How long does it take to fly to Chicago?

Average flight duration from Bulgaria to Chicago depends on which airport you fly into and out of. Flying from Sofia to Chicago O'Hare Intl Airport is 15h 15m on average, while flying from Varna to Chicago O'Hare Intl Airport is 45h 41m on average. Chicago O'Hare Intl Airport is the most popular airport in Chicago.

What airlines fly to Chicago?

LOT, Lufthansa and United Airlines are the top three most popular airlines that fly to Chicago from Bulgaria according to our data. LOT is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Chicago. Keep in mind that there are 7 different airlines that fly to Chicago 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 Chicago?

Prices for flights from Bulgaria to Chicago refresh daily.

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

There are 7 operators available for flights from Bulgaria to Chicago as of December 2025.

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

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 Bulgaria to Chicago.

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

The necessary travel and health documents for your Chicago trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$344 Cheap Flights from Bulgaria to Chicago in 2025/26

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Find the cheapest flights from Bulgaria to Chicago

Round-trip

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Recent round-trip flight deals from Bulgaria to Chicago

Enter your travel dates to find the best prices.

6:35 pm - 8:00 pm

SOF

ORD

33h 25m1 stop

9:55 pm - 1:50 pm

ORD

SOF

31h 55m1 stop

$675LOT

Fri, Jan 30 - Mon, Feb 2

6:45 pm - 7:50 pm

SOF

ORD

33h 05m1 stop

9:50 pm - 1:55 pm

ORD

SOF

32h 05m1 stop

$676LOT

Fri, Apr 10 - Wed, Apr 29

6:45 pm - 7:50 pm

SOF

ORD

33h 05m1 stop

9:50 pm - 1:55 pm

ORD

SOF

32h 05m1 stop

$677LOT

Fri, Apr 10 - Wed, Apr 29

6:45 pm - 7:50 pm

SOF

ORD

33h 05m2 stops

5:10 pm - 1:55 pm

ORD

SOF

12h 45m1 stop

$682LOT

Thu, Apr 9 - Fri, May 1

7:00 am - 2:20 pm

SOF

ORD

15h 20m1 stop

5:20 pm - 1:55 pm

ORD

SOF

12h 35m1 stop

$687Multiple Airlines

Fri, Jan 16 - Sun, Jan 25

7:00 am - 2:20 pm

SOF

ORD

15h 20m1 stop

12:55 pm - 1:55 pm

ORD

SOF

17h 00m2 stops

$691Multiple Airlines

Fri, Jan 16 - Sat, Jan 24

7:00 am - 2:20 pm

SOF

ORD

15h 20m1 stop

4:25 pm - 2:05 pm

ORD

SOF

13h 40m1 stop

$693KLM

Fri, Jan 16 - Sat, Jan 24

7:00 am - 2:20 pm

SOF

ORD

15h 20m1 stop

1:57 pm - 2:05 pm

ORD

SOF

16h 08m2 stops

$697KLM

Fri, Jan 16 - Fri, Jan 23

10:00 am - 6:25 pm

VAR

ORD

16h 25m1 stop

12:50 pm - 9:10 am

ORD

VAR

13h 20m1 stop

$1,207Turkish Airlines

Tue, Jan 6 - Thu, Mar 26

9:25 pm - 6:25 pm

VAR

ORD

29h 00m1 stop

12:50 pm - 9:10 am

ORD

VAR

13h 20m1 stop

$1,243Turkish Airlines

Mon, Jan 5 - Thu, Mar 26

LOT flights from Bulgaria to Chicago

Our best LOT deals on Bulgaria to Chicago flight tickets

LOT

Jan 30

SOF6:35 pmSofia

33h 25m

1 stop

ORD8:00 pmChicago O'Hare Intl

Feb 2

ORD9:55 pmChicago O'Hare Intl

31h 55m

1 stop

SOF1:50 pmSofia

$675

Find similar

LOT

Apr 10

SOF6:45 pmSofia

33h 05m

1 stop

ORD7:50 pmChicago O'Hare Intl

Apr 29

ORD9:50 pmChicago O'Hare Intl

32h 05m

1 stop

SOF1:55 pmSofia

$676

Find similar

LOT

Apr 10

SOF6:45 pmSofia

33h 05m

1 stop

ORD7:50 pmChicago O'Hare Intl

Apr 29

ORD9:50 pmChicago O'Hare Intl

32h 05m

1 stop

SOF1:55 pmSofia

$677

Find similar

KLM flights from Bulgaria to Chicago

Our best KLM deals on Bulgaria to Chicago flight tickets

KLM

Jan 16

SOF7:00 amSofia

15h 20m

1 stop

ORD2:20 pmChicago O'Hare Intl

Jan 24

ORD4:25 pmChicago O'Hare Intl

13h 40m

1 stop

SOF2:05 pmSofia

$693

Find similar

KLM

Jan 16

SOF7:00 amSofia

15h 20m

1 stop

ORD2:20 pmChicago O'Hare Intl

Jan 23

ORD1:57 pmChicago O'Hare Intl

16h 08m

2 stops

SOF2:05 pmSofia

$697

Find similar

KLM

Feb 5

SOF7:00 amSofia

19h 45m

2 stops

ORD6:45 pmChicago O'Hare Intl

Apr 1

ORD4:50 pmChicago O'Hare Intl

13h 10m

1 stop

SOF2:00 pmSofia

$701

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 1/30

6:35 pm-8:00 pm

1 stop33h 25m

Chicago O'Hare Intl

Mon 2/2

9:55 pm-1:50 pm

1 stop31h 55m

$675

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 4/10

6:45 pm-7:50 pm

1 stop33h 05m

Chicago O'Hare Intl

Wed 4/29

9:50 pm-1:55 pm

1 stop32h 05m

$676

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 4/10

6:45 pm-7:50 pm

1 stop33h 05m

Chicago O'Hare Intl

Wed 4/29

9:50 pm-1:55 pm

1 stop32h 05m

$677

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 4/9

6:45 pm-7:50 pm

2 stops33h 05m

Chicago O'Hare Intl

Fri 5/1

5:10 pm-1:55 pm

1 stop12h 45m

$682

