Cheapest return flights from Chicago to Sofia in December from $558

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

Return flights

09 Dec - 23 Dec Air Canada
09 Dec - 15 Jan Lufthansa
14 Dec - 18 Jan United
16 Dec - 23 Dec United
07 Dec - 25 Jan United
01 Dec - 08 Dec United
06 Dec - 20 Dec Turkish Airlines
01 Dec - 11 Jan Lufthansa
13 Dec - 17 Jan Air Canada
06 Dec - 13 Dec United
17 Dec - 10 Jan Austrian Airlines
20 Dec - 02 Jan Air Serbia
26 Dec - 02 Jan United

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

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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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