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

Istanbul (IST) was the most common stop: 30% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Paris (CDG) offer the lowest average round-trip price of $731.

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

Zurich (ZRH) has the shortest average layover time for this route: 0h 50m.

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

JetBlue is the most popular carrier operating from Sofia to Chicago

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 33% 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 has the shortest travel time from Sofia to Chicago?

Flights connecting via Zurich (ZRH) have the shortest average one-way travel time: 12h 50m.

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 September 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.

$359 Cheap Flights from Sofia to Chicago in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Sofia to Chicago

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:20 pm - 5:20 pmSOF Sofia-ORD Chicago O'Hare Intl

35h 00m2 stops Dublin Reykjavik Keflavik Intl

9:50 pm - 6:20 pmORD Chicago O'Hare Intl-SOF Sofia

12h 30m1 stop Munich Franz Josef Strauss

$826Multiple Airlines

Wed, Nov 11 - Tue, Jan 5

9:40 pm - 12:40 pmSOF Sofia-ORD Chicago O'Hare Intl

23h 00m2 stops Barcelona-El Prat Lisbon Humberto Delgado

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

12h 15m1 stop Zurich

$827Multiple Airlines

Wed, Sep 23 - Wed, Feb 3

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

13h 20m1 stop Warsaw Frederic Chopin

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

12h 05m1 stop Warsaw Frederic Chopin

$828LOT

Tue, Nov 3 - Tue, Jan 5

2:35 pm - 7:50 pmSOF Sofia-ORD Chicago O'Hare Intl

13h 15m1 stop Warsaw Frederic Chopin

9:50 pm - 6:00 pmORD Chicago O'Hare Intl-SOF Sofia

12h 10m1 stop Warsaw Frederic Chopin

$831LOT

Thu, Oct 1 - Thu, Oct 15

9:40 am - 6:20 pmSOF Sofia-ORD Chicago O'Hare Intl

16h 40m1 stop Istanbul

11:45 am - 11:05 amORD Chicago O'Hare Intl-SOF Sofia

15h 20m1 stop Istanbul

$842Turkish Airlines

Fri, Dec 18 - Sat, Jan 30

6:30 am - 12:55 pmSOF Sofia-ORD Chicago O'Hare Intl

14h 25m1 stop Frankfurt am Main

3:35 pm - 12:10 pmORD Chicago O'Hare Intl-SOF Sofia

12h 35m1 stop Munich Franz Josef Strauss

$848Lufthansa

Thu, Sep 24 - Wed, Oct 14

2:20 pm - 7:55 pmSOF Sofia-ORD Chicago O'Hare Intl

13h 35m1 stop Frankfurt am Main

9:50 pm - 10:55 pmORD Chicago O'Hare Intl-SOF Sofia

17h 05m1 stop Munich Franz Josef Strauss

$853Lufthansa

Mon, Sep 21 - Mon, Feb 1

9:40 am - 10:00 amSOF Sofia-ORD Chicago O'Hare Intl

32h 20m1 stop Istanbul

11:45 am - 8:55 pmORD Chicago O'Hare Intl-SOF Sofia

25h 10m1 stop Istanbul

$865Turkish Airlines

Wed, Dec 23 - Wed, Jan 13

6:20 am - 12:55 pmSOF Sofia-ORD Chicago O'Hare Intl

14h 35m1 stop Frankfurt am Main

6:00 pm - 10:55 pmORD Chicago O'Hare Intl-SOF Sofia

20h 55m1 stop Munich Franz Josef Strauss

$865United Airlines

Mon, Sep 21 - Sat, Jan 30

6:30 am - 7:55 pmSOF Sofia-ORD Chicago O'Hare Intl

21h 25m1 stop Frankfurt am Main

9:50 pm - 10:55 pmORD Chicago O'Hare Intl-SOF Sofia

17h 05m1 stop Munich Franz Josef Strauss

$865United Airlines

Thu, Sep 24 - Tue, Jan 26

Cheap last minute flights

Enter your travel dates to find the best prices.

5:15 pm - 4:00 pmSOF Sofia-ORD Chicago O'Hare Intl

30h 45m2 stops Madrid Barajas Lisbon Humberto Delgado

7:25 pm - 10:45 pmORD Chicago O'Hare Intl-SOF Sofia

19h 20m3 stops Reykjavik Keflavik Intl Kastrup Copenhagen Budapest Ferenc Liszt Intl

