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$451+ 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 6/20. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — ORD
Feb 13 — Feb 201
Fri 2/13
Fri 2/20
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 January 14, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$656
(KLM)

One-way from

$451
(Air Serbia)

Popular in

May

Cheapest in

February

Average price

$903
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 ($10 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 14, 2026.

This KLM deal was found by Cheapflights users on 1/13. 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 1/247:00 am
SOF
-
ORD
2 stops20h 21m
KLM
Fri 1/302:25 pm
ORD
-
SOF
2 stops15h 40m
KLM
Deal found 1/13$656
This British Airways deal was found by Cheapflights users on 1/13. 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 5/118:10 pm
SOF
-
ORD
1 stop26h 45m
British Airways
Sat 6/62:53 pm
ORD
-
SOF
2 stops21h 17m
British Airways
Deal found 1/13$657
This oojo deal was found by Cheapflights users on 1/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/132:35 pm
SOF
-
ORD
1 stop13h 25m
LOT
Thu 3/1910:55 pm
ORD
-
SOF
1 stop11h 55m
LOT
Deal found 1/12$670
This LOT deal was found by Cheapflights users on 1/12. 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 LOT is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/72:35 pm
SOF
-
ORD
1 stop13h 25m
LOT
Thu 2/129:55 pm
ORD
-
SOF
1 stop31h 55m
LOT
Deal found 1/12$673
This FlightHub deal was found by Cheapflights users on 1/12. 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.
Wed 4/292:40 pm
SOF
-
ORD
2 stops56h 30m
LOT
Sat 8/299:50 pm
ORD
-
SOF
1 stop32h 05m
LOT
Deal found 1/12$678
This British Airways deal was found by Cheapflights users on 1/13. 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.
Fri 5/152:20 pm
SOF
-
ORD
1 stop31h 30m
British Airways
Sat 6/62:53 pm
ORD
-
SOF
2 stops21h 17m
British Airways
Deal found 1/13$686
This British Airways deal was found by Cheapflights users on 1/13. 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.
Fri 5/152:20 pm
SOF
-
ORD
1 stop33h 35m
British Airways
Tue 6/94:53 pm
ORD
-
SOF
2 stops19h 37m
British Airways
Deal found 1/13$708
This Mytrip deal was found by Cheapflights users on 1/12. 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.
Sun 1/255:25 pm
SOF
-
ORD
3 stops37h 17m
Multiple Airlines
Sun 2/810:00 am
ORD
-
SOF
3 stops22h 10m
Multiple Airlines
Deal found 1/12$716
This KLM deal was found by Cheapflights users on 1/12. 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 3/137:00 am
SOF
-
ORD
1 stop15h 20m
Multiple Airlines
Thu 3/192:38 pm
ORD
-
SOF
2 stops16h 17m
Multiple Airlines
Deal found 1/12$717
This oojo deal was found by Cheapflights users on 1/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/92:40 pm
SOF
-
ORD
1 stop13h 10m
LOT
Sat 5/239:50 pm
ORD
-
SOF
1 stop12h 10m
LOT
Deal found 1/13$718
This Iberia deal was found by Cheapflights users on 1/12. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/189:00 pm
SOF
-
ORD
2 stops25h 55m
Multiple Airlines
Wed 4/157:00 pm
ORD
-
SOF
2 stops34h 25m
Multiple Airlines
Deal found 1/12$722
This Air France deal was found by Cheapflights users on 1/13. 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 1/277:10 am
SOF
-
ORD
1 stop16h 00m
Air France
Thu 4/305:10 pm
ORD
-
SOF
1 stop12h 50m
Air France
Deal found 1/13$723

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 January 14, 2026.
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

