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

Air Serbia and British Airways are the most popular carriers operating from Bulgaria to Illinois

What airlines fly to Illinois?

LOT, Lufthansa and United Airlines are the top three most popular airlines that fly to Illinois from Bulgaria according to our data. LOT is the first choice among our users, with 34% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 8 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

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 14h 35m on average. If you fly from Varna (another popular airport in Bulgaria) to Chicago O'Hare Intl Airport, then the average flight time is 30h.

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 November 2025, there are 8 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.

$321 Cheap Flights from Bulgaria to Illinois in 2025/26

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Find the cheapest flights from Bulgaria to Illinois

Round-trip

One-way

Last minute

Recent round-trip flight deals from Bulgaria to Illinois

Enter your travel dates to find the best prices.

6:35 pm - 8:00 pmSOF-ORD

33h 25m1 stop

9:40 pm - 2:00 amORD-SOF

20h 20m1 stop

$661LOT

Find Deal

Fri, Dec 12 - Thu, Jun 4

6:35 pm - 8:00 pmSOF-ORD

33h 25m1 stop

10:55 pm - 1:50 pmORD-SOF

31h 55m1 stop

$664LOT

Find Deal

Tue, Mar 3 - Sat, Mar 14

9:40 pm - 10:05 amSOF-ORD

20h 25m1 stop

11:50 am - 8:45 amORD-SOF

12h 55m1 stop

$680Turkish Airlines

Find Deal

Sun, Dec 14 - Tue, Dec 30

9:40 pm - 10:05 amSOF-ORD

20h 25m1 stop

11:50 am - 8:45 amORD-SOF

12h 55m1 stop

$682Turkish Airlines

Find Deal

Thu, Nov 20 - Wed, Dec 3

7:00 am - 2:20 pmSOF-ORD

15h 20m1 stop

5:25 pm - 2:05 pmORD-SOF

13h 40m1 stop

$692KLM

Find Deal

Fri, Mar 6 - Fri, Mar 13

7:00 am - 5:56 pmSOF-ORD

18h 56m2 stops

5:25 pm - 2:05 pmORD-SOF

13h 40m1 stop

$698KLM

Find Deal

Thu, Mar 5 - Fri, Mar 13

6:05 am - 3:20 pmSOF-ORD

17h 15m2 stops

6:00 pm - 1:15 pmORD-SOF

11h 15m1 stop

$699Lufthansa

Find Deal

Sun, Dec 14 - Tue, Dec 30

6:05 am - 3:20 pmSOF-ORD

17h 15m2 stops

6:00 pm - 1:15 pmORD-SOF

11h 15m1 stop

$701Lufthansa

Find Deal

Sun, Dec 14 - Tue, Dec 30

2:20 pm - 8:05 pmSOF-ORD

13h 45m1 stop

2:18 pm - 1:15 pmORD-SOF

14h 57m2 stops

$710United Airlines

Find Deal

Mon, Dec 15 - Tue, Jan 6

6:10 am - 8:10 pmSOF-ORD

22h 00m2 stops

6:04 pm - 6:40 pmORD-SOF

16h 36m2 stops

$711United Airlines

Find Deal

Mon, Dec 8 - Wed, May 27

LOT flights from Bulgaria to Illinois

Our best LOT deals on Bulgaria to Illinois flight tickets

LOT

Dec 12

SOF6:35 pmSofia

33h 25m

1 stop

ORD8:00 pmChicago O'Hare Intl

Jun 4

ORD9:40 pmChicago O'Hare Intl

20h 20m

1 stop

SOF2:00 amSofia

$661

Find similar

LOT

Mar 3

SOF6:35 pmSofia

33h 25m

1 stop

ORD8:00 pmChicago O'Hare Intl

Mar 14

ORD10:55 pmChicago O'Hare Intl

31h 55m

1 stop

SOF1:50 pmSofia

$664

Find similar

LOT

Apr 24

SOF6:45 pmSofia

28h 25m

1 stop

ORD3:10 pmChicago O'Hare Intl

Apr 28

ORD9:40 pmChicago O'Hare Intl

12h 20m

1 stop

SOF6:00 pmSofia

$665

Find similar

Austrian Airlines flights from Bulgaria to Illinois

Our best Austrian Airlines deals on Bulgaria to Illinois flight tickets

Austrian Airlines

Nov 21

VAR4:00 pmVarna

30h 00m

1 stop

ORD2:00 pmChicago O'Hare Intl

Nov 28

ORD5:50 pmChicago O'Hare Intl

