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

Istanbul (IST) was the most common stop: 41% of momondo users choosing 1-stop flights on this route connected there.

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

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 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.

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

Vienna (VIE) has the shortest average layover time for this route: 1h 33m.

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 36m.

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

Flights via Zurich (ZRH) offer the lowest average round-trip price of $699.

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 April 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.

$319 Cheap Flights from Chicago to Sofia in 2026

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 $1,003 to $730. The lowest price recently found on this route was $676.

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Find the cheapest flights from Chicago to Sofia

Round-trip

One-way

Last minute

Cheap round-trip flights

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11:25 am - 3:00 pm

ORD

SOF

19h 35m

1 stop

3:50 pm - 9:40 am

SOF

ORD

25h 50m

1 stop

$676Turkish Airlines

Fri, Sep 11 - Fri, Sep 25

8:10 pm - 3:00 pm

ORD

SOF

34h 50m

1 stop

2:05 pm - 9:40 am

SOF

ORD

27h 35m

1 stop

$680Turkish Airlines

Thu, Jul 30 - Fri, Sep 18

8:10 pm - 8:15 pm

ORD

SOF

16h 05m

1 stop

9:05 pm - 9:40 am

SOF

ORD

20h 35m

1 stop

$681Turkish Airlines

Mon, Sep 14 - Mon, Sep 28

11:25 am - 3:00 pm

ORD

SOF

19h 35m

1 stop

3:50 pm - 9:40 am

SOF

ORD

25h 50m

1 stop

$685Turkish Airlines

Fri, Sep 11 - Sat, Sep 19

8:10 pm - 8:15 pm

ORD

SOF

16h 05m

1 stop

3:50 pm - 9:40 am

SOF

ORD

25h 50m

1 stop

$686Turkish Airlines

Wed, Oct 7 - Sun, Oct 18

11:20 pm - 3:30 pm

ORD

SOF

32h 10m

1 stop

5:00 am - 9:15 pm

SOF

ORD

24h 15m

1 stop

$696Air Serbia

Sat, Sep 19 - Sat, Oct 3

1:16 pm - 2:00 pm

MDW

SOF

16h 44m

2 stops

7:00 am - 4:27 pm

SOF

MDW

17h 27m

2 stops

$797KLM

Sun, Aug 2 - Fri, Aug 21

1:16 pm - 2:00 pm

MDW

SOF

16h 44m

2 stops

7:00 am - 6:05 pm

SOF

MDW

19h 05m

2 stops

$847KLM

Wed, Aug 5 - Tue, Aug 25

1:16 pm - 2:00 pm

MDW

SOF

16h 44m

2 stops

7:00 am - 4:27 pm

SOF

MDW

17h 27m

2 stops

$848Multiple Airlines

Mon, Jul 6 - Fri, Aug 21

1:16 pm - 2:00 pm

MDW

SOF

16h 44m

2 stops

7:00 am - 4:27 pm

SOF

MDW

17h 27m

2 stops

$873Multiple Airlines

Tue, Jul 28 - Tue, Aug 18

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Air Serbia flights from Chicago to Sofia

