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 is the cheapest airline that flies from Chicago to Sofia?

Air France is the most popular carrier 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 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.

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

Istanbul (IST) was the most common stop: 32% of momondo users choosing 1-stop flights on this route connected there.

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 18m.

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

Zurich (ZRH) has the shortest average layover time for this route: 1h 30m.

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 July 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.

$306 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 $843 to $1,205. The lowest price recently found on this route was $836.

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.

2:01 pm - 6:40 pm

ORD

SOF

20h 39m

2 stops

6:20 am - 7:55 pm

SOF

ORD

21h 35m

1 stop

$836Multiple Airlines

Wed, Oct 7 - Sun, Oct 18

9:40 pm - 6:40 pm

ORD

SOF

13h 00m

1 stop

6:10 am - 2:52 pm

SOF

ORD

16h 42m

2 stops

$837Multiple Airlines

Wed, Aug 19 - Tue, Sep 15

7:11 am - 6:40 pm

ORD

SOF

27h 29m

2 stops

6:30 am - 12:55 pm

SOF

ORD

14h 25m

1 stop

$838Multiple Airlines

Wed, Aug 19 - Thu, Sep 3

7:25 pm - 11:10 pm

ORD

SOF

19h 45m

2 stops

6:45 pm - 9:25 pm

SOF

ORD

34h 40m

3 stops

$839Multiple Airlines

Wed, Aug 5 - Mon, Aug 24

9:40 pm - 6:40 pm

ORD

SOF

13h 00m

1 stop

6:20 am - 12:55 pm

SOF

ORD

14h 35m

1 stop

$840Lufthansa

Sun, Aug 23 - Sun, Sep 6

3:40 pm - 6:40 pm

ORD

SOF

19h 00m

2 stops

6:10 am - 2:52 pm

SOF

ORD

16h 42m

2 stops

$841Air Canada

Wed, Aug 19 - Tue, Sep 15

3:53 pm - 6:40 pm

ORD

SOF

18h 47m

2 stops

6:20 am - 4:59 pm

SOF

ORD

18h 39m

2 stops

$842United Airlines

Wed, Aug 5 - Mon, Aug 24

9:50 am - 12:10 pm

ORD

SOF

18h 20m

2 stops

2:10 pm - 7:55 pm

SOF

ORD

13h 45m

1 stop

$843United Airlines

Mon, Aug 17 - Thu, Sep 17

1:51 pm - 2:00 pm

MDW

SOF

16h 09m

2 stops

7:00 am - 10:45 pm

SOF

MDW

23h 45m

2 stops

$853Air France

Tue, Aug 18 - Wed, Sep 16

1:25 pm - 2:00 pm

MDW

SOF

16h 35m

2 stops

7:00 am - 10:45 pm

SOF

MDW

23h 45m

2 stops

$903Air France

Thu, Aug 20 - Wed, Sep 16

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LOT flights from Chicago to Sofia

