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 35% 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?

Warsaw (WAW) has the shortest average layover time for this route: 1h 43m.

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

Istanbul (IST) was the most common stop: 36% 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 Paris (CDG) offer the lowest average round-trip price of $566.

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 03m.

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 February 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.

$272 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 typical for flights on this route. Typical prices usually range from $524 to $633. The lowest price recently found on this route was $539.

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Find the cheapest flights from Chicago to Sofia

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One-way

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8:20 pm - 8:50 pm

ORD

SOF

16h 30m

1 stop

9:35 am - 11:05 am

SOF

ORD

32h 30m

1 stop

$539Turkish Airlines

Tue, Mar 3 - Tue, Mar 24

11:50 am - 8:50 pm

ORD

SOF

25h 00m

1 stop

9:35 am - 7:25 pm

SOF

ORD

16h 50m

1 stop

$546Turkish Airlines

Sun, Mar 1 - Thu, Mar 12

8:10 pm - 8:45 am

ORD

SOF

28h 35m

1 stop

9:35 am - 6:15 pm

SOF

ORD

16h 40m

1 stop

$548Turkish Airlines

Mon, Apr 6 - Thu, Apr 23

8:20 pm - 3:10 pm

ORD

SOF

34h 50m

1 stop

9:35 am - 9:40 am

SOF

ORD

32h 05m

1 stop

$549Turkish Airlines

Wed, Feb 18 - Wed, Apr 15

8:10 pm - 8:15 pm

ORD

SOF

16h 05m

1 stop

9:05 pm - 9:40 am

SOF

ORD

20h 35m

1 stop

$552Turkish Airlines

Mon, Apr 6 - Wed, Apr 22

8:10 pm - 8:15 pm

ORD

SOF

16h 05m

1 stop

9:05 pm - 9:40 am

SOF

ORD

20h 35m

1 stop

$558Turkish Airlines

Thu, Apr 2 - Thu, Apr 16

8:16 pm - 1:50 pm

ORD

SOF

34h 34m

3 stops

2:00 pm - 12:22 am

SOF

ORD

17h 22m

2 stops

$569Multiple Airlines

Tue, Mar 10 - Tue, Mar 24

1:10 pm - 2:00 pm

MDW

SOF

16h 50m

2 stops

7:00 am - 5:58 pm

SOF

MDW

18h 58m

2 stops

$699KLM

Mon, Apr 6 - Wed, Apr 22

1:22 pm - 2:00 pm

MDW

SOF

16h 38m

2 stops

7:00 am - 6:14 pm

SOF

MDW

19h 14m

2 stops

$774KLM

Mon, May 11 - Fri, May 29

1:26 pm - 2:05 pm

MDW

SOF

16h 39m

2 stops

7:00 am - 6:14 pm

SOF

MDW

19h 14m

2 stops

$805KLM

Wed, Feb 25 - Thu, May 14

LOT flights from Chicago to Sofia

Our best LOT deals on Chicago to Sofia flight tickets

LOT

Mar 11

ORD10:55 pmChicago O'Hare Intl

31h 55m

1 stop

SOF1:50 pmSofia

Mar 31

SOF6:45 pmSofia

33h 05m

1 stop

ORD7:50 pmChicago O'Hare Intl

$574

LOT

Mar 30

ORD9:50 pmChicago O'Hare Intl

20h 05m

1 stop

SOF1:55 amSofia

Apr 13

SOF5:25 amSofia

22h 25m

1 stop

ORD7:50 pmChicago O'Hare Intl

$575

LOT

Mar 8

ORD10:55 pmChicago O'Hare Intl

31h 55m

2 stops

SOF1:50 pmSofia

Mar 18

SOF2:35 pmSofia

13h 25m

1 stop

ORD9:00 pmChicago O'Hare Intl

$581

KLM flights from Chicago to Sofia

Our best KLM deals on Chicago to Sofia flight tickets

KLM

Apr 6

MDW1:10 pmChicago Midway

16h 50m

2 stops

SOF2:00 pmSofia

Apr 22

SOF7:00 amSofia

18h 58m

2 stops

MDW5:58 pmChicago Midway

$699

KLM

May 11

MDW1:22 pmChicago Midway

16h 38m

2 stops

SOF2:00 pmSofia

May 29

SOF7:00 amSofia

19h 14m

2 stops

MDW6:14 pmChicago Midway

$774

KLM

Feb 25

MDW1:26 pmChicago Midway

16h 39m

2 stops

SOF2:05 pmSofia

May 14

SOF7:00 amSofia

19h 14m

2 stops

MDW6:14 pmChicago Midway

$805

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 3/3

8:20 pm-8:50 pm

1 stop16h 30m

Sofia

Tue 3/24

9:35 am-11:05 am

1 stop32h 30m

$539

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 3/1

11:50 am-8:50 pm

1 stop25h 00m

Sofia

Thu 3/12

9:35 am-7:25 pm

1 stop16h 50m

$546

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 4/6

8:10 pm-8:45 am

1 stop28h 35m

Sofia

Thu 4/23

9:35 am-6:15 pm

1 stop16h 40m

$548

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 2/18

8:20 pm-3:10 pm

1 stop34h 50m

Sofia

Wed 4/15

9:35 am-9:40 am

1 stop32h 05m

$549

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 4/6

8:10 pm-8:15 pm

1 stop16h 05m

Sofia

Wed 4/22

9:05 pm-9:40 am

1 stop20h 35m

$552

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 4/2

8:10 pm-8:15 pm

1 stop16h 05m

Sofia

Thu 4/16

9:05 pm-9:40 am

1 stop20h 35m

$558

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 3/10

8:16 pm-1:50 pm

3 stops34h 34m

Sofia

Tue 3/24

