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$483+ 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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — ORD
Jun 23 — Jun 301
Mon 6/23
Mon 6/30
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 June 18, 2025.

Round-trip from

$659
(Justfly.com)

One-way from

$483
(Kiwi.com)

Popular in

May

Cheapest in

November

Average price

$743
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. 6% potential increase in price ($49 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 18, 2025.

This Justfly.com deal was found by Cheapflights users on 6/17. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/115:20 amSOF - ORD
1 stop17h 50mLOT
Wed 4/89:40 pmORD - SOF
1 stop12h 15mLOT
Deal found 6/17$659
This Air France deal was found by Cheapflights users on 6/17. 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.
Thu 9/117:00 amSOF - ORD
1 stop15h 10mMultiple Airlines
Sat 12/61:35 pmORD - SOF
2 stops16h 20mMultiple Airlines
Deal found 6/17$676
This KLM deal was found by Cheapflights users on 6/17. 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 9/117:00 amSOF - ORD
1 stop15h 10mKLM
Sun 12/74:25 pmORD - SOF
1 stop13h 40mKLM
Deal found 6/17$677
This United Airlines deal was found by Cheapflights users on 6/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/166:15 amSOF - ORD
2 stops33h 44mUnited Airlines
Sun 7/276:00 pmORD - SOF
1 stop21h 00mUnited Airlines
Deal found 6/16$682
This Lufthansa deal was found by Cheapflights users on 6/17. 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.
Tue 9/912:00 pmSOF - ORD
1 stop15h 55mLufthansa
Sun 12/76:00 pmORD - SOF
1 stop20h 45mLufthansa
Deal found 6/17$694
This Air France deal was found by Cheapflights users on 6/15. 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.
Wed 11/57:00 amSOF - MDW
2 stops19h 07mMultiple Airlines
Thu 12/42:00 pmMDW - SOF
2 stops15h 55mMultiple Airlines
Deal found 6/15$703
This Air Canada deal was found by Cheapflights users on 6/17. 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.
Fri 9/126:00 amSOF - ORD
2 stops35h 51mAir Canada
Wed 4/87:00 amORD - SOF
2 stops22h 05mAir Canada
Deal found 6/17$710
This British Airways deal was found by Cheapflights users on 6/17. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/109:30 pmSOF - ORD
1 stop24h 25mBritish Airways
Sun 5/314:55 pmORD - SOF
1 stop18h 15mBritish Airways
Deal found 6/17$720
This Air Serbia deal was found by Cheapflights users on 6/17. 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 Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/85:00 amSOF - ORD
1 stop19h 40mAir Serbia
Sat 12/136:40 pmORD - SOF
1 stop24h 20mAir Serbia
Deal found 6/17$737
This SWISS deal was found by Cheapflights users on 6/17. 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.
Wed 9/1012:45 pmSOF - ORD
2 stops35h 10mSWISS
Fri 4/102:20 pmORD - SOF
1 stop11h 45mSWISS
Deal found 6/17$738
This Gurufare deal was found by Cheapflights users on 6/17. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/2010:20 amVAR - ORD
1 stop33h 50mMultiple Airlines
Sun 7/273:35 pmORD - VAR
1 stop11h 55mMultiple Airlines
Deal found 6/17$750
This Gotogate deal was found by Cheapflights users on 6/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/201:35 pmVAR - ORD
2 stops31h 20mLufthansa
Sun 7/273:35 pmORD - VAR
1 stop11h 55mLufthansa
Deal found 6/17$782

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 June 18, 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

Thu 9/11

5:20 am-3:10 pm

1 stop17h 50m

Chicago O'Hare Intl

Wed 4/8

9:40 pm-5:55 pm

1 stop12h 15m

$659

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 9/11

7:00 am-2:10 pm

1 stop15h 10m

Chicago O'Hare Intl

Sat 12/6

1:35 pm-1:55 pm

2 stops16h 20m

$676

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 9/11

7:00 am-2:10 pm

1 stop15h 10m

Chicago O'Hare Intl

Sun 12/7

4:25 pm-2:05 pm

1 stop13h 40m

$677

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 7/16

6:15 am-7:59 am

2 stops33h 44m

Chicago O'Hare Intl

Sun 7/27

6:00 pm-11:00 pm

1 stop21h 00m

$682

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 9/9

2:00 pm-7:55 pm

1 stop13h 55m

Chicago O'Hare Intl

Thu 12/11

6:00 pm-1:10 pm

1 stop11h 10m

$694

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Wed 11/5

7:00 am-6:07 pm

2 stops19h 07m

Chicago Midway

Thu 12/4

2:00 pm-1:55 pm

2 stops15h 55m

$703

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 9/12

6:00 am-9:51 am

2 stops35h 51m

Chicago O'Hare Intl

Wed 4/8

7:00 am-1:05 pm

2 stops22h 05m

$710

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 9/10

9:30 pm-1:55 pm

1 stop24h 25m

Chicago O'Hare Intl

Sat 5/30

9:15 pm-8:20 pm

1 stop15h 05m

$720

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 9/8

5:00 am-4:40 pm

1 stop19h 40m

Chicago O'Hare Intl

Sat 12/13

6:40 pm-3:00 am

1 stop24h 20m

$737

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 9/10

12:45 pm-3:55 pm

2 stops35h 10m

Chicago O'Hare Intl

Fri 4/10

2:20 pm-10:05 am

1 stop11h 45m

$738

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/16

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 $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 June 18, 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 June 18, 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
1,364 reviews

Food

7.2

Crew

8.4

Comfort

7.7

Boarding

7.8

Overall

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
1,364 reviews
KLM
7.8
Good
1,364 reviews

Food

7.2

Crew

8.4

Comfort

7.7

Boarding

7.8

Overall

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.
LOT
7.6
Good
1,081 reviews
KLM
7.8
Good
1,364 reviews

Food

7.2

Crew

8.4

Comfort

7.7

Boarding

7.8

Overall

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
804 reviews
KLM
7.8
Good
1,364 reviews

Food

7.2

Crew

8.4

Comfort

7.7

Boarding

7.8

Overall

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
1,467 reviews
KLM
7.8
Good
1,364 reviews

Food

7.2

Crew

8.4

Comfort

7.7

Boarding

7.8

Overall

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
1,632 reviews
KLM
7.8
Good
1,364 reviews

Food

7.2

Crew

8.4

Comfort

7.7

Boarding

7.8

Overall

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 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 Austrian Airlines ($616), British Airways ($666), and LOT ($669).

  • 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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Alternative routes for Bulgaria to Illinois

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 June 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$485Average$763FlexibilityNo cancel feeOn-time75%
LOTCheapest$532Average$628FlexibilityNo cancel feeOn-time81%
British AirwaysCheapest$546Average$864FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$560Average$672FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$576Average$881FlexibilityNo cancel feeOn-time78%
Turkish AirlinesCheapest$601Average$779FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$603Average$700FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$615Average$783FlexibilityNo cancel feeOn-time76%

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