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

Istanbul (IST) was the most common stop: 36% of momondo users choosing 1-stop flights on this route connected there.

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

Warsaw (WAW) has the shortest average layover time for this route: 1h 49m.

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.

What airlines fly to Sofia?

Turkish Airlines, Lufthansa and LOT are the top three most popular airlines that fly to Sofia from Chicago according to our data. Turkish Airlines is the first choice among our users, with 31% 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.

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

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

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 September 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.

$328 Cheap Flights from Chicago to Sofia in 2025/26

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Find the cheapest flights from Chicago to Sofia

Round-trip

One-way

Last minute

Cheap round-trip flights

6:50 pm - 6:20 pmORD-SOF

15h 30m2 stops

6:10 am - 8:00 pmSOF-ORD

21h 50m2 stops

$545

Find Deal

mié., nov. 5 - mié., nov. 19

11:50 am - 3:10 pmORD-SOF

19h 20m1 stop

4:00 pm - 6:25 pmSOF-ORD

34h 25m1 stop

$546Turkish Airlines

Find Deal

jue., nov. 20 - dom., nov. 23

9:55 pm - 5:50 pmORD-SOF

35h 55m2 stops

6:35 pm - 8:00 pmSOF-ORD

33h 25m1 stop

$547LOT

Find Deal

dom., nov. 16 - jue., ene. 15

9:50 pm - 6:20 pmORD-SOF

12h 30m1 stop

6:10 am - 2:55 pmSOF-ORD

16h 45m2 stops

$551United Airlines

Find Deal

dom., nov. 2 - mié., nov. 19

4:00 pm - 6:20 pmORD-SOF

18h 20m2 stops

6:00 am - 8:00 pmSOF-ORD

22h 00m2 stops

$555United Airlines

Find Deal

mar., nov. 4 - jue., nov. 20

9:55 pm - 1:50 pmORD-SOF

31h 55m1 stop

2:35 pm - 8:00 pmSOF-ORD

13h 25m1 stop

$557LOT

Find Deal

vie., nov. 7 - sáb., nov. 22

9:50 pm - 6:20 pmORD-SOF

12h 30m1 stop

6:10 am - 1:10 pmSOF-ORD

15h 00m1 stop

$565Lufthansa

Find Deal

dom., nov. 2 - dom., nov. 16

10:35 pm - 10:45 pmORD-SOF

16h 10m2 stops

7:05 pm - 1:10 pmSOF-ORD

26h 05m2 stops

$604Lufthansa

Find Deal

dom., dic. 28 - lun., mar. 2

1:50 pm - 2:05 pmMDW-SOF

16h 15m2 stops

7:00 am - 6:08 pmSOF-MDW

19h 08m2 stops

$875KLM

Find Deal

lun., dic. 15 - jue., ene. 8

9:35 am - 2:00 pmMDW-SOF

20h 25m2 stops

7:00 am - 6:25 pmSOF-MDW

19h 25m2 stops

$882KLM

Find Deal

jue., oct. 16 - lun., oct. 20

Turkish Airlines flights from Chicago to Sofia

Our best Turkish Airlines deals on Chicago to Sofia flight tickets

Turkish Airlines

Nov 20

ORD11:50 amChicago O'Hare Intl

19h 20m

1 stop

SOF3:10 pmSofia

Nov 23

SOF4:00 pmSofia

34h 25m

1 stop

ORD6:25 pmChicago O'Hare Intl

$546

Find similar

Turkish Airlines

Nov 2

ORD8:20 pmChicago O'Hare Intl

34h 50m

1 stop

SOF3:10 pmSofia

Nov 16

SOF4:00 pmSofia

26h 05m

1 stop

ORD10:05 amChicago O'Hare Intl

$564

Find similar

LOT flights from Chicago to Sofia

Our best LOT deals on Chicago to Sofia flight tickets

LOT

Nov 16

ORD9:55 pmChicago O'Hare Intl

35h 55m

2 stops

SOF5:50 pmSofia

Jan 15

SOF6:35 pmSofia

33h 25m

1 stop

ORD8:00 pmChicago O'Hare Intl

$547

Find similar

LOT

Nov 7

ORD9:55 pmChicago O'Hare Intl

31h 55m

1 stop

SOF1:50 pmSofia

Nov 22

SOF2:35 pmSofia

13h 25m

1 stop

ORD8:00 pmChicago O'Hare Intl

$557

Find similar

LOT

Oct 5

ORD9:40 pmChicago O'Hare Intl

12h 15m

1 stop

SOF5:55 pmSofia

Nov 3

SOF6:35 pmSofia

33h 25m

1 stop

ORD8:00 pmChicago O'Hare Intl

$561

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

mié. 11/5

6:50 pm-6:20 pm

2 stops15h 30m

Sofia

mié. 11/19

6:10 am-8:00 pm

2 stops21h 50m

$545

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

jue. 11/20

11:50 am-3:10 pm

1 stop19h 20m

Sofia

dom. 11/23

4:00 pm-6:25 pm

1 stop34h 25m

$546

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

dom. 11/16

9:55 pm-5:50 pm

