What is the cheapest airline that flies from Bulgaria to Illinois?

Air Serbia, Qatar Airways, and Lufthansa are the most popular carriers operating from Bulgaria to Illinois

How long is the flight from Bulgaria to Illinois?

The flight from Bulgaria to Illinois depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Sofia (a popular airport in Bulgaria) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 13h 40m on average. If you fly from Varna (another popular airport in Bulgaria) to Chicago O'Hare Intl Airport, then the average flight time is 29h 50m.

What airlines fly to Illinois?

Lufthansa, LOT and Turkish Airlines are the top three most popular airlines that fly to Illinois from Bulgaria according to our data. Lufthansa is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 7 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Bulgaria to Illinois?

Prices for flights from Bulgaria to Illinois were last updated today.

How many operators does momondo search for flights from Bulgaria to Illinois?

As of August 2025, there are 7 operators available to choose from for flights from Bulgaria to Illinois.

How old do you have to be to fly from Bulgaria to Illinois?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Bulgaria to Illinois.

What documentation or ID do you need to fly to Illinois?

The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$375 Cheap Flights from Bulgaria to Illinois in 2025

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Find the cheapest flights from Bulgaria to Illinois

Round-trip

One-way

Recent round-trip flight deals from Bulgaria to Illinois

1:55 pm - 7:55 pmSOF-ORD

14h 00m1 stop

4:20 pm - 6:00 pmORD-SOF

17h 40m1 stop

$645United Airlines

Find Deal

Thu, Sep 4 - Thu, Nov 13

2:00 pm - 9:51 amSOF-ORD

27h 51m2 stops

12:50 pm - 6:15 pmORD-SOF

21h 25m2 stops

$646Air Canada

Find Deal

Tue, Sep 9 - Tue, Dec 9

6:20 am - 4:53 pmSOF-ORD

18h 33m2 stops

6:00 pm - 10:45 pmORD-SOF

20h 45m1 stop

$647United Airlines

Find Deal

Sun, Sep 7 - Mon, Nov 10

6:40 pm - 12:05 pmSOF-ORD

25h 25m1 stop

9:55 pm - 5:50 pmORD-SOF

11h 55m1 stop

$661LOT

Find Deal

Sat, Sep 6 - Wed, Nov 12

6:40 pm - 12:05 pmSOF-ORD

25h 25m1 stop

9:55 pm - 5:50 pmORD-SOF

11h 55m1 stop

$662LOT

Find Deal

Sat, Sep 6 - Sat, Nov 8

7:00 am - 2:40 pmSOF-ORD

15h 40m1 stop

4:40 pm - 2:00 pmORD-SOF

13h 20m1 stop

$663KLM

Find Deal

Mon, Sep 22 - Wed, Oct 8

6:15 am - 11:00 amSOF-ORD

12h 45m1 stop

9:50 pm - 6:20 pmORD-SOF

12h 30m1 stop

$671Lufthansa

Find Deal

Sat, Sep 6 - Sun, Nov 9

3:35 pm - 10:00 pmSOF-ORD

14h 25m1 stop

11:50 am - 8:50 pmORD-SOF

25h 00m1 stop

$676Turkish Airlines

Find Deal

Mon, Sep 8 - Thu, Nov 13

7:00 am - 5:45 pmSOF-ORD

18h 45m2 stops

1:35 pm - 2:05 pmORD-SOF

16h 30m2 stops

$677KLM

Find Deal

Fri, Sep 19 - Tue, Dec 9

3:35 pm - 9:40 amSOF-ORD

26h 05m1 stop

11:50 am - 3:10 pmORD-SOF

19h 20m1 stop

$680Turkish Airlines

Find Deal

Tue, Sep 9 - Sat, Nov 8

United Airlines flights from Bulgaria to Illinois

Our best United Airlines deals on Bulgaria to Illinois flight tickets

United Airlines

Sep 4

SOF1:55 pmSofia

14h 00m

1 stop

ORD7:55 pmChicago O'Hare Intl

Nov 13

ORD4:20 pmChicago O'Hare Intl

17h 40m

1 stop

SOF6:00 pmSofia

$645

Find similar

United Airlines

Sep 7

SOF6:20 amSofia

18h 33m

2 stops

ORD4:53 pmChicago O'Hare Intl

Nov 10

ORD6:00 pmChicago O'Hare Intl

20h 45m

1 stop

SOF10:45 pmSofia

$647

Find similar

United Airlines

Sep 21

SOF6:20 amSofia

18h 50m

2 stops

ORD5:10 pmChicago O'Hare Intl

Dec 8

ORD9:50 pmChicago O'Hare Intl

16h 55m

1 stop

SOF10:45 pmSofia

$648

Find similar

Air Canada flights from Bulgaria to Illinois

Our best Air Canada deals on Bulgaria to Illinois flight tickets

Air Canada

Sep 9

SOF2:00 pmSofia

27h 51m

2 stops

ORD9:51 amChicago O'Hare Intl

Dec 9

ORD12:50 pmChicago O'Hare Intl

21h 25m

2 stops

SOF6:15 pmSofia

$646

Find similar

Air Canada

Sep 10

SOF6:15 amSofia

16h 40m

2 stops

ORD2:55 pmChicago O'Hare Intl

Dec 10

ORD2:00 pmChicago O'Hare Intl

20h 00m

2 stops

SOF6:00 pmSofia

$653

Find similar

Air Canada

Sep 3

SOF6:00 amSofia

37h 23m

2 stops

ORD11:23 amChicago O'Hare Intl

Nov 17

ORD12:50 pmChicago O'Hare Intl

16h 25m

2 stops

SOF1:15 pmSofia

$655

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 9/4

1:55 pm-7:55 pm

1 stop14h 00m

Chicago O'Hare Intl

Thu 11/13

4:20 pm-6:00 pm

1 stop17h 40m

$645

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 9/9

2:00 pm-9:51 am

2 stops27h 51m

Chicago O'Hare Intl

