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Bulgaria

$246+ Cheap flights from Illinois 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 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SOF
ago. 5 — ago. 121
mar. 8/5
mar. 8/12
1 adult, Economy
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Cheap flight deals from Illinois to Bulgaria

Keep the following information in mind while searching for Illinois to Bulgaria flight deals. Data was last updated julio 31, 2025.

Round-trip from

$559
(CheapOair)

One-way from

$250
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$884
From Illinois to Bulgaria
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One-way flight from Illinois to Bulgaria
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Highest demand for flights based on searches. 26% potential increase in price ($264 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Illinois to Bulgaria

Cheapest flights from Illinois to Bulgaria
Explore the most affordable flight options available from Illinois to Bulgaria. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 31, 2025.

This CheapOair deal was found by Cheapflights users on 7/31. 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.
mié. 9/310:40 amORD - SOF
2 stops15h 25mMultiple Airlines
mié. 9/176:00 amSOF - ORD
1 stop14h 30mMultiple Airlines
Deal found 7/31$559
This SWISS deal was found by Cheapflights users on 7/31. 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.
lun. 9/227:05 pmORD - SOF
2 stops32h 55mSWISS
lun. 10/612:45 pmSOF - ORD
2 stops35h 10mSWISS
Deal found 7/31$560
This CheapOair deal was found by Cheapflights users on 7/31. 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.
lun. 8/1811:45 pmORD - VAR
1 stop25h 00mTurkish Airlines
mié. 9/310:10 pmVAR - ORD
1 stop19h 30mTurkish Airlines
Deal found 7/31$563
This Turkish Airlines deal was found by Cheapflights users on 7/31. 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.
lun. 8/1111:45 pmORD - SOF
1 stop31h 00mTurkish Airlines
mié. 9/173:35 pmSOF - ORD
1 stop26h 05mTurkish Airlines
Deal found 7/31$563
This Orbitz deal was found by Cheapflights users on 7/30. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/54:55 pmORD - SOF
1 stop18h 15mBritish Airways
mié. 2/259:00 pmSOF - ORD
2 stops30h 18mBritish Airways
Deal found 7/30$566
This Lufthansa deal was found by Cheapflights users on 7/31. 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.
dom. 8/173:35 pmORD - SOF
1 stop12h 25mLufthansa
mié. 9/176:00 amSOF - ORD
1 stop14h 30mLufthansa
Deal found 7/31$577
This United Airlines deal was found by Cheapflights users on 7/31. 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.
mar. 9/169:40 pmORD - SOF
1 stop17h 20mUnited Airlines
sáb. 9/276:15 amSOF - ORD
2 stops20h 19mUnited Airlines
Deal found 7/31$581
This Mytrip deal was found by Cheapflights users on 7/31. 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.
jue. 8/218:40 amORD - SOF
2 stops25h 10mAir Canada
jue. 9/46:00 amSOF - ORD
2 stops35h 51mAir Canada
Deal found 7/31$586
This deal was found by Cheapflights users on 7/31. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/164:20 pmORD - SOF
1 stop15h 00mAustrian Airlines
lun. 10/68:00 amSOF - ORD
1 stop13h 20mAustrian Airlines
Deal found 7/31$587
This Kiwi.com deal was found by Cheapflights users on 7/31. 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.
lun. 8/184:20 pmORD - VAR
1 stop14h 35mMultiple Airlines
mié. 9/39:30 pmVAR - ORD
2 stops23h 25mMultiple Airlines
Deal found 7/31$600
This Cheapflightsfares deal was found by Cheapflights users on 7/30. 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. 10/112:55 pmORD - VAR
2 stops18h 20mAustrian Airlines
dom. 10/59:35 pmVAR - ORD
1 stop23h 45mAustrian Airlines
Deal found 7/30$617
This Lufthansa deal was found by Cheapflights users on 7/31. 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.
mar. 8/264:00 pmORD - VAR
2 stops15h 15mLufthansa
mié. 9/179:30 pmVAR - ORD
1 stop28h 45mLufthansa
Deal found 7/31$629

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois 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 julio 31, 2025.
Use the filters below to find and compare flights from Illinois to Bulgaria that are best for you.

