Earn point on your loyalty program!arrow arc left

Cheap flights from Chicago (CHI) to Sofia (SOF)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from Chicago (CHI) to Sofia (SOF)

How to find the cheapest flight from Chicago (CHI) to Sofia (SOF)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Chicago (CHI) to Sofia (SOF)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Chicago (CHI) to Sofia (SOF)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.

Cheap flights from Chicago to Sofia in May , June 2026

18 May - 17 Jun $ 938.00
CHI
Chicago
United Airlines
1 STOPS
SOF
Sofia
SOF
Sofia
United Airlines
1 STOPS
CHI
Chicago
Pick dates
18 May - 17 Jun $ 938.00
CHI
Chicago
United Airlines
1 STOPS
SOF
Sofia
SOF
Sofia
United Airlines
1 STOPS
CHI
Chicago
Pick dates
20 May - 08 Jun $ 1,409.00
CHI
Chicago
LOT Polish Airlines
1 STOPS
SOF
Sofia
SOF
Sofia
LOT Polish Airlines
1 STOPS
CHI
Chicago
Pick dates

Last minute flights from Chicago to Sofia

18 May - 01 Jun $ 955.00
CHI
Chicago
United Airlines
1 STOPS
SOF
Sofia
SOF
Sofia
United Airlines
1 STOPS
CHI
Chicago
Pick dates
18 May - 31 May $ 971.00
CHI
Chicago
United Airlines
1 STOPS
SOF
Sofia
SOF
Sofia
United Airlines
1 STOPS
CHI
Chicago
Pick dates
19 May - 31 May $ 1,734.00
CHI
Chicago
LOT Polish Airlines
1 STOPS
SOF
Sofia
SOF
Sofia
LOT Polish Airlines
1 STOPS
CHI
Chicago
Pick dates

One-way flights to Sofia from Chicago

1:18 PM - 9:15 AM
United Airlines
2 Stops
14h 52m
CHI - SOF
$ 644
Kiwi
Pick dates
4:20 PM - 9:10 AM
Austrian Airlines
1 Stops
11h 20m
CHI - SOF
$ 656
Kiwi
Pick dates
2:20 PM - 7:05 AM
Swiss International Air Lines
1 Stops
12h
CHI - SOF
$ 673
Kiwi
Pick dates

How to find the cheapest flight from Chicago (CHI) to Sofia (SOF)

Related info for your journey
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Chicago (CHI) to Sofia (SOF)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Chicago (CHI) to Sofia (SOF)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.