$272+ Cheap flights from Illinois to Bulgaria
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/17. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SOF
Mar 9 — Mar 161
1 adult, Economy
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Cheapest flights from Illinois to BulgariaExplore the most affordable flight options available from Illinois to Bulgaria. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 7, 2026.
Explore the most affordable flight options available from Illinois to Bulgaria. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1811:28 am
STL
- SOF
2 stops17h 22m
Multiple Airlines
Fri 4/176:20 am
SOF
- STL
1 stop15h 05m
Multiple Airlines
Deal found 2/5![Multiple Airlines logo]()
$517
This Justfly.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2511:50 am
ORD
- SOF
1 stop19h 20m
Turkish Airlines
Wed 3/189:40 pm
SOF
- ORD
1 stop20h 25m
Turkish Airlines
Deal found 2/4![Turkish Airlines logo]()
$546
This FlightHub deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/68:10 pm
ORD
- SOF
1 stop28h 35m
Turkish Airlines
Wed 5/133:50 pm
SOF
- ORD
1 stop34h 25m
Turkish Airlines
Deal found 2/6![Turkish Airlines logo]()
$548
This FlightHub deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/118:20 pm
ORD
- SOF
1 stop34h 50m
Turkish Airlines
Fri 2/274:00 pm
SOF
- ORD
1 stop26h 05m
Turkish Airlines
Deal found 2/4![Turkish Airlines logo]()
$549
This oojo deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/68:10 pm
ORD
- SOF
1 stop16h 05m
Turkish Airlines
Wed 4/229:05 pm
SOF
- ORD
1 stop20h 35m
Turkish Airlines
Deal found 2/5![Turkish Airlines logo]()
$552
This oojo deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:20 pm
ORD
- SOF
1 stop28h 25m
Turkish Airlines
Thu 3/59:35 am
SOF
- ORD
1 stop32h 30m
Turkish Airlines
Deal found 2/3![Turkish Airlines logo]()
$553
This FlightHub deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:20 pm
ORD
- SOF
1 stop16h 30m
Turkish Airlines
Wed 4/159:05 pm
SOF
- ORD
1 stop20h 35m
Turkish Airlines
Deal found 2/5![Turkish Airlines logo]()
$559
This oojo deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1712:50 pm
ORD
- SOF
1 stop19h 20m
Turkish Airlines
Thu 4/163:50 pm
SOF
- ORD
1 stop25h 50m
Turkish Airlines
Deal found 2/6![Turkish Airlines logo]()
$561
This FlightHub deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1812:50 pm
ORD
- SOF
1 stop25h 00m
Turkish Airlines
Wed 4/159:35 am
SOF
- ORD
1 stop32h 05m
Turkish Airlines
Deal found 2/6![Turkish Airlines logo]()
$562
This Mytrip deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/108:16 pm
ORD
- SOF
3 stops34h 34m
Multiple Airlines
Tue 3/242:00 pm
SOF
- ORD
2 stops17h 22m
Multiple Airlines
Deal found 2/6![Multiple Airlines logo]()
$569
This Justfly.com deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/111:50 pm
ORD
- SOF
1 stop24h 55m
Turkish Airlines
Sat 9/53:50 pm
SOF
- ORD
1 stop14h 15m
Turkish Airlines
Deal found 2/3![Turkish Airlines logo]()
$570
This Gotogate deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1911:50 pm
ORD
- SOF
1 stop24h 55m
Turkish Airlines
Fri 10/3010:05 am
SOF
- ORD
1 stop16h 20m
Turkish Airlines
Deal found 2/4![Turkish Airlines logo]()
$571
Best flights from Illinois to BulgariaDiscover carefully curated flight deals from Illinois to Bulgaria that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 7, 2026.
