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$351+ 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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — ORD
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$629
(KLM)

One-way from

$351
(Kiwi.com)

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. 2% potential increase in price ($22 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($13 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 17, 2025.

This KLM deal was found by Cheapflights users on 4/17. 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.
Mon 4/287:00 amSOF - ORD
2 stops17h 08mKLM
Wed 5/144:50 pmORD - SOF
1 stop13h 10mKLM
Deal found 4/17$629
This Air France deal was found by Cheapflights users on 4/16. 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.
Tue 6/247:00 amSOF - ORD
2 stops18h 46mMultiple Airlines
Mon 7/141:31 pmORD - SOF
2 stops16h 29mMultiple Airlines
Deal found 4/16$630
This FlightHub deal was found by Cheapflights users on 4/17. 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 5/235:20 amSOF - ORD
1 stop22h 20mLOT
Sat 9/139:40 pmORD - SOF
1 stop32h 10mLOT
Deal found 4/17$641
This Air Canada deal was found by Cheapflights users on 4/17. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/266:15 amSOF - ORD
2 stops37h 09mAir Canada
Fri 9/1210:40 amORD - SOF
2 stops24h 00mAir Canada
Deal found 4/17$681
This Lufthansa deal was found by Cheapflights users on 4/17. 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.
Mon 5/266:00 amSOF - ORD
1 stop14h 30mLufthansa
Wed 9/109:40 pmORD - SOF
1 stop13h 00mLufthansa
Deal found 4/17$697
This United Airlines deal was found by Cheapflights users on 4/17. 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 7/96:15 amSOF - ORD
1 stop16h 40mUnited Airlines
Mon 9/810:40 amORD - SOF
2 stops28h 10mUnited Airlines
Deal found 4/17$700
This FlightHub deal was found by Cheapflights users on 4/17. 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 7/279:15 pmSOF - ORD
1 stop20h 25mTurkish Airlines
Sat 8/911:25 amORD - SOF
1 stop13h 10mTurkish Airlines
Deal found 4/17$718
This SWISS deal was found by Cheapflights users on 4/17. 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.
Mon 5/263:30 pmSOF - ORD
1 stop28h 40mSWISS
Mon 9/154:00 pmORD - SOF
2 stops34h 05mSWISS
Deal found 4/17$725
This American Airlines deal was found by Cheapflights users on 4/17. 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.
Fri 6/202:20 pmSOF - ORD
2 stops26h 21mAmerican Airlines
Sat 7/55:00 pmORD - SOF
2 stops19h 20mAmerican Airlines
Deal found 4/17$776
This British Airways deal was found by Cheapflights users on 4/16. 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.
Mon 4/288:00 pmSOF - ORD
1 stop25h 50mBritish Airways
Wed 5/149:15 pmORD - SOF
1 stop32h 15mBritish Airways
Deal found 4/16$799
This Air France deal was found by Cheapflights users on 4/17. 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 5/257:00 amSOF - ORD
1 stop16h 00mAir France
Sat 9/131:35 pmORD - SOF
2 stops16h 25mAir France
Deal found 4/17$844
This KLM deal was found by Cheapflights users on 4/17. 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 6/197:00 amSOF - MDW
2 stops19h 02mKLM
Mon 6/301:09 pmMDW - SOF
2 stops16h 51mKLM
Deal found 4/17$923

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 17, 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

Mon 4/28

7:00 am-4:08 pm

2 stops17h 08m

Chicago O'Hare Intl

Wed 5/14

4:50 pm-2:00 pm

1 stop13h 10m

$629

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 6/24

7:00 am-5:46 pm

2 stops18h 46m

Chicago O'Hare Intl

Mon 7/14

1:31 pm-2:00 pm

2 stops16h 29m

$630

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 5/23

5:20 am-7:40 pm

1 stop22h 20m

Chicago O'Hare Intl

Sat 9/13

9:40 pm-1:50 pm

1 stop32h 10m

$641

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 5/26

6:15 am-11:24 am

2 stops37h 09m

Chicago O'Hare Intl

Fri 9/12

10:40 am-6:40 pm

2 stops24h 00m

$681

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 5/26

6:00 am-12:30 pm

1 stop14h 30m

Chicago O'Hare Intl

Tue 9/9

3:35 pm-12:00 pm

1 stop12h 25m

$697

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 7/9

6:15 am-2:55 pm

1 stop16h 40m

Chicago O'Hare Intl

Mon 9/8

10:40 am-10:50 pm

2 stops28h 10m

$700

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 7/27

9:15 pm-9:40 am

1 stop20h 25m

Chicago O'Hare Intl

Sat 8/9

11:25 am-8:35 am

1 stop13h 10m

$718

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 5/26

3:30 pm-12:10 pm

1 stop28h 40m

Chicago O'Hare Intl

Tue 9/9

6:00 pm-10:05 am

2 stops32h 05m

$725

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 6/20

2:20 pm-8:41 am

2 stops26h 21m

Chicago O'Hare Intl

Sat 7/5

5:00 pm-8:20 pm

2 stops19h 20m

$776

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 4/28

8:00 pm-1:50 pm

1 stop25h 50m

Chicago O'Hare Intl

Wed 5/14

9:15 pm-1:30 pm

1 stop32h 15m

$799

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 26 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 $321). 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 17, 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 17, 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
1,329 reviews

Crew

8.4

Entertainment

7.1

Overall

7.8

Comfort

7.7

Food

7.3

Boarding

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
1,329 reviews
KLM
7.8
Good
1,329 reviews

Crew

8.4

Entertainment

7.1

Overall

7.8

Comfort

7.7

Food

7.3

Boarding

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
1,329 reviews

Crew

8.4

Entertainment

7.1

Overall

7.8

Comfort

7.7

Food

7.3

Boarding

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
775 reviews
KLM
7.8
Good
1,329 reviews

Crew

8.4

Entertainment

7.1

Overall

7.8

Comfort

7.7

Food

7.3

Boarding

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.
Air France
7.5
Good
1,435 reviews
KLM
7.8
Good
1,329 reviews

Crew

8.4

Entertainment

7.1

Overall

7.8

Comfort

7.7

Food

7.3

Boarding

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
1,580 reviews
KLM
7.8
Good
1,329 reviews

Crew

8.4

Entertainment

7.1

Overall

7.8

Comfort

7.7

Food

7.3

Boarding

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 ($417), Aer Lingus ($578), and British Airways ($629).

  • 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 $321). 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 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$460Average$785FlexibilityNo cancel feeOn-time75%
LOTCheapest$496Average$627FlexibilityNo cancel feeOn-time81%
British AirwaysCheapest$546Average$864FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$560Average$672FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$576Average$861FlexibilityNo cancel feeOn-time78%
LufthansaCheapest$601Average$768FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$601Average$781FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$603Average$718FlexibilityNo cancel feeOn-time69%

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