What airlines fly to Bulgaria?

Turkish Airlines, Lufthansa and LOT are the top three most popular airlines that fly to Bulgaria from Illinois according to our data. Turkish Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Bulgaria. Keep in mind that there are 12 different airlines that fly to Bulgaria on a routine basis, so you have a few additional options to choose from.

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

Lufthansa and Austrian Airlines are the most popular carriers operating from Illinois to Bulgaria

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

Prices for flights from Illinois to Bulgaria are refreshed on a daily basis.

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

As of August 2026, there are 13 operators available to choose from for flights from Illinois to Bulgaria.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois to Bulgaria.

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

The travel and health documents you'll need for your trip to Bulgaria 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 Bulgaria. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$329 Cheap Flights from Illinois to Bulgaria in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Bulgaria

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:59 pm - 8:10 pmORD Chicago O'Hare Intl-SOF Sofia

39h 11m2 stops Philadelphia London Heathrow

5:15 pm - 4:49 pmSOF Sofia-ORD Chicago O'Hare Intl

31h 34m2 stops London Heathrow New York John F Kennedy Intl

$731British Airways

Mon, Jan 18 - Mon, Feb 1

8:52 am - 1:15 pmORD Chicago O'Hare Intl-SOF Sofia

20h 23m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

6:00 am - 2:10 pmSOF Sofia-ORD Chicago O'Hare Intl

16h 10m1 stop Munich Franz Josef Strauss

$731United Airlines

Mon, Dec 28 - Tue, Jan 12

10:05 am - 1:25 pmORD Chicago O'Hare Intl-SOF Sofia

19h 20m2 stops Toronto Pearson Intl Frankfurt am Main

7:05 pm - 6:25 pmSOF Sofia-ORD Chicago O'Hare Intl

31h 20m1 stop Munich Franz Josef Strauss

$732Multiple Airlines

Mon, Feb 15 - Mon, Mar 1

9:50 pm - 1:50 pmORD Chicago O'Hare Intl-SOF Sofia

32h 00m1 stop Warsaw Frederic Chopin

2:35 pm - 7:55 pmSOF Sofia-ORD Chicago O'Hare Intl

13h 20m1 stop Warsaw Frederic Chopin

$733LOT

Tue, Nov 3 - Sun, Nov 15

9:50 pm - 5:55 pmORD Chicago O'Hare Intl-SOF Sofia

12h 05m1 stop Warsaw Frederic Chopin

6:40 pm - 7:55 pmSOF Sofia-ORD Chicago O'Hare Intl

33h 15m1 stop Warsaw Frederic Chopin

$733LOT

Fri, Jan 15 - Fri, Jan 29

6:50 pm - 3:05 pmORD Chicago O'Hare Intl-SOF Sofia

12h 15m1 stop Zurich

3:00 pm - 4:15 pmSOF Sofia-ORD Chicago O'Hare Intl

33h 15m1 stop Zurich

$733SWISS

Wed, Feb 10 - Mon, Feb 22

9:50 pm - 8:10 pmORD Chicago O'Hare Intl-SOF Sofia

14h 20m1 stop London Heathrow

5:15 pm - 1:45 pmSOF Sofia-ORD Chicago O'Hare Intl

28h 30m1 stop London Heathrow

$733British Airways

Tue, Feb 9 - Mon, Feb 22

12:50 pm - 3:05 pmORD Chicago O'Hare Intl-SOF Sofia

18h 15m2 stops Toronto Pearson Intl Zurich

2:10 pm - 2:52 pmSOF Sofia-ORD Chicago O'Hare Intl

32h 42m2 stops Frankfurt am Main Montreal Pierre Elliott Trudeau Intl

$735Multiple Airlines

Wed, Nov 18 - Wed, Dec 2

11:09 am - 1:15 pmORD Chicago O'Hare Intl-SOF Sofia

18h 06m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

6:25 am - 3:38 pmSOF Sofia-ORD Chicago O'Hare Intl

17h 13m2 stops Frankfurt am Main Toronto Pearson Intl

$737United Airlines

Mon, Dec 28 - Wed, Jan 13

6:50 pm - 1:15 pmORD Chicago O'Hare Intl-SOF Sofia

34h 25m2 stops Zurich Munich Franz Josef Strauss

3:00 pm - 4:15 pmSOF Sofia-ORD Chicago O'Hare Intl

33h 15m1 stop Zurich

$756SWISS

Tue, Feb 9 - Mon, Feb 22

Cheap last minute flights

Enter your travel dates to find the best prices.

