What is the cheapest airline that flies from Chicago O'Hare Intl to Sofia?

British Airways, United Airlines, and Lufthansa are the most popular carriers operating from Chicago O'Hare Intl to Sofia

What airlines fly to Sofia?

Turkish Airlines, Lufthansa and LOT are the top three most popular airlines that fly to Sofia from Chicago O'Hare Intl Airport according to our data. Turkish Airlines is the first choice among our users, with 34% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 12 different airlines that fly to Sofia on a routine basis, so you have a few additional options to choose from.

Which airport is the most popular layover for flights between Chicago O'Hare Intl Airport and Sofia?

Istanbul (IST) was the most common stop: 33% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest travel time from Chicago O'Hare Intl Airport to Sofia?

Flights connecting via Vienna (VIE) have the shortest average one-way travel time: 11h 52m.

Which layover airport offers the lowest fares from Chicago O'Hare Intl Airport to Sofia?

Flights via London (LHR) offer the lowest average round-trip price of $641.

Which layover airport has the shortest connection time from Chicago O'Hare Intl Airport to Sofia?

Warsaw (WAW) has the shortest average layover time for this route: 1h 28m.

When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Sofia Airport?

Prices for flights from Chicago O'Hare Intl Airport to Sofia Airport refresh daily.

How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Sofia Airport?

The number of operators available for flights from Chicago O'Hare Intl Airport to Sofia Airport is 12 as of October 2026.

How old do you have to be to fly from Chicago O'Hare Intl Airport to Sofia Airport?

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 Chicago O'Hare Intl Airport to Sofia Airport.

What documentation or ID do you need to fly to Sofia Airport?

The travel and health documents required for your trip to Sofia Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sofia Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$297 Cheap Flights from Chicago O'Hare Intl Airport to Sofia in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Chicago O'Hare Intl Airport to Sofia

