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$318+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SOF
Jul 9 — Jul 161
Thu 7/9
Thu 7/16
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 June 9, 2026.

This Booking.com deal was found by Cheapflights users on 6/6. 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.
Mon 9/2811:25 am
ORD
-
VAR
1 stop13h 05m
Turkish Airlines
Mon 10/1210:10 pm
VAR
-
ORD
1 stop19h 30m
Turkish Airlines
Deal found 6/6$803
This Booking.com deal was found by Cheapflights users on 6/8. 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.
Tue 9/18:10 pm
ORD
-
VAR
1 stop17h 10m
Turkish Airlines
Mon 9/289:20 am
VAR
-
ORD
1 stop32h 20m
Turkish Airlines
Deal found 6/8$804
This FlightHub deal was found by Cheapflights users on 6/8. 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 9/110:30 pm
ORD
-
VAR
1 stop12h 15m
Multiple Airlines
Mon 9/284:00 pm
VAR
-
ORD
2 stops33h 20m
Multiple Airlines
Deal found 6/8$867
This Booking.com deal was found by Cheapflights users on 6/5. 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 9/28:10 pm
ORD
-
VAR
1 stop28h 20m
Turkish Airlines
Sun 9/69:20 am
VAR
-
ORD
1 stop32h 20m
Turkish Airlines
Deal found 6/5$868
This FlightHub deal was found by Cheapflights users on 6/8. 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 9/112:56 pm
ORD
-
VAR
2 stops18h 19m
Austrian Airlines
Mon 9/284:00 pm
VAR
-
ORD
2 stops33h 20m
Austrian Airlines
Deal found 6/8$874
This Booking.com deal was found by Cheapflights users on 6/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1911:25 am
ORD
-
VAR
1 stop25h 55m
Turkish Airlines
Mon 8/319:20 am
VAR
-
ORD
1 stop32h 20m
Turkish Airlines
Deal found 6/7$877
This Justfly.com deal was found by Cheapflights users on 6/5. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/279:40 pm
ORD
-
VAR
2 stops31h 05m
Lufthansa
Wed 8/128:00 pm
VAR
-
ORD
1 stop24h 55m
Lufthansa
Deal found 6/5$878
This FlightHub deal was found by Cheapflights users on 6/5. 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 9/212:56 pm
ORD
-
VAR
2 stops18h 19m
Multiple Airlines
Sun 9/610:25 am
VAR
-
ORD
1 stop34h 10m
Multiple Airlines
Deal found 6/5$881
This oojo deal was found by Cheapflights users on 6/8. 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 7/269:50 pm
ORD
-
SOF
1 stop12h 10m
LOT
Sun 10/186:45 pm
SOF
-
ORD
1 stop33h 05m
LOT
Deal found 6/8$881
This KAYAK deal was found by Cheapflights users on 6/9. 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.
Wed 8/59:40 pm
ORD
-
SOF
1 stop13h 00m
Lufthansa
Sun 8/167:25 pm
SOF
-
ORD
1 stop25h 10m
Lufthansa
Deal found 6/9$882
This FlightHub deal was found by Cheapflights users on 6/8. 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 8/29:40 pm
ORD
-
SOF
2 stops17h 20m
Lufthansa
Mon 8/177:00 pm
SOF
-
ORD
1 stop25h 55m
Lufthansa
Deal found 6/8$883
This United Airlines deal was found by Cheapflights users on 6/9. 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 stop17h 35m
United Airlines
Mon 8/176:10 am
SOF
-
ORD
2 stops16h 45m
United Airlines
Deal found 6/9$884

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 June 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$803
(Booking.com)

One-way from

$318
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,102
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. 27% potential increase in price ($280 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 9, 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