Discover carefully curated flight deals from Illinois to Bulgaria that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1811:28 am
STL
- SOF
2 stops17h 22m
Multiple Airlines
Fri 4/176:20 am
SOF
- STL
1 stop15h 05m
Multiple Airlines
Deal found 2/5![Multiple Airlines logo]()
$517
This Expedia deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/184:50 pm
STL
- SOF
1 stop18h 10m
Lufthansa
Fri 4/176:20 am
SOF
- STL
1 stop15h 05m
Lufthansa
Deal found 2/5![Lufthansa logo]()
$642
This Booking.com deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:20 pm
ORD
- VAR
1 stop28h 50m
Turkish Airlines
Sat 2/219:25 pm
VAR
- ORD
1 stop20h 40m
Turkish Airlines
Deal found 2/5![Turkish Airlines logo]()
$648
This Air Serbia deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/111:20 pm
ORD
- SOF
1 stop19h 40m
Air Serbia
Sun 8/304:05 pm
SOF
- ORD
1 stop30h 25m
Air Serbia
Deal found 2/6![Air Serbia logo]()
$667
This KLM deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/61:10 pm
MDW
- SOF
2 stops16h 50m
KLM
Wed 4/227:00 am
SOF
- MDW
2 stops18h 58m
KLM
Deal found 2/5![KLM logo]()
$699
This United Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/39:40 pm
ORD
- SOF
1 stop13h 00m
United Airlines
Fri 8/286:20 am
SOF
- ORD
1 stop14h 35m
United Airlines
Deal found 2/6![United Airlines logo]()
$703
This Air Canada deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1811:25 am
STL
- SOF
3 stops19h 25m
Air Canada
Fri 4/176:20 am
SOF
- STL
2 stops17h 04m
Air Canada
Deal found 2/5![Air Canada logo]()
$762
This Booking.com deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/277:20 pm
STL
- SOF
2 stops40h 00m
British Airways
Wed 7/299:25 pm
SOF
- STL
2 stops32h 09m
British Airways
Deal found 2/6![British Airways logo]()
$1,017
This FlightHub deal was found by Cheapflights users on 2/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/3110:15 pm
ORD
- BOJ
2 stops40h 20m
Aer Lingus
Sat 6/611:20 pm
BOJ
- ORD
2 stops50h 50m
Aer Lingus
Deal found 2/7![Aer Lingus logo]()
$1,177
This Turkish Airlines deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/48:20 pm
ORD
- VAR
1 stop16h 15m
Turkish Airlines
Sun 3/810:00 am
VAR
- ORD
1 stop32h 05m
Turkish Airlines
Deal found 2/3![Turkish Airlines logo]()
$687
This Air Serbia deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/34:40 pm
ORD
- SOF
1 stop14h 55m
Air Serbia
Sun 9/64:05 pm
SOF
- ORD
1 stop30h 25m
Air Serbia
Deal found 2/3![Air Serbia logo]()
$691
This Lufthansa deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/109:40 pm
ORD
- SOF
1 stop13h 00m
Lufthansa
Sat 5/231:55 pm
SOF
- ORD
1 stop14h 00m
Lufthansa
Deal found 2/6![Lufthansa logo]()
$703
This United Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/29:40 pm
ORD
- SOF
1 stop17h 30m
United Airlines
Mon 8/316:10 am
SOF
- ORD
1 stop14h 25m
United Airlines
Deal found 2/6![United Airlines logo]()
$704
This Gurufare deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/204:05 pm
STL
- SOF
2 stops35h 10m
Multiple Airlines
Fri 4/176:20 am
SOF
- STL
2 stops17h 04m
Multiple Airlines
Deal found 2/5![Multiple Airlines logo]()
$757
This Air Serbia deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/34:40 pm
ORD
- SOF
1 stop14h 55m
Air Serbia
Mon 8/315:00 am
SOF
- ORD
1 stop17h 30m
Air Serbia
Deal found 2/6![Air Serbia logo]()
$693