Tue 12/9

12:50 pm-6:15 pm

2 stops21h 25m

$646

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 9/7

6:20 am-4:53 pm

2 stops18h 33m

Chicago O'Hare Intl

Mon 11/10

6:00 pm-10:45 pm

1 stop20h 45m

$647

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 9/6

6:40 pm-12:05 pm

1 stop25h 25m

Chicago O'Hare Intl

Wed 11/12

9:55 pm-5:50 pm

1 stop11h 55m

$661

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 9/6

6:40 pm-12:05 pm

1 stop25h 25m

Chicago O'Hare Intl

Sat 11/8

9:55 pm-5:50 pm

1 stop11h 55m

$662

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 9/22

7:00 am-2:40 pm

1 stop15h 40m

Chicago O'Hare Intl

Wed 10/8

4:40 pm-2:00 pm

1 stop13h 20m

$663

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 9/6

6:15 am-11:00 am

1 stop12h 45m

Chicago O'Hare Intl

Sun 11/9

9:50 pm-6:20 pm

1 stop12h 30m

$671

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 9/8

3:35 pm-10:00 pm

1 stop14h 25m

Chicago O'Hare Intl

Thu 11/13

11:50 am-8:50 pm

1 stop25h 00m

$676

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 9/19

7:00 am-5:45 pm

2 stops18h 45m

Chicago O'Hare Intl

Tue 12/9

1:35 pm-2:05 pm

2 stops16h 30m

$677

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 9/9

3:35 pm-9:40 am

1 stop26h 05m

Chicago O'Hare Intl

Sat 11/8

11:50 am-3:10 pm

1 stop19h 20m

$680

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Bulgaria to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Bulgaria is in November. Flight prices, which tend to average around $645, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of November, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $654.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Bulgaria to Illinois is on a Thursday when prices can be found for as low as $666. Flights from Bulgaria to Illinois on a Wednesday will generally be more expensive and average around $785. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Bulgaria to Illinois during this time can be as low as $666. Flights in the evening are often more expensive with an average ticket price of $768.

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Bulgaria when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $706 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Bulgaria for as low as $625 on momondo.

Cheap Bulgaria to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Bulgaria to Illinois

Direct flights	None

There are no direct flights from Bulgaria to Illinois. There are no popular flight routes from Bulgaria to Illinois.

Search flight deals

When did momondo last update prices for flights from Bulgaria to Illinois?
Prices for flights from Bulgaria to Illinois were last updated today.
How many operators does momondo search for flights from Bulgaria to Illinois?
As of August 2025, there are 7 operators available to choose from for flights from Bulgaria to Illinois.
How old do you have to be to fly from Bulgaria to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Bulgaria to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Bulgaria to Illinois

Compare and see reviews for airlines that fly from Bulgaria to Illinois with momondo

Airline	Rating	Free Cancellation	Price
KLM	PriceFrom $460	Free Cancellation	Rating 7.8 1,388 reviews	Search KLM flights
LOT	PriceFrom $533	Free Cancellation	Rating 7.6 1,110 reviews	Search LOT flights
Air France	PriceFrom $560	Free Cancellation	Rating 7.4 1,469 reviews	Search Air France flights
Austrian Airlines	PriceFrom $576	Free Cancellation	Rating 7.6 830 reviews	Search Austrian Airlines flights
Turkish Airlines	PriceFrom $601	Free Cancellation	Rating 7.3 3,949 reviews	Search Turkish Airlines flights
United Airlines	PriceFrom $603	Free Cancellation	Rating 7.4 8,928 reviews	Search United Airlines flights
Lufthansa	PriceFrom $615	Free Cancellation	Rating 6.8 7,337 reviews	Search Lufthansa flights

Why use momondo?

Why should I use momondo to find a flight deal from Bulgaria to Illinois?

Finding the right flight to Illinois from Bulgaria is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

Can I find flights from Bulgaria to Illinois with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Illinois from Bulgaria with this policy.

How can momondo help me find flights from Bulgaria to Illinois?

Once you have performed a search for Bulgaria to Illinois flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Bulgaria to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Bulgaria to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.