How long is the flight from Illinois to Bulgaria?

There are many flights that can get you from Illinois to Bulgaria in 11h 15m. Fly via Turkish Airlines, United Airlines, or Lufthansa to get the fastest option. Illinois and Bulgaria 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.

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.

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).

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.

$328+ Cheap Flights from Illinois to Bulgaria

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Illinois to Bulgaria with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Illinois to Bulgaria

Round-trip from	$503 (Justfly.com)
One-way from	$328 (Kiwi.com)
Popular in	June
Cheapest in	February
Average price	$595

From Illinois to Bulgaria

Search Deals

One-way flight from Illinois to Bulgaria

Search Deals

Highest demand for flights based on searches. 27% potential increase in price ($270 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($38 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

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 September 16, 2025.

Mon 10/2011:45 pmORD - VAR

1 stop25h 00mTurkish Airlines

Tue 11/410:25 amVAR - ORD

1 stop31h 40mTurkish Airlines

Deal found 9/15

$503

Sun 10/127:05 pmORD - SOF

1 stop11h 40mMultiple Airlines

Thu 11/66:00 amSOF - ORD

2 stops16h 55mMultiple Airlines

Deal found 9/14

$549

Sun 11/29:50 pmORD - SOF

1 stop12h 30mUnited Airlines

Wed 11/196:10 amSOF - ORD

2 stops16h 45mUnited Airlines

Deal found 9/14

$551

Tue 11/44:00 pmORD - SOF

2 stops18h 20mUnited Airlines

Fri 11/212:35 pmSOF - ORD

1 stop13h 30mUnited Airlines

Deal found 9/14

$555

Mon 10/1311:45 pmORD - VAR

1 stop25h 00mTurkish Airlines

Tue 10/2810:25 amVAR - ORD

1 stop31h 40mTurkish Airlines

Deal found 9/14

$556

Fri 11/79:55 pmORD - SOF

1 stop31h 55mLOT

Sat 11/222:35 pmSOF - ORD

1 stop13h 25mLOT

Deal found 9/14

$557

Sun 11/1612:50 pmORD - SOF

2 stops16h 20mAir Canada

Fri 3/66:10 amSOF - ORD

2 stops21h 20mAir Canada

Deal found 9/14

$558

Sun 12/2810:35 pmORD - SOF

1 stop16h 10mMultiple Airlines

Mon 3/23:00 pmSOF - ORD

1 stop33h 20mMultiple Airlines

Deal found 9/14

$559

Wed 10/292:22 pmORD - SOF

2 stops16h 28mUnited Airlines

Fri 11/72:35 pmSOF - ORD

1 stop13h 30mUnited Airlines

Deal found 9/15

$560

Sun 10/59:40 pmORD - SOF

1 stop12h 15mLOT

Mon 11/36:35 pmSOF - ORD

1 stop33h 25mLOT

Deal found 9/14

$561

Sat 11/158:15 pmORD - SOF

2 stops33h 20mMultiple Airlines

Thu 1/156:00 amSOF - ORD

1 stop15h 10mMultiple Airlines

Deal found 9/14

$562

Mon 10/206:30 amORD - SOF

2 stops20h 45mMultiple Airlines

Tue 11/46:00 amSOF - ORD

2 stops24h 05mMultiple Airlines

Deal found 9/16

$563

Best flights from Illinois to Bulgaria
Discover carefully curated flight deals from Illinois to Bulgaria that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 16, 2025.

