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

Flights via Paris (CDG) offer the lowest average round-trip price of $706.

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 10 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 42m.

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 is the cheapest airline that flies from Chicago to Sofia?

Air France is the most popular carrier 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 07m.

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 December 2025, there are 10 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.

$239 Cheap Flights from Chicago to Sofia in 2025/26

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 $626 to $853. The lowest price recently found on this route was $551.

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Find the cheapest flights from Chicago to Sofia

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

11:50 am - 3:10 pm

ORD

SOF

19h 20m1 stop

4:00 pm - 11:05 am

SOF

ORD

26h 05m1 stop

$551Turkish Airlines

Wed, Mar 4 - Sun, Mar 8

8:20 pm - 8:50 pm

ORD

SOF

16h 30m1 stop

9:35 am - 6:25 pm

SOF

ORD

16h 50m1 stop

$557Turkish Airlines

Thu, Jan 22 - Sat, Feb 14

9:05 pm - 10:45 pm

ORD

SOF

17h 40m2 stops

6:05 am - 2:10 pm

SOF

ORD

16h 05m1 stop

$560Lufthansa

Thu, Jan 15 - Fri, Feb 13

9:50 pm - 10:45 pm

ORD

SOF

16h 55m1 stop

6:05 am - 2:10 pm

SOF

ORD

16h 05m1 stop

$562Lufthansa

Thu, Jan 15 - Fri, Feb 13

7:50 pm - 3:00 pm

ORD

SOF

35h 10m1 stop

9:35 am - 6:15 pm

SOF

ORD

16h 40m1 stop

$563Turkish Airlines

Mon, May 4 - Mon, May 11

9:05 pm - 11:50 am

ORD

SOF

30h 45m2 stops

6:45 pm - 2:00 pm

SOF

ORD

27h 15m1 stop

$567Austrian Airlines

Tue, Feb 10 - Tue, Feb 24

2:00 pm - 11:50 am

ORD

SOF

13h 50m2 stops

6:25 am - 3:20 pm

SOF

ORD

16h 55m1 stop

$572Multiple Airlines

Sat, Feb 14 - Sat, Feb 28

1:49 pm - 2:05 pm

MDW

SOF

16h 16m2 stops

7:00 am - 5:55 pm

SOF

MDW

17h 55m2 stops

$630KLM

Wed, Mar 4 - Mon, Mar 9

1:10 pm - 2:00 pm

MDW

SOF

16h 50m2 stops

7:00 am - 4:55 pm

SOF

MDW

17h 55m2 stops

$638KLM

Thu, Apr 2 - Mon, Apr 6

1:49 pm - 1:55 pm

MDW

SOF

16h 06m2 stops

7:00 am - 5:55 pm

SOF

MDW

17h 55m2 stops

$994Multiple Airlines

Fri, Mar 6 - Mon, Mar 9

KLM flights from Chicago to Sofia

Our best KLM deals on Chicago to Sofia flight tickets

KLM

Mar 4

ORD2:21 pmChicago O'Hare Intl

15h 44m

2 stops

SOF2:05 pmSofia

Mar 9

SOF7:00 amSofia

18h 31m

2 stops

ORD6:31 pmChicago O'Hare Intl

$630

Find similar

KLM

Apr 2

MDW1:10 pmChicago Midway

16h 50m

2 stops

SOF2:00 pmSofia

Apr 6

SOF7:00 amSofia

17h 55m

2 stops

MDW4:55 pmChicago Midway

$638

Find similar

KLM

Mar 4

MDW1:28 pmChicago Midway

16h 37m

2 stops

SOF2:05 pmSofia

Mar 8

SOF7:00 amSofia

17h 55m

2 stops

MDW4:55 pmChicago Midway

$672

Find similar

LOT flights from Chicago to Sofia

Our best LOT deals on Chicago to Sofia flight tickets

LOT

Apr 8

ORD9:50 pmChicago O'Hare Intl

12h 10m

1 stop

SOF6:00 pmSofia

Apr 12

SOF2:40 pmSofia

13h 10m

1 stop

ORD7:50 pmChicago O'Hare Intl

$578

Find similar

LOT

Apr 25

ORD9:50 pmChicago O'Hare Intl

12h 10m

1 stop

SOF6:00 pmSofia

May 9

SOF6:45 pmSofia

28h 25m

2 stops

ORD3:10 pmChicago O'Hare Intl

$585

Find similar

LOT

Feb 8

ORD9:55 pmChicago O'Hare Intl

31h 55m

2 stops

SOF1:50 pmSofia

Mar 5

SOF2:35 pmSofia

13h 25m

1 stop

ORD8:00 pmChicago O'Hare Intl

$589

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 3/4

11:50 am-3:10 pm

1 stop19h 20m

Sofia

Sun 3/8

4:00 pm-11:05 am

1 stop26h 05m

$551

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 1/22

8:20 pm-8:50 pm

1 stop16h 30m

Sofia

Sat 2/14

9:35 am-6:25 pm

1 stop16h 50m

$557

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 1/15

9:05 pm-10:45 pm

2 stops17h 40m

Sofia

Fri 2/13

6:05 am-2:10 pm

1 stop16h 05m

$560

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 1/15

9:50 pm-10:45 pm

1 stop16h 55m

Sofia

Fri 2/13

6:05 am-2:10 pm

1 stop16h 05m

$562

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 5/4

7:50 pm-3:00 pm

1 stop35h 10m

Sofia

Mon 5/11

9:35 am-6:15 pm

1 stop16h 40m

$563

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 2/10

9:05 pm-11:50 am

2 stops30h 45m

Sofia

Tue 2/24

6:45 pm-2:00 pm

1 stop27h 15m

$567

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 2/14

2:00 pm-11:50 am

2 stops13h 50m

Sofia

Sat 2/28

6:25 am-3:20 pm

1 stop16h 55m

$572

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Wed 3/4

1:49 pm-2:05 pm

2 stops16h 16m

Sofia

Mon 3/9

7:00 am-5:55 pm

2 stops17h 55m

$630

