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

Istanbul (IST) was the most common stop: 34% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Paris (CDG) offer the lowest average round-trip price of $706.

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

Air Serbia, Lufthansa, and Air Canada are the most popular carriers operating from Chicago to Sofia

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

Warsaw (WAW) has the shortest average layover time for this route: 1h 48m.

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: 12h 03m.

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 32% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 10 different airlines that fly to Sofia on a routine basis, so you have a few additional options to choose from.

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 October 2025, there are 10 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.

$353 Cheap Flights from Chicago to Sofia in 2025/26

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

Prices are currently low for flights on this route. Typical prices usually range from $555 to $693. The lowest price recently found on this route was $539.

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1:25 pm - 2:05 pmORD-SOF

16h 40m2 stops

7:00 am - 2:20 pmSOF-ORD

15h 20m1 stop

$539KLM

Find Deal

Fri, Nov 14 - Sun, Nov 23

11:50 am - 8:50 pmORD-SOF

25h 00m1 stop

4:00 pm - 11:05 amSOF-ORD

26h 05m1 stop

$540Turkish Airlines

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Tue, Nov 18 - Mon, Mar 16

9:50 pm - 6:20 pmORD-SOF

12h 30m1 stop

6:05 am - 1:10 pmSOF-ORD

15h 05m2 stops

$541Lufthansa

Find Deal

Wed, Nov 5 - Wed, Nov 19

2:35 pm - 1:55 pmORD-SOF

15h 20m2 stops

7:00 am - 4:24 pmSOF-ORD

17h 24m2 stops

$543Multiple Airlines

Find Deal

Sat, Nov 15 - Sun, Nov 23

1:00 pm - 6:00 pmORD-SOF

21h 00m2 stops

6:45 pm - 2:00 pmSOF-ORD

27h 15m1 stop

$545Austrian Airlines

Find Deal

Wed, Nov 5 - Thu, Nov 20

4:20 pm - 1:50 pmORD-SOF

13h 30m1 stop

2:25 pm - 8:05 pmSOF-ORD

13h 40m1 stop

$547Lufthansa

Find Deal

Wed, Nov 5 - Wed, Nov 19

6:50 pm - 3:15 pmORD-SOF

12h 25m1 stop

4:00 pm - 4:20 pmSOF-ORD

32h 20m1 stop

$564SWISS

Find Deal

Wed, Nov 12 - Thu, Nov 20

9:50 pm - 10:45 pmORD-SOF

16h 55m1 stop

6:00 am - 6:45 pmSOF-ORD

20h 45m2 stops

$577United Airlines

Find Deal

Wed, Nov 12 - Tue, Nov 25

6:20 pm - 6:20 pmORD-SOF

16h 00m2 stops

6:00 am - 2:55 pmSOF-ORD

16h 55m2 stops

$582United Airlines

Find Deal

Wed, Nov 5 - Thu, Nov 20

6:50 pm - 3:15 pmORD-SOF

12h 25m1 stop

1:45 pm - 4:20 pmSOF-ORD

34h 35m2 stops

$586SWISS

Find Deal

Wed, Nov 5 - Mon, Nov 17

Turkish Airlines flights from Chicago to Sofia

Our best Turkish Airlines deals on Chicago to Sofia flight tickets

Turkish Airlines

Nov 18

ORD11:50 amChicago O'Hare Intl

25h 00m

1 stop

SOF8:50 pmSofia

Mar 16

SOF4:00 pmSofia

26h 05m

1 stop

ORD11:05 amChicago O'Hare Intl

$540

Find similar

Turkish Airlines

Nov 13

ORD11:50 amChicago O'Hare Intl

12h 55m

1 stop

SOF8:45 amSofia

Nov 20

SOF9:35 amSofia

16h 50m

1 stop

ORD6:25 pmChicago O'Hare Intl

$557

Find similar

Turkish Airlines

Nov 6

ORD11:50 amChicago O'Hare Intl

19h 20m

1 stop

SOF3:10 pmSofia

Nov 15

SOF4:00 pmSofia

34h 25m

1 stop

ORD6:25 pmChicago O'Hare Intl

$559

Find similar

KLM flights from Chicago to Sofia

Our best KLM deals on Chicago to Sofia flight tickets

KLM

Nov 14

ORD1:25 pmChicago O'Hare Intl

16h 40m

2 stops

SOF2:05 pmSofia

Nov 23

SOF7:00 amSofia

15h 20m

1 stop

ORD2:20 pmChicago O'Hare Intl

$539

Find similar

KLM

Nov 14

ORD1:25 pmChicago O'Hare Intl

16h 40m

2 stops

SOF2:05 pmSofia

Nov 23

SOF7:00 amSofia

17h 52m

2 stops

ORD4:52 pmChicago O'Hare Intl

$549

Find similar

KLM

Jan 6

ORD1:35 pmChicago O'Hare Intl

16h 30m

2 stops

SOF2:05 pmSofia

Feb 5

SOF7:00 amSofia

17h 37m

2 stops

ORD4:37 pmChicago O'Hare Intl

$574

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 11/14

1:25 pm-2:05 pm

2 stops16h 40m

Sofia

Sun 11/23

7:00 am-2:20 pm

1 stop15h 20m

$539

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 11/18

11:50 am-8:50 pm

1 stop25h 00m

Sofia

Mon 3/16

4:00 pm-11:05 am

1 stop26h 05m

$540

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 11/5

9:50 pm-6:20 pm

1 stop12h 30m

Sofia

Wed 11/19

6:05 am-1:10 pm

2 stops15h 05m

$541

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 11/15

2:35 pm-1:55 pm

2 stops15h 20m

Sofia

Sun 11/23

7:00 am-4:24 pm

2 stops17h 24m

$543

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 11/5

1:00 pm-6:00 pm

2 stops21h 00m

Sofia

Thu 11/20

6:45 pm-2:00 pm

1 stop27h 15m

$545

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 11/5

4:20 pm-1:50 pm

1 stop13h 30m

Sofia

Wed 11/19

2:25 pm-8:05 pm

1 stop13h 40m

$547

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 11/12

6:50 pm-3:15 pm

1 stop12h 25m

Sofia

Thu 11/20

4:00 pm-4:20 pm

1 stop32h 20m

$564

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 11/12

9:50 pm-10:45 pm

1 stop16h 55m

Sofia

Tue 11/25

6:00 am-6:45 pm

2 stops20h 45m

$577

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 11/5

6:20 pm-6:20 pm

2 stops16h 00m

Sofia

Thu 11/20

6:00 am-2:55 pm

2 stops16h 55m

$582

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 11/5

6:50 pm-3:15 pm

1 stop12h 25m

Sofia

Mon 11/17

1:45 pm-4:20 pm

2 stops34h 35m

$586

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?

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 $568, 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 March instead. Flights to Sofia in March, while not as cheap as those in February, still average around $588.

What is the cheapest day to depart on your flight to Sofia?

According to our data, Thursday is the cheapest day to fly to Sofia from Chicago. The lowest ticket price found for a Thursday departure recently was $871. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Chicago to Sofia on a Saturday will generally be more expensive and average around $1,039. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Sofia?

In the morning is the cheapest time of day to fly from Chicago to Sofia when you can find flight prices for as low as $801. Flying to Sofia in the morning is an ideal time because this is during off-peak travel hours. At noon is when there is more demand to fly to Sofia, so prices are often more expensive at around $1,145 per ticket.

How far in advance should I book a flight 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 $768 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 $736 on momondo.

Can stopping save me money on Chicago to Sofia flights?

You could potentially save up to 50% 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 October 2025, prices for Chicago to Sofia flights are approximately 1% more expensive 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

Direct flights	None

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

Search flight deals

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 11h 30m.
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 October 2025, there are 10 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 Turkish Airlines, representing 28% of all bookings. The subsequent popular airlines are Lufthansa at 25%, LOT at 17%, and United Airlines at 14%.

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 $511	Free Cancellation	Rating 7.3 4,010 reviews	Search Turkish Airlines flights
KLM	PriceFrom $533	Free Cancellation	Rating 7.7 1,404 reviews	Search KLM flights
LOT	PriceFrom $584	Free Cancellation	Rating 7.6 1,133 reviews	Search LOT flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.4 1,476 reviews	Search Air France flights
Lufthansa	PriceFrom $589	Free Cancellation	Rating 6.8 7,497 reviews	Search Lufthansa flights
SWISS	PriceFrom $594	Free Cancellation	Rating 7.5 1,772 reviews	Search SWISS flights
United Airlines	PriceFrom $601	Free Cancellation	Rating 7.4 8,982 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $606	Free Cancellation	Rating 7.6 855 reviews	Search Austrian Airlines flights
British Airways	PriceFrom $613	Free Cancellation	Rating 6.7 7,457 reviews	Search British Airways flights
Air Serbia	PriceFrom $634	Free Cancellation	Rating 6.2 203 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

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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Cheap flights from Chicago to Sofia from $353

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 12/27. 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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Turkish Airlines flights from Chicago to Sofia

Our best Turkish Airlines deals on Chicago to Sofia flight tickets

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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

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

What is the cheapest month to fly to Sofia?

What is the cheapest day to depart on your flight to Sofia?

What is the cheapest time of day to depart on your flight to Sofia?

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

Can stopping save me money on Chicago to Sofia flights?

You could potentially save up to 50% 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 October 2025, prices for Chicago to Sofia flights are approximately 1% more expensive when compared to flights at the same time last year.

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

Air Serbia, Lufthansa, and Air Canada are the most popular carriers operating from Chicago to Sofia

What airlines fly to Sofia?

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

Istanbul (IST) was the most common stop: 34% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Paris (CDG) offer the lowest average round-trip price of $706.

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: 12h 03m.

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

Warsaw (WAW) has the shortest average layover time for this route: 1h 48m.

When to book flights from Chicago to Sofia

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

Direct flights

How far is Chicago to Sofia by plane?

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

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

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

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

What is the most popular airline 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?

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

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

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

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

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

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