37h 25m

2 stops

VAR3:15 pmVarna

$694

Find similar

Austrian Airlines

Nov 21

VAR4:00 pmVarna

30h 00m

1 stop

ORD2:00 pmChicago O'Hare Intl

Nov 28

ORD9:05 pmChicago O'Hare Intl

34h 10m

2 stops

VAR3:15 pmVarna

$701

Find similar

Austrian Airlines

Nov 21

VAR4:00 pmVarna

30h 00m

1 stop

ORD2:00 pmChicago O'Hare Intl

Nov 28

ORD4:20 pmChicago O'Hare Intl

14h 55m

1 stop

VAR3:15 pmVarna

$707

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 12/12

6:35 pm-8:00 pm

1 stop33h 25m

Chicago O'Hare Intl

Thu 6/4

9:40 pm-2:00 am

1 stop20h 20m

$661

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 3/3

6:35 pm-8:00 pm

1 stop33h 25m

Chicago O'Hare Intl

Sat 3/14

10:55 pm-1:50 pm

1 stop31h 55m

$664

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 12/14

9:40 pm-10:05 am

1 stop20h 25m

Chicago O'Hare Intl

Tue 12/30

11:50 am-8:45 am

1 stop12h 55m

$680

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 11/20

9:40 pm-10:05 am

1 stop20h 25m

Chicago O'Hare Intl

Wed 12/3

11:50 am-8:45 am

1 stop12h 55m

$682

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 3/6

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Fri 3/13

5:25 pm-2:05 pm

1 stop13h 40m

$692

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 3/5

7:00 am-5:56 pm

2 stops18h 56m

Chicago O'Hare Intl

Fri 3/13

5:25 pm-2:05 pm

1 stop13h 40m

$698

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 12/14

6:05 am-3:20 pm

2 stops17h 15m

Chicago O'Hare Intl

Tue 12/30

6:00 pm-1:15 pm

1 stop11h 15m

$699

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 12/14

6:05 am-3:20 pm

2 stops17h 15m

Chicago O'Hare Intl

Tue 12/30

6:00 pm-1:15 pm

1 stop11h 15m

$701

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 12/15

2:20 pm-8:05 pm

1 stop13h 45m

Chicago O'Hare Intl

Tue 1/6

2:18 pm-1:15 pm

2 stops14h 57m

$710

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 12/8

6:10 am-8:10 pm

2 stops22h 00m

Chicago O'Hare Intl

Wed 5/27

6:04 pm-6:40 pm

2 stops16h 36m

$711

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 February. Flight prices, which tend to average around $673, 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 February, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $679.

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 $718 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 $639 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 November 2025, there are 8 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
LOT	PriceFrom $532	Free Cancellation	Rating 7.6 1,135 reviews	Search LOT flights
British Airways	PriceFrom $546	Free Cancellation	Rating 6.7 7,500 reviews	Search British Airways flights
Air France	PriceFrom $560	Free Cancellation	Rating 7.4 1,484 reviews	Search Air France flights
Turkish Airlines	PriceFrom $601	Free Cancellation	Rating 7.3 4,032 reviews	Search Turkish Airlines flights
KLM	PriceFrom $604	Free Cancellation	Rating 7.7 1,405 reviews	Search KLM flights
Lufthansa	PriceFrom $630	Free Cancellation	Rating 6.8 7,558 reviews	Search Lufthansa flights
United Airlines	PriceFrom $641	Free Cancellation	Rating 7.4 9,007 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $647	Free Cancellation	Rating 7.6 865 reviews	Search Austrian Airlines 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.