Mon 10/2011:45 pmORD - VAR

1 stop25h 00mTurkish Airlines

Tue 11/410:25 amVAR - ORD

1 stop31h 40mTurkish Airlines

Deal found 9/15

$503

Mon 11/36:00 pmORD - SOF

1 stop11h 15mUnited Airlines

Wed 11/196:10 amSOF - ORD

2 stops16h 45mUnited Airlines

Deal found 9/14

$551

Tue 1/139:50 pmORD - SOF

1 stop12h 30mMultiple Airlines

Tue 1/276:00 amSOF - ORD

2 stops22h 00mMultiple Airlines

Deal found 9/15

$552

Sun 10/193:30 pmSTL - SOF

1 stop13h 30mLufthansa

Tue 11/42:15 pmSOF - STL

1 stop31h 40mLufthansa

Deal found 9/15

$570

Sun 10/199:15 amSTL - SOF

2 stops18h 45mAir Canada

Tue 11/42:15 pmSOF - STL

2 stops57h 14mAir Canada

Deal found 9/15

$577

Mon 12/151:50 pmMDW - SOF

2 stops16h 15mKLM

Thu 1/87:00 amSOF - MDW

2 stops19h 08mKLM

Deal found 9/14

$875

Tue 11/46:00 pmORD - SOF

1 stop20h 45mUnited Airlines

Thu 11/206:00 amSOF - ORD

2 stops22h 00mUnited Airlines

Deal found 9/14

$551

Mon 10/1311:45 pmORD - VAR

1 stop25h 00mTurkish Airlines

Tue 10/2810:25 amVAR - ORD

1 stop31h 40mTurkish Airlines

Deal found 9/14

$556

Sun 10/193:30 pmSTL - SOF

1 stop18h 20mMultiple Airlines

Tue 11/46:05 amSOF - STL

2 stops23h 49mMultiple Airlines

Deal found 9/15

$574

Wed 12/34:20 pmORD - VAR

1 stop17h 00mLufthansa

Sun 12/74:00 pmVAR - ORD

2 stops53h 10mLufthansa

Deal found 9/13

$604

Mon 10/203:35 pmORD - SOF

1 stop12h 25mUnited Airlines

Tue 11/46:00 amSOF - ORD

1 stop15h 10mUnited Airlines

Deal found 9/16

$551

Mon 10/206:30 amORD - VAR

2 stops24h 45mMultiple Airlines

Tue 11/44:00 pmVAR - ORD

2 stops39h 43mMultiple Airlines

Deal found 9/15

$583

Sun 11/29:50 pmORD - SOF

1 stop12h 30mUnited Airlines

Fri 11/212:35 pmSOF - ORD

1 stop13h 30mUnited Airlines

Deal found 9/14

$551

Tue 11/46:00 pmORD - SOF

1 stop11h 15mUnited Airlines

Tue 11/186:00 amSOF - ORD

2 stops22h 00mUnited Airlines

Deal found 9/14

$551

Mon 10/134:20 pmORD - VAR

1 stop14h 55mMultiple Airlines

Tue 10/288:50 pmVAR - ORD

2 stops32h 07mMultiple Airlines

