Cheapest return flights from Oslo to Porto in May from $187

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

Return flights

25 May - 29 May TAP
11 May - 20 May Norwegian direct
25 May - 12 Jun Norwegian Air Sweden AOC
25 May - 12 Jun Norwegian direct
14 May - 21 May TAP
25 May - 05 Jun Norwegian Air Sweden AOC
11 May - 29 May Norwegian direct
25 May - 05 Jun Norwegian direct
11 May - 13 May Norwegian direct
08 May - 11 May Scandinavian Airlines
15 May - 20 May Norwegian direct
04 May - 20 May Norwegian direct
01 May - 20 May Norwegian direct
15 May - 29 May Norwegian direct
25 May - 08 Jun Norwegian Air Sweden AOC
22 May - 05 Jun Norwegian direct
15 May - 03 Jun Norwegian direct
25 May - 08 Jun Norwegian direct
25 May - 03 Jun Norwegian Air Sweden AOC
25 May - 03 Jun Norwegian direct

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

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