AirHint found the following cheapest return flights from Chicago (ORD) to Sofia (SOF) in January 2026 (see full year).
Return flights
| 26 Jan - 11 Feb | Lufthansa | ||
| 20 Jan - 27 Jan | Turkish Airlines | ||
| 22 Jan - 22 Feb | Turkish Airlines | ||
| 23 Jan - 22 Feb | Turkish Airlines | ||
| 24 Jan - 30 Jan | Lufthansa | ||
| 17 Jan - 25 Jan | Lufthansa |
Also check the deals for one-way flights from Chicago to Sofia in January.
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