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$273+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SOF
Mar 29 — Apr 51
Sun 3/29
Sun 4/5
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 February 27, 2026.

This FlightHub deal was found by Cheapflights users on 2/24. 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 3/411:50 am
ORD
-
SOF
1 stop12h 55m
Turkish Airlines
Wed 3/119:40 pm
SOF
-
ORD
1 stop20h 25m
Turkish Airlines
Deal found 2/24$542
This FlightHub deal was found by Cheapflights users on 2/25. 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 4/148:10 pm
ORD
-
SOF
1 stop28h 35m
Turkish Airlines
Thu 5/213:50 pm
SOF
-
ORD
1 stop25h 50m
Turkish Airlines
Deal found 2/25$546
This oojo deal was found by Cheapflights users on 2/25. 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 4/298:10 pm
ORD
-
SOF
1 stop16h 05m
Turkish Airlines
Fri 5/82:05 pm
SOF
-
ORD
1 stop27h 35m
Turkish Airlines
Deal found 2/25$548
This FlightHub deal was found by Cheapflights users on 2/25. 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
ORD
-
VAR
1 stop22h 35m
Turkish Airlines
Wed 9/309:35 am
VAR
-
ORD
1 stop32h 05m
Turkish Airlines
Deal found 2/25$559
This FlightHub deal was found by Cheapflights users on 2/24. 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 3/1612:50 pm
ORD
-
SOF
1 stop12h 55m
Turkish Airlines
Wed 4/153:50 pm
SOF
-
ORD
1 stop25h 50m
Turkish Airlines
Deal found 2/24$562
This FlightHub deal was found by Cheapflights users on 2/25. 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 9/68:10 pm
ORD
-
SOF
1 stop28h 35m
Turkish Airlines
Tue 9/229:35 am
SOF
-
ORD
1 stop16h 40m
Turkish Airlines
Deal found 2/25$568
This FlightHub deal was found by Cheapflights users on 2/26. 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 8/1211:25 am
ORD
-
SOF
1 stop13h 20m
Turkish Airlines
Fri 9/119:35 am
SOF
-
ORD
1 stop16h 40m
Turkish Airlines
Deal found 2/26$570
This FlightHub deal was found by Cheapflights users on 2/27. 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 3/318:10 pm
ORD
-
SOF
1 stop16h 05m
Turkish Airlines
Tue 4/149:05 pm
SOF
-
ORD
1 stop29h 10m
Turkish Airlines
Deal found 2/27$572
This Kiwi.com deal was found by Cheapflights users on 2/25. 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 4/49:50 pm
ORD
-
SOF
1 stop12h 10m
LOT
Thu 5/75:25 am
SOF
-
ORD
1 stop17h 45m
LOT
Deal found 2/25$573
This CrystalTravel deal was found by Cheapflights users on 2/25. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1610:55 pm
ORD
-
SOF
1 stop11h 55m
LOT
Tue 4/142:35 pm
SOF
-
ORD
1 stop13h 15m
LOT
Deal found 2/25$575
This FlightHub deal was found by Cheapflights users on 2/23. 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 4/168:10 pm
ORD
-
SOF
1 stop16h 05m
Turkish Airlines
Mon 4/209:05 pm
SOF
-
ORD
1 stop20h 35m
Turkish Airlines
Deal found 2/23$576
This oojo deal was found by Cheapflights users on 2/26. 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.
Fri 5/15:10 pm
ORD
-
SOF
1 stop12h 40m
LOT
Mon 5/112:35 pm
SOF
-
ORD
1 stop32h 35m
LOT
Deal found 2/26$578

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 February 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$542
(FlightHub)

One-way from

$273
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$589
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. 26% potential increase in price ($257 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 27, 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

