$329+ Cheap flights from Chicago (CHI) to Sofia (SOF)
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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SOF
Sep 18 — Sep 251
Round-trip
1 adult, Economy
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Find cheap flights from Chicago to Sofia with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Chicago to SofiaExplore the most affordable flight options available from Chicago to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 19, 2026.
Explore the most affordable flight options available from Chicago to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 19, 2026.
This United Airlines deal was found by Cheapflights users on 8/18. 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 12/288:52 am -
2 stops20h 23m
Tue 1/126:00 am -
1 stop16h 10m
Deal found 8/18![United Airlines logo]()
$731
This Justfly.com deal was found by Cheapflights users on 8/16. 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.
Sun 9/138:10 pm -
1 stop34h 50m
Mon 11/94:00 pm -
1 stop26h 00m
Deal found 8/16![Turkish Airlines logo]()
$733
This FlightHub deal was found by Cheapflights users on 8/16. 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 9/238:10 pm -
1 stop28h 35m
Thu 10/89:10 pm -
1 stop20h 30m
Deal found 8/16![Turkish Airlines logo]()
$735
This oojo deal was found by Cheapflights users on 8/14. 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.
Sun 10/49:50 pm -
1 stop12h 10m
Fri 2/262:35 pm -
1 stop13h 20m
Deal found 8/14![LOT logo]()
$736
This United Airlines deal was found by Cheapflights users on 8/18. 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 12/2811:09 am -
2 stops18h 06m
Wed 1/136:25 am -
2 stops17h 13m
Deal found 8/18![United Airlines logo]()
$737
This United Airlines deal was found by Cheapflights users on 8/18. 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 12/2711:09 am -
2 stops18h 06m
Tue 1/126:00 am -
2 stops19h 43m
Deal found 8/18![United Airlines logo]()
$739
This Turkish Airlines deal was found by Cheapflights users on 8/17. 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.
Sun 9/138:10 pm -
1 stop28h 35m
Tue 10/279:40 am -
1 stop32h 20m
Deal found 8/17![Turkish Airlines logo]()
$740
This Gotogate deal was found by Cheapflights users on 8/14. 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.
Mon 9/288:10 pm -
1 stop28h 35m
Mon 10/59:10 pm -
1 stop20h 30m
Deal found 8/14![Turkish Airlines logo]()
$741
This United deal was found by Cheapflights users on 8/18. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/269:35 pm -
2 stops31h 40m
Mon 1/113:00 pm -
1 stop33h 15m
Deal found 8/18![Multiple Airlines logo]()
$742
This Justfly.com deal was found by Cheapflights users on 8/16. 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.
Tue 10/1311:25 am -
1 stop19h 35m
Mon 10/193:50 pm -
1 stop25h 50m
Deal found 8/16![Turkish Airlines logo]()
$743
This United Airlines deal was found by Cheapflights users on 8/18. 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 12/294:20 pm -
1 stop13h 05m
Mon 1/112:00 pm -
1 stop32h 10m
Deal found 8/18![United Airlines logo]()
$749
This Condor deal was found by Cheapflights users on 8/17. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/78:15 am -
2 stops25h 45m
Fri 9/116:20 am -
2 stops23h 40m
Deal found 8/17![Multiple Airlines logo]()
$1,230
Best flights from Chicago to SofiaDiscover carefully curated flight deals from Chicago to Sofia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 19, 2026.
Discover carefully curated flight deals from Chicago to Sofia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 19, 2026.
This Turkish Airlines deal was found by Cheapflights users on 8/14. 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.
Mon 11/212:45 pm -
1 stop18h 25m
Mon 11/234:00 pm -
1 stop34h 20m
Deal found 8/14![Turkish Airlines logo]()
$740
This United Airlines deal was found by Cheapflights users on 8/17. 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 2/1010:00 am -
2 stops19h 15m
Mon 2/222:00 pm -
1 stop32h 10m
Deal found 8/17![United Airlines logo]()
$741
This Condor deal was found by Cheapflights users on 8/17. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/78:15 am -
2 stops25h 45m
Fri 9/116:20 am -
2 stops23h 40m
Deal found 8/17![Multiple Airlines logo]()
$1,230
This Turkish Airlines deal was found by Cheapflights users on 8/18. 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.
