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$365+ Cheap flights from Bulgaria to Illinois

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 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — ORD
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
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Cheap flight deals from Bulgaria to Illinois

Keep the following information in mind while searching for Bulgaria to Illinois flight deals. Data was last updated November 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$623
(FlightHub)

One-way from

$365
(Kiwi.com)

Popular in

May

Cheapest in

February

Average price

$781
Provider with most accurate pricing for Sofia-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Sofia-Chicago (CHI) flights.
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From Bulgaria to Illinois
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One-way flight from Bulgaria to Illinois
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Highest demand for flights based on searches. 1% potential increase in price ($12 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Bulgaria to Illinois

Cheapest flights from Bulgaria to Illinois
Explore the most affordable flight options available from Bulgaria to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 26, 2025.

This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1410:00 amVAR - ORD
1 stop32h 05mTurkish Airlines
Sat 1/3111:50 amORD - VAR
1 stop13h 20mTurkish Airlines
Deal found 11/24$623
This KLM deal was found by Cheapflights users on 11/26. 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.
Fri 12/127:00 amSOF - ORD
1 stop15h 20mMultiple Airlines
Tue 2/35:20 pmORD - SOF
1 stop12h 35mMultiple Airlines
Deal found 11/26$679
This KLM deal was found by Cheapflights users on 11/26. 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.
Wed 12/107:00 amSOF - ORD
1 stop15h 20mMultiple Airlines
Tue 2/31:58 pmORD - SOF
2 stops15h 57mMultiple Airlines
Deal found 11/26$683
This Kiwi.com deal was found by Cheapflights users on 11/26. 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.
Thu 12/116:00 amSOF - ORD
1 stop13h 10mMultiple Airlines
Wed 2/41:00 pmORD - SOF
2 stops14h 50mMultiple Airlines
Deal found 11/26$684
This KLM deal was found by Cheapflights users on 11/25. 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.
Wed 12/107:00 amSOF - ORD
1 stop15h 20mKLM
Thu 2/51:58 pmORD - SOF
2 stops16h 07mKLM
Deal found 11/25$688
This KLM deal was found by Cheapflights users on 11/26. 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 12/117:00 amSOF - ORD
2 stops18h 46mMultiple Airlines
Tue 2/35:20 pmORD - SOF
1 stop12h 35mMultiple Airlines
Deal found 11/26$689
This KLM deal was found by Cheapflights users on 11/26. 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.
Wed 12/107:00 amSOF - ORD
2 stops18h 46mMultiple Airlines
Wed 2/41:58 pmORD - SOF
2 stops16h 07mMultiple Airlines
Deal found 11/26$693
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.
Mon 12/156:05 amSOF - ORD
2 stops15h 05mLufthansa
Thu 1/224:20 pmORD - SOF
1 stop13h 30mLufthansa
Deal found 11/23$694
This Air France 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/147:00 amSOF - ORD
1 stop16h 10mMultiple Airlines
Thu 1/221:58 pmORD - SOF
2 stops16h 07mMultiple Airlines
Deal found 11/24$695
This Turkish Airlines deal was found by Cheapflights users on 11/26. 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.
Thu 12/119:40 pmSOF - ORD
1 stop20h 25mTurkish Airlines
Fri 2/68:20 pmORD - SOF
1 stop16h 30mTurkish Airlines
Deal found 11/26$698
This British Airways deal was found by Cheapflights users on 11/26. 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.
Sat 12/1312:05 pmSOF - ORD
2 stops27h 16mBritish Airways
Sat 2/77:34 pmORD - SOF
2 stops36h 46mBritish Airways
Deal found 11/26$700
This KLM deal was found by Cheapflights users on 11/26. 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.
Fri 12/127:00 amSOF - ORD
1 stop15h 20mKLM
Sat 6/64:20 pmORD - SOF
1 stop13h 40mKLM
Deal found 11/26$703

Cheapflights Fare Finder

 
Customize your flight search to find flights from Bulgaria to Illinois 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 November 26, 2025.
Use the filters below to find and compare flights from Bulgaria to Illinois that are best for you.