$840Multiple Airlines

Tue, Sep 15 - Tue, Oct 20

1:05 pm - 12:35 pmSOF Sofia-ORD Chicago O'Hare Intl

31h 30m1 stop Zurich

7:05 pm - 10:20 amORD Chicago O'Hare Intl-SOF Sofia

31h 15m1 stop Zurich

$879SWISS

Tue, Sep 15 - Tue, Oct 20

6:10 am - 6:37 pmSOF Sofia-ORD Chicago O'Hare Intl

20h 27m2 stops Frankfurt am Main Washington, D.C. Dulles Intl

12:09 pm - 12:10 pmORD Chicago O'Hare Intl-SOF Sofia

16h 01m2 stops Newark Munich Franz Josef Strauss

$900United Airlines

Tue, Sep 15 - Tue, Oct 20

6:10 am - 8:12 pmSOF Sofia-ORD Chicago O'Hare Intl

22h 02m2 stops Frankfurt am Main Montreal Pierre Elliott Trudeau Intl

7:05 am - 1:25 pmORD Chicago O'Hare Intl-SOF Sofia

22h 20m2 stops Montreal Pierre Elliott Trudeau Intl Frankfurt am Main

$902Air Canada

Tue, Sep 15 - Thu, Nov 19

6:10 am - 4:29 pmSOF Sofia-ORD Chicago O'Hare Intl

18h 19m2 stops Frankfurt am Main Washington, D.C. Dulles Intl

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

13h 00m1 stop Munich Franz Josef Strauss

$904United Airlines

Tue, Sep 15 - Tue, Oct 20

6:10 am - 4:29 pmSOF Sofia-ORD Chicago O'Hare Intl

18h 19m2 stops Frankfurt am Main Washington, D.C. Dulles Intl

3:15 pm - 1:25 pmORD Chicago O'Hare Intl-SOF Sofia

14h 10m1 stop Frankfurt am Main

$905United Airlines

Tue, Sep 15 - Thu, Nov 19

2:35 pm - 7:50 pmSOF Sofia-ORD Chicago O'Hare Intl

13h 15m1 stop Warsaw Frederic Chopin

9:50 pm - 6:00 pmORD Chicago O'Hare Intl-SOF Sofia

12h 10m1 stop Warsaw Frederic Chopin

$977LOT

Tue, Sep 15 - Wed, Sep 23

2:35 pm - 7:50 pmSOF Sofia-ORD Chicago O'Hare Intl

13h 15m1 stop Warsaw Frederic Chopin

5:10 pm - 1:50 pmORD Chicago O'Hare Intl-SOF Sofia

12h 40m1 stop Warsaw Frederic Chopin

$983LOT

Tue, Sep 15 - Mon, Sep 21

2:35 pm - 7:50 pmSOF Sofia-ORD Chicago O'Hare Intl

13h 15m1 stop Warsaw Frederic Chopin

9:50 pm - 6:00 pmORD Chicago O'Hare Intl-SOF Sofia

12h 10m1 stop Warsaw Frederic Chopin

$1,031LOT

Tue, Sep 15 - Tue, Sep 22

7:25 pm - 2:05 pmSOF Sofia-ORD Chicago O'Hare Intl

26h 40m1 stop Munich Franz Josef Strauss

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

17h 35m1 stop Munich Franz Josef Strauss

$1,169Lufthansa

Sat, Sep 12 - Mon, Sep 28

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LOT flights from Sofia to Chicago