8:10 pm - 8:20 pmORD Chicago O'Hare Intl-SOF Sofia

16h 10m1 stop Istanbul

9:10 pm - 9:40 amSOF Sofia-ORD Chicago O'Hare Intl

20h 30m1 stop Istanbul

$830Turkish Airlines

Sun, Aug 23 - Wed, Oct 7

8:10 pm - 8:45 amORD Chicago O'Hare Intl-SOF Sofia

28h 35m1 stop Istanbul

3:50 pm - 9:40 amSOF Sofia-ORD Chicago O'Hare Intl

25h 50m1 stop Istanbul

$864Turkish Airlines

Thu, Aug 20 - Wed, Sep 30

9:40 pm - 11:15 pmORD Chicago O'Hare Intl-SOF Sofia

17h 35m1 stop Munich Franz Josef Strauss

12:55 pm - 6:15 pmSOF Sofia-ORD Chicago O'Hare Intl

13h 20m1 stop Munich Franz Josef Strauss

$882Lufthansa

Mon, Aug 24 - Fri, Sep 4

4:05 pm - 6:00 pmORD Chicago O'Hare Intl-SOF Sofia

17h 55m1 stop Frankfurt am Main

12:55 pm - 6:15 pmSOF Sofia-ORD Chicago O'Hare Intl

13h 20m1 stop Munich Franz Josef Strauss

$891Lufthansa

Mon, Aug 24 - Fri, Sep 4

2:20 pm - 12:15 pmORD Chicago O'Hare Intl-SOF Sofia

13h 55m1 stop Zurich

12:55 pm - 6:15 pmSOF Sofia-ORD Chicago O'Hare Intl

13h 20m1 stop Munich Franz Josef Strauss

$912Multiple Airlines

Mon, Aug 24 - Fri, Sep 4

9:50 pm - 1:55 amORD Chicago O'Hare Intl-SOF Sofia

20h 05m1 stop Warsaw Frederic Chopin

6:45 pm - 3:05 pmSOF Sofia-ORD Chicago O'Hare Intl

28h 20m2 stops Warsaw Frederic Chopin Krakow J. Paul II Balice

$916LOT

Mon, Aug 24 - Wed, Sep 9

9:50 pm - 1:55 amORD Chicago O'Hare Intl-SOF Sofia

20h 05m1 stop Warsaw Frederic Chopin

2:35 pm - 3:10 pmSOF Sofia-ORD Chicago O'Hare Intl

32h 35m1 stop Warsaw Frederic Chopin

$934LOT

Mon, Aug 24 - Wed, Sep 9

2:20 pm - 12:15 pmORD Chicago O'Hare Intl-SOF Sofia

13h 55m1 stop Zurich

3:40 pm - 12:35 pmSOF Sofia-ORD Chicago O'Hare Intl

28h 55m1 stop Zurich

$974SWISS

Mon, Aug 24 - Mon, Sep 7

9:40 pm - 6:40 pmORD Chicago O'Hare Intl-SOF Sofia

13h 00m1 stop Munich Franz Josef Strauss

6:20 am - 2:52 pmSOF Sofia-ORD Chicago O'Hare Intl

16h 32m2 stops Frankfurt am Main Montreal Pierre Elliott Trudeau Intl

$981Multiple Airlines

Sun, Aug 23 - Wed, Oct 7

2:20 pm - 12:10 pmORD Chicago O'Hare Intl-SOF Sofia

13h 50m2 stops Zurich Munich Franz Josef Strauss

3:40 pm - 3:55 pmSOF Sofia-ORD Chicago O'Hare Intl

32h 15m1 stop Zurich

$1,013SWISS

Mon, Aug 24 - Mon, Sep 7

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United Airlines flights from Illinois to Bulgaria

