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

Flights via Zurich (ZRH) offer the lowest average round-trip price of $673.

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

Zurich (ZRH) has the shortest average layover time for this route: 1h 31m.

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

KLM and Air France 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 17m.

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

Istanbul (IST) was the most common stop: 34% 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 34% 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 June 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

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 $873 to $1,230. The lowest price recently found on this route was $842.

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.

3:40 pm - 6:40 pm

ORD

SOF

19h 00m

2 stops

6:10 am - 8:12 pm

SOF

ORD

22h 02m

2 stops

$842Air Canada

Tue, Jul 28 - Tue, Sep 8

2:20 pm - 10:20 am

ORD

SOF

12h 00m

1 stop

3:40 pm - 12:35 pm

SOF

ORD

28h 55m

1 stop

$843SWISS

Wed, Jul 29 - Mon, Sep 7

8:10 pm - 12:15 pm

ORD

SOF

32h 05m

1 stop

12:35 pm - 9:40 am

SOF

ORD

29h 05m

1 stop

$844Turkish Airlines

Fri, Aug 14 - Fri, Aug 28

11:07 am - 12:10 pm

ORD

SOF

17h 03m

2 stops

6:10 am - 11:40 pm

SOF

ORD

25h 30m

2 stops

$845United Airlines

Thu, Jul 30 - Thu, Aug 20

9:50 pm - 6:00 pm

ORD

SOF

12h 10m

1 stop

2:35 pm - 7:50 pm

SOF

ORD

13h 15m

1 stop

$846LOT

Fri, Sep 11 - Tue, Sep 22

1:27 pm - 2:00 pm

MDW

SOF

16h 33m

2 stops

7:00 am - 6:01 pm

SOF

MDW

19h 01m

2 stops

$846Multiple Airlines

Wed, Aug 19 - Thu, Sep 3

8:10 pm - 1:50 pm

ORD

SOF

33h 40m

1 stop

6:45 pm - 7:50 pm

SOF

ORD

33h 05m

1 stop

$847LOT

Fri, Aug 7 - Mon, Sep 7

1:51 pm - 2:00 pm

MDW

SOF

16h 09m

2 stops

7:00 am - 4:25 pm

SOF

MDW

17h 25m

2 stops

$847Multiple Airlines

Mon, Aug 17 - Tue, Oct 6

10:30 pm - 10:40 pm

ORD

SOF

16h 10m

1 stop

7:00 pm - 12:55 pm

SOF

ORD

25h 55m

1 stop

$848Lufthansa

Mon, Jul 27 - Wed, Aug 12

3:35 pm - 6:40 pm

ORD

SOF

19h 05m

1 stop

2:10 pm - 11:00 am

SOF

ORD

28h 50m

1 stop

$849United Airlines

Sun, Aug 9 - Tue, Aug 18

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Air Canada flights from Chicago to Sofia

