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Bulgaria

$328+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SOF
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Chicago to Bulgaria

Keep the following information in mind while searching for Chicago to Bulgaria flight deals. Data was last updated September 15, 2025.

Round-trip from

$503
(Justfly.com)

One-way from

$328
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$595
From Chicago (CHI) to Bulgaria
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One-way flight from Chicago (CHI) to Bulgaria
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Highest demand for flights based on searches. 27% potential increase in price ($270 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 15, 2025.

This Justfly.com deal was found by Cheapflights users on 9/15. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2011:45 pmORD - VAR
1 stop25h 00mTurkish Airlines
Tue 11/410:25 amVAR - ORD
1 stop31h 40mTurkish Airlines
Deal found 9/15$503
This Mytrip deal was found by Cheapflights users on 9/13. 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 11/56:50 pmORD - SOF
2 stops15h 30mMultiple Airlines
Wed 11/196:10 amSOF - ORD
2 stops21h 50mMultiple Airlines
Deal found 9/13$545
This FlightHub deal was found by Cheapflights users on 9/13. 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 11/2011:50 amORD - SOF
1 stop19h 20mTurkish Airlines
Sun 11/234:00 pmSOF - ORD
1 stop34h 25mTurkish Airlines
Deal found 9/13$546
This Cheapflightsfares deal was found by Cheapflights users on 9/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/169:50 pmORD - SOF
1 stop16h 55mLufthansa
Thu 1/156:00 amSOF - ORD
1 stop15h 10mLufthansa
Deal found 9/13$547
This Expedia deal was found by Cheapflights users on 9/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/127:05 pmORD - SOF
1 stop11h 40mMultiple Airlines
Thu 11/66:00 amSOF - ORD
2 stops16h 55mMultiple Airlines
Deal found 9/14$549
This Mytrip deal was found by Cheapflights users on 9/13. 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 10/287:50 pmORD - SOF
2 stops15h 30mMultiple Airlines
Tue 11/46:00 amSOF - ORD
2 stops21h 30mMultiple Airlines
Deal found 9/13$550
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Sun 11/29:50 pmORD - SOF
1 stop16h 55mUnited Airlines
Tue 11/186:00 amSOF - ORD
2 stops16h 55mUnited Airlines
Deal found 9/14$551
This oojo deal was found by Cheapflights users on 9/13. 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 11/29:55 pmORD - SOF
2 stops35h 55mLOT
Sun 11/166:35 pmSOF - ORD
2 stops33h 20mLOT
Deal found 9/13$552
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Tue 11/44:00 pmORD - SOF
2 stops18h 20mUnited Airlines
Tue 11/186:00 amSOF - ORD
2 stops22h 00mUnited Airlines
Deal found 9/14$555
This Gotogate deal was found by Cheapflights users on 9/14. 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 10/1311:45 pmORD - VAR
1 stop25h 00mTurkish Airlines
Tue 10/2810:25 amVAR - ORD
1 stop31h 40mTurkish Airlines
Deal found 9/14$556
This LOT deal was found by Cheapflights users on 9/14. 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 LOT is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/79:55 pmORD - SOF
1 stop31h 55mLOT
Sat 11/222:35 pmSOF - ORD
1 stop13h 25mLOT
Deal found 9/14$557
This Air Canada deal was found by Cheapflights users on 9/13. 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.
Sun 11/1612:50 pmORD - SOF
2 stops16h 20mAir Canada
Fri 3/66:10 amSOF - ORD
2 stops21h 20mAir Canada
Deal found 9/13$558

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 September 15, 2025.
Use the filters below to find and compare flights from Chicago to Bulgaria that are best for you.

Fly from

Chicago

Fly to

Bulgaria

Route

Depart

Return

Price

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 11/3

6:00 pm-1:15 pm

1 stop11h 15m

Sofia

Wed 11/19

6:10 am-2:55 pm

2 stops16h 45m

$551

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 11/4

6:00 pm-10:45 pm

1 stop20h 45m

Sofia

Thu 11/20

6:00 am-8:00 pm

2 stops22h 00m

$551

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 11/5

9:50 pm-6:20 pm

1 stop12h 30m

Sofia

Wed 11/19

6:10 am-2:55 pm

2 stops16h 45m

$551

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 11/2

9:50 pm-10:45 pm

1 stop16h 55m

Sofia

Tue 11/18

6:00 am-2:55 pm

2 stops16h 55m

$551

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 11/3

9:50 pm-10:45 pm

1 stop16h 55m

Sofia

Thu 11/20

6:00 am-8:00 pm

2 stops22h 00m

$551

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 1/13

9:50 pm-6:20 pm

1 stop12h 30m

Sofia

Tue 1/27

6:00 am-8:00 pm

2 stops22h 00m

$552

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 2/10

6:00 pm-1:15 pm

1 stop11h 15m

Sofia

Tue 2/24

6:00 am-2:55 pm

2 stops16h 55m

$552

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 1/13

9:50 pm-6:20 pm

1 stop12h 30m

Sofia

Tue 1/27

6:00 am-6:51 pm

2 stops20h 51m

$552

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 1/14

9:50 pm-6:20 pm

1 stop12h 30m

Sofia

Wed 1/28

6:10 am-2:55 pm

2 stops16h 45m

$552

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 11/4

4:00 pm-6:20 pm

2 stops18h 20m

Sofia

Wed 11/19

6:10 am-8:00 pm

2 stops21h 50m

$555

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 36 results
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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 $632). Flying from Chicago to Bulgaria in June is currently the most expensive (average of $1,185). 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.

What is the cheapest time of day to fly from CHI to BG?

Find hourly flight availability from Chicago to Bulgaria. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

When flying from Chicago to Bulgaria, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 September 15, 2025.
Peruse reviews from past customers who have flown with KLM, 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.
KLM
7.8
Good
1,385 reviews

Entertainment

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Food

7.3

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
KLM
7.8
Good
1,385 reviews
KLM
7.8
Good
1,385 reviews

Entertainment

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Food

7.3

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
LOT
7.6
Good
1,114 reviews
KLM
7.8
Good
1,385 reviews

Entertainment

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Food

7.3

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
United Airlines
7.4
Good
8,929 reviews
KLM
7.8
Good
1,385 reviews

Entertainment

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Food

7.3

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
Turkish Airlines
7.3
Good
3,968 reviews
KLM
7.8
Good
1,385 reviews

Entertainment

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Food

7.3

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
Lufthansa
6.8
Okay
7,407 reviews
KLM
7.8
Good
1,385 reviews

Entertainment

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Food

7.3

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

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 $551, United Airlines can have you in Bulgaria from Chicago in 11h 15m. 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 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 $632). Flying from Chicago to Bulgaria in June is currently the most expensive (average of $1,185). 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

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Alternative routes for Chicago to Bulgaria

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$495Average$892FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$498Average$624FlexibilityNo cancel feeOn-time77%
KLMCheapest$533Average$739FlexibilityNo cancel feeOn-time75%
LOTCheapest$569Average$902FlexibilityNo cancel feeOn-time81%
LufthansaCheapest$590Average$1,023FlexibilityNo cancel feeOn-time76%
SWISSCheapest$596Average$813FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$601Average$790FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$613Average$808FlexibilityNo cancel feeOn-time70%
Austrian AirlinesCheapest$616Average$1,004FlexibilityNo cancel feeOn-time78%
Air SerbiaCheapest$652Average$1,021FlexibilityNo cancel feeOn-timeN/A

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