This KLM deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/111:22 pm
MDW
- SOF
2 stops16h 38m
KLM
Fri 5/297:00 am
SOF
- MDW
2 stops19h 14m
KLM
Deal found 2/6![KLM logo]()
$774
This United Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/293:47 pm
ORD
- SOF
2 stops18h 53m
United Airlines
Mon 8/316:10 am
SOF
- ORD
1 stop14h 25m
United Airlines
Deal found 2/6![United Airlines logo]()
$709
This FlightHub deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/14:05 pm
ORD
- VAR
2 stops15h 10m
Lufthansa
Sat 4/119:20 am
VAR
- ORD
1 stop18h 35m
Lufthansa
Deal found 2/6![Lufthansa logo]()
$766
This United Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1111:00 am
ORD
- SOF
2 stops17h 10m
United Airlines
Fri 5/296:20 am
SOF
- ORD
2 stops16h 33m
United Airlines
Deal found 2/6![United Airlines logo]()
$711
This KLM deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/251:23 pm
MDW
- SOF
2 stops16h 37m
KLM
Sat 5/97:00 am
SOF
- MDW
2 stops18h 56m
KLM
Deal found 2/4![KLM logo]()
$800
This Expedia deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/209:55 am
ORD
- VAR
2 stops39h 05m
Multiple Airlines
Wed 8/264:00 pm
VAR
- ORD
1 stop29h 20m
Multiple Airlines
Deal found 2/5![Multiple Airlines logo]()
$840
This United Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/129:50 am
ORD
- SOF
2 stops18h 20m
United Airlines
Thu 5/146:30 am
SOF
- ORD
1 stop21h 25m
United Airlines
Deal found 2/5![United Airlines logo]()
$712
This FlightHub deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/247:25 am
STL
- SOF
2 stops22h 00m
Air Canada
Thu 7/212:55 pm
SOF
- STL
2 stops37h 32m
Air Canada
Deal found 2/5![Air Canada logo]()
$964
This KLM deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/41:10 pm
MDW
- SOF
2 stops16h 50m
KLM
Sun 4/197:00 am
SOF
- MDW
2 stops18h 58m
KLM
Deal found 2/4![KLM logo]()
$800
This United Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/288:55 am
ORD
- SOF
2 stops19h 15m
United Airlines
Thu 9/36:30 am
SOF
- ORD
1 stop14h 25m
United Airlines
Deal found 2/6![United Airlines logo]()
$712
This KAYAK deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/2211:25 am
ORD
- VAR
1 stop13h 20m
Turkish Airlines
Mon 9/283:35 am
VAR
- ORD
1 stop22h 40m
Turkish Airlines
Deal found 2/6![Turkish Airlines logo]()
$974
This FlightHub deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/204:50 pm
STL
- SOF
1 stop22h 55m
Lufthansa
Fri 4/176:20 am
SOF
- STL
1 stop15h 05m
Lufthansa
Deal found 2/5![Lufthansa logo]()
$897
This Air France deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/221:49 pm
MDW
- SOF
2 stops16h 06m
Multiple Airlines
Sun 3/17:00 am
SOF
- MDW
2 stops18h 45m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$916
This United Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/289:50 am
ORD
- SOF
2 stops18h 20m
United Airlines
Wed 9/21:50 pm
SOF
- ORD
1 stop14h 05m
United Airlines
Deal found 2/6![United Airlines logo]()
$712
This KLM deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/51:29 pm
MDW
- SOF
2 stops16h 36m
KLM
Tue 3/177:00 am
SOF
- MDW
2 stops17h 54m
KLM
Deal found 2/6![KLM logo]()
$862
Last-minute flights from Illinois to BulgariaDiscover last-minute flight deals from Illinois to Bulgaria. Data last updated February 7, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Bulgaria. Data last updated February 7, 2026 and is based on user searches.
