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$303+ 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 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SOF
May 4 — May 111
Sun 5/4
Sun 5/11
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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$638
(FlightHub)

One-way from

$304
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$624
Provider with most accurate pricing for Chicago (CHI)-Sofia flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Sofia flights.
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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. 29% potential increase in price ($320 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 29, 2025.

This FlightHub deal was found by Cheapflights users on 4/28. 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 9/2911:25 amORD - SOF
1 stop13h 10mTurkish Airlines
Tue 10/79:15 pmSOF - ORD
1 stop20h 25mTurkish Airlines
Deal found 4/28$621
This CrystalTravel deal was found by Cheapflights users on 4/29. 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 8/43:35 pmORD - SOF
1 stop12h 25mLufthansa
Mon 8/257:25 pmSOF - ORD
1 stop25h 05mLufthansa
Deal found 4/29$627
This Gotogate deal was found by Cheapflights users on 4/28. 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.
Fri 11/2811:20 amORD - SOF
2 stops18h 15mMultiple Airlines
Thu 1/294:00 pmSOF - ORD
1 stop32h 15mMultiple Airlines
Deal found 4/28$628
This Air Serbia deal was found by Cheapflights users on 4/28. 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 Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/174:30 pmORD - SOF
1 stop15h 05mAir Serbia
Tue 9/304:05 pmSOF - ORD
1 stop30h 20mAir Serbia
Deal found 4/28$635
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Fri 8/12:20 pmORD - SOF
1 stop11h 45mSWISS
Tue 8/191:15 pmSOF - ORD
1 stop30h 55mSWISS
Deal found 4/28$644
This oojo deal was found by Cheapflights users on 4/28. 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 8/65:10 pmORD - SOF
1 stop12h 40mLOT
Wed 8/206:40 pmSOF - ORD
1 stop25h 40mLOT
Deal found 4/28$648
This CheapOair deal was found by Cheapflights users on 4/29. 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.
Thu 10/168:40 amORD - SOF
2 stops20h 25mAir Canada
Fri 11/76:00 amSOF - ORD
2 stops16h 45mAir Canada
Deal found 4/29$657
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Wed 7/232:20 pmORD - SOF
2 stops13h 40mUnited Airlines
Wed 11/196:00 amSOF - ORD
2 stops16h 45mUnited Airlines
Deal found 4/29$658
This United deal was found by Cheapflights users on 4/29. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/94:20 pmORD - VAR
1 stop12h 25mMultiple Airlines
Tue 8/199:00 pmVAR - ORD
1 stop23h 10mMultiple Airlines
Deal found 4/29$668
This Austrian Airlines deal was found by Cheapflights users on 4/29. 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.
Sun 8/104:20 pmORD - VAR
1 stop12h 25mAustrian Airlines
Wed 9/34:00 pmVAR - ORD
1 stop29h 20mAustrian Airlines
Deal found 4/29$731
This Austrian Airlines deal was found by Cheapflights users on 4/29. 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.
Tue 8/121:05 pmORD - SOF
2 stops26h 50mAustrian Airlines
Fri 9/194:05 pmSOF - ORD
1 stop29h 15mAustrian Airlines
Deal found 4/29$735
This FlightHub deal was found by Cheapflights users on 4/29. 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 5/74:00 pmORD - VAR
2 stops15h 15mLufthansa
Fri 11/74:00 pmVAR - ORD
2 stops34h 25mLufthansa
Deal found 4/29$738

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 April 29, 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 9/29

11:25 am-8:35 am

1 stop13h 10m

Sofia

Tue 10/7

9:15 pm-9:40 am

1 stop20h 25m

$621

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 8/4

3:35 pm-12:00 pm

1 stop12h 25m

Sofia

Mon 8/25

7:25 pm-12:30 pm

1 stop25h 05m

$627

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 8/6

2:20 pm-10:05 am

1 stop11h 45m

Sofia

Tue 8/26

8:00 am-1:20 pm

1 stop13h 20m

$631

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 9/17

4:30 pm-3:35 pm

1 stop15h 05m

Sofia

Sat 9/27

5:00 am-9:00 pm

1 stop24h 00m

$635

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 8/1

2:20 pm-10:05 am

1 stop11h 45m

Sofia

Tue 8/19

1:15 pm-12:10 pm

1 stop30h 55m

$644

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 8/6

5:10 pm-1:50 pm

1 stop12h 40m

Sofia

Wed 8/20

6:40 pm-12:20 pm

1 stop25h 40m

$648

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 10/16

8:40 am-1:05 pm

2 stops20h 25m

Sofia

Fri 11/7

6:00 am-2:45 pm

2 stops16h 45m

$657

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 7/23

2:20 pm-12:00 pm

2 stops13h 40m

Sofia

Wed 11/19

6:00 am-2:45 pm

2 stops16h 45m

$658

ChicagoVarna

ORD - VAR

ORDVAR

Chicago O'Hare Intl

Sat 8/9

4:20 pm-12:45 pm

1 stop12h 25m

Varna

Tue 8/19

9:00 pm-12:10 pm

1 stop23h 10m

$668

ChicagoVarna

ORD - VAR

ORDVAR

Chicago O'Hare Intl

Sun 8/10

4:20 pm-12:45 pm

1 stop12h 25m

Varna

Wed 9/3

4:00 pm-1:20 pm

1 stop29h 20m

$731

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 31 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 $1,218). 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 April 29, 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 April 29, 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
1,333 reviews

Entertainment

7.1

Boarding

7.8

Overall

7.8

Crew

8.4

Food

7.2

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
KLM
7.8
Good
1,333 reviews
KLM
7.8
Good
1,333 reviews

Entertainment

7.1

Boarding

7.8

Overall

7.8

Crew

8.4

Food

7.2

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
LOT
7.6
Good
1,069 reviews
KLM
7.8
Good
1,333 reviews

Entertainment

7.1

Boarding

7.8

Overall

7.8

Crew

8.4

Food

7.2

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Austrian Airlines
7.6
Good
780 reviews
KLM
7.8
Good
1,333 reviews

Entertainment

7.1

Boarding

7.8

Overall

7.8

Crew

8.4

Food

7.2

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
SWISS
7.5
Good
1,588 reviews
KLM
7.8
Good
1,333 reviews

Entertainment

7.1

Boarding

7.8

Overall

7.8

Crew

8.4

Food

7.2

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
United Airlines
7.4
Good
8,696 reviews
KLM
7.8
Good
1,333 reviews

Entertainment

7.1

Boarding

7.8

Overall

7.8

Crew

8.4

Food

7.2

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

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 British Airways, which is currently one of the cheapest options available, starting at $567. Air Serbia flights start at $568 while deals on SWISS start at $572 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, 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 $1,218). 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$498Average$934FlexibilityNo cancel feeOn-time77%
LOTCheapest$574Average$872FlexibilityNo cancel feeOn-time81%
KLMCheapest$578Average$739FlexibilityNo cancel feeOn-time75%
Austrian AirlinesCheapest$611Average$984FlexibilityNo cancel feeOn-time78%
SWISSCheapest$611Average$1,027FlexibilityNo cancel feeOn-time79%
LufthansaCheapest$614Average$1,124FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$618Average$851FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$628Average$824FlexibilityNo cancel feeOn-time70%
Air SerbiaCheapest$634Average$1,029FlexibilityNo cancel feeOn-timeN/A
ITA AirwaysCheapest$679Average$890FlexibilityNo cancel feeOn-time81%

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