Sun 10/118:10 pm -
1 stop34h 50m
Tue 10/203:50 pm -
1 stop25h 50m
Deal found 8/18![Turkish Airlines logo]()
$750
This United Airlines deal was found by Cheapflights users on 8/17. 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 2/76:00 pm -
1 stop11h 15m
Sun 2/216:00 am -
1 stop16h 10m
Deal found 8/17![United Airlines logo]()
$776
This United Airlines deal was found by Cheapflights users on 8/17. 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 2/86:00 pm -
1 stop11h 15m
Sun 2/216:00 am -
1 stop16h 10m
Deal found 8/17![United Airlines logo]()
$776
This Turkish Airlines deal was found by Cheapflights users on 8/16. 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.
Sun 10/411:25 am -
1 stop19h 35m
Tue 10/139:10 pm -
1 stop20h 30m
Deal found 8/16![Turkish Airlines logo]()
$781
This United Airlines deal was found by Cheapflights users on 8/17. 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.
Sat 2/136:00 pm -
1 stop11h 15m
Fri 2/266:00 am -
1 stop16h 10m
Deal found 8/17![United Airlines logo]()
$776
This Turkish Airlines deal was found by Cheapflights users on 8/16. 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.
Sat 10/38:10 pm -
1 stop16h 10m
Wed 10/149:10 pm -
1 stop20h 30m
Deal found 8/16![Turkish Airlines logo]()
$805
This United Airlines deal was found by Cheapflights users on 8/17. 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 2/76:00 pm -
1 stop11h 15m
Sat 2/276:00 am -
1 stop20h 25m
Deal found 8/17![United Airlines logo]()
$776
This Turkish Airlines deal was found by Cheapflights users on 8/14. 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.
Fri 9/258:10 pm -
1 stop32h 05m
Sun 10/111:05 pm -
1 stop28h 35m
Deal found 8/14![Turkish Airlines logo]()
$810
This United Airlines deal was found by Cheapflights users on 8/19. 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 11/1111:56 am -
2 stops17h 19m
Thu 4/16:20 am -
1 stop14h 35m
Deal found 8/19![United Airlines logo]()
$784
This United Airlines deal was found by Cheapflights users on 8/14. 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 12/1411:15 am -
2 stops18h 00m
Mon 1/112:00 pm -
1 stop32h 10m
Deal found 8/14![United Airlines logo]()
$794
Last-minute flights from Chicago to SofiaDiscover last-minute flight deals from Chicago to Sofia. Data last updated August 19, 2026 and is based on user searches.
Discover last-minute flight deals from Chicago to Sofia. Data last updated August 19, 2026 and is based on user searches.
This Condor deal was found by Cheapflights users on 8/17. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/78:15 am -
2 stops25h 45m
Fri 9/116:20 am -
2 stops23h 40m
Deal found 8/17![Multiple Airlines logo]()
$1,230
This FlightHub deal was found by Cheapflights users on 8/17. 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 9/138:10 pm -
1 stop34h 50m
Mon 11/94:00 pm -
1 stop26h 00m
Deal found 8/17![Turkish Airlines logo]()
$733
This Turkish Airlines deal was found by Cheapflights users on 8/17. 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.
Sun 9/138:10 pm -
1 stop28h 35m
Tue 10/279:40 am -
1 stop32h 20m
Deal found 8/17![Turkish Airlines logo]()
$740
This Turkish Airlines deal was found by Cheapflights users on 8/17. 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.
Mon 9/1411:25 am -
1 stop19h 35m
Fri 10/3011:55 am -
1 stop30h 05m
Deal found 8/17![Turkish Airlines logo]()
$751
This Justfly.com deal was found by Cheapflights users on 8/17. 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.
