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.

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.

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

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

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 37% 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.

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.

$451 Cheap Flights from Sofia to Chicago in 2026

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Find the cheapest flights from Sofia to Chicago

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 7:21 pm

SOF

ORD

20h 21m

2 stops

2:25 pm - 2:05 pm

ORD

SOF

15h 40m

2 stops

$656KLM

Sat, Jan 24 - Fri, Jan 30

7:00 am - 6:45 pm

SOF

ORD

19h 45m

2 stops

12:15 pm - 2:00 pm

ORD

SOF

17h 45m

2 stops

$657KLM

Thu, Feb 5 - Wed, Apr 1

7:00 am - 6:19 pm

SOF

ORD

19h 19m

2 stops

2:05 pm - 2:05 pm

ORD

SOF

16h 00m

2 stops

$658KLM

Fri, Feb 6 - Thu, Feb 19

6:35 pm - 8:00 pm

SOF

ORD

33h 25m

1 stop

9:50 pm - 1:55 am

ORD

SOF

20h 05m

1 stop

$659LOT

Thu, Feb 5 - Wed, Apr 1

7:00 am - 6:31 pm

SOF

ORD

18h 31m

2 stops

8:15 pm - 2:00 pm

ORD

SOF

33h 45m

1 stop

$661Multiple Airlines

Wed, Mar 18 - Thu, May 28

2:35 pm - 9:00 pm

SOF

ORD

13h 25m

1 stop

10:55 pm - 5:50 pm

ORD

SOF

11h 55m

1 stop

$670LOT

Fri, Mar 13 - Thu, Mar 19

2:35 pm - 8:00 pm

SOF

ORD

13h 25m

1 stop

9:55 pm - 1:50 pm

ORD

SOF

31h 55m

1 stop

$673LOT

Sat, Feb 7 - Thu, Feb 12

5:25 am - 7:50 pm

SOF

ORD

22h 25m

1 stop

5:10 pm - 1:55 am

ORD

SOF

24h 45m

2 stops

$676LOT

Wed, Apr 8 - Wed, Sep 9

5:25 pm - 4:13 pm

SOF

ORD

53h 48m

2 stops

7:05 pm - 7:20 pm

ORD

SOF

16h 15m

1 stop

$683British Airways

Mon, Mar 23 - Sun, Mar 29

7:00 am - 4:16 pm

SOF

MDW

17h 16m

2 stops

1:49 pm - 1:55 pm

MDW

SOF

16h 06m

2 stops

$732Multiple Airlines

Sat, Jan 24 - Fri, Jan 30

United Airlines flights from Sofia to Chicago

Our best United Airlines deals on Sofia to Chicago flight tickets

United Airlines

Feb 26

SOF2:35 pmSofia

13h 30m

1 stop

ORD8:05 pmChicago O'Hare Intl

Mar 5

ORD9:20 amChicago O'Hare Intl

29h 25m

2 stops

SOF10:45 pmSofia

$744

United Airlines

Feb 6

SOF6:10 amSofia

15h 15m

1 stop

ORD1:25 pmChicago O'Hare Intl

Feb 19

ORD6:00 pmChicago O'Hare Intl

20h 45m

1 stop

SOF10:45 pmSofia

$745

United Airlines

Feb 6

SOF6:10 amSofia

17h 10m

1 stop

ORD3:20 pmChicago O'Hare Intl

May 19

ORD6:15 pmChicago O'Hare Intl

20h 35m

1 stop

SOF10:50 pmSofia

$746

LOT flights from Sofia to Chicago

Our best LOT deals on Sofia to Chicago flight tickets

LOT

Apr 8

SOF2:40 pmSofia

13h 10m

1 stop

ORD7:50 pmChicago O'Hare Intl

Sep 9

ORD9:50 pmChicago O'Hare Intl

12h 10m

1 stop

SOF6:00 pmSofia

$659

LOT

Mar 13

SOF2:35 pmSofia

13h 25m

1 stop

ORD9:00 pmChicago O'Hare Intl

Mar 19

ORD10:55 pmChicago O'Hare Intl

11h 55m

1 stop

SOF5:50 pmSofia

$670

LOT

Feb 7

SOF2:35 pmSofia

13h 25m

1 stop

ORD8:00 pmChicago O'Hare Intl

Feb 12

ORD9:55 pmChicago O'Hare Intl

31h 55m

1 stop

SOF1:50 pmSofia

$673

Fly from

Fly to

Route

Depart

Return

Price

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 1/24

7:00 am-7:21 pm

2 stops20h 21m

Chicago O'Hare Intl

Fri 1/30

2:25 pm-2:05 pm

2 stops15h 40m

$656

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 2/5

7:00 am-6:45 pm

2 stops19h 45m

Chicago O'Hare Intl

Wed 4/1

12:15 pm-2:00 pm

2 stops17h 45m

$657

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 2/6

7:00 am-6:19 pm

2 stops19h 19m

Chicago O'Hare Intl

Thu 2/19

2:05 pm-2:05 pm

2 stops16h 00m

$658

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 2/5

6:35 pm-8:00 pm

1 stop33h 25m

Chicago O'Hare Intl

Wed 4/1

9:50 pm-1:55 am

1 stop20h 05m

$659

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 3/18

7:00 am-6:31 pm

2 stops18h 31m

Chicago O'Hare Intl

Thu 5/28

8:15 pm-2:00 pm

1 stop33h 45m

$661

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 3/13

2:35 pm-9:00 pm

1 stop13h 25m

Chicago O'Hare Intl

Thu 3/19

10:55 pm-5:50 pm

1 stop11h 55m

$670

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 2/7

2:35 pm-8:00 pm

1 stop13h 25m

Chicago O'Hare Intl

Thu 2/12

9:55 pm-1:50 pm

1 stop31h 55m

$673

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 am

2 stops24h 45m

$676

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 3/23

5:25 pm-4:13 pm

2 stops53h 48m

Chicago O'Hare Intl

Sun 3/29

7:05 pm-7:20 pm

1 stop16h 15m

$683

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Sat 1/24

7:00 am-4:16 pm

2 stops17h 16m

Chicago Midway

Fri 1/30

1:49 pm-1:55 pm

2 stops16h 06m

$732

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 15m
Direct flights	None

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

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 15m 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 28%, 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 1,171 reviews	Search LOT flights
KLM	PriceFrom $607	Free Cancellation	Rating 7.7 1,439 reviews	Search KLM flights
Turkish Airlines	PriceFrom $625	Free Cancellation	Rating 7.3 4,169 reviews	Search Turkish Airlines flights
Lufthansa	PriceFrom $642	Free Cancellation	Rating 6.8 7,714 reviews	Search Lufthansa flights
United Airlines	PriceFrom $643	Free Cancellation	Rating 7.4 9,159 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $654	Free Cancellation	Rating 7.5 893 reviews	Search Austrian Airlines flights

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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.