Deal found 9/14

$631

Mon 11/39:50 pmORD - SOF

1 stop16h 55mUnited Airlines

Thu 11/206:00 amSOF - ORD

2 stops22h 00mUnited Airlines

Deal found 9/14

$551

Sat 11/151:47 pmMDW - SOF

2 stops16h 08mMultiple Airlines

Thu 1/157:00 amSOF - MDW

2 stops19h 08mMultiple Airlines

Deal found 9/14

$634

Thu 10/166:23 pmMDW - SOF

2 stops35h 37mKLM

Mon 10/207:00 amSOF - MDW

2 stops19h 25mKLM

Deal found 9/13

$882

Tue 1/139:50 pmORD - SOF

1 stop12h 30mUnited Airlines

Tue 1/276:00 amSOF - ORD

2 stops20h 51mUnited Airlines

Deal found 9/15

$552

Tue 11/44:00 pmORD - SOF

2 stops18h 20mUnited Airlines

Wed 11/196:10 amSOF - ORD

2 stops21h 50mUnited Airlines

Deal found 9/14

$555

Mon 11/2412:50 pmORD - SOF

2 stops16h 35mUnited Airlines

Wed 3/116:10 amSOF - ORD

2 stops19h 17mUnited Airlines

Deal found 9/15

$555

Sat 9/271:08 pmMDW - SOF

2 stops16h 52mMultiple Airlines

Tue 10/77:00 amSOF - MDW

2 stops17h 09mMultiple Airlines

Deal found 9/15

$749

Mon 12/151:50 pmMDW - SOF

2 stops16h 15mKLM

Wed 1/77:00 amSOF - MDW

2 stops19h 08mKLM

Deal found 9/14

$1,000

Sun 1/115:50 pmORD - SOF

2 stops16h 30mUnited Airlines

Wed 4/16:15 amSOF - ORD

1 stop12h 40mUnited Airlines

Deal found 9/16

$556

Tue 12/161:50 pmMDW - SOF

2 stops16h 05mMultiple Airlines

Thu 1/87:00 amSOF - MDW

2 stops19h 08mMultiple Airlines

Deal found 9/14

$914

Tue 12/161:50 pmMDW - SOF

2 stops16h 05mMultiple Airlines

Wed 1/77:00 amSOF - MDW

2 stops19h 08mMultiple Airlines

Deal found 9/14

$1,039

Fri 10/313:00 pmMDW - SOF

2 stops15h 55mMultiple Airlines

Fri 11/77:00 amSOF - MDW

2 stops18h 43mMultiple Airlines

Deal found 9/16

$1,091

Fri 3/62:00 pmMDW - SOF

2 stops15h 55mMultiple Airlines

Mon 3/97:00 amSOF - MDW

2 stops18h 08mMultiple Airlines

Deal found 9/16

$1,091

Last-minute flights from Illinois to Bulgaria
Discover last-minute flight deals from Illinois to Bulgaria. Data last updated September 16, 2025 and is based on user searches.