Mon 9/149:50 pm -
1 stop12h 10m
Fri 11/132:35 pm -
1 stop13h 20m
Deal found 8/17![LOT logo]()
$755
This FlightHub deal was found by Cheapflights users on 8/15. 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 9/168:10 pm -
1 stop34h 50m
Wed 9/303:50 pm -
1 stop25h 50m
Deal found 8/15![Turkish Airlines logo]()
$758
This FlightHub deal was found by Cheapflights users on 8/16. 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 9/208:10 pm -
1 stop34h 50m
Sun 10/181:05 pm -
1 stop28h 35m
Deal found 8/16![Turkish Airlines logo]()
$753
This FlightHub deal was found by Cheapflights users on 8/16. 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 9/238:10 pm -
1 stop28h 35m
Thu 10/89:10 pm -
1 stop20h 30m
Deal found 8/16![Turkish Airlines logo]()
$735
This FlightHub deal was found by Cheapflights users on 8/16. 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.
Thu 9/248:10 pm -
1 stop34h 50m
Mon 10/53:50 pm -
1 stop25h 50m
Deal found 8/16![Turkish Airlines logo]()
$757
This Turkish Airlines deal was found by Cheapflights users on 8/17. 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.
Sun 9/278:10 pm -
1 stop28h 35m
Tue 11/104:00 pm -
1 stop26h 00m
Deal found 8/17![Turkish Airlines logo]()
$750
This Turkish Airlines deal was found by Cheapflights users on 8/18. 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.
Sun 9/2711:25 am -
1 stop24h 55m
Sat 10/319:45 pm -
1 stop21h 15m
Deal found 8/18![Turkish Airlines logo]()
$760
This Gotogate deal was found by Cheapflights users on 8/14. 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.
Mon 9/288:10 pm -
1 stop28h 35m
Mon 10/59:35 am -
1 stop32h 05m
Deal found 8/14![Turkish Airlines logo]()
$741
One-way flights from Chicago to SofiaSearch for one-way flight options from Chicago to Sofia. Find affordable one-way fares based on user searches. Data last updated August 19, 2026.
Search for one-way flight options from Chicago to Sofia. Find affordable one-way fares based on user searches. Data last updated August 19, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/293:50 pm -
3 stops58h 40m
Deal found 8/16![Multiple Airlines logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/2911:45 am -
3 stops52h 55m
Deal found 8/16![Multiple Airlines logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 8/17. 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.
Sat 8/2910:25 pm -
3 stops57h 55m
Deal found 8/17![Multiple Airlines logo]()
$351
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 9/157:25 pm -
2 stops44h 55m
Deal found 8/17![Multiple Airlines logo]()
$353
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 9/147:25 pm -
3 stops34h 25m
Deal found 8/17![Multiple Airlines logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 8/17. 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.
Thu 9/176:20 am -
3 stops56h 50m
Deal found 8/17![Multiple Airlines logo]()
$381
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 9/1610:25 pm -
3 stops42h 50m
Deal found 8/17![Multiple Airlines logo]()
$384
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Thu 9/247:25 pm -
3 stops45h 45m
Deal found 8/16![Multiple Airlines logo]()
$388
This FlightHub deal was found by Cheapflights users on 8/16. 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.
Thu 9/248:10 pm -
1 stop34h 50m
Deal found 8/16![Turkish Airlines logo]()
$392
This Booking.com deal was found by Cheapflights users on 8/17. 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.
Mon 9/1411:25 am -
1 stop19h 35m
Deal found 8/17![Turkish Airlines logo]()
$397
This CheapOair deal was found by Cheapflights users on 8/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:10 pm -
1 stop34h 50m
Deal found 8/17![Turkish Airlines logo]()
$421
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Thu 9/243:20 pm -
3 stops47h 50m
Deal found 8/16![Multiple Airlines logo]()
$549
Find flight deals from Chicago to Sofia
Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Sofia (SOF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $731 (United Airlines) |
One-way from | $329 (Kiwi.com) |
Popular in | July |
Cheapest in | February |
Average price | $824 |
Cheapflights Fare Finder
Customize your flight search to find flights from Chicago to Sofia 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 August 19, 2026.
