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$309+ Cheap flights from Chicago (CHI) 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SOF
Aug 21 — Aug 281
Fri 8/21
Fri 8/28
1 adult, Economy
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Cheap flight deals from Chicago to Bulgaria

Cheapest flights from Chicago to Bulgaria
Explore the most affordable flight options available from Chicago to Bulgaria. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 22, 2026.

This Gotogate deal was found by Cheapflights users on 7/18. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/78:10 pm
ORD
-
VAR
1 stop28h 20m
Turkish Airlines
Mon 9/2110:10 pm
VAR
-
ORD
1 stop19h 30m
Turkish Airlines
Deal found 7/18$651
This KAYAK deal was found by Cheapflights users on 7/22. 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.
Tue 9/88:10 pm
ORD
-
VAR
1 stop17h 10m
Turkish Airlines
Tue 9/159:20 am
VAR
-
ORD
1 stop32h 20m
Turkish Airlines
Deal found 7/22$765
This Mytrip deal was found by Cheapflights users on 7/21. 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 10/47:25 pm
ORD
-
SOF
2 stops18h 35m
Multiple Airlines
Fri 2/269:45 pm
SOF
-
ORD
2 stops29h 30m
Multiple Airlines
Deal found 7/21$784
This Mytrip deal was found by Cheapflights users on 7/20. 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.
Thu 10/227:09 am
ORD
-
SOF
2 stops21h 01m
Air Canada
Thu 11/56:25 am
SOF
-
ORD
2 stops16h 27m
Air Canada
Deal found 7/20$785
This SmartFares deal was found by Cheapflights users on 7/20. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/35:10 pm
ORD
-
SOF
1 stop16h 50m
LOT
Thu 9/102:35 pm
SOF
-
ORD
1 stop13h 15m
LOT
Deal found 7/20$787
This Turkish Airlines deal was found by Cheapflights users on 7/21. 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.
Thu 8/1311:25 am
ORD
-
SOF
1 stop24h 55m
Turkish Airlines
Mon 9/283:50 pm
SOF
-
ORD
1 stop25h 50m
Turkish Airlines
Deal found 7/21$789
This Turkish Airlines deal was found by Cheapflights users on 7/21. 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.
Tue 9/158:10 pm
ORD
-
SOF
1 stop28h 35m
Turkish Airlines
Fri 10/169:35 am
SOF
-
ORD
1 stop32h 05m
Turkish Airlines
Deal found 7/21$790
This oojo deal was found by Cheapflights users on 7/22. 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.
Thu 9/35:10 pm
ORD
-
SOF
1 stop12h 40m
LOT
Thu 9/246:45 pm
SOF
-
ORD
1 stop33h 05m
LOT
Deal found 7/22$792
This Mytrip deal was found by Cheapflights users on 7/21. 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.
Wed 9/97:25 pm
ORD
-
SOF
2 stops21h 15m
Multiple Airlines
Wed 10/213:55 pm
SOF
-
ORD
2 stops32h 15m
Multiple Airlines
Deal found 7/21$794
This Turkish Airlines deal was found by Cheapflights users on 7/22. 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 8/318:10 pm
ORD
-
SOF
1 stop16h 10m
Turkish Airlines
Thu 9/173:50 pm
SOF
-
ORD
1 stop25h 50m
Turkish Airlines
Deal found 7/22$795
This Mytrip deal was found by Cheapflights users on 7/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/257:25 pm
ORD
-
SOF
2 stops20h 10m
Multiple Airlines
Wed 9/236:55 pm
SOF
-
ORD
2 stops27h 05m
Multiple Airlines
Deal found 7/18$796
This oojo deal was found by Cheapflights users on 7/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/19:50 pm
ORD
-
SOF
1 stop12h 10m
LOT
Mon 10/56:45 pm
SOF
-
ORD
1 stop33h 05m
LOT
Deal found 7/19$797

Find flight deals from Chicago to Bulgaria

Keep the following information in mind while searching for Chicago to Bulgaria flight deals. Data was last updated July 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$651
(Gotogate)

One-way from

$309
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$1,172
Provider with most accurate pricing for Chicago (CHI)-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Sofia flights.
Search Deals
From Chicago (CHI) to Bulgaria
Search Deals
One-way flight from Chicago (CHI) to Bulgaria
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($251 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago 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 July 22, 2026.
Use the filters below to find and compare flights from Chicago to Bulgaria that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 9/1

11:25 am-3:00 pm

1 stop19h 35m

Sofia

Tue 9/15

9:10 pm-9:40 am

1 stop20h 30m

$801

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 9/2

8:10 pm-11:45 am

1 stop31h 35m

Sofia

Fri 9/18

3:50 pm-9:40 am

1 stop25h 50m

$831

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 10/16

10:54 am-12:10 pm

2 stops17h 16m

Sofia

Fri 10/30

6:25 am-4:20 pm

1 stop16h 55m

$833

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 10/16

8:50 am-12:10 pm

2 stops19h 20m

Sofia

Tue 10/27

6:25 am-2:10 pm

1 stop14h 45m

$833
Quickest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 8/23

9:40 pm-6:40 pm

1 stop13h 00m

Sofia

Wed 10/7

6:20 am-2:52 pm

2 stops16h 32m

$838

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 10/5

12:59 pm-12:10 pm

2 stops15h 11m

Sofia

Wed 3/3

6:25 am-3:20 pm

1 stop16h 55m

$842

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 8/23

12:56 pm-12:10 pm

2 stops15h 14m

Sofia

Tue 10/6

6:10 am-2:52 pm

2 stops16h 42m

$843

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 8/23

11:15 am-12:10 pm

2 stops16h 55m

Sofia

Wed 10/7

6:20 am-2:52 pm

2 stops16h 32m

$843

ChicagoVarna

ORD - VAR

ORDVAR

Chicago O'Hare Intl

Tue 9/1

4:05 pm-6:45 pm

1 stop18h 40m

Varna

Tue 9/8

9:10 pm-3:55 pm

1 stop26h 45m

$848

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 9/2

4:00 pm-6:40 pm

2 stops18h 40m

Sofia

Tue 9/15

6:10 am-7:35 pm

2 stops21h 25m

$850

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/19

Showing 1-10 of 48 resultsSorted by cheapest first
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Best time to book a flight from Chicago to Bulgaria