2 stops35h 55m

Sofia

jue. 1/15

6:35 pm-8:00 pm

1 stop33h 25m

$547

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

dom. 11/2

9:50 pm-6:20 pm

1 stop12h 30m

Sofia

mié. 11/19

6:10 am-2:55 pm

2 stops16h 45m

$551

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

mar. 11/4

4:00 pm-6:20 pm

2 stops18h 20m

Sofia

jue. 11/20

6:00 am-8:00 pm

2 stops22h 00m

$555

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

vie. 11/7

9:55 pm-1:50 pm

1 stop31h 55m

Sofia

sáb. 11/22

2:35 pm-8:00 pm

1 stop13h 25m

$557

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

dom. 11/2

9:50 pm-6:20 pm

1 stop12h 30m

Sofia

dom. 11/16

6:10 am-1:10 pm

1 stop15h 00m

$565

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

dom. 12/28

10:35 pm-10:45 pm

2 stops16h 10m

Sofia

lun. 3/2

7:05 pm-1:10 pm

2 stops26h 05m

$604

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

lun. 12/15

1:50 pm-2:05 pm

2 stops16h 15m

Sofia

jue. 1/8

7:00 am-6:08 pm

2 stops19h 08m

$875

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

jue. 10/16

9:35 am-2:00 pm

2 stops20h 25m

Sofia

lun. 10/20

7:00 am-6:25 pm

2 stops19h 25m

$882

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 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 $559, 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 $766 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 $737 on momondo.

Can stopping save me money on Chicago to Sofia flights?

You could potentially save up to 46% 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 September 2025, prices for Chicago to Sofia flights are approximately 18% 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

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 15m.
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 September 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 18%, 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 $497	Free Cancellation	Rating 7.3 3,968 reviews	Search Turkish Airlines flights
Air France	PriceFrom $498	Free Cancellation	Rating 7.4 1,469 reviews	Search Air France flights
KLM	PriceFrom $533	Free Cancellation	Rating 7.8 1,385 reviews	Search KLM flights
LOT	PriceFrom $569	Free Cancellation	Rating 7.6 1,114 reviews	Search LOT flights
Lufthansa	PriceFrom $589	Free Cancellation	Rating 6.8 7,407 reviews	Search Lufthansa flights
SWISS	PriceFrom $596	Free Cancellation	Rating 7.5 1,730 reviews	Search SWISS flights
United Airlines	PriceFrom $601	Free Cancellation	Rating 7.4 8,929 reviews	Search United Airlines flights
British Airways	PriceFrom $613	Free Cancellation	Rating 6.6 7,361 reviews	Search British Airways flights
Austrian Airlines	PriceFrom $613	Free Cancellation	Rating 7.6 850 reviews	Search Austrian Airlines flights
Air Serbia	PriceFrom $652	Free Cancellation	Rating 6.2 200 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.

Start using Trips

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Cheap flights from Chicago to Sofia from $328

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 9/22. 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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Filter for what you want

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Turkish Airlines flights from Chicago to Sofia

Our best Turkish Airlines deals on Chicago to Sofia flight tickets

LOT flights from Chicago to Sofia

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

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 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 46% 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 September 2025, prices for Chicago to Sofia flights are approximately 18% cheaper 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 France 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: 36% 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 49m.

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