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

8:10 pm - 1:10 amORD Chicago O'Hare Intl-SOF Sofia

21h 00m2 stops Lisbon Humberto Delgado Madrid Barajas

5:25 pm - 3:30 pmSOF Sofia-ORD Chicago O'Hare Intl

30h 05m2 stops Madrid Barajas Lisbon Humberto Delgado

$706Multiple Airlines

Fri, Nov 6 - Tue, Nov 17

10:05 am - 12:10 pmORD Chicago O'Hare Intl-SOF Sofia

18h 05m2 stops Toronto Pearson Intl Munich Franz Josef Strauss

6:10 am - 12:55 pmSOF Sofia-ORD Chicago O'Hare Intl

14h 45m2 stops Munich Franz Josef Strauss Frankfurt am Main

$706Multiple Airlines

Wed, Mar 31 - Wed, Apr 14

8:15 pm - 8:50 pmORD Chicago O'Hare Intl-SOF Sofia

16h 35m1 stop Istanbul

9:30 am - 6:20 pmSOF Sofia-ORD Chicago O'Hare Intl

16h 50m1 stop Istanbul

$711Turkish Airlines

Mon, Nov 23 - Mon, Dec 7

12:45 pm - 8:50 pmORD Chicago O'Hare Intl-SOF Sofia

25h 05m1 stop Istanbul

9:40 pm - 11:00 amSOF Sofia-ORD Chicago O'Hare Intl

21h 20m1 stop Istanbul

$711Turkish Airlines

Fri, Oct 30 - Fri, Nov 6

9:50 pm - 11:00 pmORD Chicago O'Hare Intl-SOF Sofia

17h 10m2 stops Munich Franz Josef Strauss Frankfurt am Main

6:25 am - 1:10 pmSOF Sofia-ORD Chicago O'Hare Intl

14h 45m1 stop Frankfurt am Main

$712Lufthansa

Tue, Dec 29 - Tue, Jan 12

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

17h 05m1 stop Munich Franz Josef Strauss

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

31h 20m1 stop Munich Franz Josef Strauss

$713Lufthansa

Mon, Jan 4 - Mon, Jan 18

1:10 pm - 1:15 pmORD Chicago O'Hare Intl-SOF Sofia

16h 05m2 stops Newark Munich Franz Josef Strauss

6:25 am - 6:45 pmSOF Sofia-ORD Chicago O'Hare Intl

19h 20m2 stops Frankfurt am Main Montreal Pierre Elliott Trudeau Intl

$714United Airlines

Tue, Mar 2 - Tue, Mar 16

1:30 pm - 1:15 pmORD Chicago O'Hare Intl-SOF Sofia

15h 45m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

6:25 am - 5:43 pmSOF Sofia-ORD Chicago O'Hare Intl

19h 18m2 stops Frankfurt am Main Toronto Pearson Intl

$719United Airlines

Tue, Mar 2 - Wed, Mar 10

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

32h 00m1 stop Warsaw Frederic Chopin

6:45 pm - 7:50 pmSOF Sofia-ORD Chicago O'Hare Intl

33h 05m1 stop Warsaw Frederic Chopin

$726LOT

Sun, Mar 28 - Sun, Apr 11

10:55 pm - 2:00 amORD Chicago O'Hare Intl-SOF Sofia

19h 05m1 stop Warsaw Frederic Chopin

6:45 pm - 7:50 pmSOF Sofia-ORD Chicago O'Hare Intl

33h 05m1 stop Warsaw Frederic Chopin

$753LOT

Sat, Mar 27 - Sun, Apr 11

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

11:55 am - 10:00 amSOF Sofia-ORD Chicago O'Hare Intl

30h 05m1 stop Istanbul

$828Turkish Airlines

Sun, Oct 4 - Fri, Feb 26

8:10 pm - 3:00 pmORD Chicago O'Hare Intl-SOF Sofia

34h 50m1 stop Istanbul

9:35 am - 6:15 pmSOF Sofia-ORD Chicago O'Hare Intl

16h 40m1 stop Istanbul

$857Turkish Airlines

Thu, Oct 8 - Mon, Oct 12

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

12h 35m1 stop Munich Franz Josef Strauss

6:25 am - 1:10 pmSOF Sofia-ORD Chicago O'Hare Intl

14h 45m1 stop Frankfurt am Main

$891Lufthansa

Sun, Oct 4 - Fri, Feb 26

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

13h 00m1 stop Munich Franz Josef Strauss

6:25 am - 1:10 pmSOF Sofia-ORD Chicago O'Hare Intl

14h 45m1 stop Frankfurt am Main

$897Lufthansa

Sun, Oct 4 - Fri, Feb 26

2:20 pm - 12:55 pmORD Chicago O'Hare Intl-SOF Sofia

14h 35m1 stop Zurich

6:25 am - 3:02 pmSOF Sofia-ORD Chicago O'Hare Intl

16h 37m2 stops Frankfurt am Main Montreal Pierre Elliott Trudeau Intl

$953Multiple Airlines

Fri, Oct 9 - Tue, Nov 10

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

13h 50m2 stops Zurich Munich Franz Josef Strauss

6:25 am - 7:52 pmSOF Sofia-ORD Chicago O'Hare Intl

21h 27m2 stops Frankfurt am Main Montreal Pierre Elliott Trudeau Intl

$968Multiple Airlines

Fri, Oct 9 - Tue, Nov 10

12:55 pm - 6:10 pmORD Chicago O'Hare Intl-SOF Sofia

21h 15m2 stops Washington, D.C. Dulles Intl Vienna Intl

7:55 am - 2:00 pmSOF Sofia-ORD Chicago O'Hare Intl

14h 05m1 stop Vienna Intl

$976Austrian Airlines

Sun, Oct 4 - Fri, Feb 26

4:20 pm - 11:40 amORD Chicago O'Hare Intl-SOF Sofia

11h 20m1 stop Vienna Intl

7:55 am - 5:03 pmSOF Sofia-ORD Chicago O'Hare Intl

17h 08m2 stops Vienna Intl Washington, D.C. Dulles Intl

$981Austrian Airlines

Sun, Oct 4 - Fri, Feb 26

9:00 pm - 8:10 pmORD Chicago O'Hare Intl-SOF Sofia

39h 10m2 stops Philadelphia London Heathrow

5:15 pm - 7:30 pmSOF Sofia-ORD Chicago O'Hare Intl

34h 15m2 stops London Heathrow Newark

$998British Airways

Fri, Oct 9 - Mon, Nov 2

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

12h 10m1 stop Warsaw Frederic Chopin

6:45 pm - 3:10 pmSOF Sofia-ORD Chicago O'Hare Intl

28h 25m1 stop Warsaw Frederic Chopin

$1,005LOT

Fri, Oct 9 - Wed, Oct 14

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Turkish Airlines flights from Chicago O'Hare Intl Airport to Sofia

Our best Turkish Airlines deals on Chicago O'Hare Intl Airport to Sofia flight tickets