Our best LOT deals on Chicago to Sofia flight tickets

LOT

Aug 7

ORD8:10 pmChicago O'Hare Intl

33h 40m

1 stop

SOF1:50 pmSofia

Sep 7

SOF6:45 pmSofia

33h 05m

1 stop

ORD7:50 pmChicago O'Hare Intl

$847

LOT

Aug 1

ORD9:50 pmChicago O'Hare Intl

20h 05m

1 stop

SOF1:55 amSofia

Aug 25

SOF2:35 pmSofia

32h 35m

2 stops

ORD3:10 pmChicago O'Hare Intl

$868

LOT

Sep 11

ORD5:10 pmChicago O'Hare Intl

16h 50m

2 stops

SOF6:00 pmSofia

Sep 25

SOF6:45 pmSofia

28h 25m

2 stops

ORD3:10 pmChicago O'Hare Intl

$883

Lufthansa flights from Chicago to Sofia

Our best Lufthansa deals on Chicago to Sofia flight tickets

Lufthansa

Aug 23

ORD9:40 pmChicago O'Hare Intl

13h 00m

1 stop

SOF6:40 pmSofia

Sep 6

SOF6:20 amSofia

14h 35m

1 stop

ORD12:55 pmChicago O'Hare Intl

$840

Lufthansa

Aug 6

ORD9:40 pmChicago O'Hare Intl

13h 00m

1 stop

SOF6:40 pmSofia

Aug 20

SOF6:30 amSofia

14h 25m

1 stop

ORD12:55 pmChicago O'Hare Intl

$854

Lufthansa

Aug 23

ORD3:35 pmChicago O'Hare Intl

19h 05m

1 stop

SOF6:40 pmSofia

Sep 6

SOF6:10 amSofia

14h 45m

2 stops

ORD12:55 pmChicago O'Hare Intl

$855

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 10/7

2:01 pm-6:40 pm

2 stops20h 39m

Sofia

Sun 10/18

6:20 am-7:55 pm

1 stop21h 35m

$836

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 8/19

9:40 pm-6:40 pm

1 stop13h 00m

Sofia

Tue 9/15

6:10 am-2:52 pm

2 stops16h 42m

$837

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 8/19

7:11 am-6:40 pm

2 stops27h 29m

Sofia

Thu 9/3

6:30 am-12:55 pm

1 stop14h 25m

$838

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 8/5

7:25 pm-11:10 pm

2 stops19h 45m

Sofia

Mon 8/24

6:45 pm-9:25 pm

3 stops34h 40m

$839

Quickest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 8/23

9:40 pm-6:40 pm

1 stop13h 00m

Sofia

Sun 9/6

6:20 am-12:55 pm

1 stop14h 35m

$840

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 8/19

3:40 pm-6:40 pm

2 stops19h 00m

Sofia

Tue 9/15

6:10 am-2:52 pm

2 stops16h 42m

$841

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 8/5

3:53 pm-6:40 pm

2 stops18h 47m

Sofia

Mon 8/24

6:20 am-4:59 pm

2 stops18h 39m

$842

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 8/17

9:50 am-12:10 pm

2 stops18h 20m

Sofia

Thu 9/17

2:10 pm-7:55 pm

1 stop13h 45m

$843

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Tue 8/18

1:51 pm-2:00 pm

2 stops16h 09m

Sofia

Wed 9/16

7:00 am-10:45 pm

2 stops23h 45m

$853

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Thu 8/20

1:25 pm-2:00 pm

2 stops16h 35m

Sofia

Wed 9/16

7:00 am-10:45 pm

2 stops23h 45m

$903

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 January instead. Flights to Sofia in January, while not as cheap as those in October, still average around $472.

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 $764 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 $693 on momondo.

Can stopping save me money on Chicago to Sofia flights?

You could potentially save up to 1% 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 July 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 30m
Direct flights	None

The fastest flight from Chicago to Sofia takes 12h 30m

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 30m.
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 July 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 23%, United Airlines at 13%, 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 1,277 reviews	Search ITA Airways flights
Turkish Airlines	PriceFrom $520	Free Cancellation	Rating 7.4 4,436 reviews	Search Turkish Airlines flights
SWISS	PriceFrom $565	Free Cancellation	Rating 7.5 1,988 reviews	Search SWISS flights
United Airlines	PriceFrom $566	Free Cancellation	Rating 7.4 9,938 reviews	Search United Airlines flights
Austrian Airlines	PriceFrom $575	Free Cancellation	Rating 7.6 939 reviews	Search Austrian Airlines flights
LOT	PriceFrom $578	Free Cancellation	Rating 7.5 1,209 reviews	Search LOT flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.5 1,620 reviews	Search Air France flights
Lufthansa	PriceFrom $586	Free Cancellation	Rating 6.8 8,116 reviews	Search Lufthansa flights
British Airways	PriceFrom $609	Free Cancellation	Rating 6.7 8,096 reviews	Search British Airways flights
KLM	PriceFrom $614	Free Cancellation	Rating 7.8 1,534 reviews	Search KLM 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 $306

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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LOT flights from Chicago to Sofia

Our best LOT deals on Chicago to Sofia flight tickets

Lufthansa flights from Chicago to Sofia

Our best Lufthansa 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.

Find better results for your trip to Bulgaria

Fly your favorite airline to Sofia

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Cabin classes currently available on flights to Sofia

List of cabin classes available on flights landing in Sofia. Availability may vary depending on flight origin and airline.

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