Our best Air Serbia deals on Chicago to Sofia flight tickets

Air Serbia

Sep 19

ORD11:20 pmChicago O'Hare Intl

32h 10m

1 stop

SOF3:30 pmSofia

Oct 3

SOF5:00 amSofia

24h 15m

1 stop

ORD9:15 pmChicago O'Hare Intl

$696

Air Serbia

Sep 12

ORD11:20 pmChicago O'Hare Intl

19h 40m

1 stop

SOF3:00 amSofia

Sep 26

SOF4:00 pmSofia

13h 15m

1 stop

ORD9:15 pmChicago O'Hare Intl

$724

Air Serbia

Aug 22

ORD11:20 pmChicago O'Hare Intl

32h 10m

1 stop

SOF3:30 pmSofia

Sep 5

SOF5:00 amSofia

24h 15m

1 stop

ORD9:15 pmChicago O'Hare Intl

$725

KLM flights from Chicago to Sofia

Our best KLM deals on Chicago to Sofia flight tickets

KLM

Aug 2

MDW1:16 pmChicago Midway

16h 44m

2 stops

SOF2:00 pmSofia

Aug 21

SOF7:00 amSofia

17h 27m

2 stops

MDW4:27 pmChicago Midway

$797

KLM

Aug 5

MDW1:16 pmChicago Midway

16h 44m

2 stops

SOF2:00 pmSofia

Aug 25

SOF7:00 amSofia

19h 05m

2 stops

MDW6:05 pmChicago Midway

$847

KLM

Aug 1

MDW1:16 pmChicago Midway

16h 44m

2 stops

SOF2:00 pmSofia

Aug 28

SOF7:00 amSofia

17h 27m

2 stops

MDW4:27 pmChicago Midway

$903

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 9/11

11:25 am-3:00 pm

1 stop19h 35m

Sofia

Fri 9/25

3:50 pm-9:40 am

1 stop25h 50m

$676

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 7/30

8:10 pm-3:00 pm

1 stop34h 50m

Sofia

Fri 9/18

2:05 pm-9:40 am

1 stop27h 35m

$680

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 9/14

8:10 pm-8:15 pm

1 stop16h 05m

Sofia

Mon 9/28

9:05 pm-9:40 am

1 stop20h 35m

$681

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 9/11

11:25 am-3:00 pm

1 stop19h 35m

Sofia

Sat 9/19

3:50 pm-9:40 am

1 stop25h 50m

$685

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 10/7

8:10 pm-8:15 pm

1 stop16h 05m

Sofia

Sun 10/18

3:50 pm-9:40 am

1 stop25h 50m

$686

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 9/19

11:20 pm-3:30 pm

1 stop32h 10m

Sofia

Sat 10/3

5:00 am-9:15 pm

1 stop24h 15m

$696

Quickest round-trip

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Sun 8/2

1:16 pm-2:00 pm

2 stops16h 44m

Sofia

Fri 8/21

7:00 am-4:27 pm

2 stops17h 27m

$797

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Wed 8/5

1:16 pm-2:00 pm

2 stops16h 44m

Sofia

Tue 8/25

7:00 am-6:05 pm

2 stops19h 05m

$847

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Mon 7/6

1:16 pm-2:00 pm

2 stops16h 44m

Sofia

Fri 8/21

7:00 am-4:27 pm

2 stops17h 27m

$848

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Tue 7/28

1:16 pm-2:00 pm

2 stops16h 44m

Sofia

Tue 8/18

7:00 am-4:27 pm

2 stops17h 27m

$873

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 $575, 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 $747 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 $713 on momondo.

Can stopping save me money on Chicago to Sofia flights?

You could potentially save up to 3% 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 April 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	12h 50m
Direct flights	None

The fastest flight from Chicago to Sofia takes 12h 50m

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

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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 50m.
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 April 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 27% of all bookings. The subsequent popular airlines are Turkish Airlines at 27%, LOT at 15%, 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
KLM	PriceFrom $425	Free Cancellation	Rating 7.8 1,508 reviews	Search KLM flights
ITA Airways	PriceFrom $508	Free Cancellation	Rating 6.7 1,195 reviews	Search ITA Airways flights
Turkish Airlines	PriceFrom $521	Free Cancellation	Rating 7.4 4,326 reviews	Search Turkish Airlines flights
United Airlines	PriceFrom $561	Free Cancellation	Rating 7.4 9,644 reviews	Search United Airlines flights
SWISS	PriceFrom $564	Free Cancellation	Rating 7.6 1,926 reviews	Search SWISS flights
Austrian Airlines	PriceFrom $575	Free Cancellation	Rating 7.6 906 reviews	Search Austrian Airlines flights
LOT	PriceFrom $580	Free Cancellation	Rating 7.5 1,189 reviews	Search LOT flights
Lufthansa	PriceFrom $582	Free Cancellation	Rating 6.8 7,944 reviews	Search Lufthansa flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.4 1,579 reviews	Search Air France flights
British Airways	PriceFrom $609	Free Cancellation	Rating 6.7 7,910 reviews	Search British Airways flights

Bansko

Borovets

Velingrad

Sandanski

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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 $319

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 5/4. 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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Air Serbia flights from Chicago to Sofia

Our best Air Serbia deals on Chicago to Sofia flight tickets

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Our best KLM deals on Chicago to Sofia flight tickets

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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

Daily price changes in your inbox - only with Price Alerts.

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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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