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$323+ 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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SOF
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$650
(FlightHub)

One-way from

$323
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,182
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. 28% potential increase in price ($301 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This SWISS deal was found by Cheapflights users on 6/12. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/42:20 pmORD - VAR
1 stop21h 50mSWISS
Tue 8/199:00 pmVAR - ORD
1 stop23h 10mSWISS
Deal found 6/12$650
This CheapOair deal was found by Cheapflights users on 6/12. 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.
Sat 8/99:40 pmORD - VAR
2 stops31h 05mMultiple Airlines
Wed 9/104:00 pmVAR - ORD
1 stop29h 20mMultiple Airlines
Deal found 6/12$658
This Ovago deal was found by Cheapflights users on 6/12. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/94:20 pmORD - VAR
1 stop12h 25mAustrian Airlines
Wed 9/104:00 pmVAR - ORD
1 stop29h 20mAustrian Airlines
Deal found 6/12$661
This Lufthansa deal was found by Cheapflights users on 6/10. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/293:35 pmORD - SOF
1 stop12h 25mLufthansa
Tue 9/212:00 pmSOF - ORD
1 stop15h 55mLufthansa
Deal found 6/10$669
This Turkish Airlines deal was found by Cheapflights users on 6/11. 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 9/2611:25 amORD - SOF
1 stop13h 10mTurkish Airlines
Thu 12/184:00 pmSOF - ORD
1 stop26h 10mTurkish Airlines
Deal found 6/11$670
This Booking.com deal was found by Cheapflights users on 6/11. 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 9/18:40 amORD - SOF
2 stops20h 20mAir Canada
Wed 9/246:15 amSOF - ORD
2 stops35h 36mAir Canada
Deal found 6/11$673
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Fri 9/265:55 pmORD - SOF
2 stops21h 05mUnited Airlines
Tue 12/236:00 amSOF - ORD
1 stop15h 10mUnited Airlines
Deal found 6/11$674
This SWISS deal was found by Cheapflights users on 6/10. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/47:05 pmORD - SOF
1 stop31h 00mSWISS
Wed 8/2012:45 pmSOF - ORD
2 stops31h 25mSWISS
Deal found 6/10$676
This Austrian Airlines deal was found by Cheapflights users on 6/11. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/141:05 pmORD - SOF
2 stops26h 50mAustrian Airlines
Sun 9/146:55 pmSOF - ORD
1 stop26h 25mAustrian Airlines
Deal found 6/11$681
This ITA Airways deal was found by Cheapflights users on 6/10. 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 ITA Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/297:00 amORD - SOF
2 stops21h 05mITA Airways
Fri 8/296:00 pmSOF - ORD
1 stop27h 10mITA Airways
Deal found 6/10$684
This Ovago deal was found by Cheapflights users on 6/10. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/266:00 pmORD - BOJ
1 stop15h 35mLufthansa
Tue 9/169:25 amBOJ - ORD
1 stop18h 30mLufthansa
Deal found 6/10$688
This oojo deal was found by Cheapflights users on 6/12. 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 7/235:10 pmORD - SOF
1 stop12h 40mLOT
Wed 8/202:35 pmSOF - ORD
1 stop32h 35mLOT
Deal found 6/12$696

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 12, 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

ChicagoVarna

ORD - VAR

ORDVAR

Chicago O'Hare Intl

Mon 8/4

2:20 pm-8:10 pm

1 stop21h 50m

Varna

Tue 8/19

9:00 pm-12:10 pm

1 stop23h 10m

$650

ChicagoVarna

ORD - VAR

ORDVAR

Chicago O'Hare Intl

Sat 8/9

9:40 pm-12:45 pm

2 stops31h 05m

Varna

Wed 9/10

4:00 pm-1:20 pm

1 stop29h 20m

$658

ChicagoVarna

ORD - VAR

ORDVAR

Chicago O'Hare Intl

Sat 8/9

4:20 pm-12:45 pm

1 stop12h 25m

Varna

Wed 9/10

4:00 pm-1:20 pm

1 stop29h 20m

$661

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 7/29

9:40 pm-11:00 pm

1 stop17h 20m

Sofia

Wed 8/27

6:15 am-8:16 pm

2 stops22h 01m

$669

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 9/26

11:25 am-8:35 am

1 stop13h 10m

Sofia

Thu 12/18

4:00 pm-10:10 am

1 stop26h 10m

$670

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 7/30

10:30 pm-10:50 pm

1 stop16h 20m

Sofia

Tue 9/2

6:20 am-7:55 pm

1 stop21h 35m

$672

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 9/1

8:40 am-5:50 pm

2 stops25h 10m

Sofia

Sun 9/28

6:20 am-9:51 am

2 stops35h 31m

$673

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 8/4

7:05 pm-10:05 am

1 stop31h 00m

Sofia

Wed 8/20

12:45 pm-12:10 pm

2 stops31h 25m

$676

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 8/14

1:05 pm-11:55 pm

2 stops26h 50m

Sofia

Sun 9/14

6:55 pm-1:20 pm

1 stop26h 25m

$681

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 7/29

7:00 am-12:05 pm

2 stops21h 05m

Sofia

Fri 8/29

6:00 pm-1:10 pm

1 stop27h 10m

$684

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 42 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 $1,203). 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 June 12, 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.

Rainfall in Bulgaria by month

Plan your trip to Bulgaria by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Bulgaria ranges from 1.2 - 2.8 inches per month. June is typically the wettest month, when rainfall can reach 2.8 in. January is typically the driest time to visit Bulgaria when rainfall is around 1.2 in.

Temperature in Bulgaria by month

Plan your trip to Bulgaria by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Bulgaria, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 12, 2025.
Read through reviews of airlines operating flights from Chicago to Bulgaria, such as KLM, LOT and Austrian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,358 reviews

Food

7.2

Boarding

7.8

Entertainment

7.1

Overall

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
KLM
7.8
Good
1,358 reviews
KLM
7.8
Good
1,358 reviews

Food

7.2

Boarding

7.8

Entertainment

7.1

Overall

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
LOT
7.6
Good
1,077 reviews
KLM
7.8
Good
1,358 reviews

Food

7.2

Boarding

7.8

Entertainment

7.1

Overall

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Austrian Airlines
7.6
Good
802 reviews
KLM
7.8
Good
1,358 reviews

Food

7.2

Boarding

7.8

Entertainment

7.1

Overall

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Air France
7.5
Good
1,463 reviews
KLM
7.8
Good
1,358 reviews

Food

7.2

Boarding

7.8

Entertainment

7.1

Overall

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
SWISS
7.5
Good
1,623 reviews
KLM
7.8
Good
1,358 reviews

Food

7.2

Boarding

7.8

Entertainment

7.1

Overall

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.

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.

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

    To fly one-way, consider booking your trip with Lufthansa, which is currently one of the cheapest options available, starting at $325. Austrian Airlines flights start at $372 while deals on Turkish Airlines start at $394 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 $632). Flying from Chicago to Bulgaria in June is currently the most expensive (average of $1,203). 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$487Average$934FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$498Average$604FlexibilityNo cancel feeOn-time77%
LOTCheapest$572Average$872FlexibilityNo cancel feeOn-time81%
KLMCheapest$578Average$739FlexibilityNo cancel feeOn-time75%
SWISSCheapest$596Average$920FlexibilityNo cancel feeOn-time79%
Austrian AirlinesCheapest$607Average$895FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$613Average$778FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$614Average$1,117FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$617Average$802FlexibilityNo cancel feeOn-time69%
Air SerbiaCheapest$652Average$1,021FlexibilityNo cancel feeOn-timeN/A

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