AirHint found the following cheapest return flights from Basel (BSL) to Oslo (OSL) in April 2026 (see full year).
Return flights
| 09 Apr - 13 Apr | KLM | ||
| 09 Apr - 14 Apr | KLM | ||
| 10 Apr - 14 Apr | KLM | ||
| 10 Apr - 17 Apr | easyJet |
Also check the deals for one-way flights from Basel to Oslo in April.
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