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

British Airways, SWISS, and KLM are the most popular carriers operating from Chicago to Sofia

What airlines fly to Sofia?

Turkish Airlines, Lufthansa and LOT are the top three most popular airlines that fly to Sofia from Chicago according to our data. Turkish Airlines 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 layover airport has the shortest connection time from Chicago to Sofia?

Zurich (ZRH) has the shortest average layover time for this route: 1h 32m.

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

Istanbul (IST) was the most common stop: 39% 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 Zurich (ZRH) offer the lowest average round-trip price of $649.

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 15m.

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 May 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.

$329 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 $1,254 to $934. The lowest price recently found on this route was $866.

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Find the cheapest flights from Chicago to Sofia

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

3:40 pm - 6:10 pm

ORD

SOF

18h 30m

2 stops

6:55 pm - 1:20 pm

SOF

ORD

26h 25m

1 stop

$866Multiple Airlines

Sun, Aug 9 - Mon, Aug 31

3:40 pm - 6:40 pm

ORD

SOF

19h 00m

2 stops

6:10 am - 12:55 pm

SOF

ORD

14h 45m

2 stops

$867Multiple Airlines

Mon, Aug 10 - Mon, Sep 28

5:10 pm - 2:00 pm

ORD

SOF

12h 50m

1 stop

7:00 am - 4:14 pm

SOF

ORD

17h 14m

2 stops

$868Multiple Airlines

Mon, Aug 3 - Sat, Oct 3

9:40 pm - 11:15 pm

ORD

SOF

17h 35m

1 stop

6:20 am - 7:48 pm

SOF

ORD

21h 28m

2 stops

$869Multiple Airlines

Sun, Aug 2 - Sat, Sep 12

9:40 pm - 10:40 pm

ORD

SOF

17h 00m

2 stops

6:20 am - 6:37 pm

SOF

ORD

20h 17m

2 stops

$872United Airlines

Mon, Aug 3 - Sat, Aug 22

9:40 pm - 6:40 pm

ORD

SOF

13h 00m

1 stop

7:25 pm - 2:55 pm

SOF

ORD

27h 30m

2 stops

$873Lufthansa

Sat, Aug 1 - Tue, Aug 18

11:20 pm - 3:30 pm

ORD

SOF

32h 10m

1 stop

5:00 am - 2:30 pm

SOF

ORD

17h 30m

1 stop

$874Air Serbia

Sat, Aug 1 - Mon, Sep 14

11:20 pm - 3:30 pm

ORD

SOF

32h 10m

1 stop

5:00 am - 2:30 pm

SOF

ORD

17h 30m

1 stop

$875Air Serbia

Sat, