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

Turkish Airlines is the most popular carrier operating from Chicago to Sofia

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

Flights via London (LHR) offer the lowest average round-trip price of $702.

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

Flights connecting via Vienna (VIE) have the shortest average one-way travel time: 11h 56m.

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

Istanbul (IST) was the most common stop: 29% of momondo users choosing 1-stop flights on this route connected there.

What airlines fly to Sofia?

Lufthansa, Turkish Airlines and LOT are the top three most popular airlines that fly to Sofia from Chicago according to our data. Lufthansa is the first choice among our users, with 33% 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 layover airport has the shortest connection time from Chicago to Sofia?

Warsaw (WAW) has the shortest average layover time for this route: 1h 21m.

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

Prices for flights from Chicago to Sofia Airport were last updated today.

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

As of July 2026, there are 12 operators available to choose from for flights from Chicago to Sofia Airport.

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

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 Chicago 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.

$316 Cheap Flights from Chicago to Sofia in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Chicago to Sofia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:25 am - 3:00 pm

ORD

SOF

19h 35m

1 stop

1:05 pm - 9:40 am

SOF

ORD

28h 35m

1 stop

$767Turkish Airlines

Fri, Sep 25 - Sun, Oct 4

8:10 pm - 8:45 am

ORD

SOF

28h 35m

1 stop

9:10 pm - 9:40 am

SOF

ORD

20h 30m

1 stop

$767Turkish Airlines

Thu, Sep 24 - Sun, Oct 4

9:05 pm - 1:25 pm

ORD

SOF

33h 20m

2 stops

6:25 am - 1:10 pm

SOF

ORD

14h 45m

1 stop

$769Multiple Airlines

Sat, Oct 31 - Sat, Nov 14

3:45 pm - 2:15 pm

ORD

SOF

38h 30m

2 stops

6:25 am - 6:21 pm

SOF

ORD

19h 56m

2 stops

$770Multiple Airlines

Sat, Nov 28 - Sat, Dec 12

1:31 pm - 4:20 pm

ORD

SOF

18h 49m

2 stops

7:45 pm - 4:49 pm

SOF

ORD

29h 04m

2 stops

$773British Airways

Sun, Jan 24 - Sun, Feb 7

8:59 pm - 6:35 pm

ORD

SOF

37h 36m

2 stops

9:05 pm - 1:45 pm

SOF

ORD

24h 40m

1 stop

$774British Airways

Fri, Jan 8 - Wed, Jan 13

4:20 pm - 11:40 am

ORD

SOF

11h 20m

1 stop

6:45 pm - 6:55 pm

SOF

ORD

32h 10m

2 stops

$776Austrian Airlines

Mon, Sep 14 - Mon, Nov 9

6:00 pm - 10:45 pm

ORD

SOF

20h 45m

1 stop

6:00 am - 2:10 pm

SOF

ORD

16h 10m

1 stop

$781United Airlines

Sun, Dec 27 - Sun, Jan 10

6:00 pm - 6:20 pm

ORD

SOF

16h 20m

1 stop

6:25 am - 6:27 pm

SOF

ORD

20h 02m

2 stops

$782United Airlines

Fri, Jan 22 - Fri, Feb 5

12:56 pm - 11:40 am

ORD

SOF

14h 44m

2 stops

8:00 am - 6:37 pm

SOF

ORD

18h 37m

2 stops

$913Austrian Airlines

Mon, Aug 24 - Mon, Aug 31

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British Airways flights from Chicago to Sofia

Our best British Airways deals on Chicago to Sofia flight tickets

British Airways

Jan 24

ORD1:31 pmChicago O'Hare Intl

18h 49m

2 stops

SOF4:20 pmSofia

Feb 7

SOF7:45 pmSofia

29h 04m

2 stops

ORD4:49 pmChicago O'Hare Intl

$773

British Airways

Jan 8

ORD8:59 pmChicago O'Hare Intl

37h 36m

2 stops

SOF6:35 pmSofia

Jan 13

SOF9:05 pmSofia

24h 40m

1 stop

ORD1:45 pmChicago O'Hare Intl

$774

British Airways

Sep 13

ORD5:00 pmChicago O'Hare Intl

18h 20m

1 stop

SOF7:20 pmSofia

Nov 9

SOF5:15 pmSofia

31h 42m

2 stops

ORD4:57 pmChicago O'Hare Intl

$791

LOT flights from Chicago to Sofia

Our best LOT deals on Chicago to Sofia flight tickets

LOT

Oct 4

ORD9:50 pmChicago O'Hare Intl

12h 10m

1 stop

SOF6:00 pmSofia

Feb 24

SOF6:35 pmSofia

33h 20m

1 stop

ORD7:55 pmChicago O'Hare Intl

$788

LOT

Sep 3

ORD9:50 pmChicago O'Hare Intl

32h 05m

1 stop

SOF1:55 pmSofia

Sep 24

SOF6:45 pmSofia

33h 05m

1 stop

ORD7:50 pmChicago O'Hare Intl

$790

LOT

Aug 26

ORD9:50 pmChicago O'Hare Intl

20h 05m

1 stop

SOF1:55 amSofia

Oct 10

SOF6:45 pmSofia

28h 25m

1 stop

ORD3:10 pmChicago O'Hare Intl

$792

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 9/25

11:25 am-3:00 pm

1 stop19h 35m

Sofia

Sun 10/4

1:05 pm-9:40 am

1 stop28h 35m

$767

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 9/24

8:10 pm-8:45 am

1 stop28h 35m

Sofia

Sun 10/4

9:10 pm-9:40 am

1 stop20h 30m

$767

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 10/31

9:05 pm-1:25 pm

2 stops33h 20m

Sofia

Sat 11/14

6:25 am-1:10 pm

1 stop14h 45m

$769

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 11/28

3:45 pm-2:15 pm

2 stops38h 30m

Sofia

Sat 12/12

6:25 am-6:21 pm

2 stops19h 56m

$770

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 1/24

1:31 pm-4:20 pm

2 stops18h 49m

Sofia

Sun 2/7

7:45 pm-4:49 pm

2 stops29h 04m

$773

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 1/8

8:59 pm-6:35 pm

2 stops37h 36m

Sofia

Wed 1/13

9:05 pm-1:45 pm

1 stop24h 40m

$774

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 9/14

4:20 pm-11:40 am

1 stop11h 20m

Sofia

Mon 11/9

6:45 pm-6:55 pm

2 stops32h 10m

$776

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 12/27

6:00 pm-10:45 pm

1 stop20h 45m

Sofia

Sun 1/10

6:00 am-2:10 pm

1 stop16h 10m

$781

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 1/22

6:00 pm-6:20 pm

1 stop16h 20m

Sofia

Fri 2/5

6:25 am-6:27 pm

2 stops20h 02m

$782

Quickest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 8/24

12:56 pm-11:40 am

2 stops14h 44m

Sofia

Mon 8/31

8:00 am-6:37 pm

2 stops18h 37m

$913

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 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 and Sofia?

Prices are currently typical for flights on this route.

Typical prices usually range from $686 to $899.
The lowest price recently found on this route was $767.

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Chicago is in February. Flight prices, which tend to average around $593, 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 during January instead. Flights to Sofia in January, while not as cheap as those in February, still average around $608.

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

You are more likely to see cheaper flights to Sofia from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $783 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from Chicago for as low as $734 on momondo.

Can stopping save me money on Chicago to Sofia flights?

You could potentially save up to 25% on your flight if you consider stops on a Chicago to Sofia flight.

How have Chicago to Sofia flight prices changed over time?

As of July 2026, prices for Chicago to Sofia flights are approximately 15% cheaper when compared to flights at the same time last year.

When to book flights from Chicago to Sofia

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

Estimated round-trip price

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

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

Fastest flight time	16h 00m
Direct flights	None

The fastest flight from Chicago to Sofia takes 16h 00m

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

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Frequently asked questions about flying from Chicago to Sofia

How far is Chicago to Sofia by plane?
A flight from Chicago to Sofia will travel around 5185.9 mi. A reasonable flight in good conditions will take 16h 00m.
When did momondo last update prices for flights from Chicago to Sofia Airport?
Prices for flights from Chicago to Sofia Airport were last updated today.
How many operators does momondo search for flights from Chicago to Sofia Airport?
As of July 2026, there are 12 operators available to choose from for flights from Chicago to Sofia Airport.
How old do you have to be to fly from Chicago to Sofia Airport?
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 Chicago 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 to Sofia?
momondo data reveals that the most frequently booked airline on the route from Chicago to Sofia is Lufthansa, representing 29% of all bookings. The subsequent popular airlines are Turkish Airlines at 22%, United Airlines at 17%, and LOT at 12%.

Best airlines flying from Chicago to Sofia

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

Airline	Rating	Free Cancellation	Price
Turkish Airlines	PriceFrom $520	Free Cancellation	Rating 7.4 4,455 reviews	Search Turkish Airlines flights
LOT	PriceFrom $578	Free Cancellation	Rating 7.6 1,212 reviews	Search LOT flights
United Airlines	PriceFrom $580	Free Cancellation	Rating 7.4 10,052 reviews	Search United Airlines flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.5 1,629 reviews	Search Air France flights
SWISS	PriceFrom $594	Free Cancellation	Rating 7.5 2,019 reviews	Search SWISS flights
Lufthansa	PriceFrom $608	Free Cancellation	Rating 6.8 8,163 reviews	Search Lufthansa flights
British Airways	PriceFrom $609	Free Cancellation	Rating 6.7 8,129 reviews	Search British Airways flights
KLM	PriceFrom $614	Free Cancellation	Rating 7.8 1,550 reviews	Search KLM flights
Austrian Airlines	PriceFrom $646	Free Cancellation	Rating 7.6 950 reviews	Search Austrian Airlines flights
Air Serbia	PriceFrom $703	Free Cancellation	Rating 6.2 233 reviews	Search Air Serbia flights

Bansko

Borovets

Velingrad

Sandanski

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Chicago to Sofia. momondo saves you time and could save you money on your trip.

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?

momondo helps you find the best flight between Chicago and Sofia 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 Chicago to Sofia right now. Can momondo alert me if prices change?

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

An easier way to manage your Sofia trip

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Cheap flights from Chicago to Sofia from $316

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Sofia departing on 8/31. 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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British Airways flights from Chicago to Sofia

Our best British Airways deals on Chicago to Sofia flight tickets

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Our best LOT deals on Chicago to Sofia flight tickets

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How to get the cheapest flight ticket from Chicago to Sofia

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

What is the cheapest month to fly to Sofia?

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

Can stopping save me money on Chicago to Sofia flights?

How have Chicago to Sofia flight prices changed over time?

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

What airlines fly to Sofia?

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

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

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

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

When to book flights from Chicago to Sofia

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

Fastest flight time

Direct flights

Frequently asked questions about flying from Chicago to Sofia

Best airlines flying from Chicago to Sofia

Compare and see reviews for airlines that fly from Chicago 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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List of cabin classes available on flights landing in Sofia. Availability may vary depending on flight origin and airline.

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