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Bulgaria

$343+ Cheap flights from Illinois to Bulgaria

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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SOF
Apr 8 — Apr 151
Tue 4/8
Tue 4/15
1 adult, Economy
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Cheap flight deals from Illinois to Bulgaria

Keep the following information in mind while searching for Illinois to Bulgaria flight deals. Data was last updated April 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$602
(KLM)

One-way from

$343
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$703
Provider with most accurate pricing for Chicago (CHI)-Sofia flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Sofia flights.
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From Illinois to Bulgaria
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One-way flight from Illinois to Bulgaria
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Highest demand for flights based on searches. 29% potential increase in price ($322 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($42 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 Illinois to Bulgaria

Cheapest flights from Illinois to Bulgaria
Explore the most affordable flight options available from Illinois to Bulgaria. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 3, 2025.

This KLM deal was found by Cheapflights users on 4/2. 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.
Tue 7/225:10 pmORD - SOF
1 stop12h 50mMultiple Airlines
Fri 10/247:00 amSOF - ORD
2 stops18h 39mMultiple Airlines
Deal found 4/2$602
This British Airways deal was found by Cheapflights users on 4/2. 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.
Sun 4/279:15 pmORD - SOF
1 stop13h 55mBritish Airways
Mon 5/198:00 pmSOF - ORD
1 stop27h 55mBritish Airways
Deal found 4/2$603
This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/214:20 pmORD - SOF
1 stop13h 40mKLM
Thu 5/87:00 amSOF - ORD
1 stop15h 10mKLM
Deal found 4/1$604
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.
Mon 4/211:25 pmORD - SOF
2 stops16h 35mAir France
Thu 5/87:00 amSOF - ORD
2 stops18h 29mAir France
Deal found 4/1$605
This oojo deal was found by Cheapflights users on 4/2. 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.
Tue 7/2211:25 amORD - SOF
1 stop19h 20mTurkish Airlines
Fri 10/249:15 pmSOF - ORD
1 stop28h 40mTurkish Airlines
Deal found 4/2$614
This United Airlines deal was found by Cheapflights users on 4/2. 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.
Fri 11/283:55 pmORD - SOF
1 stop13h 40mUnited Airlines
Tue 12/26:00 amSOF - ORD
2 stops22h 25mUnited Airlines
Deal found 4/2$623
This American Airlines deal was found by Cheapflights users on 4/2. 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.
Tue 4/295:45 pmORD - SOF
1 stop18h 55mAmerican Airlines
Sun 5/119:10 pmSOF - ORD
1 stop22h 35mAmerican Airlines
Deal found 4/2$633
This SWISS deal was found by Cheapflights users on 4/2. 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 4/286:35 pmORD - SOF
1 stop31h 30mSWISS
Thu 5/1510:50 amSOF - ORD
1 stop13h 05mSWISS
Deal found 4/2$636
This Air Canada 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/198:25 pmORD - SOF
2 stops31h 35mAir Canada
Fri 5/96:15 amSOF - ORD
2 stops37h 17mAir Canada
Deal found 4/1$637
This Expedia deal was found by Cheapflights users on 4/2. 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.
Tue 4/299:40 pmORD - VAR
1 stop15h 05mMultiple Airlines
Wed 5/144:00 pmVAR - ORD
1 stop29h 20mMultiple Airlines
Deal found 4/2$643
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 4/209:40 pmORD - SOF
1 stop17h 20mLufthansa
Wed 5/76:00 amSOF - ORD
1 stop14h 30mLufthansa
Deal found 4/1$643
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 4/204:20 pmORD - SOF
1 stop11h 20mAustrian Airlines
Mon 5/54:05 pmSOF - ORD
1 stop29h 15mAustrian Airlines
Deal found 4/1$648

Cheapflights Fare Finder

Customize your flight search to find flights from Illinois to Bulgaria 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 3, 2025.
Use the filters below to find and compare flights from Illinois to Bulgaria that are best for you.

