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

Flights via Zurich (ZRH) offer the lowest average round-trip price of $662.

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 19m.

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

Rome (FCO) has the shortest average layover time for this route: 1h 35m.

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

Istanbul (IST) was the most common stop: 39% of momondo users choosing 1-stop flights on this route connected there.

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 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.

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

British Airways, Air France, and KLM 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 May 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.

$332 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.

9:40 pm - 11:15 pm

ORD

SOF

17h 35m

1 stop

6:30 am - 8:12 pm

SOF

ORD

21h 42m

2 stops

$851Multiple Airlines

Thu, Sep 10 - Thu, Sep 24

11:25 am - 8:15 pm

ORD

SOF

24h 50m

1 stop

9:05 pm - 9:40 am

SOF

ORD

20h 35m

1 stop

$852Turkish Airlines

Fri, Jul 31 - Tue, Sep 8

5:10 pm - 1:50 pm

ORD

SOF

12h 40m

1 stop

2:35 pm - 3:10 pm

SOF

ORD

32h 35m

1 stop

$853LOT

Mon, Aug 3 - Sat, Oct 3

9:40 pm - 12:10 pm

ORD

SOF

30h 30m

2 stops

6:10 am - 6:15 pm

SOF

ORD

20h 05m

1 stop

$854United Airlines

Sat, Aug 1 - Tue, Sep 8

12:55 pm - 6:10 pm

ORD

SOF

21h 15m

2 stops

8:00 am - 5:00 pm

SOF

ORD

17h 00m

2 stops

$855Austrian Airlines

Sun, Sep 6 - Tue, Sep 22

9:40 pm - 11:15 pm

ORD

SOF

17h 35m

1 stop

7:00 pm - 12:55 pm

SOF

ORD

25h 55m

1 stop

$856Lufthansa

Mon, Jul 27 - Wed, Aug 12

8:10 pm - 8:45 am

ORD

SOF

28h 35m

1 stop

2:05 pm - 9:40 am

SOF

ORD

27h 35m

1 stop

$857Turkish Airlines

Thu, Jul 30 - Fri, Sep 18

5:10 pm - 1:55 am

ORD

SOF

24h 45m

2 stops

6:45 pm - 7:50 pm

SOF

ORD

33h 05m

1 stop

$858LOT

Thu, Aug 13 - Sun, Aug 30

7:05 pm - 12:55 pm

ORD

SOF

33h 50m

1 stop

6:20 am - 8:12 pm

SOF

ORD

21h 52m

2 stops

$859Multiple Airlines

Thu, Jul 30 - Fri, Sep 18

9:22 pm - 12:10 pm

ORD

SOF

30h 48m

2 stops

1:40 pm - 1:20 pm

SOF

ORD

31h 40m

1 stop

$860Multiple Airlines

Sat, Aug 15 - Mon, Aug 31

Lufthansa flights from Chicago to Sofia

Our best Lufthansa deals on Chicago to Sofia flight tickets

Lufthansa

Jul 27

ORD9:40 pmChicago O'Hare Intl

17h 35m

1 stop

SOF11:15 pmSofia

Aug 12

SOF7:00 pmSofia

25h 55m

1 stop

ORD12:55 pmChicago O'Hare Intl

$856

Lufthansa

Jul 28

ORD9:40 pmChicago O'Hare Intl

17h 35m

1 stop

SOF11:15 pmSofia

Aug 28

SOF6:10 amSofia

14h 25m

1 stop

ORD12:35 pmChicago O'Hare Intl

$862

Lufthansa

Jul 28

ORD10:30 pmChicago O'Hare Intl

16h 45m

2 stops

SOF11:15 pmSofia

Aug 18

SOF7:25 pmSofia

25h 10m

1 stop

ORD12:35 pmChicago O'Hare Intl

$872

LOT flights from Chicago to Sofia

Our best LOT deals on Chicago to Sofia flight tickets

LOT

Aug 3

ORD5:10 pmChicago O'Hare Intl

12h 40m

1 stop

SOF1:50 pmSofia

Oct 3

SOF2:35 pmSofia

32h 35m

1 stop

ORD3:10 pmChicago O'Hare Intl

$853

LOT

Aug 13

ORD5:10 pmChicago O'Hare Intl

24h 45m

2 stops

SOF1:55 amSofia

Aug 26

SOF5:25 amSofia

22h 25m

1 stop

ORD7:50 pmChicago O'Hare Intl

$858

LOT

Aug 9

ORD5:10 pmChicago O'Hare Intl

36h 40m

2 stops

SOF1:50 pmSofia

Aug 31

SOF2:35 pmSofia

13h 15m

1 stop

ORD7:50 pmChicago O'Hare Intl

$863

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 9/10

9:40 pm-11:15 pm

1 stop17h 35m

Sofia

Thu 9/24

6:30 am-8:12 pm

2 stops21h 42m

$851

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 7/31

11:25 am-8:15 pm

1 stop24h 50m

Sofia

Tue 9/8

9:05 pm-9:40 am

1 stop20h 35m

$852

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 8/3

5:10 pm-1:50 pm

1 stop12h 40m

Sofia

