What airlines fly to Chicago?

LOT, Lufthansa and United Airlines are the top three most popular airlines that fly to Chicago from Sofia according to our data. LOT is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Chicago. Keep in mind that there are 6 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

Which layover airport offers the lowest fares from Sofia to Chicago?

Flights via Belgrade (BEG) offer the lowest average round-trip price of $664.

Which layover airport has the shortest travel time from Sofia to Chicago?

Flights connecting via Zurich (ZRH) have the shortest average one-way travel time: 12h 58m.

Which layover airport has the shortest connection time from Sofia to Chicago?

Zurich (ZRH) has the shortest average layover time for this route: 1h 16m.

What is the cheapest airline that flies from Sofia to Chicago?

Air Serbia is the most popular carrier operating from Sofia to Chicago

Which airport is the most popular layover for flights between Sofia and Chicago?

Warsaw (WAW) was the most common stop: 39% of momondo users choosing 1-stop flights on this route connected there.

When did momondo last update prices for flights from Sofia Airport to Chicago?

Prices for flights from Sofia Airport to Chicago are updated daily.

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

There are 6 operators available for flights from Sofia Airport to Chicago as of January 2026.

How old do you have to be to fly from Sofia Airport to Chicago?

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 Sofia Airport to Chicago.

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

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

$406 Cheap Flights from Sofia to Chicago in 2026

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Find the cheapest flights from Sofia to Chicago

