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

Return flights

13 Nov - 27 Nov	Turkish Airlines
12 Nov - 19 Nov	United
18 Nov - 25 Nov	United
04 Nov - 11 Nov	United
09 Nov - 16 Nov	United
17 Nov - 24 Nov	United
03 Nov - 10 Nov	United
06 Nov - 13 Nov	United
27 Nov - 04 Dec	United
10 Nov - 17 Nov	United
13 Nov - 20 Nov	United
28 Nov - 05 Dec	United
10 Nov - 06 Dec	Lufthansa

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

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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Cheapest return flights from Chicago to Sofia in November from 479€

Return flights