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

Air Serbia and KLM are the most popular carriers operating from Chicago to Sofia

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 07m.

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

Warsaw (WAW) has the shortest average layover time for this route: 1h 37m.

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

Flights via Paris (CDG) offer the lowest average round-trip price of $566.

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

Istanbul (IST) was the most common stop: 38% 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 35% 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.

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 March 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.

$296 Cheap Flights from Chicago to Sofia in 2026

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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.

8:10 pm - 8:15 pm

ORD

SOF

16h 05m

1 stop

9:05 pm - 9:40 am

SOF

ORD

20h 35m

1 stop

$548Turkish Airlines

Mon, Mar 30 - Fri, May 1

8:10 pm - 1:15 pm

ORD

SOF

33h 05m

1 stop

3:50 pm - 9:40 am

SOF

ORD

25h 50m

1 stop

$557Turkish Airlines

Wed, Apr 15 - Wed, Apr 29

11:25 am - 8:45 am

ORD

SOF

13h 20m

1 stop

3:50 pm - 9:40 am

SOF

ORD

25h 50m

1 stop

$562Turkish Airlines

Wed, Apr 22 - Wed, May 6

11:25 am - 8:45 am

ORD

SOF

13h 20m

1 stop

9:35 am - 9:40 am

SOF

ORD

32h 05m

1 stop

$565Turkish Airlines

Mon, May 4 - Thu, May 14

11:25 am - 8:45 am

ORD

SOF

13h 20m

1 stop

2:05 pm - 9:40 am

SOF

ORD

27h 35m

1 stop

$569Turkish Airlines

Mon, Aug 24 - Fri, Sep 18

8:10 pm - 8:15 pm

ORD

SOF

16h 05m

1 stop

3:50 pm - 6:15 pm

SOF

ORD

34h 25m

1 stop

$570Turkish Airlines

Wed, Aug 19 - Wed, Sep 16

1:10 pm - 2:00 pm

MDW

SOF

16h 50m

2 stops

7:00 am - 5:56 pm

SOF

MDW

18h 56m

2 stops

$794KLM

Fri, Apr 3 - Thu, May 7

1:10 pm - 2:00 pm

MDW

SOF

16h 50m

2 stops

7:00 am - 5:54 pm

SOF

MDW

18h 54m

2 stops

$820KLM

Mon, Mar 30 - Mon, Apr 6

1:10 pm - 2:00 pm

MDW

SOF

16h 50m

2 stops

7:00 am - 5:56 pm

SOF

MDW

18h 56m

2 stops

$824KLM

Fri, Apr 3 - Thu, May 7

2:00 pm - 2:00 pm

MDW

SOF

16h 00m

2 stops

7:00 am - 4:27 pm

SOF

MDW

17h 27m

2 stops

$835Multiple Airlines

Mon, Aug 24 - Tue, Sep 8

Turkish Airlines flights from Chicago to Sofia

Our best Turkish Airlines deals on Chicago to Sofia flight tickets

Turkish Airlines

Mar 30

ORD8:10 pmChicago O'Hare Intl

16h 05m

1 stop

SOF8:15 pmSofia

May 1

SOF9:05 pmSofia

20h 35m

1 stop

ORD9:40 amChicago O'Hare Intl

$548

Turkish Airlines

Apr 15

ORD8:10 pmChicago O'Hare Intl

33h 05m

1 stop

SOF1:15 pmSofia

Apr 29

SOF3:50 pmSofia

25h 50m

1 stop

ORD9:40 amChicago O'Hare Intl

$557

Turkish Airlines

Apr 22

ORD11:25 amChicago O'Hare Intl

13h 20m

1 stop

SOF8:45 amSofia

May 6

SOF3:50 pmSofia

25h 50m

1 stop

ORD9:40 amChicago O'Hare Intl

$562

KLM flights from Chicago to Sofia

Our best KLM deals on Chicago to Sofia flight tickets

KLM

Apr 3

MDW1:10 pmChicago Midway

16h 50m

2 stops

SOF2:00 pmSofia

May 7

SOF7:00 amSofia

18h 56m

2 stops

MDW5:56 pmChicago Midway

$794

KLM

Mar 30

MDW1:10 pmChicago Midway

16h 50m

2 stops

SOF2:00 pmSofia

Apr 6

SOF7:00 amSofia

18h 54m

2 stops

MDW5:54 pmChicago Midway

$820

KLM

Apr 3

MDW1:10 pmChicago Midway

16h 50m

2 stops

SOF2:00 pmSofia

May 7

SOF7:00 amSofia

18h 56m

2 stops

