Cheapest return flights from Chicago to Sofia in December from $600

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

Return flights

02 Dec - 09 Dec United
07 Dec - 14 Dec United
27 Dec - 13 Jan United
27 Dec - 17 Jan Air Canada
29 Dec - 12 Jan Lufthansa
26 Dec - 09 Jan Lufthansa
12 Dec - 19 Dec United
13 Dec - 14 Dec Spirit Airlines
17 Dec - 24 Dec United
22 Dec - 29 Dec United
19 Dec - 05 Jan Austrian Airlines
27 Dec - 03 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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