Cheapest return flights from Chicago to Sofia in December from 501€

AirHint found the following cheapest return flights from Chicago (ORD) to Sofia (SOF) in December 2025 (see full year).

Return flights

09 Dec - 16 Dec United
31 Dec - 14 Jan SWISS
01 Dec - 15 Dec Lufthansa
28 Dec - 11 Jan Lufthansa
22 Dec - 12 Jan Lufthansa
29 Dec - 05 Jan United
19 Dec - 26 Dec United
19 Dec - 04 Jan Austrian Airlines

Also check the deals for one-way flights from Chicago to Sofia in December.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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