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One-way

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Cheap round-trip flights

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5:25 am - 7:50 pm

SOF

ORD

22h 25m1 stop

5:10 pm - 1:55 pm

ORD

SOF

36h 45m2 stops

$675LOT

Wed, Apr 8 - Wed, Sep 9

9:00 pm - 4:25 pm

SOF

ORD

26h 25m1 stop

1:16 pm - 7:20 pm

ORD

SOF

22h 04m2 stops

$676British Airways

Wed, Mar 18 - Sun, May 31

6:35 pm - 7:55 pm

SOF

ORD

33h 20m2 stops

10:55 pm - 5:50 pm

ORD

SOF

35h 55m2 stops

$677LOT

Sun, Feb 22 - Sun, Mar 8

5:25 pm - 6:00 pm

SOF

ORD

31h 35m2 stops

1:16 pm - 7:20 pm

ORD

SOF

22h 04m2 stops

$681British Airways

Mon, Mar 16 - Sun, May 31

2:35 pm - 8:00 pm

SOF

ORD

13h 25m1 stop

9:50 pm - 1:55 am

ORD

SOF

20h 05m1 stop

$691LOT

Sun, Mar 1 - Thu, Aug 27

5:25 am - 7:50 pm

SOF

ORD

22h 25m1 stop

5:10 pm - 1:55 pm

ORD

SOF

36h 45m2 stops

$694LOT

Mon, Apr 13 - Thu, May 7

4:00 pm - 3:00 pm

SOF

ORD

31h 00m1 stop

6:30 pm - 10:50 pm

ORD

SOF

20h 20m3 stops

$720Multiple Airlines

Thu, Feb 12 - Wed, Feb 25

7:00 am - 6:40 pm

SOF

MDW

19h 40m2 stops

1:49 pm - 2:05 pm

MDW

SOF

16h 16m2 stops

$735Multiple Airlines

Thu, Feb 12 - Wed, Feb 25

7:00 am - 5:54 pm

SOF

MDW

17h 54m2 stops

2:05 pm - 2:05 pm

MDW

SOF

17h 00m2 stops

$814KLM

Tue, Mar 10 - Tue, Mar 24

7:00 am - 5:54 pm

SOF

MDW

18h 54m2 stops

1:00 pm - 2:00 pm

MDW

SOF

17h 00m2 stops

$1,154KLM

Sun, Mar 29 - Tue, May 12

Air Canada flights from Sofia to Chicago

Our best Air Canada deals on Sofia to Chicago flight tickets

Air Canada

Mar 17

SOF6:00 amSofia

36h 18m

2 stops

ORD11:18 amChicago O'Hare Intl

Jun 1

ORD8:45 amChicago O'Hare Intl

18h 10m

2 stops

SOF10:55 amSofia

$755

Find similar

Air Canada

Mar 16

SOF6:10 amSofia

42h 38m

2 stops

ORD5:48 pmChicago O'Hare Intl

Jun 3

ORD8:45 amChicago O'Hare Intl

17h 55m

2 stops

SOF10:40 amSofia

$760

Find similar

Air Canada

Apr 29

SOF1:50 pmSofia

16h 13m

2 stops

ORD10:03 pmChicago O'Hare Intl

Aug 29

ORD8:45 amChicago O'Hare Intl

18h 15m

2 stops

SOF11:00 amSofia

$762

Find similar

Lufthansa flights from Sofia to Chicago

Our best Lufthansa deals on Sofia to Chicago flight tickets

Lufthansa

Jan 23

SOF6:10 amSofia

17h 10m

1 stop

ORD3:20 pmChicago O'Hare Intl

Feb 5

ORD9:50 pmChicago O'Hare Intl

16h 55m

1 stop

SOF10:45 pmSofia

$731

Find similar

Lufthansa

Jan 23

SOF6:10 amSofia

17h 10m

1 stop

ORD3:20 pmChicago O'Hare Intl

Feb 5

ORD3:20 pmChicago O'Hare Intl

13h 55m

2 stops

SOF1:15 pmSofia

$740

Find similar

Lufthansa

Jan 16

SOF6:05 amSofia

17h 15m

2 stops

ORD3:20 pmChicago O'Hare Intl

Jan 29

ORD6:25 pmChicago O'Hare Intl

34h 50m

2 stops

SOF1:15 pmSofia

$968

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 4/8

5:25 am-7:50 pm

1 stop22h 25m

Chicago O'Hare Intl

Wed 9/9

5:10 pm-1:55 pm

2 stops36h 45m

$675

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 3/18

9:00 pm-4:25 pm

1 stop26h 25m

Chicago O'Hare Intl

Sun 5/31

1:16 pm-7:20 pm

2 stops22h 04m

$676

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 2/22

6:35 pm-7:55 pm

2 stops33h 20m

Chicago O'Hare Intl

Sun 3/8

10:55 pm-5:50 pm

2 stops35h 55m

$677

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 3/16

5:25 pm-6:00 pm

2 stops31h 35m

Chicago O'Hare Intl

Sun 5/31

1:16 pm-7:20 pm

2 stops22h 04m

$681

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 3/1

2:35 pm-8:00 pm

1 stop13h 25m

Chicago O'Hare Intl

Thu 8/27

9:50 pm-1:55 am

1 stop20h 05m

$691

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 4/13

5:25 am-7:50 pm

1 stop22h 25m

Chicago O'Hare Intl

Thu 5/7

5:10 pm-1:55 pm

2 stops36h 45m

$694

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 2/12

4:00 pm-3:00 pm

1 stop31h 00m

Chicago O'Hare Intl

Wed 2/25

6:30 pm-10:50 pm

3 stops20h 20m

$720

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Thu 2/12

7:00 am-6:40 pm

2 stops19h 40m

Chicago Midway

Wed 2/25

1:49 pm-2:05 pm

2 stops16h 16m

$735

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Tue 3/10

7:00 am-5:54 pm

2 stops17h 54m

Chicago Midway

Tue 3/24

2:05 pm-2:05 pm

2 stops17h 00m

$814

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Sun 3/29

7:00 am-5:54 pm

2 stops18h 54m

Chicago Midway

Tue 5/12

1:00 pm-2:00 pm

2 stops17h 00m

$1,154

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 Sofia 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

Layovers

What is the cheapest month to fly to Chicago?

The month of February is, on average, the cheapest month to fly to Chicago from Sofia, with most prices found around $673. If you’re not able to fly to Chicago in February, then April is your next best option. Flight prices from Sofia to Chicago during April average around $679.

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

You are more likely to see cheaper flights to Chicago from Sofia when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $727 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Sofia for as low as $630 on momondo.

How have Sofia to Chicago flight prices changed over time?

As of January 2026, prices for Sofia to Chicago flights are approximately 0% cheaper when compared to flights at the same time last year.

When to book flights from Sofia to Chicago

Are you open to changing your travel dates? Check out the ideal times to fly from Sofia to Chicago according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Sofia to Chicago (SOF to CHI) flight deals and tips

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

Fastest flight time	15h 20m
Direct flights	None

The fastest flight from Sofia to Chicago takes 15h 20m

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

Search flight deals

How far is Sofia to Chicago by plane?
A flight from Sofia to Chicago will travel around 5185.9 mi. 15h 20m is a normal flight duration for this route.
When did momondo last update prices for flights from Sofia Airport to Chicago?
Prices for flights from Sofia Airport to Chicago are updated daily.
How many operators does momondo search for flights from Sofia Airport to Chicago?
There are 6 operators available for flights from Sofia Airport to Chicago as of January 2026.
How old do you have to be to fly from Sofia Airport to Chicago?
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 Sofia Airport to Chicago.
What documentation or ID do you need to fly to Chicago?
The travel and health documents you'll need for your trip to Chicago 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 Chicago. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Sofia to Chicago?
Based on momondo bookings for flights between Sofia and Chicago, the leading airline is Lufthansa, making up 29% of the total bookings. Other popular airlines include LOT with 27%, Turkish Airlines with 14%, and United Airlines with 14%.

Best airlines flying from Sofia to Chicago

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

Airline	Rating	Free Cancellation	Price
LOT	PriceFrom $532	Free Cancellation	Rating 7.5 1,168 reviews	Search LOT flights
KLM	PriceFrom $607	Free Cancellation	Rating 7.7 1,434 reviews	Search KLM flights
Turkish Airlines	PriceFrom $625	Free Cancellation	Rating 7.3 4,150 reviews	Search Turkish Airlines flights
Lufthansa	PriceFrom $642	Free Cancellation	Rating 6.8 7,692 reviews	Search Lufthansa flights
United Airlines	PriceFrom $643	Free Cancellation	Rating 7.4 9,139 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $647	Free Cancellation	Rating 7.6 889 reviews	Search Austrian Airlines flights

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Saint John

Why use momondo?

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

Finding the right flight to Chicago from Sofia 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 Chicago quick and easy, saving you time and money.

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

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

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

Once all potential Sofia to Chicago flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Chicago, momondo offers a useful price alert feature which will track prices for flights to Chicago from Sofia and alert you when they change.