AirHint found the following cheapest one-way flights from Chicago (ORD) to Oslo (OSL) in December 2025 (see full year).
One-Way flights
| 03 Dec | Frontier Airlines | ||
| 05 Dec | TAP | ||
| 04 Dec | Frontier Airlines | ||
| 15 Dec | Frontier Airlines | ||
| 16 Dec | Spirit Airlines | ||
| 17 Dec | Frontier Airlines | ||
| 18 Dec | Delta | ||
| 21 Dec | Delta | ||
| 20 Dec | Delta | ||
| 19 Dec | Delta |
Also check the deals for return flights from Chicago to Oslo in December.
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