Fly from

Illinois

Fly to

Bulgaria

Route

Depart

Return

Price

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

mié. 9/3

10:40 am-10:05 am

2 stops15h 25m

Sofia

mié. 9/17

6:00 am-12:30 pm

1 stop14h 30m

$559

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

lun. 9/22

7:05 pm-12:00 pm

2 stops32h 55m

Sofia

lun. 10/6

12:45 pm-3:55 pm

2 stops35h 10m

$560

ChicagoVarna

ORD - VAR

ORDVAR

Chicago O'Hare Intl

lun. 8/18

11:45 pm-8:45 am

1 stop25h 00m

Varna

mié. 9/3

10:10 pm-9:40 am

1 stop19h 30m

$563

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

lun. 8/11

11:45 pm-2:45 pm

1 stop31h 00m

Sofia

mié. 9/17

3:35 pm-9:40 am

1 stop26h 05m

$563

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

dom. 10/5

4:55 pm-7:10 pm

1 stop18h 15m

Sofia

mié. 2/25

9:00 pm-7:18 pm

2 stops30h 18m

$566

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

dom. 8/17

3:35 pm-12:00 pm

1 stop12h 25m

Sofia

mié. 9/17

6:00 am-12:30 pm

1 stop14h 30m

$577

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

mar. 9/16

9:40 pm-11:00 pm

1 stop17h 20m

Sofia

sáb. 9/27

6:15 am-6:34 pm

2 stops20h 19m

$581

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

jue. 8/21

8:40 am-5:50 pm

2 stops25h 10m

Sofia

jue. 9/4

6:00 am-9:51 am

2 stops35h 51m

$586

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

mar. 9/16

4:20 pm-3:20 pm

1 stop15h 00m

Sofia

lun. 10/6

8:00 am-1:20 pm

1 stop13h 20m

$587

ChicagoVarna

ORD - VAR

ORDVAR

Chicago O'Hare Intl

lun. 8/18

4:20 pm-2:55 pm

1 stop14h 35m

Varna

mié. 9/3

9:30 pm-12:55 pm

2 stops23h 25m

$600

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 33 results
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Best time to book a flight from Illinois to Bulgaria

Have a flexible travel schedule? Discover the best time to fly to Bulgaria from Illinois 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 Illinois to Bulgaria

What is the cheapest month to book a flight from Illinois to Bulgaria?

Currently, November is the cheapest month in which you can book a flight from Illinois to Bulgaria (average of $632). Flying from Illinois to Bulgaria in June is currently the most expensive (average of $1,187). 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 IL to BG?

Find hourly flight availability from Illinois 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 julio 31, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Bulgaria as you normally would.

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 julio 31, 2025.
Read reviews from past customers who have flown KLM, Austrian Airlines, and Air France from Illinois to Bulgaria. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,383 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Austrian Airlines
7.6
Good
823 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Air France
7.5
Good
1,465 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
SWISS
7.5
Good
1,686 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
United Airlines
7.4
Good
8,900 reviews
KLM
7.8
Good
1,383 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Related info for your journey

Find useful and relevant information for your journey from Illinois 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 Illinois to Bulgaria one-way?

    One-way options have recently been found by users for as low as $289 on Turkish Airlines. Other airlines that offer cheap prices include British Airways from $341 and SWISS from $344 one-way.

  • Can I find deals for flights from Illinois to Bulgaria that include hotel bookings?

    Yes. In addition to deals on Illinois to Bulgaria flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Bulgaria?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Bulgaria.

  • Can I find deals for business class flights from Illinois to Bulgaria?

    Yes. Cheapflights offers flight deals from Illinois 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 Illinois to Bulgaria?

    Currently, November is the cheapest month in which you can book a flight from Illinois to Bulgaria (average of $632). Flying from Illinois to Bulgaria in June is currently the most expensive (average of $1,187). 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 Illinois to Bulgaria

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Top 10 airlines flying from Illinois to Bulgaria

Discover the top 10 airlines that operate flights from Illinois 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 julio 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$494Average$929FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$498Average$608FlexibilityNo cancel feeOn-time77%
KLMCheapest$533Average$739FlexibilityNo cancel feeOn-time75%
LOTCheapest$571Average$870FlexibilityNo cancel feeOn-time81%
LufthansaCheapest$588Average$1,080FlexibilityNo cancel feeOn-time76%
Austrian AirlinesCheapest$588Average$877FlexibilityNo cancel feeOn-time78%
SWISSCheapest$596Average$847FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$601Average$787FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$613Average$778FlexibilityNo cancel feeOn-time70%
Air SerbiaCheapest$652Average$1,020FlexibilityNo cancel feeOn-timeN/A

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