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$442+ 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SOF
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from Chicago to Bulgaria

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Bulgaria (BG0). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$534
(CrystalTravel)

One-way from

$442
(Kiwi.com)
From Chicago (CHI) to Bulgaria
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One-way flight from Chicago (CHI) to Bulgaria
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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 January 21, 2025.

This CrystalTravel deal was found by Cheapflights users on 1/21. 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.
Sun 3/169:30 pmORD - SOF
1 stop16h 20mTurkish Airlines
Mon 3/249:40 pmSOF - ORD
1 stop20h 30mTurkish Airlines
Deal found 1/21$534
This FlightHub deal was found by Cheapflights users on 1/21. 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 2/69:55 pmORD - SOF
1 stop11h 55mLOT
Fri 2/212:35 pmSOF - ORD
1 stop13h 25mLOT
Deal found 1/21$540
This Mytrip deal was found by Cheapflights users on 1/21. 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.
Sun 3/1611:35 amORD - SOF
2 stops28h 10mMultiple Airlines
Mon 3/2410:55 pmSOF - ORD
2 stops28h 00mMultiple Airlines
Deal found 1/21$606
This Gotogate deal was found by Cheapflights users on 1/21. 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.
Wed 3/57:20 amORD - SOF
2 stops26h 30mAir Canada
Wed 3/126:00 amSOF - ORD
2 stops20h 55mAir Canada
Deal found 1/21$628
This British Airways deal was found by Cheapflights users on 1/21. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/25:00 pmORD - SOF
1 stop15h 20mBritish Airways
Mon 2/175:25 pmSOF - ORD
1 stop28h 30mBritish Airways
Deal found 1/21$629
This United Airlines deal was found by Cheapflights users on 1/21. 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 1/296:00 pmORD - SOF
1 stop16h 10mUnited Airlines
Thu 2/136:10 amSOF - ORD
2 stops36h 44mUnited Airlines
Deal found 1/21$632
This Air Serbia deal was found by Cheapflights users on 1/21. 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.
Sat 8/2311:20 pmORD - SOF
1 stop32h 15mAir Serbia
Sun 9/144:05 pmSOF - ORD
1 stop32h 35mAir Serbia
Deal found 1/21$650
This Lufthansa deal was found by Cheapflights users on 1/21. 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.
Sun 2/99:25 pmORD - SOF
1 stop12h 45mLufthansa
Mon 2/246:55 pmSOF - ORD
1 stop31h 30mLufthansa
Deal found 1/21$652
This Air France deal was found by Cheapflights users on 1/21. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/51:26 pmMDW - SOF
2 stops16h 39mMultiple Airlines
Wed 2/197:00 amSOF - MDW
2 stops18h 43mMultiple Airlines
Deal found 1/21$655
This Air France deal was found by Cheapflights users on 1/21. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/3012:15 pmORD - SOF
2 stops17h 40mAir France
Thu 2/137:10 amSOF - ORD
1 stop15h 55mAir France
Deal found 1/21$664
This KLM deal was found by Cheapflights users on 1/21. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/612:45 pmORD - SOF
2 stops17h 20mKLM
Fri 2/217:00 amSOF - ORD
1 stop15h 30mKLM
Deal found 1/21$666
This SWISS deal was found by Cheapflights users on 1/21. 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.
Wed 1/227:05 pmORD - SOF
1 stop12h 10mSWISS
Thu 2/134:00 pmSOF - ORD
1 stop32h 15mSWISS
Deal found 1/21$668

Find flights from Chicago to Bulgaria within your budget

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 January 21, 2025.

