Cheapest return flights from Oslo to Porto in September from 184€

Best time to book flights for Oslo (OSL) to Porto (OPO) flights at AirHint

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

Return flights

08 Sep - 12 Sep easyJet
12 Sep - 17 Sep easyJet
05 Sep - 09 Sep easyJet
15 Sep - 24 Sep Vueling Airlines
03 Sep - 12 Sep Ryanair
11 Sep - 16 Sep SWISS
15 Sep - 17 Sep Vueling Airlines
15 Sep - 01 Oct Vueling Airlines
05 Sep - 10 Sep easyJet
25 Sep - 28 Sep Norwegian
22 Sep - 24 Sep Vueling Airlines
22 Sep - 01 Oct Vueling Airlines
29 Sep - 17 Oct Norwegian direct
29 Sep - 01 Oct Norwegian direct
22 Sep - 01 Oct Norwegian direct
22 Sep - 08 Oct Vueling Airlines
22 Sep - 10 Oct Vueling Airlines
29 Sep - 20 Oct Norwegian
29 Sep - 08 Oct Norwegian direct
29 Sep - 10 Oct Norwegian direct

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

Skyscanner

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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