MDW5:56 pmChicago Midway

$824

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 3/30

8:10 pm-8:15 pm

1 stop16h 05m

Sofia

Fri 5/1

9:05 pm-9:40 am

1 stop20h 35m

$548

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 4/15

8:10 pm-1:15 pm

1 stop33h 05m

Sofia

Wed 4/29

3:50 pm-9:40 am

1 stop25h 50m

$557

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 4/22

11:25 am-8:45 am

1 stop13h 20m

Sofia

Wed 5/6

3:50 pm-9:40 am

1 stop25h 50m

$562

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 5/4

11:25 am-8:45 am

1 stop13h 20m

Sofia

Thu 5/14

9:35 am-9:40 am

1 stop32h 05m

$565

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 8/24

11:25 am-8:45 am

1 stop13h 20m

Sofia

Fri 9/18

2:05 pm-9:40 am

1 stop27h 35m

$569

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 8/19

8:10 pm-8:15 pm

1 stop16h 05m

Sofia

Wed 9/16

3:50 pm-6:15 pm

1 stop34h 25m

$570

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Fri 4/3

1:10 pm-2:00 pm

2 stops16h 50m

Sofia

Thu 5/7

7:00 am-5:56 pm

2 stops18h 56m

$794

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Mon 3/30

1:10 pm-2:00 pm

2 stops16h 50m

Sofia

Mon 4/6

7:00 am-5:54 pm

2 stops18h 54m

$820

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Fri 4/3

1:10 pm-2:00 pm

2 stops16h 50m

Sofia

Thu 5/7

7:00 am-5:56 pm

2 stops18h 56m

$824

Quickest round-trip

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Mon 8/24

2:00 pm-2:00 pm

2 stops16h 00m

Sofia

Tue 9/8

7:00 am-4:27 pm

2 stops17h 27m

$835

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 $589, 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 $599.

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 $739 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 $709 on momondo.

Can stopping save me money on Chicago to Sofia flights?

You could potentially save up to 18% 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 March 2026, 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

Fastest flight time	12h 35m
Direct flights	None

The fastest flight from Chicago to Sofia takes 12h 35m

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 12h 35m.
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 March 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 26%, LOT at 16%, and United Airlines at 15%.

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
ITA Airways	PriceFrom $469	Free Cancellation	Rating 6.7 1,159 reviews	Search ITA Airways flights
Turkish Airlines	PriceFrom $521	Free Cancellation	Rating 7.3 4,250 reviews	Search Turkish Airlines flights
KLM	PriceFrom $533	Free Cancellation	Rating 7.8 1,467 reviews	Search KLM flights
SWISS	PriceFrom $565	Free Cancellation	Rating 7.6 1,889 reviews	Search SWISS flights
United Airlines	PriceFrom $566	Free Cancellation	Rating 7.4 9,404 reviews	Search United Airlines flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.4 1,542 reviews	Search Air France flights
LOT	PriceFrom $586	Free Cancellation	Rating 7.5 1,183 reviews	Search LOT flights
Lufthansa	PriceFrom $586	Free Cancellation	Rating 6.8 7,833 reviews	Search Lufthansa flights
Austrian Airlines	PriceFrom $587	Free Cancellation	Rating 7.6 900 reviews	Search Austrian Airlines flights
British Airways	PriceFrom $609	Free Cancellation	Rating 6.7 7,778 reviews	Search British Airways flights

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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.