Fly from

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Fly to

Any airport

Route

Depart

Return

Price

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 3/16

9:30 pm-8:50 pm

1 stop16h 20m

Sofia

Mon 3/24

9:40 pm-11:10 am

1 stop20h 30m

$534

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 2/6

9:55 pm-5:50 pm

1 stop11h 55m

Sofia

Fri 2/21

2:35 pm-8:00 pm

1 stop13h 25m

$540

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 3/16

11:35 am-10:45 pm

2 stops28h 10m

Sofia

Mon 3/24

10:55 pm-7:55 pm

2 stops28h 00m

$606

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 3/5

7:20 am-5:50 pm

2 stops26h 30m

Sofia

Wed 3/12

6:00 am-7:55 pm

2 stops20h 55m

$628

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 2/2

5:00 pm-4:20 pm

1 stop15h 20m

Sofia

Mon 2/17

5:25 pm-1:55 pm

1 stop28h 30m

$629

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 1/29

6:00 pm-6:10 pm

1 stop16h 10m

Sofia

Thu 2/13

6:10 am-10:54 am

2 stops36h 44m

$632

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 2/9

9:25 pm-6:10 pm

1 stop12h 45m

Sofia

Mon 2/24

6:55 pm-6:25 pm

1 stop31h 30m

$652

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Wed 2/5

1:26 pm-2:05 pm

2 stops16h 39m

Sofia

Wed 2/19

7:00 am-5:43 pm

2 stops18h 43m

$655

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 1/31

7:05 pm-6:10 pm

2 stops15h 05m

Sofia

Mon 2/10

3:00 pm-4:15 pm

1 stop33h 15m

$662

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 1/30

12:15 pm-1:55 pm

2 stops17h 40m

Sofia

Thu 2/13

7:10 am-3:05 pm

1 stop15h 55m

$664

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 24 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.

Travel insights for flights from Chicago to Bulgaria

Get recent, data-driven insights about flights from Chicago to Bulgaria including ideal travel times, pricing trends, and more.

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 $1,243). 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 January 21, 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 January 21, 2025.
Read through reviews of airlines operating flights from Chicago to Bulgaria, such as Turkish Airlines, Air Canada and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,341 reviews

Boarding

7.8

Food

7.3

Overall

7.8

Crew

8.4

Comfort

7.7

Entertainment

7.2

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

KLM
7.8
Good
1,341 reviews
KLM
7.8
Good
1,341 reviews

Boarding

7.8

Food

7.3

Overall

7.8

Crew

8.4

Comfort

7.7

Entertainment

7.2

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

LOT
7.6
Good
1,117 reviews
KLM
7.8
Good
1,341 reviews

Boarding

7.8

Food

7.3

Overall

7.8

Crew

8.4

Comfort

7.7

Entertainment

7.2

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Austrian Airlines
7.6
Good
786 reviews
KLM
7.8
Good
1,341 reviews

Boarding

7.8

Food

7.3

Overall

7.8

Crew

8.4

Comfort

7.7

Entertainment

7.2

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

SWISS
7.5
Good
1,600 reviews
KLM
7.8
Good
1,341 reviews

Boarding

7.8

Food

7.3

Overall

7.8

Crew

8.4

Comfort

7.7

Entertainment

7.2

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

United Airlines
7.4
Good
8,985 reviews
KLM
7.8
Good
1,341 reviews

Boarding

7.8

Food

7.3

Overall

7.8

Crew

8.4

Comfort

7.7

Entertainment

7.2

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

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 $466. KLM flights start at $504 while deals on TAP AIR PORTUGAL start at $555 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 $1,243). 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.

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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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$497Average$946FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$568Average$919FlexibilityNo cancel feeOn-time70%
KLMCheapest$569Average$738FlexibilityNo cancel feeOn-time75%
LOTCheapest$584Average$890FlexibilityNo cancel feeOn-time81%
Austrian AirlinesCheapest$591Average$922FlexibilityNo cancel feeOn-time78%
LufthansaCheapest$624Average$1,084FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$628Average$905FlexibilityNo cancel feeOn-time69%
ITA AirwaysCheapest$650Average$817FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$682Average$984FlexibilityNo cancel feeOn-time67%
SWISSCheapest$729Average$1,126FlexibilityNo cancel feeOn-time79%
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