Turkish Airlines

Oct 30

ORD12:45 pmChicago O'Hare Intl

25h 05m

1 stop

SOF8:50 pmSofia

Nov 6

SOF9:40 pmSofia

21h 20m

1 stop

ORD11:00 amChicago O'Hare Intl

$711

Turkish Airlines

Oct 12

ORD8:10 pmChicago O'Hare Intl

16h 10m

1 stop

SOF8:20 pmSofia

Oct 22

SOF9:10 pmSofia

20h 30m

1 stop

ORD9:40 amChicago O'Hare Intl

$723

Turkish Airlines

Oct 13

ORD8:10 pmChicago O'Hare Intl

34h 50m

1 stop

SOF3:00 pmSofia

Nov 5

SOF9:30 amSofia

17h 50m

1 stop

ORD7:20 pmChicago O'Hare Intl

$725

Air Serbia flights from Chicago O'Hare Intl Airport to Sofia

Our best Air Serbia deals on Chicago O'Hare Intl Airport to Sofia flight tickets

Air Serbia

Oct 17

ORD11:20 pmChicago O'Hare Intl

32h 10m

1 stop

SOF3:30 pmSofia

May 4

SOF4:00 pmSofia

30h 30m

1 stop

ORD2:30 pmChicago O'Hare Intl

$767

Air Serbia

Oct 14

ORD4:40 pmChicago O'Hare Intl

26h 20m

1 stop

SOF3:00 amSofia

Oct 17

SOF4:00 pmSofia

13h 15m

1 stop

ORD9:15 pmChicago O'Hare Intl

$911

momondo Fare Finder

Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Fri 11/6

8:10 pm-1:10 am

2 stops21h 00m

Sofia

Tue 11/17

5:25 pm-3:30 pm

2 stops30h 05m

$706

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Wed 3/31

10:05 am-12:10 pm

2 stops18h 05m

Sofia

Wed 4/14

6:10 am-12:55 pm

2 stops14h 45m

$706

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Mon 11/23

8:15 pm-8:50 pm

1 stop16h 35m

Sofia

Mon 12/7

9:30 am-6:20 pm

1 stop16h 50m

$711

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Fri 10/30

12:45 pm-8:50 pm

1 stop25h 05m

Sofia

Fri 11/6

9:40 pm-11:00 am

1 stop21h 20m

$711

Quickest round-trip

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Tue 12/29

9:50 pm-11:00 pm

2 stops17h 10m

Sofia

Tue 1/12

6:25 am-1:10 pm

1 stop14h 45m

$712

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Mon 1/4

9:50 pm-10:55 pm

1 stop17h 05m

Sofia

Mon 1/18

7:05 pm-6:25 pm

1 stop31h 20m

$713

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Tue 3/2

1:10 pm-1:15 pm

2 stops16h 05m

Sofia

Tue 3/16

6:25 am-6:45 pm

2 stops19h 20m

$714

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Tue 3/2

1:30 pm-1:15 pm

2 stops15h 45m

Sofia

Wed 3/10

6:25 am-5:43 pm

2 stops19h 18m

$719

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Sun 3/28

9:50 pm-1:50 pm

1 stop32h 00m

Sofia

Sun 4/11

6:45 pm-7:50 pm

1 stop33h 05m

$726

ChicagoSofia

ORD Chicago O'Hare Intl - SOF Sofia

ORDSOF

Chicago O'Hare Intl

Sat 3/27

10:55 pm-2:00 am

1 stop19h 05m

Sofia

Sun 4/11

6:45 pm-7:50 pm

1 stop33h 05m

$753

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 Chicago O'Hare Intl Airport to Sofia

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 Chicago O'Hare Intl Airport and Sofia?

Prices are currently typical for flights on this route.

Typical prices usually range from $623 to $840.
The lowest price recently found on this route was $706.

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Chicago O'Hare Intl Airport is in February. Flight prices, which tend to average around $586, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Sofia from Chicago O'Hare Intl Airport during March instead. Flights to Sofia in March, while not as cheap as those in February, still average around $659.

How far in advance should I book a flight from Chicago O'Hare Intl Airport to Sofia?

You are more likely to see cheaper flights to Sofia from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $808 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from Chicago O'Hare Intl Airport for as low as $747 on momondo.

How have Chicago O'Hare Intl Airport to Sofia flight prices changed over time?

As of October 2026, prices for Chicago O'Hare Intl Airport to Sofia flights are approximately 20% cheaper when compared to flights at the same time last year.

When to book flights from Chicago O'Hare Intl Airport to Sofia

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

Estimated round-trip price

Cheap Chicago O'Hare Intl Airport to Sofia (ORD to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Sofia

Best Price Found	$297
Fastest flight time	11h 15m
Direct flights	None

The best one-way flight to Sofia from Chicago O'Hare Intl Airport in the past 72 hours is $297. The best round-trip flight deal from Chicago O'Hare Intl Airport to Sofia found on momondo in the last 72 hours is $706.

The fastest flight from Chicago O'Hare Intl Airport to Sofia takes 11h 15m

There are no direct flights from Chicago O'Hare Intl Airport to Sofia. There are no popular flight routes from Chicago O'Hare Intl Airport to Sofia.