Sun 5/17

9:05 pm-1:50 pm

1 stop24h 45m

Chicago O'Hare Intl

Sat 6/6

2:53 pm-8:10 pm

2 stops21h 17m

$657

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 3/13

2:35 pm-9:00 pm

1 stop13h 25m

Chicago O'Hare Intl

Thu 3/19

10:55 pm-5:50 pm

1 stop11h 55m

$670

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 4/29

2:40 pm-3:10 pm

2 stops56h 30m

Chicago O'Hare Intl

Sat 8/29

9:50 pm-1:55 pm

1 stop32h 05m

$678

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 3/13

7:00 am-3:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Thu 3/19

2:38 pm-1:55 pm

2 stops16h 17m

$717

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 3/18

9:00 pm-3:55 pm

2 stops25h 55m

Chicago O'Hare Intl

Wed 4/15

7:00 pm-1:25 pm

2 stops34h 25m

$722

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 1/27

7:10 am-3:10 pm

1 stop16h 00m

Chicago O'Hare Intl

Thu 4/30

5:10 pm-2:00 pm

1 stop12h 50m

$723

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 1/27

7:00 am-5:45 pm

2 stops18h 45m

Chicago O'Hare Intl

Thu 4/30

5:10 pm-2:00 pm

1 stop12h 50m

$727

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Sat 1/24

7:00 am-4:16 pm

2 stops17h 16m

Chicago Midway

Fri 1/30

1:49 pm-1:55 pm

2 stops16h 06m

$732

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 1/24

5:00 am-5:20 pm

3 stops20h 20m

Chicago O'Hare Intl

Fri 2/6

6:30 pm-8:50 am

3 stops30h 20m

$736

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 2/26

2:35 pm-8:05 pm

1 stop13h 30m

Chicago O'Hare Intl

Thu 3/5

9:20 am-10:45 pm

2 stops29h 25m

$744

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/11

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, February is the cheapest month in which you can book a flight from Bulgaria to Illinois (average of $522). Flying from Bulgaria to Illinois in August is currently the most expensive (average of $670). 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.

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 January 14, 2026.
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
1,437 reviews

Entertainment

7.1

Boarding

7.7

Food

7.2

Comfort

7.6

Overall

7.7

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,437 reviews
KLM
7.7
Good
1,437 reviews

Entertainment

7.1

Boarding

7.7

Food

7.2

Comfort

7.6

Overall

7.7

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
LOT
7.5
Good
1,169 reviews
KLM
7.7
Good
1,437 reviews

Entertainment

7.1

Boarding

7.7

Food

7.2

Comfort

7.6

Overall

7.7

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
United Airlines
7.4
Good
9,152 reviews
KLM
7.7
Good
1,437 reviews

Entertainment

7.1

Boarding

7.7

Food

7.2

Comfort

7.6

Overall

7.7

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Turkish Airlines
7.3
Good
4,165 reviews
KLM
7.7
Good
1,437 reviews

Entertainment

7.1

Boarding

7.7

Food

7.2

Comfort

7.6

Overall

7.7

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Lufthansa
6.8
Okay
7,711 reviews
KLM
7.7
Good
1,437 reviews

Entertainment

7.1

Boarding

7.7

Food

7.2

Comfort

7.6

Overall

7.7

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 LOT, Air France, and KLM fly from Bulgaria to Illinois in about 13h 25m. The time it takes to get you to your destination can typically vary by up to 5h 15m. 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.

  • 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 ($374), Turkish Airlines ($488), and Austrian Airlines ($551).

  • 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 $522). Flying from Bulgaria to Illinois in August is currently the most expensive (average of $670). 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 6 airlines flying from Bulgaria to Illinois

Discover the top 6 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 January 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
LOTCheapest$532Average$676FlexibilityNo cancel feeOn-time81%
Turkish AirlinesCheapest$601Average$789FlexibilityNo cancel feeOn-time77%
KLMCheapest$607Average$742FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$642Average$773FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$643Average$766FlexibilityNo cancel feeOn-time69%
Austrian AirlinesCheapest$654Average$788FlexibilityNo cancel feeOn-time78%

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