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 1/16

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Sun 1/25

5:20 pm-1:55 pm

1 stop12h 35m

$687

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 1/16

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Sat 1/24

12:55 pm-1:55 pm

2 stops17h 00m

$691

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 1/16

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Sat 1/24

4:25 pm-2:05 pm

1 stop13h 40m

$693

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 1/16

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Fri 1/23

1:57 pm-2:05 pm

2 stops16h 08m

$697

VarnaChicago

VAR - ORD

VARORD

Varna

Tue 1/6

10:00 am-6:25 pm

1 stop16h 25m

Chicago O'Hare Intl

Thu 3/26

12:50 pm-9:10 am

1 stop13h 20m

$1,207

VarnaChicago

VAR - ORD

VARORD

Varna

Mon 1/5

9:25 pm-6:25 pm

1 stop29h 00m

Chicago O'Hare Intl

Thu 3/26

12:50 pm-9:10 am

1 stop13h 20m

$1,243

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 Chicago

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 Chicago?

The month of February is, on average, the cheapest month to fly to Chicago from Bulgaria, with most prices found around $674. If you’re not able to fly to Chicago in February, then April is your next best option. Flight prices from Bulgaria to Chicago during April average around $679.

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

The cheapest day to depart on your flight to Chicago is on a Thursday when prices can be found for as low as $666. This is often the case because there is less demand to fly during this day of the week. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Bulgaria to Chicago for around $785.

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

Our most recent data shows that the best time of day to fly to Chicago is in the afternoon. Flights from Bulgaria to Chicago during this time can be as low as $666. In contrast, the most expensive time of day to depart to Chicago is in the evening when prices are around $768.

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

You are more likely to see cheaper flights to Chicago from Bulgaria when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $725 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Bulgaria for as low as $631 on momondo.

Cheap Bulgaria to Chicago flight deals and tips

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

Fastest flight time	15h 15m
Direct flights	None

The fastest flight from Bulgaria to Chicago takes 15h 15m

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

Search flight deals

When did momondo last update prices for flights from Bulgaria to Chicago?
Prices for flights from Bulgaria to Chicago refresh daily.
How many operators does momondo search for flights from Bulgaria to Chicago?
There are 7 operators available for flights from Bulgaria to Chicago as of December 2025.
How old do you have to be to fly from Bulgaria to Chicago?
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 Bulgaria to Chicago.
What documentation or ID do you need to fly to Chicago?
The necessary travel and health documents for your Chicago trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Bulgaria to Chicago

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

Airline	Rating	Free Cancellation	Price
LOT	PriceFrom $533	Free Cancellation	Rating 7.5 1,149 reviews	Search LOT flights
British Airways	PriceFrom $546	Free Cancellation	Rating 6.7 7,585 reviews	Search British Airways flights
Turkish Airlines	PriceFrom $601	Free Cancellation	Rating 7.3 4,105 reviews	Search Turkish Airlines flights
KLM	PriceFrom $607	Free Cancellation	Rating 7.7 1,428 reviews	Search KLM flights
Lufthansa	PriceFrom $641	Free Cancellation	Rating 6.8 7,635 reviews	Search Lufthansa flights
United Airlines	PriceFrom $643	Free Cancellation	Rating 7.4 9,091 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $647	Free Cancellation	Rating 7.6 879 reviews	Search Austrian Airlines flights

Merrillville

New Buffalo

Hammond

Benton Harbor

Saint Joseph

Portage

Lansing

Valparaiso

Schererville

Crown Point

Munster

Chesterton

Monticello

Porter

Griffith

Saint John

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Bulgaria to Chicago. Millions of users trust and use momondo every year so you are in good hands.

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

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

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

momondo helps you find the best flight between Bulgaria and Chicago by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Bulgaria to Chicago now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Chicago and let you know when they change.