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

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

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.

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

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

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 32% 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 August 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.

$310 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.

8:10 pm - 3:00 pm

ORD

SOF

34h 50m

1 stop

1:05 pm - 9:40 am

SOF

ORD

28h 35m

1 stop

$760Turkish Airlines

Wed, Oct 7 - Sun, Oct 18

9:50 pm - 6:00 pm

ORD

SOF

12h 10m

1 stop

6:45 pm - 7:50 pm

SOF

ORD

33h 05m

1 stop

$768LOT

Sun, Sep 6 - Tue, Sep 22

9:50 pm - 1:55 pm

ORD

SOF

32h 05m

1 stop

6:45 pm - 7:50 pm

SOF

ORD

33h 05m

1 stop

$768LOT

Thu, Sep 3 - Thu, Sep 24

7:05 am - 1:25 pm

ORD

SOF

22h 20m

2 stops

6:25 am - 2:52 pm

SOF

ORD

16h 27m

2 stops

$768Multiple Airlines

Thu, Dec 31 - Thu, Jan 14

1:55 pm - 1:25 pm

ORD

SOF

16h 30m

2 stops

6:25 am - 2:52 pm

SOF

ORD

16h 27m

2 stops

$768Multiple Airlines

Thu, Oct 29 - Thu, Nov 12

8:10 pm - 8:20 pm

ORD

SOF

16h 10m

1 stop

9:35 am - 9:40 am

SOF

ORD

32h 05m

1 stop

$769Turkish Airlines

Sun, Sep 13 - Sat, Oct 10

6:00 pm - 1:15 pm

ORD

SOF

11h 15m

1 stop

6:25 am - 3:20 pm

SOF

ORD

16h 55m

1 stop

$773United Airlines

Wed, Jan 27 - Sun, Jan 31

6:00 pm - 1:15 pm

ORD

SOF

11h 15m

1 stop

6:25 am - 3:20 pm

SOF

ORD

16h 55m

1 stop

$774United Airlines

Wed, Jan 27 - Sun, Jan 31

9:50 pm - 4:20 pm

ORD

SOF

34h 30m

1 stop

5:15 pm - 1:45 pm

SOF

ORD

28h 30m

1 stop

$778British Airways

Sat, Jan 30 - Mon, Feb 15

5:00 pm - 7:20 pm

ORD

SOF

18h 20m

1 stop

5:15 pm - 1:45 pm

SOF

ORD

28h 30m

1 stop

$781British Airways

Sun, Oct 18 - Mon, Nov 2

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British Airways flights from Chicago to Sofia

Our best British Airways deals on Chicago to Sofia flight tickets

British Airways

Sep 13

ORD1:35 pmChicago O'Hare Intl

21h 45m

2 stops

SOF7:20 pmSofia

Nov 9

SOF5:15 pmSofia

31h 42m

2 stops

ORD4:57 pmChicago O'Hare Intl

$798

British Airways

Sep 13

ORD1:35 pmChicago O'Hare Intl

21h 45m

2 stops

SOF7:20 pmSofia

Nov 9

SOF5:15 pmSofia

31h 42m

2 stops

ORD4:57 pmChicago O'Hare Intl

$799

United Airlines flights from Chicago to Sofia

Our best United Airlines deals on Chicago to Sofia flight tickets

United Airlines

Dec 3

ORD9:50 pmChicago O'Hare Intl

17h 05m

1 stop

SOF10:55 pmSofia

Dec 25

SOF2:10 pmSofia

13h 55m

1 stop

ORD8:05 pmChicago O'Hare Intl

$773

United Airlines

Jan 29

ORD6:00 pmChicago O'Hare Intl

11h 15m

1 stop

SOF1:15 pmSofia

Feb 19

SOF6:00 amSofia

16h 10m

1 stop

ORD2:10 pmChicago O'Hare Intl

$776

United Airlines

Dec 6

ORD9:50 pmChicago O'Hare Intl

17h 05m

1 stop

SOF10:55 pmSofia

Dec 29

SOF6:25 amSofia

14h 45m

1 stop

ORD1:10 pmChicago O'Hare Intl

$777

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 10/7

8:10 pm-3:00 pm

1 stop34h 50m

Sofia

Sun 10/18

1:05 pm-9:40 am

1 stop28h 35m

$760

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 9/6

9:50 pm-6:00 pm

1 stop12h 10m

Sofia

Tue 9/22

6:45 pm-7:50 pm

1 stop33h 05m

$768

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 9/3

9:50 pm-1:55 pm

1 stop32h 05m

Sofia

Thu 9/24

6:45 pm-7:50 pm

1 stop33h 05m

$768

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 12/31

7:05 am-1:25 pm

2 stops22h 20m

Sofia

Thu 1/14

6:25 am-2:52 pm

2 stops16h 27m

$768

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 10/29

1:55 pm-1:25 pm

2 stops16h 30m

Sofia

Thu 11/12

6:25 am-2:52 pm

2 stops16h 27m

$768

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 9/13

8:10 pm-8:20 pm

1 stop16h 10m

Sofia

Sat 10/10

9:35 am-9:40 am

1 stop32h 05m

$769

Quickest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 1/27

6:00 pm-1:15 pm

1 stop11h 15m

Sofia

Sun 1/31

6:25 am-3:20 pm

1 stop16h 55m

$773

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 1/27

6:00 pm-1:15 pm

1 stop11h 15m

Sofia

Sun 1/31

6:25 am-3:20 pm

1 stop16h 55m

$774

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 1/30

9:50 pm-4:20 pm

1 stop34h 30m

Sofia

Mon 2/15

5:15 pm-1:45 pm

1 stop28h 30m

$778

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 10/18

5:00 pm-7:20 pm

1 stop18h 20m

Sofia

Mon 11/2

5:15 pm-1:45 pm

1 stop28h 30m

$781

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 $768.

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 August 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	14h 35m
Direct flights	None

The fastest flight from Chicago to Sofia takes 14h 35m

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

Search flight deals

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 14h 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 August 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 28% of all bookings. The subsequent popular airlines are Turkish Airlines at 23%, United Airlines at 17%, and LOT 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 $523	Free Cancellation	Rating 7.4 4,464 reviews	Search Turkish Airlines flights
LOT	PriceFrom $579	Free Cancellation	Rating 7.6 1,212 reviews	Search LOT flights
United Airlines	PriceFrom $583	Free Cancellation	Rating 7.4 10,059 reviews	Search United Airlines flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.5 1,632 reviews	Search Air France flights
SWISS	PriceFrom $594	Free Cancellation	Rating 7.5 2,025 reviews	Search SWISS flights
Lufthansa	PriceFrom $608	Free Cancellation	Rating 6.8 8,177 reviews	Search Lufthansa flights
British Airways	PriceFrom $609	Free Cancellation	Rating 6.7 8,147 reviews	Search British Airways flights
KLM	PriceFrom $614	Free Cancellation	Rating 7.8 1,552 reviews	Search KLM flights
Austrian Airlines	PriceFrom $701	Free Cancellation	Rating 7.6 951 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.