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Thu 4/2

1:10 pm-2:00 pm

2 stops16h 50m

Sofia

Mon 4/6

7:00 am-4:55 pm

2 stops17h 55m

$638

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Fri 3/6

1:49 pm-1:55 pm

2 stops16h 06m

Sofia

Mon 3/9

7:00 am-5:55 pm

2 stops17h 55m

$994

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 $565, 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 $587.

What is the cheapest day to depart on your flight to Sofia?

According to our data, Thursday is the cheapest day to fly to Sofia from Chicago. The lowest ticket price found for a Thursday departure recently was $871. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Chicago to Sofia on a Saturday will generally be more expensive and average around $1,039. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Sofia?

In the morning is the cheapest time of day to fly from Chicago to Sofia when you can find flight prices for as low as $801. Flying to Sofia in the morning is an ideal time because this is during off-peak travel hours. At noon is when there is more demand to fly to Sofia, so prices are often more expensive at around $1,145 per ticket.

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 $753 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 $716 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 December 2025, prices for Chicago to Sofia flights are approximately 8% 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 45m
Direct flights	None

The fastest flight from Chicago to Sofia takes 12h 45m

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 45m.
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 December 2025, there are 10 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 26% of all bookings. The subsequent popular airlines are Lufthansa at 26%, LOT at 18%, 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
Turkish Airlines	PriceFrom $514	Free Cancellation	Rating 7.3 4,111 reviews	Search Turkish Airlines flights
KLM	PriceFrom $569	Free Cancellation	Rating 7.7 1,434 reviews	Search KLM flights
United Airlines	PriceFrom $585	Free Cancellation	Rating 7.4 9,105 reviews	Search United Airlines flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.4 1,513 reviews	Search Air France flights
LOT	PriceFrom $587	Free Cancellation	Rating 7.5 1,152 reviews	Search LOT flights
Lufthansa	PriceFrom $588	Free Cancellation	Rating 6.8 7,649 reviews	Search Lufthansa flights
SWISS	PriceFrom $593	Free Cancellation	Rating 7.5 1,817 reviews	Search SWISS flights
Austrian Airlines	PriceFrom $606	Free Cancellation	Rating 7.6 880 reviews	Search Austrian Airlines flights
British Airways	PriceFrom $611	Free Cancellation	Rating 6.7 7,605 reviews	Search British Airways flights
Air Serbia	PriceFrom $631	Free Cancellation	Rating 6.2 210 reviews	Search Air Serbia 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.

Start using Trips

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Cheap flights from Chicago to Sofia from $239

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 2/10. 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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Big names and deals

Filter for what you want

Filter for what you want

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Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Chicago to Sofia

Cheap round-trip flights

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Cheap last minute flights

KLM flights from Chicago to Sofia

Our best KLM deals on Chicago to Sofia flight tickets

LOT flights from Chicago to Sofia

Our best LOT deals on Chicago to Sofia flight tickets

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Use the filters below to find and compare flights from Chicago to Sofia that are best for you.

See travel insights to Sofia from

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?

What is the cheapest day to depart on your flight to Sofia?

What is the cheapest time of day to depart on your flight 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 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 December 2025, prices for Chicago to Sofia flights are approximately 8% cheaper 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: 34% 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 $706.

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 07m.

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

Warsaw (WAW) has the shortest average layover time for this route: 1h 42m.

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

Airlines are sorted and displayed according to clicks in the past 7 days on momondo