Fly from

Illinois

Fly to

Bulgaria

Route

Depart

Return

Price

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 7/22

5:10 pm-2:00 pm

1 stop12h 50m

Sofia

Fri 10/24

7:00 am-5:39 pm

2 stops18h 39m

$602

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 4/27

9:15 pm-7:10 pm

1 stop13h 55m

Sofia

Mon 5/19

8:00 pm-3:55 pm

1 stop27h 55m

$603

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 4/21

4:20 pm-2:00 pm

1 stop13h 40m

Sofia

Thu 5/8

7:00 am-2:10 pm

1 stop15h 10m

$604

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 4/21

1:25 pm-2:00 pm

2 stops16h 35m

Sofia

Thu 5/8

7:00 am-5:29 pm

2 stops18h 29m

$605

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 7/22

11:25 am-2:45 pm

1 stop19h 20m

Sofia

Fri 10/24

9:15 pm-5:55 pm

1 stop28h 40m

$614

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 4/22

9:40 pm-11:00 pm

1 stop17h 20m

Sofia

Wed 4/30

6:15 am-11:32 am

2 stops37h 17m

$631

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 4/29

5:45 pm-8:40 pm

1 stop18h 55m

Sofia

Sun 5/11

9:10 pm-11:45 am

1 stop22h 35m

$633

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 4/28

6:35 pm-10:05 am

1 stop31h 30m

Sofia

Thu 5/15

10:50 am-3:55 pm

1 stop13h 05m

$636

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 4/19

8:25 pm-12:00 pm

2 stops31h 35m

Sofia

Thu 5/8

6:15 am-8:12 pm

2 stops21h 57m

$637

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 4/20

9:40 pm-11:00 pm

1 stop17h 20m

Sofia

Wed 5/7

6:00 am-12:30 pm

1 stop14h 30m

$643

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

Showing 1-10 of 40 results
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Best time to book a flight from Illinois to Bulgaria

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

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

Currently, November is the cheapest month in which you can book a flight from Illinois to Bulgaria (average of $632). Flying from Illinois to Bulgaria in June is currently the most expensive (average of $1,243). 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 IL to BG?

Find hourly flight availability from Illinois to Bulgaria. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 3, 2025.

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

Rainfall in Bulgaria by month

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

In terms of precipitation, rainfall in Bulgaria ranges from 1.2 - 2.8 inches per month. June is typically the wettest month, when rainfall can reach 2.8 in. January is typically the driest time to visit Bulgaria when rainfall is around 1.2 in.

Temperature in Bulgaria by month

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

If weather is an important factor for your trip to Bulgaria, 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 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Bulgaria

Get insights into the airlines that provide service to Bulgaria. 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 Bulgaria. Reviews last updated April 3, 2025.
Read reviews from past customers who have flown KLM, LOT and Austrian Airlines from Illinois to Bulgaria. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,323 reviews

Entertainment

7.2

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Comfort

7.7

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

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Comfort

7.7

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

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Comfort

7.7

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

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Comfort

7.7

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
1,574 reviews
KLM
7.8
Good
1,323 reviews

Entertainment

7.2

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Comfort

7.7

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
7.4
Good
1,427 reviews
KLM
7.8
Good
1,323 reviews

Entertainment

7.2

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Comfort

7.7

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 Illinois to Bulgaria. 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 Illinois to Bulgaria one-way?

    One-way options have recently been found by users for as low as $393 on Turkish Airlines. Other airlines that offer cheap prices include Air France from $492 and KLM from $508 one-way.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Illinois to Bulgaria (average of $632). Flying from Illinois to Bulgaria in June is currently the most expensive (average of $1,243). 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.

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Top 10 airlines flying from Illinois to Bulgaria

Discover the top 10 airlines that operate flights from Illinois to Bulgaria. 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 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$500Average$981FlexibilityNo cancel feeOn-time77%
LOTCheapest$577Average$875FlexibilityNo cancel feeOn-time81%
KLMCheapest$578Average$738FlexibilityNo cancel feeOn-time75%
Austrian AirlinesCheapest$593Average$1,002FlexibilityNo cancel feeOn-time78%
United AirlinesCheapest$616Average$869FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$616Average$1,070FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$627Average$927FlexibilityNo cancel feeOn-time70%
Air SerbiaCheapest$658Average$1,061FlexibilityNo cancel feeOn-timeN/A
ITA AirwaysCheapest$673Average$865FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$682Average$962FlexibilityNo cancel feeOn-time67%

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