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$395+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — ORD
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
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 April 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$645
(United Airlines)

One-way from

$395
(SmartFares)

Popular in

January

Cheapest in

November

Average price

$679
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. 3% potential increase in price ($25 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($14 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 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 April 2, 2025.

This United Airlines deal was found by Cheapflights users on 3/31. 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.
Tue 4/296:20 amSOF - ORD
2 stops16h 35mUnited Airlines
Wed 5/289:40 pmORD - SOF
1 stop17h 20mUnited Airlines
Deal found 3/31$645
This Air France deal was found by Cheapflights users on 4/1. 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 6/197:00 amSOF - MDW
2 stops18h 45mMultiple Airlines
Mon 6/301:09 pmMDW - SOF
2 stops16h 51mMultiple Airlines
Deal found 4/1$648
This KLM deal was found by Cheapflights users on 3/31. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/197:00 amSOF - ORD
2 stops21h 10mKLM
Sun 4/201:25 pmORD - SOF
2 stops16h 35mKLM
Deal found 3/31$652
This Expedia deal was found by Cheapflights users on 3/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/156:15 amSOF - ORD
2 stops21h 57mAir Canada
Wed 5/218:25 pmORD - SOF
2 stops30h 50mAir Canada
Deal found 3/31$661
This Lufthansa deal was found by Cheapflights users on 4/1. 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.
Wed 4/166:00 amSOF - ORD
1 stop15h 55mLufthansa
Sun 5/49:40 pmORD - SOF
1 stop17h 20mLufthansa
Deal found 4/1$667
This FlightHub deal was found by Cheapflights users on 3/31. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/119:15 pmSOF - ORD
1 stop20h 25mTurkish Airlines
Sat 4/197:50 pmORD - SOF
1 stop16h 35mTurkish Airlines
Deal found 3/31$675
This Gotogate deal was found by Cheapflights users on 3/31. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/178:00 amSOF - ORD
1 stop13h 20mMultiple Airlines
Wed 4/302:05 pmORD - SOF
2 stops20h 35mMultiple Airlines
Deal found 3/31$677
This American Airlines deal was found by Cheapflights users on 4/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/119:10 pmSOF - ORD
1 stop22h 35mAmerican Airlines
Thu 6/1212:04 pmORD - SOF
2 stops17h 26mAmerican Airlines
Deal found 4/1$688
This Austrian Airlines deal was found by Cheapflights users on 4/1. 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 4/1311:05 amVAR - ORD
2 stops33h 40mAustrian Airlines
Sun 4/204:20 pmORD - VAR
1 stop14h 55mAustrian Airlines
Deal found 4/1$698
This Austrian Airlines deal was found by Cheapflights users on 4/1. 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 4/298:00 amSOF - ORD
2 stops18h 26mAustrian Airlines
Thu 5/159:20 pmORD - SOF
2 stops30h 20mAustrian Airlines
Deal found 4/1$699
This SWISS deal was found by Cheapflights users on 4/1. 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.
Sat 4/1912:45 pmSOF - ORD
2 stops35h 10mSWISS
Mon 5/56:05 pmORD - SOF
2 stops56h 00mSWISS
Deal found 4/1$715
This Lufthansa deal was found by Cheapflights users on 4/1. 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 4/134:00 pmVAR - ORD
2 stops28h 55mLufthansa
Sun 4/209:40 pmORD - VAR
2 stops33h 35mLufthansa
Deal found 4/1$725

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 April 2, 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

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 4/29

6:20 am-2:55 pm

2 stops16h 35m

Chicago O'Hare Intl

Wed 5/28

9:40 pm-11:00 pm

1 stop17h 20m

$645

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Thu 6/19

7:00 am-5:45 pm

2 stops18h 45m

Chicago Midway

Mon 6/30

1:09 pm-2:00 pm

2 stops16h 51m

$648

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 4/19

7:00 am-8:10 pm

2 stops21h 10m

Chicago O'Hare Intl

Sun 4/20

1:25 pm-2:00 pm

2 stops16h 35m

$652

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 5/15

6:15 am-8:12 pm

2 stops21h 57m

Chicago O'Hare Intl

Wed 5/21

8:25 pm-11:15 am

2 stops30h 50m

$661

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 4/16

6:00 am-1:55 pm

1 stop15h 55m

Chicago O'Hare Intl

Sun 5/4

9:40 pm-11:00 pm

1 stop17h 20m

$667

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 4/11

9:15 pm-9:40 am

1 stop20h 25m

Chicago O'Hare Intl

Sat 4/19

7:50 pm-8:25 pm

1 stop16h 35m

$675

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 4/17

8:00 am-1:20 pm

1 stop13h 20m

Chicago O'Hare Intl

Wed 4/30

2:05 pm-6:40 pm

2 stops20h 35m

$677

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 5/11

9:10 pm-11:45 am

1 stop22h 35m

Chicago O'Hare Intl

Thu 6/12

12:04 pm-1:30 pm

2 stops17h 26m

$688

VarnaChicago

VAR - ORD

VARORD

Varna

Sun 4/13

11:05 am-12:45 pm

2 stops33h 40m

Chicago O'Hare Intl

Sun 4/20

4:20 pm-3:15 pm

1 stop14h 55m

$698

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 4/29

8:00 am-6:26 pm

2 stops18h 26m

Chicago O'Hare Intl

Thu 5/15

9:20 pm-11:40 am

2 stops30h 20m

$699

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 32 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, August is the cheapest month in which you can book a flight from Bulgaria to Illinois (average of $245). Flying from Bulgaria to Illinois in March is currently the most expensive (average of $323). 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 April 2, 2025.

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

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 April 2, 2025.
Read through reviews of airlines operating flights from Bulgaria to Illinois, such as KLM, LOT and Austrian Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,323 reviews

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

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
1,323 reviews
KLM
7.8
Good
1,323 reviews

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

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
1,065 reviews
KLM
7.8
Good
1,323 reviews

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

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
771 reviews
KLM
7.8
Good
1,323 reviews

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

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
1,572 reviews
KLM
7.8
Good
1,323 reviews

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

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.
Qatar Airways
7.4
Good
3,540 reviews
KLM
7.8
Good
1,323 reviews

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

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 Bulgaria to Illinois. 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 Bulgaria to Illinois one-way?

    The cheapest airlines for a one-way flight from Bulgaria to Illinois are Air Serbia ($395), Qatar Airways ($544), and Aer Lingus ($552).

  • 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, August is the cheapest month in which you can book a flight from Bulgaria to Illinois (average of $245). Flying from Bulgaria to Illinois in March is currently the most expensive (average of $323). 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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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 April 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$460Average$777FlexibilityNo cancel feeOn-time75%
LOTCheapest$490Average$638FlexibilityNo cancel feeOn-time81%
British AirwaysCheapest$546Average$864FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$560Average$672FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$576Average$858FlexibilityNo cancel feeOn-time78%
LufthansaCheapest$594Average$771FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$601Average$799FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$603Average$723FlexibilityNo cancel feeOn-time69%

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