Our best United Airlines deals on Illinois to Bulgaria flight tickets

United Airlines

Dec 28

ORD8:52 amChicago O'Hare Intl

20h 23m

2 stops

SOF1:15 pmSofia

Jan 12

SOF6:00 amSofia

16h 10m

1 stop

ORD2:10 pmChicago O'Hare Intl

$731

United Airlines

Dec 28

ORD11:09 amChicago O'Hare Intl

18h 06m

2 stops

SOF1:15 pmSofia

Jan 13

SOF6:25 amSofia

17h 13m

2 stops

ORD3:38 pmChicago O'Hare Intl

$737

United Airlines

Dec 27

ORD11:09 amChicago O'Hare Intl

18h 06m

2 stops

SOF1:15 pmSofia

Jan 12

SOF6:00 amSofia

19h 43m

2 stops

ORD5:43 pmChicago O'Hare Intl

$739

Air Canada flights from Illinois to Bulgaria

Our best Air Canada deals on Illinois to Bulgaria flight tickets

Air Canada

Feb 13

ORD3:35 pmChicago O'Hare Intl

37h 50m

2 stops

SOF1:25 pmSofia

Feb 23

SOF6:25 amSofia

40h 07m

2 stops

ORD2:32 pmChicago O'Hare Intl

$738

Air Canada

Dec 28

ORD3:45 pmChicago O'Hare Intl

37h 40m

2 stops

SOF1:25 pmSofia

Jan 11

SOF2:00 pmSofia

56h 32m

2 stops

ORD2:32 pmChicago O'Hare Intl

$752

Air Canada

Nov 4

ORD7:05 amChicago O'Hare Intl

22h 10m

2 stops

SOF1:15 pmSofia

Nov 17

SOF6:25 amSofia

36h 42m

2 stops

ORD11:07 amChicago O'Hare Intl

$785

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Mon 1/18

8:59 pm-8:10 pm

2 stops39h 11m

Sofia

Mon 2/1

5:15 pm-4:49 pm

2 stops31h 34m

$731

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Mon 12/28

8:52 am-1:15 pm

2 stops20h 23m

Sofia

Tue 1/12

6:00 am-2:10 pm

1 stop16h 10m

$731

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Mon 2/15

10:05 am-1:25 pm

2 stops19h 20m

Sofia

Mon 3/1

7:05 pm-6:25 pm

1 stop31h 20m

$732

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Tue 11/3

9:50 pm-1:50 pm

1 stop32h 00m

Sofia

Sun 11/15

2:35 pm-7:55 pm

1 stop13h 20m

$733

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Fri 1/15

9:50 pm-5:55 pm

1 stop12h 05m

Sofia

Fri 1/29

6:40 pm-7:55 pm

1 stop33h 15m

$733

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Wed 2/10

6:50 pm-3:05 pm

1 stop12h 15m

Sofia

Mon 2/22

3:00 pm-4:15 pm

1 stop33h 15m

$733

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Tue 2/9

9:50 pm-8:10 pm

1 stop14h 20m

Sofia

Mon 2/22

5:15 pm-1:45 pm

1 stop28h 30m

$733

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Wed 11/18

12:50 pm-3:05 pm

2 stops18h 15m

Sofia

Wed 12/2

2:10 pm-2:52 pm

2 stops32h 42m

$735

Quickest round-trip

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Mon 12/28

11:09 am-1:15 pm

2 stops18h 06m

Sofia

Wed 1/13

6:25 am-3:38 pm

2 stops17h 13m

$737

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Tue 2/9

6:50 pm-1:15 pm

2 stops34h 25m

Sofia

Mon 2/22

3:00 pm-4:15 pm

1 stop33h 15m

$756

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 Illinois to Bulgaria

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

What is the cheapest month to fly to Bulgaria?

If you aren’t able to travel to Bulgaria during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $608.

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

You are more likely to see cheaper flights to Bulgaria from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Bulgaria for around $796 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bulgaria from Illinois for as low as $736 on momondo.

Can stopping save me money on Illinois to Bulgaria flights?

You could potentially save up to 16% on your flight if you consider stops on a Illinois to Bulgaria flight.