Our best LOT deals on Sofia to Chicago flight tickets

LOT

Oct 1

SOF2:35 pmSofia

13h 15m

1 stop

ORD7:50 pmChicago O'Hare Intl

Nov 16

ORD9:50 pmChicago O'Hare Intl

32h 00m

1 stop

SOF1:50 pmSofia

$831

LOT

Sep 17

SOF2:35 pmSofia

13h 15m

1 stop

ORD7:50 pmChicago O'Hare Intl

Sep 22

ORD9:50 pmChicago O'Hare Intl

12h 10m

1 stop

SOF6:00 pmSofia

$892

LOT

Sep 17

SOF2:35 pmSofia

13h 15m

1 stop

ORD7:50 pmChicago O'Hare Intl

Sep 23

ORD9:50 pmChicago O'Hare Intl

12h 10m

1 stop

SOF6:00 pmSofia

$910

Air Canada flights from Sofia to Chicago

Our best Air Canada deals on Sofia to Chicago flight tickets

Air Canada

Nov 5

SOF6:00 amSofia

19h 43m

2 stops

ORD5:43 pmChicago O'Hare Intl

Nov 12

ORD12:50 pmChicago O'Hare Intl

16h 35m

2 stops

SOF1:25 pmSofia

$848

Air Canada

Sep 24

SOF6:30 amSofia

21h 42m

2 stops

ORD8:12 pmChicago O'Hare Intl

Feb 1

ORD10:33 amChicago O'Hare Intl

18h 42m

2 stops

SOF1:15 pmSofia

$872

Air Canada

Sep 24

SOF6:30 amSofia

21h 42m

2 stops

ORD8:12 pmChicago O'Hare Intl

Nov 24

ORD7:05 amChicago O'Hare Intl

22h 20m

2 stops

SOF1:25 pmSofia

$873

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Wed 11/11

2:20 pm-5:20 pm

2 stops35h 00m

Chicago O'Hare Intl

Tue 1/5

9:50 pm-6:20 pm

1 stop12h 30m

$826

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Wed 9/23

9:40 pm-12:40 pm

2 stops23h 00m

Chicago O'Hare Intl

Wed 2/3

6:50 pm-3:05 pm

1 stop12h 15m

$827

Quickest round-trip

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Tue 11/3

2:35 pm-7:55 pm

1 stop13h 20m

Chicago O'Hare Intl

Tue 1/5

9:50 pm-5:55 pm

1 stop12h 05m

$828

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Thu 10/1

2:35 pm-7:50 pm

1 stop13h 15m

Chicago O'Hare Intl

Thu 10/15

9:50 pm-6:00 pm

1 stop12h 10m

$831

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Fri 12/18

9:40 am-6:20 pm

1 stop16h 40m

Chicago O'Hare Intl

Sat 1/30

11:45 am-11:05 am

1 stop15h 20m

$842

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Thu 9/24

6:30 am-12:55 pm

1 stop14h 25m

Chicago O'Hare Intl

Wed 10/14

3:35 pm-12:10 pm

1 stop12h 35m

$848

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Mon 9/21

2:20 pm-7:55 pm

1 stop13h 35m

Chicago O'Hare Intl

Mon 2/1

9:50 pm-10:55 pm

1 stop17h 05m

$853

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Wed 12/23

9:40 am-10:00 am

1 stop32h 20m

Chicago O'Hare Intl

Wed 1/13

11:45 am-8:55 pm

1 stop25h 10m

$865

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Mon 9/21

6:20 am-12:55 pm

1 stop14h 35m

Chicago O'Hare Intl

Sat 1/30

6:00 pm-10:55 pm

1 stop20h 55m

$865

SofiaChicago

SOF Sofia - ORD Chicago O'Hare Intl

SOFORD

Sofia

Thu 9/24

6:30 am-7:55 pm

1 stop21h 25m

Chicago O'Hare Intl

Tue 1/26

9:50 pm-10:55 pm

1 stop17h 05m

$865

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 typical price of a round-trip flight between Sofia and Chicago?

Prices are currently typical for flights on this route.

Typical prices usually range from $734 to $882.
The lowest price recently found on this route was $826.

What is the cheapest month to fly to Chicago?

The month of November is, on average, the cheapest month to fly to Chicago from Sofia, with most prices found around $756. If you’re not able to fly to Chicago in November, then December is your next best option. Flight prices from Sofia to Chicago during December average around $773.

How far in advance should I book a flight from Sofia 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 $811 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 $705 on momondo.

How have Sofia to Chicago flight prices changed over time?

As of September 2026, prices for Sofia to Chicago flights are approximately 36% more expensive 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

Best Price Found	$359
Fastest flight time	16h 27m
Direct flights	None

The best one-way flight to Chicago from Sofia in the past 72 hours is $359. The best round-trip flight deal from Sofia to Chicago found on momondo in the last 72 hours is $826.

The fastest flight from Sofia to Chicago takes 16h 27m

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

Search flight deals

Frequently asked questions about flying from Sofia to Chicago

How far is Sofia to Chicago by plane?
A flight from Sofia to Chicago will travel around 5185.9 mi. 16h 27m 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 September 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 LOT, making up 30% of the total bookings. Other popular airlines include Lufthansa with 27%, Turkish Airlines with 21%, and United Airlines with 13%.

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
Turkish Airlines	PriceFrom $627	Free Cancellation	Rating 7.4 4,474 reviews	Search Turkish Airlines flights
LOT	PriceFrom $629	Free Cancellation	Rating 7.5 1,200 reviews	Search LOT flights
KLM	PriceFrom $652	Free Cancellation	Rating 7.8 1,576 reviews	Search KLM flights
Lufthansa	PriceFrom $714	Free Cancellation	Rating 6.8 8,216 reviews	Search Lufthansa flights
United Airlines	PriceFrom $735	Free Cancellation	Rating 7.4 10,189 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $806	Free Cancellation	Rating 7.6 954 reviews	Search Austrian Airlines flights

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Benton Harbor

Lansing

Saint Joseph

Valparaiso

Schererville

Munster

Chesterton

Monticello

Porter

Crown Point

Griffith

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.

An easier way to manage your Chicago 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.

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Fly into one of these airports located in Chicago

Chicago Midway Airport

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Chicago Greater Rockford Airport

Cheap flights from Sofia to Chicago from $359

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Sofia to Chicago departing on 10/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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LOT flights from Sofia to Chicago

Our best LOT deals on Sofia to Chicago flight tickets

Air Canada flights from Sofia to Chicago

Our best Air Canada deals on Sofia to Chicago flight tickets

momondo Fare Finder

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How to get the cheapest flight ticket from Sofia to Chicago

What is the typical price of a round-trip flight between Sofia and Chicago?

What is the cheapest month to fly to Chicago?

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

How have Sofia to Chicago flight prices changed over time?

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

What airlines fly to Chicago?

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

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

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

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

When to book flights from Sofia to Chicago

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Sofia to Chicago

Best airlines flying from Sofia to Chicago

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

Traveling to a place near Chicago?

Why use momondo?

An easier way to manage your Chicago 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 the United States

Fly into one of these airports located in Chicago

Airports listed have a maximum distance of 78.5 mi from Chicago

Fly your favorite airline to Chicago

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

Cabin classes currently available on flights to Chicago

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

Popular cities in the United States

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

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