Have a flexible travel schedule? Discover the best time to fly to Bulgaria from Chicago with our price prediction graph.
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 Bulgaria

What is the cheapest month to book a flight from Chicago to Bulgaria?

Currently, February is the cheapest month in which you can book a flight from Chicago to Bulgaria (average of $593). Flying from Chicago to Bulgaria in June is currently the most expensive (average of $1,159). 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 far ahead should I book a flight from Chicago to Bulgaria?

To ensure you get the cheapest price possible for a flight from Chicago to Bulgaria, you should look to book at least 41 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing Bulgaria

Get insights into the airlines that provide service to Bulgaria. 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 Bulgaria. Reviews last updated July 22, 2026.
Peruse reviews from past customers who have flown with LOT,SWISS, andTurkish Airlines from Chicago to Bulgaria to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
LOT
7.5
Good
1,212 reviews

Comfort

7.5

Crew

8.2

Boarding

7.5

Entertainment

6.9

Food

7.2

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Rami,Sep 2025

LAX - WAW

The second leg. Very tight seats No WiFi on both flights
LOT
7.5
Good
1,212 reviews
LOT
7.5
Good
1,212 reviews

Comfort

7.5

Crew

8.2

Boarding

7.5

Entertainment

6.9

Food

7.2

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Rami,Sep 2025

LAX - WAW

The second leg. Very tight seats No WiFi on both flights
SWISS
7.5
Good
2,015 reviews
LOT
7.5
Good
1,212 reviews

Comfort

7.5

Crew

8.2

Boarding

7.5

Entertainment

6.9

Food

7.2

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Rami,Sep 2025

LAX - WAW

The second leg. Very tight seats No WiFi on both flights
Turkish Airlines
7.4
Good
4,449 reviews
LOT
7.5
Good
1,212 reviews

Comfort

7.5

Crew

8.2

Boarding

7.5

Entertainment

6.9

Food

7.2

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Rami,Sep 2025

LAX - WAW

The second leg. Very tight seats No WiFi on both flights
United Airlines
7.4
Good
10,019 reviews
LOT
7.5
Good
1,212 reviews

Comfort

7.5

Crew

8.2

Boarding

7.5

Entertainment

6.9

Food

7.2

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Rami,Sep 2025

LAX - WAW

The second leg. Very tight seats No WiFi on both flights
Lufthansa
6.8
Okay
8,158 reviews
LOT
7.5
Good
1,212 reviews

Comfort

7.5

Crew

8.2

Boarding

7.5

Entertainment

6.9

Food

7.2

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Rami,Sep 2025

LAX - WAW

The second leg. Very tight seats No WiFi on both flights

Related info for your journey

Find useful and relevant information for your journey from Chicago to Bulgaria. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Chicago to Bulgaria?

    For as low as $833, Turkish Airlines can have you in Bulgaria from Chicago in 17h 16m. There are 5194 mi between Chicago and Bulgaria. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Chicago to Bulgaria one-way?

    To fly one-way, consider booking your trip with JetBlue, which is currently one of the cheapest options available, starting at $275. Turkish Airlines flights start at $295 while deals on Air Serbia start at $353 one-way.

  • What are the most popular routes from Chicago to Bulgaria?

    The most popular route from Chicago to Bulgaria is Chicago O'Hare Intl - Sofia. You may also consider Chicago O'Hare Intl - Varna or Chicago Midway - Sofia.

  • Can I find deals for flights from Chicago to Bulgaria that include hotel bookings?

    Yes. In addition to deals on Chicago to Bulgaria flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to Bulgaria?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Bulgaria.

  • Can I find deals for business class flights from Chicago to Bulgaria?

    Yes. Cheapflights offers flight deals from Chicago to Bulgaria by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Chicago to Bulgaria?

    Currently, February is the cheapest month in which you can book a flight from Chicago to Bulgaria (average of $593). Flying from Chicago to Bulgaria in June is currently the most expensive (average of $1,159). 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.

See more FAQs

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.

Top 10 airlines flying from Chicago to Bulgaria

Discover the top 10 airlines that operate flights from Chicago 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 July 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$520Average$779FlexibilityNo cancel feeOn-time77%
SWISSCheapest$565Average$832FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$566Average$996FlexibilityNo cancel feeOn-time69%
LOTCheapest$578Average$831FlexibilityNo cancel feeOn-time81%
Air FranceCheapest$585Average$895FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$588Average$917FlexibilityNo cancel feeOn-time78%
LufthansaCheapest$605Average$815FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$609Average$646FlexibilityNo cancel feeOn-time70%
KLMCheapest$614Average$814FlexibilityNo cancel feeOn-time75%
Air SerbiaCheapest$703Average$869FlexibilityNo cancel feeOn-timeN/A

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