AirHint found the following cheapest return flights from Frankfurt (FRA) to Oslo (OSL) in March 2026 (see full year).
Return flights
| 16 Mar - 20 Mar | Ryanair | ||
| 28 Mar - 05 Apr | KLM | ||
| 30 Mar - 03 Apr | Ryanair | ||
| 19 Mar - 26 Mar | Lufthansa | direct | |
| 06 Mar - 08 Mar | Lufthansa | direct | |
| 28 Mar - 05 Apr | Lufthansa | direct | |
| 16 Mar - 20 Mar | Lufthansa | direct |
Also check the deals for one-way flights from Frankfurt to Oslo in March.
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