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 4/4

9:50 pm-6:00 pm

1 stop12h 10m

Sofia

Thu 5/7

2:35 pm-7:50 pm

1 stop13h 15m

$599

ChicagoVarna

ORD - VAR

ORDVAR

Chicago O'Hare Intl

Fri 4/3

11:25 am-9:20 pm

1 stop25h 55m

Varna

Sun 4/19

9:35 am-9:40 am

1 stop32h 05m

$671

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 4/3

9:50 pm-1:50 pm

1 stop32h 00m

Sofia

Thu 5/7

6:45 pm-3:10 pm

2 stops28h 25m

$690

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Mon 4/27

1:24 pm-2:00 pm

2 stops16h 36m

Sofia

Fri 5/8

7:00 am-5:56 pm

2 stops18h 56m

$699

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 5/1

10:00 am-12:10 pm

2 stops18h 10m

Sofia

Tue 5/12

6:10 am-11:00 am

1 stop12h 50m

$737

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 3/30

2:10 pm-2:00 pm

2 stops15h 50m

Sofia

Sun 4/12

7:00 am-2:15 pm

1 stop15h 15m

$741

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 4/6

1:00 pm-12:10 pm

2 stops15h 10m

Sofia

Sat 10/3

6:20 am-8:03 pm

2 stops21h 43m

$743

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Thu 4/16

1:24 pm-2:00 pm

2 stops16h 36m

Sofia

Thu 4/30

7:00 am-4:26 pm

2 stops17h 26m

$774

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Wed 4/29

12:52 pm-2:00 pm

2 stops17h 08m

Sofia

Sat 5/9

7:00 am-5:56 pm

2 stops18h 56m

$774

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 4/3

2:10 pm-2:00 pm

2 stops15h 50m

Sofia

Thu 5/7

7:00 am-6:15 pm

2 stops19h 15m

$794

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/24

Showing 1-10 of 41 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, November is the cheapest month in which you can book a flight from Chicago to Bulgaria (average of $472). Flying from Chicago to Bulgaria in June is currently the most expensive (average of $825). 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.

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 February 27, 2026.
Peruse reviews from past customers who have flown with SWISS, LOT, and United 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.
SWISS
7.6
Good
1,883 reviews

Boarding

7.7

Crew

8.3

Comfort

7.4

Food

7.1

Overall

7.6

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

BOS - ZRH

Food was not very good and the options were poor. The seat wasn't very comfortable. I would not choose to fly on this airline again. Their website was also difficult to navigate.
SWISS
7.6
Good
1,883 reviews
SWISS
7.6
Good
1,883 reviews

Boarding

7.7

Crew

8.3

Comfort

7.4

Food

7.1

Overall

7.6

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

BOS - ZRH

Food was not very good and the options were poor. The seat wasn't very comfortable. I would not choose to fly on this airline again. Their website was also difficult to navigate.
LOT
7.5
Good
1,182 reviews
SWISS
7.6
Good
1,883 reviews

Boarding

7.7

Crew

8.3

Comfort

7.4

Food

7.1

Overall

7.6

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

BOS - ZRH

Food was not very good and the options were poor. The seat wasn't very comfortable. I would not choose to fly on this airline again. Their website was also difficult to navigate.
United Airlines
7.4
Good
9,352 reviews
SWISS
7.6
Good
1,883 reviews

Boarding

7.7

Crew

8.3

Comfort

7.4

Food

7.1

Overall

7.6

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

BOS - ZRH

Food was not very good and the options were poor. The seat wasn't very comfortable. I would not choose to fly on this airline again. Their website was also difficult to navigate.
Turkish Airlines
7.3
Good
4,238 reviews
SWISS
7.6
Good
1,883 reviews

Boarding

7.7

Crew

8.3

Comfort

7.4

Food

7.1

Overall

7.6

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

BOS - ZRH

Food was not very good and the options were poor. The seat wasn't very comfortable. I would not choose to fly on this airline again. Their website was also difficult to navigate.
Lufthansa
6.8
Okay
7,815 reviews
SWISS
7.6
Good
1,883 reviews

Boarding

7.7

Crew

8.3

Comfort

7.4

Food

7.1

Overall

7.6

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

BOS - ZRH

Food was not very good and the options were poor. The seat wasn't very comfortable. I would not choose to fly on this airline again. Their website was also difficult to navigate.

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 $599, LOT can have you in Bulgaria from Chicago in 12h 10m. 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 Turkish Airlines, which is currently one of the cheapest options available, starting at $295. United Airlines flights start at $305 while deals on Air Serbia start at $338 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 Midway - Sofia or Chicago O'Hare Intl - Varna.

  • 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, November is the cheapest month in which you can book a flight from Chicago to Bulgaria (average of $472). Flying from Chicago to Bulgaria in June is currently the most expensive (average of $825). 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 February 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
ITA AirwaysCheapest$469Average$973FlexibilityNo cancel feeOn-time81%
Turkish AirlinesCheapest$521Average$898FlexibilityNo cancel feeOn-time77%
KLMCheapest$533Average$652FlexibilityNo cancel feeOn-time75%
SWISSCheapest$565Average$808FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$566Average$793FlexibilityNo cancel feeOn-time69%
Air FranceCheapest$585Average$624FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$586Average$871FlexibilityNo cancel feeOn-time76%
LOTCheapest$587Average$886FlexibilityNo cancel feeOn-time81%
Austrian AirlinesCheapest$588Average$904FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$609Average$749FlexibilityNo cancel feeOn-time70%

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