Sun 10/59:40 pmORD - SOF

1 stop12h 15mLOT

Mon 11/36:35 pmSOF - ORD

1 stop33h 25mLOT

Deal found 9/14

$561

Tue 10/710:40 amORD - SOF

2 stops23h 10mMultiple Airlines

Mon 12/83:00 pmSOF - ORD

1 stop33h 20mMultiple Airlines

Deal found 9/15

$562

Sun 10/127:05 pmORD - SOF

1 stop11h 40mMultiple Airlines

Thu 11/66:00 amSOF - ORD

2 stops16h 55mMultiple Airlines

Deal found 9/14

$549

Mon 10/1311:45 pmORD - VAR

1 stop25h 00mTurkish Airlines

Tue 10/2810:25 amVAR - ORD

1 stop31h 40mTurkish Airlines

Deal found 9/14

$556

Mon 10/136:00 pmORD - SOF

1 stop21h 00mUnited Airlines

Wed 11/56:10 amSOF - ORD

2 stops35h 55mUnited Airlines

Deal found 9/15

$557

Mon 10/134:20 pmORD - SOF

1 stop11h 20mMultiple Airlines

Wed 11/56:05 amSOF - ORD

2 stops15h 05mMultiple Airlines

Deal found 9/14

$568

Mon 10/2011:45 pmORD - VAR

1 stop25h 00mTurkish Airlines

Tue 11/410:25 amVAR - ORD

1 stop31h 40mTurkish Airlines

Deal found 9/15

$503

Mon 10/203:35 pmORD - SOF

1 stop12h 25mUnited Airlines

Tue 11/46:00 amSOF - ORD

1 stop15h 10mUnited Airlines

Deal found 9/16

$551

Mon 10/206:30 amORD - SOF

2 stops20h 45mMultiple Airlines

Tue 11/46:00 amSOF - ORD

2 stops24h 05mMultiple Airlines

Deal found 9/16

$563

Mon 10/208:40 amORD - VAR

2 stops22h 35mMultiple Airlines

Tue 11/44:00 pmVAR - ORD

1 stop30h 00mMultiple Airlines

Deal found 9/15

$568

Wed 10/292:22 pmORD - SOF

2 stops16h 28mUnited Airlines

Fri 11/72:35 pmSOF - ORD

1 stop13h 30mUnited Airlines

Deal found 9/15

$560

Fri 10/317:50 pmORD - SOF

1 stop31h 25mMultiple Airlines

Fri 11/76:10 amSOF - ORD

2 stops16h 45mMultiple Airlines

Deal found 9/16

$567

One-way flights from Illinois to Bulgaria
Search for one-way flight options from Illinois to Bulgaria. Find affordable one-way fares based on user searches. Data last updated September 16, 2025.

Mon 9/225:10 amORD - SOF

3 stops44h 00mMultiple Airlines

Deal found 9/14

$328

Wed 11/267:10 pmORD - SOF

3 stops37h 00mMultiple Airlines

Deal found 9/16

$346

Sat 12/276:40 pmORD - SOF

1 stop24h 20mAir Serbia

Deal found 9/14

$360

Mon 10/1310:30 pmORD - SOF

1 stop16h 20mLufthansa

Deal found 9/14

$425

Tue 10/147:25 pmORD - SOF

2 stops16h 00mMultiple Airlines

Deal found 9/14

$436

Mon 10/1310:40 amORD - SOF

2 stops21h 40mMultiple Airlines

Deal found 9/14

$437

Mon 9/228:19 amMDW - SOF

3 stops30h 46mMultiple Airlines

Deal found 9/14

$468

Mon 9/221:08 pmMDW - SOF

2 stops16h 52mAir France

Deal found 9/14

$552

Fly from

Fly to

Route

Depart

Return

Price

ChicagoVarna

ORD - VAR

ORDVAR

Chicago O'Hare Intl

Mon 10/20

11:45 pm-8:45 am

1 stop25h 00m

Varna

Tue 11/4

10:25 am-10:05 am

1 stop31h 40m

$503

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 11/3

6:00 pm-1:15 pm

1 stop11h 15m

Sofia

Wed 11/19

6:10 am-2:55 pm

2 stops16h 45m

$551

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 11/4

6:00 pm-10:45 pm

1 stop20h 45m

Sofia

Thu 11/20

6:00 am-8:00 pm

2 stops22h 00m

$551

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 10/20

3:35 pm-12:00 pm

1 stop12h 25m

Sofia

Tue 11/4

6:00 am-1:10 pm

1 stop15h 10m

$551

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 11/2

9:50 pm-6:20 pm

1 stop12h 30m

Sofia

Fri 11/21

2:35 pm-8:05 pm

1 stop13h 30m

$551

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 11/4

6:00 pm-1:15 pm

1 stop11h 15m

Sofia

Tue 11/18

6:00 am-8:00 pm

2 stops22h 00m

$551

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 11/3

9:50 pm-10:45 pm

1 stop16h 55m

Sofia

Thu 11/20

6:00 am-8:00 pm

2 stops22h 00m

$551

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 1/13

9:50 pm-6:20 pm

1 stop12h 30m

Sofia

Tue 1/27

6:00 am-8:00 pm

2 stops22h 00m

$552

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 1/13

9:50 pm-6:20 pm

1 stop12h 30m

Sofia

Tue 1/27

6:00 am-6:51 pm

2 stops20h 51m

$552

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 11/4

4:00 pm-6:20 pm

2 stops18h 20m

Sofia

Wed 11/19

6:10 am-8:00 pm

2 stops21h 50m

$555

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 37 results

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 $1,183). 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?

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.