Search flight deals

Frequently asked questions about flying from Chicago O'Hare Intl Airport to Sofia

How far is Chicago O'Hare Intl to Sofia by plane?
Chicago O'Hare Intl and Sofia are 5191.0 mi apart from one another. In terms of flight time, this usually takes a little over 11h 15m.
When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Sofia Airport?
Prices for flights from Chicago O'Hare Intl Airport to Sofia Airport refresh daily.
How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Sofia Airport?
The number of operators available for flights from Chicago O'Hare Intl Airport to Sofia Airport is 12 as of October 2026.
How old do you have to be to fly from Chicago O'Hare Intl Airport to Sofia Airport?
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 Chicago O'Hare Intl Airport to Sofia Airport.
What documentation or ID do you need to fly to Sofia Airport?
The travel and health documents required for your trip to Sofia Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sofia Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Chicago O'Hare Intl Airport to Sofia?
momondo data reveals that the most frequently booked airline on the route from Chicago O'Hare Intl Airport to Sofia is Turkish Airlines, representing 28% of all bookings. The subsequent popular airlines are Lufthansa at 23%, LOT at 20%, and United Airlines at 12%.

Best airlines flying from Chicago O'Hare Intl Airport to Sofia

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Sofia with momondo

Airline	Rating	Free Cancellation	Price
JetBlue	PriceFrom $451	Free Cancellation	Rating 7.1 3,045 reviews	Search JetBlue flights
Turkish Airlines	PriceFrom $526	Free Cancellation	Rating 7.4 4,458 reviews	Search Turkish Airlines flights
SWISS	PriceFrom $565	Free Cancellation	Rating 7.5 2,089 reviews	Search SWISS flights
British Airways	PriceFrom $573	Free Cancellation	Rating 6.7 8,246 reviews	Search British Airways flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.5 1,649 reviews	Search Air France flights
LOT	PriceFrom $586	Free Cancellation	Rating 7.6 1,194 reviews	Search LOT flights
United Airlines	PriceFrom $604	Free Cancellation	Rating 7.4 10,283 reviews	Search United Airlines flights
Lufthansa	PriceFrom $610	Free Cancellation	Rating 6.8 8,255 reviews	Search Lufthansa flights
KLM	PriceFrom $613	Free Cancellation	Rating 7.8 1,576 reviews	Search KLM flights
Air Serbia	PriceFrom $726	Free Cancellation	Rating 6.1 237 reviews	Search Air Serbia flights

Bansko

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Velingrad

Sandanski

Why use momondo?

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

It is quick and easy to find Chicago to Sofia 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 Sofia that suits you.

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

momondo does allow users to show only those flights to Sofia from Chicago which offer a flexible booking policy as well as other useful filters and features.

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

Once all potential Chicago to Sofia 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 Chicago to Sofia right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Chicago to Sofia flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Turkish Airlines flights from Chicago O'Hare Intl Airport to Sofia

Our best Turkish Airlines deals on Chicago O'Hare Intl Airport to Sofia flight tickets

Air Serbia flights from Chicago O'Hare Intl Airport to Sofia

Our best Air Serbia deals on Chicago O'Hare Intl Airport to Sofia flight tickets

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Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Sofia that are best for you.

See travel insights to Sofia from

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to Sofia

What is the typical price of a round-trip flight between Chicago O'Hare Intl Airport and Sofia?

What is the cheapest month to fly to Sofia?

How far in advance should I book a flight from Chicago O'Hare Intl Airport to Sofia?

How have Chicago O'Hare Intl Airport to Sofia flight prices changed over time?

What is the cheapest airline that flies from Chicago O'Hare Intl to Sofia?

What airlines fly to Sofia?

Which airport is the most popular layover for flights between Chicago O'Hare Intl Airport and Sofia?

Which layover airport offers the lowest fares from Chicago O'Hare Intl Airport to Sofia?

Which layover airport has the shortest travel time from Chicago O'Hare Intl Airport to Sofia?

Which layover airport has the shortest connection time from Chicago O'Hare Intl Airport to Sofia?

When to book flights from Chicago O'Hare Intl Airport to Sofia

Cheap Chicago O'Hare Intl Airport to Sofia (ORD to SOF) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Chicago O'Hare Intl Airport to Sofia

Best airlines flying from Chicago O'Hare Intl Airport to Sofia

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Sofia with momondo

Traveling to a place near Sofia?

Why use momondo?

An easier way to manage your Sofia 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

Fly your favorite airline to Sofia

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Cabin classes currently available on flights to Sofia

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

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