2:00 pm-12:22 am

2 stops17h 22m

$569

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Mon 4/6

1:10 pm-2:00 pm

2 stops16h 50m

Sofia

Wed 4/22

7:00 am-5:58 pm

2 stops18h 58m

$699

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Mon 5/11

1:22 pm-2:00 pm

2 stops16h 38m

Sofia

Fri 5/29

7:00 am-6:14 pm

2 stops19h 14m

$774

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Wed 2/25

1:26 pm-2:05 pm

2 stops16h 39m

Sofia

Thu 5/14

7:00 am-6:14 pm

2 stops19h 14m

$805

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 $574, 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 March instead. Flights to Sofia in March, while not as cheap as those in February, still average around $597.

How far in advance should I book a flight 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 $742 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 $712 on momondo.

Can stopping save me money on Chicago to Sofia flights?

You could potentially save up to 23% 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 February 2026, prices for Chicago to Sofia flights are approximately 32% 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	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

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 February 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 25%, LOT at 17%, and United Airlines at 15%.

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 $469	Free Cancellation	Rating 6.7 1,145 reviews	Search ITA Airways flights
Turkish Airlines	PriceFrom $520	Free Cancellation	Rating 7.3 4,207 reviews	Search Turkish Airlines flights
KLM	PriceFrom $533	Free Cancellation	Rating 7.7 1,450 reviews	Search KLM flights
United Airlines	PriceFrom $566	Free Cancellation	Rating 7.4 9,256 reviews	Search United Airlines flights
SWISS	PriceFrom $569	Free Cancellation	Rating 7.6 1,867 reviews	Search SWISS flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.4 1,531 reviews	Search Air France flights
Lufthansa	PriceFrom $587	Free Cancellation	Rating 6.8 7,775 reviews	Search Lufthansa flights
LOT	PriceFrom $595	Free Cancellation	Rating 7.5 1,179 reviews	Search LOT flights
Austrian Airlines	PriceFrom $606	Free Cancellation	Rating 7.5 896 reviews	Search Austrian Airlines flights
British Airways	PriceFrom $609	Free Cancellation	Rating 6.7 7,720 reviews	Search British Airways 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.

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.

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Cheap flights from Chicago to Sofia from $272

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 4/17. 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

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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 to Sofia?

Can stopping save me money on Chicago to Sofia flights?

You could potentially save up to 23% 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 February 2026, prices for Chicago to Sofia flights are approximately 32% more expensive when compared to flights at the same time last year.

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?

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

Istanbul (IST) was the most common stop: 36% 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 Paris (CDG) offer the lowest average round-trip price of $566.

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 03m.

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

Warsaw (WAW) has the shortest average layover time for this route: 1h 43m.

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

How far is Chicago to Sofia by plane?

When did momondo last update prices for flights from Chicago to Sofia Airport?

How many operators does momondo search for flights from Chicago to Sofia Airport?

How old do you have to be to fly from Chicago to Sofia Airport?

What documentation or ID do you need to fly to Sofia Airport?

What is the most popular airline 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?

Why should I use momondo to find a flight deal from Chicago to Sofia?

Can I find flights from Chicago to Sofia with flexible booking policies on momondo?

How can momondo help me find flights from Chicago to Sofia?

I’m not ready to book a flight from Chicago to Sofia right now. Can momondo alert me if prices change?

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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