Cheap Illinois to Bulgaria flight deals and tips

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

Best Price Found	$329
Fastest flight time	12h 35m
Direct flights	None

The best one-way flight to Bulgaria from Illinois in the past 72 hours is $329. The best round-trip flight deal from Illinois to Bulgaria found on momondo in the last 72 hours is $731.

The fastest flight from Illinois to Bulgaria takes 12h 35m

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

Search flight deals

Frequently asked questions about flying from Illinois to Bulgaria

When did momondo last update prices for flights from Illinois to Bulgaria?
Prices for flights from Illinois to Bulgaria are refreshed on a daily basis.
How many operators does momondo search for flights from Illinois to Bulgaria?
As of August 2026, there are 13 operators available to choose from for flights from Illinois to Bulgaria.
How old do you have to be to fly from Illinois to Bulgaria?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois to Bulgaria.
What documentation or ID do you need to fly to Bulgaria?
The travel and health documents you'll need for your trip to Bulgaria 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 Bulgaria. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Illinois to Bulgaria

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

Airline	Rating	Free Cancellation	Price
Turkish Airlines	PriceFrom $524	Free Cancellation	Rating 7.4 4,477 reviews	Search Turkish Airlines flights
LOT	PriceFrom $583	Free Cancellation	Rating 7.5 1,211 reviews	Search LOT flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.5 1,647 reviews	Search Air France flights
SWISS	PriceFrom $594	Free Cancellation	Rating 7.5 2,036 reviews	Search SWISS flights
Lufthansa	PriceFrom $607	Free Cancellation	Rating 6.8 8,199 reviews	Search Lufthansa flights
United Airlines	PriceFrom $608	Free Cancellation	Rating 7.4 10,102 reviews	Search United Airlines flights
British Airways	PriceFrom $609	Free Cancellation	Rating 6.7 8,178 reviews	Search British Airways flights
KLM	PriceFrom $614	Free Cancellation	Rating 7.8 1,559 reviews	Search KLM flights
Austrian Airlines	PriceFrom $701	Free Cancellation	Rating 7.6 948 reviews	Search Austrian Airlines flights
Air Serbia	PriceFrom $703	Free Cancellation	Rating 6.1 236 reviews	Search Air Serbia flights

Why use momondo?

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

It is quick and easy to find Illinois to Bulgaria flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Bulgaria that suits you.

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

All flight searches from Illinois to Bulgaria on momondo can be filtered to show those which offer flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to Bulgaria from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to Bulgaria from Illinois. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Bulgaria trip

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Popular cities

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Complete your trip

Feeling lucky

Popular cities in Bulgaria

Flights to Sofiafrom $568

Flights to Varnafrom $728

Flights to Burgasfrom $862

Flights to Plovdivfrom $910

Cheap flights from Illinois to Bulgaria from $329

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Bulgaria departing on 9/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Illinois to Bulgaria

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Cheap last minute flights

Big names and deals

Big names and deals

Filter for what you want

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Trusted and free

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United Airlines flights from Illinois to Bulgaria

Our best United Airlines deals on Illinois to Bulgaria flight tickets

Air Canada flights from Illinois to Bulgaria

Our best Air Canada deals on Illinois to Bulgaria flight tickets

momondo Fare Finder

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

See travel insights to Bulgaria from

How to get the cheapest flight ticket from Illinois to Bulgaria

What is the cheapest month to fly to Bulgaria?

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

Can stopping save me money on Illinois to Bulgaria flights?

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

What airlines fly to Bulgaria?

Cheap Illinois to Bulgaria flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Illinois to Bulgaria

Best airlines flying from Illinois to Bulgaria

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

Why use momondo?

An easier way to manage your Bulgaria trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Bulgaria

Popular cities in Bulgaria

Popular flights according to clicks in the last 7 days on momondo

Illinois flight routes

According to popular flight searches on momondo this year

Bulgaria flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Bulgaria

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Bulgaria

List of cabin classes available on flights landing in Bulgaria. Availability may vary depending on flight origin and airline.

Complete your trip to Bulgaria

Explore popular destinations other users love

According to popular flight searches on momondo this year