Related info for your journey

How long is the flight from Illinois to Bulgaria?
There are many flights that can get you from Illinois to Bulgaria in 11h 15m. Fly via Turkish Airlines, United Airlines, or Lufthansa to get the fastest option. Illinois and Bulgaria 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.
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 $1,183). 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Illinois to Bulgaria

John F Kennedy Intl to Heathrow flights

John F Kennedy Intl to Charles de Gaulle flights

Newark to Heathrow flights

Newark to Charles de Gaulle flights

John F Kennedy Intl to Leonardo da Vinci/Fiumicino flights

John F Kennedy Intl to Istanbul flights

Newark to Orly flights

Newark to Leonardo da Vinci/Fiumicino flights

Boston to Heathrow flights

LaGuardia to Heathrow flights

Dulles Intl to Heathrow flights

John F Kennedy Intl to Lisbon flights

John F Kennedy Intl to London City flights

Los Angeles to Heathrow flights

John F Kennedy Intl to Orly flights

Newark to Gatwick flights

John F Kennedy Intl to Gatwick flights

Newark to Madrid flights

LaGuardia to Charles de Gaulle flights

O'Hare Intl to Heathrow flights

Newark to Lisbon flights

Miami to Madrid flights

Dulles Intl to Charles de Gaulle flights

John F Kennedy Intl to Madrid flights

Newark to Barcelona-El Prat flights

Dallas/Fort Worth to Heathrow flights

Boston to Charles de Gaulle flights

San Francisco to Heathrow flights

John F Kennedy Intl to Barcelona-El Prat flights

Baltimore to Heathrow flights

O'Hare Intl to Charles de Gaulle flights

John F Kennedy Intl to Frederic Chopin flights

Newark to Malpensa flights

Los Angeles to Charles de Gaulle flights

John F Kennedy Intl to Athens flights

LaGuardia to Gatwick flights

Newark to London City flights

Dallas/Fort Worth to Charles de Gaulle flights

John F Kennedy Intl to Malpensa flights

Newark to Dublin flights

Seattle to Heathrow flights

John F Kennedy Intl to Frankfurt flights

LaGuardia to Leonardo da Vinci/Fiumicino flights

John F Kennedy Intl to Dublin flights

Newark to Athens flights

O'Hare Intl to Leonardo da Vinci/Fiumicino flights

John F Kennedy Intl to Amsterdam flights

Dulles Intl to Leonardo da Vinci/Fiumicino flights

John F Kennedy Intl to Zurich flights

San Francisco to Charles de Gaulle flights

Top 10 airlines flying from Illinois to Bulgaria

Airline	Cheapest	Average	Flexibility	On-time
Turkish Airlines	Cheapest$497	Average$887	FlexibilityNo cancel fee	On-time77%
Air France	Cheapest$498	Average$624	FlexibilityNo cancel fee	On-time77%
KLM	Cheapest$533	Average$739	FlexibilityNo cancel fee	On-time75%
LOT	Cheapest$569	Average$905	FlexibilityNo cancel fee	On-time81%
Lufthansa	Cheapest$589	Average$1,024	FlexibilityNo cancel fee	On-time76%
SWISS	Cheapest$596	Average$813	FlexibilityNo cancel fee	On-time79%
United Airlines	Cheapest$601	Average$791	FlexibilityNo cancel fee	On-time69%
British Airways	Cheapest$613	Average$808	FlexibilityNo cancel fee	On-time70%
Austrian Airlines	Cheapest$613	Average$997	FlexibilityNo cancel fee	On-time78%
Air Serbia	Cheapest$652	Average$1,021	FlexibilityNo cancel fee	On-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$328+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Illinois to Bulgaria with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 September 16, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Illinois to Bulgaria

Cheapest flights from Illinois to BulgariaExplore 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 September 16, 2025.

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 September 16, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to Bulgaria that are best for you.

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.

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?

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 September 16, 2025.

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.

How long is the flight from Illinois to Bulgaria?

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

How can I find direct flights from Illinois to Bulgaria?

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Bulgaria

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from Illinois to Bulgaria

100% Free

Book with Flexibility

Travel Smart

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 September 16, 2025.