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$353+ 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 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SOF
dic. 24 — dic. 311
mié. 12/24
mié. 12/31
1 adult, Economy
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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 noviembre 24, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/23. 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.
dom. 12/289:50 pmORD - SOF
1 stop16h 55mLufthansa
dom. 1/186:10 amSOF - ORD
1 stop17h 10mLufthansa
Deal found 11/23$559
This CrystalTravel deal was found by Cheapflights users on 11/23. 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.
mar. 11/259:50 pmORD - SOF
1 stop12h 30mLufthansa
lun. 12/82:20 pmSOF - ORD
1 stop13h 45mLufthansa
Deal found 11/23$574
This KAYAK deal was found by Cheapflights users on 11/22. 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.
mar. 12/309:45 pmORD - SOF
1 stop14h 25mBritish Airways
mié. 1/219:00 pmSOF - ORD
1 stop24h 50mBritish Airways
Deal found 11/22$591
This Gotogate deal was found by Cheapflights users on 11/24. 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.
mié. 12/312:50 pmORD - SOF
2 stops21h 30mMultiple Airlines
mié. 1/146:05 amSOF - ORD
1 stop20h 20mMultiple Airlines
Deal found 11/24$593
This Cheapflightsfares deal was found by Cheapflights users on 11/23. 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.
dom. 12/289:50 pmORD - SOF
1 stop16h 55mLufthansa
lun. 3/22:20 pmSOF - ORD
1 stop13h 45mLufthansa
Deal found 11/23$595
This Cheapflightsfares deal was found by Cheapflights users on 11/23. 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.
mié. 11/266:00 pmORD - SOF
1 stop11h 15mLufthansa
vie. 12/56:05 amSOF - ORD
1 stop16h 05mLufthansa
Deal found 11/23$596
This Mytrip deal was found by Cheapflights users on 11/23. 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.
mar. 11/2510:00 amORD - SOF
2 stops24h 20mMultiple Airlines
lun. 12/82:20 pmSOF - ORD
1 stop13h 45mMultiple Airlines
Deal found 11/23$597
This Mytrip deal was found by Cheapflights users on 11/21. 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.
mar. 12/99:50 pmORD - SOF
1 stop16h 55mMultiple Airlines
vie. 2/206:05 amSOF - ORD
2 stops19h 43mMultiple Airlines
Deal found 11/21$600
This LOT deal was found by Cheapflights users on 11/23. 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.
jue. 12/49:55 pmORD - SOF
1 stop31h 55mLOT
sáb. 12/132:35 pmSOF - ORD
1 stop13h 25mLOT
Deal found 11/23$602
This FlightHub deal was found by Cheapflights users on 11/23. 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.
mar. 11/259:50 pmORD - SOF
1 stop12h 30mLufthansa
lun. 3/26:10 amSOF - ORD
1 stop17h 10mLufthansa
Deal found 11/23$603
This FlightHub deal was found by Cheapflights users on 11/23. 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.
mar. 11/259:50 pmORD - SOF
1 stop12h 30mLufthansa
dom. 3/12:25 pmSOF - ORD
1 stop13h 40mLufthansa
Deal found 11/23$604
This Air France deal was found by Cheapflights users on 11/23. 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.
mié. 11/261:47 pmMDW - SOF
2 stops16h 18mMultiple Airlines
lun. 3/27:00 amSOF - MDW
2 stops18h 45mMultiple Airlines
Deal found 11/23$623

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 noviembre 24, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$555
(Kiwi.com)

One-way from

$353
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$641
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. 25% potential increase in price ($256 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 noviembre 24, 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

