Cheapest return flights from Chicago (ORD) to Sofia (SOF), September

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
02 Sep 29 Sep Icelandair
27 Sep 19 Oct jetBlue
15 Sep 25 Sep Porter Airlines (Canada) Ltd
01 Sep 30 Sep jetBlue
21 Sep 26 Oct Icelandair
06 Sep 11 Oct Porter Airlines (Canada) Ltd
28 Sep 19 Oct Icelandair
28 Sep 18 Oct Icelandair
06 Sep 02 Oct Porter Airlines (Canada) Ltd
06 Sep 03 Oct Porter Airlines (Canada) Ltd
06 Sep 05 Oct Porter Airlines (Canada) Ltd
19 Sep 13 Oct Icelandair
06 Sep 30 Sep Porter Airlines (Canada) Ltd
06 Sep 04 Oct Porter Airlines (Canada) Ltd
14 Sep 25 Sep Icelandair
05 Sep 10 Sep Icelandair
05 Sep 29 Sep Icelandair
01 Sep 29 Sep jetBlue
03 Sep 29 Sep Porter Airlines (Canada) Ltd
06 Sep 29 Sep Porter Airlines (Canada) Ltd
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deals for one-way flights from Chicago to Sofia in September.

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Updated Jul 5, 2026.

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