian
25 Mar - 13 Apr	Norwegian
04 Mar - 08 Mar	Ryanair
24 Mar - 08 Apr	Ryanair
18 Mar - 08 Apr	Ryanair
13 Mar - 18 Mar	Ryanair
05 Mar - 09 Mar	Ryanair
13 Mar - 16 Mar	Ryanair
20 Mar - 08 Apr	easyJet
05 Mar - 10 Mar	Ryanair
06 Mar - 22 Mar	easyJet
10 Mar - 17 Mar	Ryanair
19 Mar - 22 Mar	Ryanair
07 Mar - 11 Mar	Ryanair

Also check the deals for one-way flights from Porto to Oslo in March.

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 Porto to Oslo in March from $127

Return flights