lun. 12/8

9:50 pm-6:20 pm

1 stop12h 30m

Sofia

sáb. 1/17

6:25 am-3:20 pm

1 stop16h 55m

$607

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

dom. 12/28

9:50 pm-10:45 pm

1 stop16h 55m

Sofia

jue. 1/15

6:00 am-3:20 pm

1 stop17h 20m

$607

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

dom. 12/7

9:50 pm-10:45 pm

1 stop16h 55m

Sofia

mié. 1/14

6:10 am-2:55 pm

2 stops16h 45m

$607

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

lun. 12/8

9:50 pm-10:45 pm

1 stop16h 55m

Sofia

mié. 1/14

6:10 am-2:55 pm

2 stops16h 45m

$607

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

dom. 12/28

9:50 pm-10:45 pm

1 stop16h 55m

Sofia

mié. 1/21

6:10 am-8:10 pm

2 stops22h 00m

$607

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

dom. 12/28

9:50 pm-10:45 pm

1 stop16h 55m

Sofia

mar. 1/20

6:00 am-11:10 am

1 stop13h 10m

$607

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

mié. 1/21

6:00 pm-1:15 pm

1 stop11h 15m

Sofia

dom. 1/25

6:10 am-3:20 pm

1 stop17h 10m

$608

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

lun. 1/12

6:00 pm-1:15 pm

1 stop11h 15m

Sofia

mar. 1/27

6:00 am-6:51 pm

2 stops20h 51m

$608

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

vie. 2/20

6:00 pm-10:45 pm

1 stop20h 45m

Sofia

mar. 4/21

6:10 am-11:00 am

1 stop12h 50m

$608

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

vie. 2/27

6:00 pm-10:45 pm

1 stop20h 45m

Sofia

mar. 3/31

6:10 am-11:00 am

1 stop12h 50m

$608

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/22

Showing 1-10 of 39 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, January is the cheapest month in which you can book a flight from Chicago to Bulgaria (average of $481). Flying from Chicago to Bulgaria in June is currently the most expensive (average of $826). 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 noviembre 24, 2025.

It’s typically best to fly out from Chicago to Bulgaria in the evening. Doing so could potentially save you 16% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Chicago to Bulgaria?

Use this chart to determine the cheapest time to fly round-trip from Chicago to Bulgaria. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Chicago to Bulgaria flight should consider departing on Tuesday mornings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 noviembre 24, 2025.
Peruse reviews from past customers who have flown with LOT, SWISS, 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.
LOT
7.5
Good
1,138 reviews

Entertainment

6.9

Boarding

7.6

Crew

8.2

Comfort

7.5

Overall

7.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Rami,Sep 2025

LAX - WAW

The second leg. Very tight seats No WiFi on both flights
LOT
7.5
Good
1,138 reviews
LOT
7.5
Good
1,138 reviews

Entertainment

6.9

Boarding

7.6

Crew

8.2

Comfort

7.5

Overall

7.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Rami,Sep 2025

LAX - WAW

The second leg. Very tight seats No WiFi on both flights
SWISS
7.5
Good
1,790 reviews
LOT
7.5
Good
1,138 reviews

Entertainment

6.9

Boarding

7.6

Crew

8.2

Comfort

7.5

Overall

7.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Rami,Sep 2025

LAX - WAW

The second leg. Very tight seats No WiFi on both flights
United Airlines
7.4
Good
9,039 reviews
LOT
7.5
Good
1,138 reviews

Entertainment

6.9

Boarding

7.6

Crew

8.2

Comfort

7.5

Overall

7.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Rami,Sep 2025

LAX - WAW

The second leg. Very tight seats No WiFi on both flights
Turkish Airlines
7.3
Good
4,050 reviews
LOT
7.5
Good
1,138 reviews

Entertainment

6.9

Boarding

7.6

Crew

8.2

Comfort

7.5

Overall

7.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Rami,Sep 2025

LAX - WAW

The second leg. Very tight seats No WiFi on both flights
Lufthansa
6.8
Okay
7,583 reviews
LOT
7.5
Good
1,138 reviews

Entertainment

6.9

Boarding

7.6

Crew

8.2

Comfort

7.5

Overall

7.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Rami,Sep 2025

LAX - WAW

The second leg. Very tight seats No WiFi on both flights

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 $607, United Airlines can have you in Bulgaria from Chicago in 12h 30m. 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, January is the cheapest month in which you can book a flight from Chicago to Bulgaria (average of $481). Flying from Chicago to Bulgaria in June is currently the most expensive (average of $826). 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 noviembre 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$511Average$936FlexibilityNo cancel feeOn-time77%
KLMCheapest$533Average$696FlexibilityNo cancel feeOn-time75%
LOTCheapest$570Average$967FlexibilityNo cancel feeOn-time81%
Air FranceCheapest$585Average$624FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$590Average$883FlexibilityNo cancel feeOn-time76%
SWISSCheapest$593Average$808FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$600Average$791FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$606Average$883FlexibilityNo cancel feeOn-time78%
British AirwaysCheapest$611Average$759FlexibilityNo cancel feeOn-time70%
Air SerbiaCheapest$634Average$1,010FlexibilityNo cancel feeOn-timeN/A

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