This FlightHub deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/118:20 pm
ORD
- SOF
1 stop34h 50m
Turkish Airlines
Fri 2/274:00 pm
SOF
- ORD
1 stop26h 05m
Turkish Airlines
Deal found 2/4![Turkish Airlines logo]()
$549
This FlightHub deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/178:20 pm
ORD
- SOF
1 stop28h 25m
Turkish Airlines
Fri 3/204:00 pm
SOF
- ORD
1 stop26h 05m
Turkish Airlines
Deal found 2/4![Turkish Airlines logo]()
$573
This oojo deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:20 pm
ORD
- SOF
1 stop28h 25m
Turkish Airlines
Thu 3/59:35 am
SOF
- ORD
1 stop32h 30m
Turkish Airlines
Deal found 2/3![Turkish Airlines logo]()
$553
This FlightHub deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:20 pm
ORD
- SOF
1 stop16h 30m
Turkish Airlines
Wed 4/159:05 pm
SOF
- ORD
1 stop20h 35m
Turkish Airlines
Deal found 2/5![Turkish Airlines logo]()
$559
This Justfly.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2511:50 am
ORD
- SOF
1 stop19h 20m
Turkish Airlines
Wed 3/189:40 pm
SOF
- ORD
1 stop20h 25m
Turkish Airlines
Deal found 2/4![Turkish Airlines logo]()
$546
This oojo deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/311:50 am
ORD
- SOF
1 stop19h 20m
Turkish Airlines
Wed 4/19:35 am
SOF
- ORD
1 stop32h 05m
Turkish Airlines
Deal found 2/4![Turkish Airlines logo]()
$575
This oojo deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/411:50 am
ORD
- SOF
1 stop19h 20m
Turkish Airlines
Wed 3/119:40 pm
SOF
- ORD
1 stop20h 25m
Turkish Airlines
Deal found 2/4![Turkish Airlines logo]()
$574
This Mytrip deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/108:16 pm
ORD
- SOF
3 stops34h 34m
Multiple Airlines
Tue 3/242:00 pm
SOF
- ORD
2 stops17h 22m
Multiple Airlines
Deal found 2/6![Multiple Airlines logo]()
$569
This FlightHub deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/119:20 pm
ORD
- SOF
1 stop16h 30m
Turkish Airlines
Wed 3/259:35 am
SOF
- ORD
1 stop32h 30m
Turkish Airlines
Deal found 2/6![Turkish Airlines logo]()
$548
This oojo deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1712:50 pm
ORD
- SOF
1 stop19h 20m
Turkish Airlines
Thu 4/163:50 pm
SOF
- ORD
1 stop25h 50m
Turkish Airlines
Deal found 2/6![Turkish Airlines logo]()
$561
This Kiwi.com deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1811:28 am
STL
- SOF
2 stops17h 22m
Multiple Airlines
Fri 4/176:20 am
SOF
- STL
1 stop15h 05m
Multiple Airlines
Deal found 2/5![Multiple Airlines logo]()
$517
This FlightHub deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1812:50 pm
ORD
- SOF
1 stop25h 00m
Turkish Airlines
Wed 4/159:35 am
SOF
- ORD
1 stop32h 05m
Turkish Airlines
Deal found 2/6![Turkish Airlines logo]()
$562
One-way flights from Illinois to BulgariaSearch for one-way flight options from Illinois to Bulgaria. Find affordable one-way fares based on user searches. Data last updated February 7, 2026.
Search for one-way flight options from Illinois to Bulgaria. Find affordable one-way fares based on user searches. Data last updated February 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/174:47 pm
ORD
- SOF
3 stops58h 23m
Multiple Airlines
Deal found 2/6![Multiple Airlines logo]()
$272
This Kiwi.com deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:25 pm
ORD
- SOF
3 stops31h 45m
Multiple Airlines
Deal found 2/6![Multiple Airlines logo]()
$275
This Kiwi.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/236:30 pm
ORD
- SOF
3 stops43h 05m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/16:40 am
ORD
- SOF
3 stops45h 10m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:25 pm
ORD
- SOF
2 stops20h 45m
Multiple Airlines
Deal found 2/6![Multiple Airlines logo]()
$280
This Kiwi.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/26:51 pm
ORD
- SOF
3 stops46h 24m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$282
This Kiwi.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/36:30 pm
ORD
- SOF
3 stops45h 05m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:30 pm
ORD
- SOF
3 stops45h 05m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/226:30 pm
ORD
- SOF
3 stops43h 15m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$292
This Kiwi.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:51 pm
ORD
- SOF
2 stops56h 59m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$293
This Mytrip deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/267:25 pm
ORD
- VAR
2 stops14h 35m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$294
This Kiwi.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/47:15 am
MDW
- SOF
3 stops27h 55m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$350
Find flight deals from Illinois to Bulgaria
Keep the following information in mind while searching for Illinois to Bulgaria flight deals. Data was last updated February 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $517 (Kiwi.com) |
One-way from | $272 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $574 |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Bulgaria that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 7, 2026.
Use the filters below to find and compare flights from Illinois to Bulgaria that are best for you.