Our best Air Canada deals on Chicago to Sofia flight tickets

Air Canada

Jul 28

ORD5:58 pmChicago O'Hare Intl

40h 42m

2 stops

SOF6:40 pmSofia

Sep 9

SOF6:20 amSofia

33h 31m

2 stops

ORD7:51 amChicago O'Hare Intl

$842

Air Canada

Nov 20

ORD12:50 pmChicago O'Hare Intl

21h 30m

2 stops

SOF6:20 pmSofia

Dec 3

SOF6:25 amSofia

21h 27m

2 stops

ORD7:52 pmChicago O'Hare Intl

$843

Air Canada

Aug 3

ORD3:40 pmChicago O'Hare Intl

37h 25m

2 stops

SOF1:05 pmSofia

Sep 10

SOF6:30 amSofia

16h 22m

2 stops

ORD2:52 pmChicago O'Hare Intl

$854

United Airlines flights from Chicago to Sofia

Our best United Airlines deals on Chicago to Sofia flight tickets

United Airlines

Jul 30

ORD11:07 amChicago O'Hare Intl

17h 03m

2 stops

SOF12:10 pmSofia

Aug 20

SOF6:10 amSofia

25h 30m

2 stops

ORD11:40 pmChicago O'Hare Intl

$845

United Airlines

Aug 9

ORD3:35 pmChicago O'Hare Intl

19h 05m

1 stop

SOF6:40 pmSofia

Aug 18

SOF2:10 pmSofia

28h 50m

1 stop

ORD11:00 amChicago O'Hare Intl

$849

United Airlines

Jul 30

ORD11:07 amChicago O'Hare Intl

17h 03m

2 stops

SOF12:10 pmSofia

Aug 18

SOF2:10 pmSofia

28h 50m

1 stop

ORD11:00 amChicago O'Hare Intl

$853

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 7/28

3:40 pm-6:40 pm

2 stops19h 00m

Sofia

Tue 9/8

6:10 am-8:12 pm

2 stops22h 02m

$842

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 7/29

2:20 pm-10:20 am

1 stop12h 00m

Sofia

Mon 9/7

3:40 pm-12:35 pm

1 stop28h 55m

$843

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 8/14

8:10 pm-12:15 pm

1 stop32h 05m

Sofia

Fri 8/28

12:35 pm-9:40 am

1 stop29h 05m

$844

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 7/30

11:07 am-12:10 pm

2 stops17h 03m

Sofia

Thu 8/20

6:10 am-11:40 pm

2 stops25h 30m

$845

Quickest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 9/11

9:50 pm-6:00 pm

1 stop12h 10m

Sofia

Tue 9/22

2:35 pm-7:50 pm

1 stop13h 15m

$846

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Wed 8/19

1:27 pm-2:00 pm

2 stops16h 33m

Sofia

Thu 9/3

7:00 am-6:01 pm

2 stops19h 01m

$846

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 8/7

8:10 pm-1:50 pm

1 stop33h 40m

Sofia

Mon 9/7

6:45 pm-7:50 pm

1 stop33h 05m

$847

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Mon 8/17

1:51 pm-2:00 pm

2 stops16h 09m

Sofia

Tue 10/6

7:00 am-4:25 pm

2 stops17h 25m

$847

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 7/27

10:30 pm-10:40 pm

1 stop16h 10m

Sofia

Wed 8/12

7:00 pm-12:55 pm

1 stop25h 55m

$848

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 8/9

3:35 pm-6:40 pm

1 stop19h 05m

Sofia

Tue 8/18

2:10 pm-11:00 am

1 stop28h 50m

$849

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 September instead. Flights to Sofia in September, while not as cheap as those in October, still average around $441.

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 $756 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 $690 on momondo.

Can stopping save me money on Chicago to Sofia flights?

You could potentially save up to 29% 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 June 2026, prices for Chicago to Sofia flights are approximately 9% 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	13h 10m
Direct flights	None

The fastest flight from Chicago to Sofia takes 13h 10m

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 13h 10m.
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 June 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 32% of all bookings. The subsequent popular airlines are Turkish Airlines at 24%, United Airlines at 12%, and LOT at 11%.

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 $508	Free Cancellation	Rating 6.7 1,266 reviews	Search ITA Airways flights
Turkish Airlines	PriceFrom $521	Free Cancellation	Rating 7.4 4,417 reviews	Search Turkish Airlines flights
KLM	PriceFrom $533	Free Cancellation	Rating 7.8 1,530 reviews	Search KLM flights
United Airlines	PriceFrom $561	Free Cancellation	Rating 7.4 9,887 reviews	Search United Airlines flights
SWISS	PriceFrom $565	Free Cancellation	Rating 7.5 1,971 reviews	Search SWISS flights
Austrian Airlines	PriceFrom $575	Free Cancellation	Rating 7.6 939 reviews	Search Austrian Airlines flights
LOT	PriceFrom $578	Free Cancellation	Rating 7.5 1,205 reviews	Search LOT flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.5 1,614 reviews	Search Air France flights
Lufthansa	PriceFrom $586	Free Cancellation	Rating 6.8 8,092 reviews	Search Lufthansa flights
British Airways	PriceFrom $609	Free Cancellation	Rating 6.7 8,072 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.

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Cheap flights from Chicago to Sofia from $311

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 9/16. 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 Canada flights from Chicago to Sofia

Our best Air Canada 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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