Sat 10/3

2:35 pm-3:10 pm

1 stop32h 35m

$853

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 8/1

9:40 pm-12:10 pm

2 stops30h 30m

Sofia

Tue 9/8

6:10 am-6:15 pm

1 stop20h 05m

$854

Quickest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 9/6

12:55 pm-6:10 pm

2 stops21h 15m

Sofia

Tue 9/22

8:00 am-5:00 pm

2 stops17h 00m

$855

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 7/27

9:40 pm-11:15 pm

1 stop17h 35m

Sofia

Wed 8/12

7:00 pm-12:55 pm

1 stop25h 55m

$856

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 7/30

8:10 pm-8:45 am

1 stop28h 35m

Sofia

Fri 9/18

2:05 pm-9:40 am

1 stop27h 35m

$857

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 8/13

5:10 pm-1:55 am

2 stops24h 45m

Sofia

Sun 8/30

6:45 pm-7:50 pm

1 stop33h 05m

$858

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 7/30

7:05 pm-12:55 pm

1 stop33h 50m

Sofia

Fri 9/18

6:20 am-8:12 pm

2 stops21h 52m

$859

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 8/15

9:22 pm-12:10 pm

2 stops30h 48m

Sofia

Mon 8/31

1:40 pm-1:20 pm

1 stop31h 40m

$860

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 October. Flight prices, which tend to average around $385, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of October, then book flights to Sofia from Chicago during November instead. Flights to Sofia in November, while not as cheap as those in October, still average around $429.

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 $752 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 $706 on momondo.

Can stopping save me money on Chicago to Sofia flights?

You could potentially save up to 14% 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 May 2026, prices for Chicago to Sofia flights are approximately 9% 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	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

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 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 May 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 Turkish Airlines, representing 28% of all bookings. The subsequent popular airlines are Lufthansa at 28%, United Airlines at 15%, and LOT at 13%.

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
KLM	PriceFrom $425	Free Cancellation	Rating 7.8 1,517 reviews	Search KLM flights
ITA Airways	PriceFrom $508	Free Cancellation	Rating 6.7 1,213 reviews	Search ITA Airways flights
Turkish Airlines	PriceFrom $521	Free Cancellation	Rating 7.4 4,362 reviews	Search Turkish Airlines flights
United Airlines	PriceFrom $561	Free Cancellation	Rating 7.4 9,701 reviews	Search United Airlines flights
SWISS	PriceFrom $564	Free Cancellation	Rating 7.6 1,943 reviews	Search SWISS flights
Lufthansa	PriceFrom $580	Free Cancellation	Rating 6.8 7,993 reviews	Search Lufthansa flights
LOT	PriceFrom $581	Free Cancellation	Rating 7.5 1,189 reviews	Search LOT flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.4 1,587 reviews	Search Air France flights
Austrian Airlines	PriceFrom $587	Free Cancellation	Rating 7.6 915 reviews	Search Austrian Airlines flights
British Airways	PriceFrom $609	Free Cancellation	Rating 6.7 7,974 reviews	Search British Airways flights

Bansko

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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 $332

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 8/19. 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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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

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

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

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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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