Fly from
Illinois
Fly to
Bulgaria
Route
Depart
Return
Price
St. LouisSofia
STL - SOF
STLSOF
Lambert-St Louis
Wed 3/18
11:28 am-11:50 am
2 stops17h 22m
Sofia
Fri 4/17
6:20 am-1:25 pm
1 stop15h 05m
$517
St. LouisSofia
STL - SOF
STLSOF
Lambert-St Louis
Wed 3/18
4:50 pm-6:00 pm
1 stop18h 10m
Sofia
Fri 4/17
6:20 am-1:25 pm
1 stop15h 05m
$642
ChicagoVarna
ORD - VAR
ORDVAR
Chicago O'Hare Intl
Wed 2/18
8:20 pm-9:10 am
1 stop28h 50m
Varna
Sat 2/21
9:25 pm-10:05 am
1 stop20h 40m
$648
ChicagoSofia
ORD - SOF
ORDSOF
Chicago O'Hare Intl
Sat 8/1
11:20 pm-3:00 am
1 stop19h 40m
Sofia
Sun 8/30
4:05 pm-2:30 pm
1 stop30h 25m
$667
ChicagoVarna
ORD - VAR
ORDVAR
Chicago O'Hare Intl
Wed 3/4
8:20 pm-8:35 pm
1 stop16h 15m
Varna
Sun 3/8
10:00 am-11:05 am
1 stop32h 05m
$687
ChicagoSofia
ORD - SOF
ORDSOF
Chicago O'Hare Intl
Mon 8/3
4:40 pm-3:35 pm
1 stop14h 55m
Sofia
Sun 9/6
4:05 pm-2:30 pm
1 stop30h 25m
$691
ChicagoSofia
ORD - SOF
ORDSOF
Chicago O'Hare Intl
Mon 8/3
4:40 pm-3:35 pm
1 stop14h 55m
Sofia
Mon 8/31
5:00 am-2:30 pm
1 stop17h 30m
$693
ChicagoSofia
MDW - SOF
MDWSOF
Chicago Midway
Mon 4/6
1:10 pm-2:00 pm
2 stops16h 50m
Sofia
Wed 4/22
7:00 am-5:58 pm
2 stops18h 58m
$699
ChicagoSofia
ORD - SOF
ORDSOF
Chicago O'Hare Intl
Mon 8/3
9:40 pm-6:40 pm
1 stop13h 00m
Sofia
Fri 8/28
6:20 am-12:55 pm
1 stop14h 35m
$703
ChicagoSofia
ORD - SOF
ORDSOF
Chicago O'Hare Intl
Sun 5/10
9:40 pm-6:40 pm
1 stop13h 00m
Sofia
Sat 5/23
1:55 pm-7:55 pm
1 stop14h 00m
$703
Showing 1-10 of 60 results
Best time to book a flight from Illinois to Bulgaria
Have a flexible travel schedule? Discover the best time to fly to Bulgaria from Illinois with our price prediction graph.
STL-SOF
ORD-SOF
ORD-VAR
MDW-SOF
ORD-BOJ
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Illinois to Bulgaria
USIL-BG0
STL-SOF
ORD-SOF
ORD-VAR
MDW-SOF
What is the cheapest month to book a flight from Illinois to Bulgaria?
Currently, November is the cheapest month in which you can book a flight from Illinois to Bulgaria (average of $473). Flying from Illinois to Bulgaria in June is currently the most expensive (average of $826). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Related info for your journey
Find useful and relevant information for your journey from Illinois to Bulgaria. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for Illinois to Bulgaria
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Bulgaria by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to Bulgaria by cabin class
Find flights from Illinois to Bulgaria, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and Bulgaria flights
Browse other Illinois and Bulgaria flight options. Last updated on February 7, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Bulgaria
Find the right flight back to Illinois after your stay in Bulgaria
Illinois to Bulgaria flights
Consider these flights traveling from Illinois to Bulgaria.
Fly to Bulgaria regions
Consider these flights traveling to Bulgaria regions.
Top 10 airlines flying from Illinois to Bulgaria
Discover the top 10 airlines that operate flights from Illinois to Bulgaria. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$469 | Average$641 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$520 | Average$900 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$533 | Average$654 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$566 | Average$779 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$569 | Average$821 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$585 | Average$624 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$586 | Average$873 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$590 | Average$902 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$606 | Average$936 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$611 | Average$749 | FlexibilityNo cancel fee | On-time70% |