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

Return flights

30 Mar - 08 Apr	Norwegian
30 Mar - 18 Apr	Norwegian
30 Mar - 13 Apr	Norwegian	direct
25 Mar - 08 Apr	Vueling Airlines
13 Mar - 16 Mar	Vueling Airlines
30 Mar - 03 Apr	Norwegian
30 Mar - 06 Apr	Norwegian
14 Mar - 21 Mar	KLM
11 Mar - 17 Mar	KLM
30 Mar - 06 Apr	Norwegian	direct
30 Mar - 08 Apr	Norwegian	direct
25 Mar - 13 Apr	Vueling Airlines
08 Mar - 17 Mar	KLM
25 Mar - 30 Mar	TAP
30 Mar - 20 Apr	Norwegian	direct
28 Mar - 31 Mar	Ryanair
21 Mar - 28 Mar	Lufthansa
25 Mar - 30 Mar	Norwegian	direct

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 124€

Return flights