Use the filters below to find and compare flights from Chicago to Sofia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoSofia
ORD Chicago O'Hare Intl - SOF Sofia
ORDSOF
Chicago O'Hare Intl
Mon 11/2
12:45 pm-3:10 pm
1 stop18h 25m
Sofia
Mon 11/23
4:00 pm-6:20 pm
1 stop34h 20m
$740
ChicagoSofia
ORD Chicago O'Hare Intl - SOF Sofia
ORDSOF
Chicago O'Hare Intl
Wed 2/10
10:00 am-1:15 pm
2 stops19h 15m
Sofia
Mon 2/22
2:00 pm-2:10 pm
1 stop32h 10m
$741
ChicagoSofia
ORD Chicago O'Hare Intl - SOF Sofia
ORDSOF
Chicago O'Hare Intl
Sun 10/11
8:10 pm-3:00 pm
1 stop34h 50m
Sofia
Tue 10/20
3:50 pm-9:40 am
1 stop25h 50m
$750
Quickest round-trip
ChicagoSofia
ORD Chicago O'Hare Intl - SOF Sofia
ORDSOF
Chicago O'Hare Intl
Sun 2/7
6:00 pm-1:15 pm
1 stop11h 15m
Sofia
Sun 2/21
6:00 am-2:10 pm
1 stop16h 10m
$776
ChicagoSofia
ORD Chicago O'Hare Intl - SOF Sofia
ORDSOF
Chicago O'Hare Intl
Mon 2/8
6:00 pm-1:15 pm
1 stop11h 15m
Sofia
Sun 2/21
6:00 am-2:10 pm
1 stop16h 10m
$776
ChicagoSofia
ORD Chicago O'Hare Intl - SOF Sofia
ORDSOF
Chicago O'Hare Intl
Sat 2/13
6:00 pm-1:15 pm
1 stop11h 15m
Sofia
Fri 2/26
6:00 am-2:10 pm
1 stop16h 10m
$776
ChicagoSofia
ORD Chicago O'Hare Intl - SOF Sofia
ORDSOF
Chicago O'Hare Intl
Sun 2/7
6:00 pm-1:15 pm
1 stop11h 15m
Sofia
Sat 2/27
6:00 am-6:25 pm
1 stop20h 25m
$776
ChicagoSofia
ORD Chicago O'Hare Intl - SOF Sofia
ORDSOF
Chicago O'Hare Intl
Sun 10/4
11:25 am-3:00 pm
1 stop19h 35m
Sofia
Tue 10/13
9:10 pm-9:40 am
1 stop20h 30m
$781
ChicagoSofia
ORD Chicago O'Hare Intl - SOF Sofia
ORDSOF
Chicago O'Hare Intl
Wed 11/11
11:56 am-1:15 pm
2 stops17h 19m
Sofia
Thu 4/1
6:20 am-12:55 pm
1 stop14h 35m
$784
ChicagoSofia
ORD Chicago O'Hare Intl - SOF Sofia
ORDSOF
Chicago O'Hare Intl
Mon 12/14
11:15 am-1:15 pm
2 stops18h 00m
Sofia
Mon 1/11
2:00 pm-2:10 pm
1 stop32h 10m
$794
Showing 1-10 of 31 resultsSorted by cheapest first
Compare providers for flights from Chicago to Sofia
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Chicago to Sofia in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Chicago-Sofia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago-Sofia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago-Sofia flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Chicago-Sofia flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago-Sofia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Chicago to Sofia
Have a flexible travel schedule? Discover the best time to fly to Sofia from Chicago with our price prediction graph.
CHI-SOF
ORD-SOF
MDW-SOF
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 Chicago to Sofia
CHI-SOF
ORD-SOF
MDW-SOF
What is the cheapest month to book a flight from Chicago to Sofia?
Currently, February is the cheapest month in which you can book a flight from Chicago to Sofia (average of $593). Flying from Chicago to Sofia in June is currently the most expensive (average of $1,154). 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.