ChicagoVarna

ORD - VAR

ORDVAR

Chicago O'Hare Intl

Wed 9/2

8:10 pm-8:30 am

1 stop28h 20m

Varna

Sun 9/6

9:20 am-9:40 am

1 stop32h 20m

$868

ChicagoVarna

ORD - VAR

ORDVAR

Chicago O'Hare Intl

Wed 9/2

12:56 pm-3:15 pm

2 stops18h 19m

Varna

Sun 9/6

10:25 am-12:35 pm

1 stop34h 10m

$881

ChicagoVarna

ORD - VAR

ORDVAR

Chicago O'Hare Intl

Mon 7/27

8:40 am-12:50 pm

2 stops20h 10m

Varna

Wed 8/12

4:00 pm-12:55 pm

2 stops28h 55m

$889

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 8/1

9:40 pm-11:15 pm

1 stop17h 35m

Sofia

Thu 8/27

6:30 am-6:37 pm

2 stops20h 07m

$896

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 8/1

6:12 pm-10:50 pm

2 stops20h 38m

Sofia

Sun 8/23

6:10 am-12:35 pm

1 stop14h 25m

$898

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 7/6

9:40 pm-11:15 pm

1 stop17h 35m

Sofia

Thu 9/3

6:30 am-8:26 pm

2 stops21h 56m

$902

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 8/22

8:40 pm-12:10 pm

2 stops31h 30m

Sofia

Sun 8/30

6:20 am-2:00 pm

2 stops15h 40m

$903

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 7/14

9:40 pm-11:15 pm

1 stop17h 35m

Sofia

Tue 9/1

6:10 am-10:30 pm

2 stops24h 20m

$903

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 7/12

9:40 pm-11:15 pm

1 stop17h 35m

Sofia

Tue 9/1

6:10 am-11:40 pm

2 stops25h 30m

$903
Quickest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 7/31

9:40 pm-11:15 pm

1 stop17h 35m

Sofia

Mon 8/17

6:10 am-12:35 pm

1 stop14h 25m

$912

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/7

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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, October is the cheapest month in which you can book a flight from Chicago to Bulgaria (average of $385). Flying from Chicago to Bulgaria in May is currently the most expensive (average of $1,603). 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 June 9, 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
1,197 reviews

Crew

8.2

Boarding

7.5

Comfort

7.5

Overall

7.5

Food

7.2

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Patrycja,May 2026

KRK - ORD

The whole flight was great. Crew was friendly and helpful.
LOT
7.5
Good
1,197 reviews
LOT
7.5
Good
1,197 reviews

Crew

8.2

Boarding

7.5

Comfort

7.5

Overall

7.5

Food

7.2

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Patrycja,May 2026

KRK - ORD

The whole flight was great. Crew was friendly and helpful.
SWISS
7.5
Good
1,968 reviews
LOT
7.5
Good
1,197 reviews

Crew

8.2

Boarding

7.5

Comfort

7.5

Overall

7.5

Food

7.2

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Patrycja,May 2026

KRK - ORD

The whole flight was great. Crew was friendly and helpful.
Turkish Airlines
7.4
Good
4,409 reviews
LOT
7.5
Good
1,197 reviews

Crew

8.2

Boarding

7.5

Comfort

7.5

Overall

7.5

Food

7.2

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Patrycja,May 2026

KRK - ORD

The whole flight was great. Crew was friendly and helpful.
United Airlines
7.4
Good
9,802 reviews
LOT
7.5
Good
1,197 reviews

Crew

8.2

Boarding

7.5

Comfort

7.5

Overall

7.5

Food

7.2

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Patrycja,May 2026

KRK - ORD

The whole flight was great. Crew was friendly and helpful.
Lufthansa
6.8
Okay
8,049 reviews
LOT
7.5
Good
1,197 reviews

Crew

8.2

Boarding

7.5

Comfort

7.5

Overall

7.5

Food

7.2

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Patrycja,May 2026

KRK - ORD

The whole flight was great. Crew was friendly and helpful.

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 $933, Turkish Airlines can have you in Bulgaria from Chicago in 16h 42m. There are 5198 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 $335 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, October is the cheapest month in which you can book a flight from Chicago to Bulgaria (average of $385). Flying from Chicago to Bulgaria in May is currently the most expensive (average of $1,603). 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 June 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
ITA AirwaysCheapest$508Average$1,161FlexibilityNo cancel feeOn-time81%
Turkish AirlinesCheapest$523Average$800FlexibilityNo cancel feeOn-time77%
KLMCheapest$533Average$732FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$561Average$919FlexibilityNo cancel feeOn-time69%
SWISSCheapest$565Average$824FlexibilityNo cancel feeOn-time79%
Austrian AirlinesCheapest$575Average$884FlexibilityNo cancel feeOn-time78%
LOTCheapest$578Average$836FlexibilityNo cancel feeOn-time81%
LufthansaCheapest$578Average$915FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$585Average$866FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$609Average$644FlexibilityNo cancel feeOn-time70%

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