AirHint found the following cheapest return flights from Keflavik (KEF) to Porto (OPO) in March 2026 (see full year).
Return flights
| 12 Mar - 17 Mar | Jet2 | ||
| 05 Mar - 12 Mar | Wizz Air | ||
| 15 Mar - 17 Mar | Icelandair | ||
| 31 Mar - 08 Apr | easyJet | ||
| 31 Mar - 07 Apr | easyJet | ||
| 31 Mar - 10 Apr | easyJet | ||
| 29 Mar - 09 Apr | Wizz Air |
Also check the deals for one-way flights from Keflavik to Porto in March.
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