How much does it cost to fly round-trip from Chicago to Sofia?
Airfare is typical for this route at the moment.
Chicago to Sofia flights typically cost between $721 and $907 in December.The cheapest round-trip price found within the last 5 days was $731 on United Airlines (Dec 28-Jan 12).
What’s the top layover airport for flights from Chicago to Sofia?
Share of 1-stop round-trip flights from Chicago to Sofia chosen by Cheapflights users in the past 12 months, using the same layover each way.
Frankfurt am Main (FRA) – chosen by Cheapflights users on 40% of 1-stop itineraries from Chicago to Sofia on Cheapflights.
What’s the cheapest layover airport for flights from Chicago to Sofia?
Average round-trip fare for 1-stop flights from Chicago to Sofia, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Warsaw (WAW) is the most affordable 1-stop option, with an average round-trip price of $478.
What’s the fastest layover option from Chicago to Sofia?
Shortest average travel time for 1-stop one-way flights from Chicago to Sofia, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Zurich (ZRH) have the shortest average one-way travel time for 1-stop routes: 11h 40m.
Which airport typically offers the quickest layover for flights from Chicago to Sofia?
Average layover duration for 1-stop one-way flights from Chicago to Sofia, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Zurich (ZRH) offer the fastest connection on this route, with an average layover time of 0h 48m.
How far ahead should I book a flight from Chicago to Sofia?
The price you pay for your flight from Chicago to Sofia may vary depending on when you book. For the best chance of a lower fare, look to book 41 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Reviews of airlines servicing Sofia
Get insights into the airlines that provide service to Sofia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sofia. Reviews last updated August 19, 2026.
Read reviews from past customers who have flown LOT,SWISS, andTurkish Airlines from Chicago to Sofia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
6.9
Crew
8.2
Food
7.2
Comfort
7.5
Overall
7.5
Boarding
7.5
Reviews
1 / 20
10.0
ExcellentRami,Sep 2025
LAX - WAW
Entertainment
6.9
Crew
8.2
Food
7.2
Comfort
7.5
Overall
7.5
Boarding
7.5
Reviews
1 / 20
10.0
ExcellentRami,Sep 2025
LAX - WAW
Entertainment
6.9
Crew
8.2
Food
7.2
Comfort
7.5
Overall
7.5
Boarding
7.5
Reviews
1 / 20
10.0
ExcellentRami,Sep 2025
LAX - WAW
Entertainment
6.9
Crew
8.2
Food
7.2
Comfort
7.5
Overall
7.5
Boarding
7.5
Reviews
1 / 20
10.0
ExcellentRami,Sep 2025
LAX - WAW
Entertainment
6.9
Crew
8.2
Food
7.2
Comfort
7.5
Overall
7.5
Boarding
7.5
Reviews
1 / 20
10.0
ExcellentRami,Sep 2025
LAX - WAW
Entertainment
6.9
Crew
8.2
Food
7.2
Comfort
7.5
Overall
7.5
Boarding
7.5
Reviews
1 / 20
10.0
ExcellentRami,Sep 2025
LAX - WAW
Related info for your journey
Find useful and relevant information for your journey from Chicago to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Chicago and Sofia flights
Browse other Chicago and Sofia flight options. Last updated on August 19, 2026.
Other flights from Chicago
Browse through other flights departing from Chicago. Flights are based on user searches made on Cheapflights and were last updated on August 19, 2026.
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Other flights to Sofia
Explore flights to Sofia departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 19, 2026.
Top 10 airlines flying from Chicago to Sofia
Discover the top 10 airlines that operate flights from Chicago to Sofia. 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 August 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$524 | Average$710 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$583 | Average$986 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$585 | Average$870 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$594 | Average$838 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$607 | Average$959 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$608 | Average$1,047 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$609 | Average$649 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$614 | Average$816 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$701 | Average$943 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$703 | Average$870 | FlexibilityNo cancel fee | On-timeN/A |