Fly from

Bulgaria

Fly to

Illinois

Route

Depart

Return

Price

VarnaChicago

VAR - ORD

VARORD

Varna

Sun 12/14

10:00 am-10:05 am

1 stop32h 05m

Chicago O'Hare Intl

Sat 1/31

11:50 am-9:10 am

1 stop13h 20m

$623

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 12/12

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Thu 2/5

5:20 pm-1:55 pm

1 stop12h 35m

$679

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 12/13

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Thu 1/22

5:20 pm-1:55 pm

1 stop12h 35m

$679

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 12/10

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Wed 2/4

1:58 pm-2:05 pm

2 stops16h 07m

$683

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 12/12

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Wed 2/4

4:25 pm-2:05 pm

1 stop13h 40m

$684

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 2/5

7:00 am-5:45 pm

2 stops18h 45m

Chicago O'Hare Intl

Wed 4/1

4:20 pm-2:00 pm

1 stop13h 40m

$684

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Thu 1/15

7:00 am-6:32 pm

2 stops19h 32m

Chicago Midway

Wed 1/28

1:49 pm-2:05 pm

2 stops16h 16m

$684

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 12/13

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Thu 1/22

12:30 pm-2:05 pm

2 stops17h 35m

$689

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 12/12

7:00 am-6:02 pm

2 stops19h 02m

Chicago O'Hare Intl

Wed 2/4

1:58 pm-2:05 pm

2 stops16h 07m

$693

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 12/11

7:00 am-5:46 pm

2 stops18h 46m

Chicago O'Hare Intl

Tue 2/3

1:58 pm-1:55 pm

2 stops15h 57m

$693

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/26

Showing 1-10 of 22 results
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Best time to book a flight from Bulgaria to Illinois

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

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

Currently, February is the cheapest month in which you can book a flight from Bulgaria to Illinois (average of $524). Flying from Bulgaria to Illinois in August is currently the most expensive (average of $671). 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 BG to IL?

Find hourly flight availability from Bulgaria to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 26, 2025.

A simple way to save on the total cost of your ticket is to fly from Bulgaria to Illinois at noon. If you’re flexible enough to do this you can expect to save up to 23% on your trip compared to booking a flight in the morning.

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

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

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

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated November 26, 2025.
Peruse reviews from past customers who have flown with KLM, LOT, and United Airlines from Bulgaria to Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,422 reviews

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,422 reviews
KLM
7.7
Good
1,422 reviews

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
LOT
7.5
Good
1,140 reviews
KLM
7.7
Good
1,422 reviews

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
United Airlines
7.4
Good
9,046 reviews
KLM
7.7
Good
1,422 reviews

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Turkish Airlines
7.3
Good
4,059 reviews
KLM
7.7
Good
1,422 reviews

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Lufthansa
6.8
Okay
7,594 reviews
KLM
7.7
Good
1,422 reviews

Food

7.2

Boarding

7.8

Comfort

7.6

Crew

8.4

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Related info for your journey

Find useful and relevant information for your journey from Bulgaria to Illinois. 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 Bulgaria to Illinois?

    Airlines like Turkish Airlines, KLM, and Lufthansa fly from Bulgaria to Illinois in about 15h 20m. The time it takes to get you to your destination can typically vary by up to 20h 45m. Bulgaria and Illinois are separated by a distance of 5194 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Bulgaria to Illinois (average of $524). Flying from Bulgaria to Illinois in August is currently the most expensive (average of $671). 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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See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Bulgaria to Illinois

Discover the top 8 airlines that operate flights from Bulgaria to Illinois. 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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
LOTCheapest$532Average$668FlexibilityNo cancel feeOn-time81%
British AirwaysCheapest$546Average$619FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$560Average$670FlexibilityNo cancel feeOn-time77%
Turkish AirlinesCheapest$601Average$783FlexibilityNo cancel feeOn-time77%
KLMCheapest$607Average$740FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$637Average$764FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$642Average$766FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$654Average$771FlexibilityNo cancel feeOn-time78%

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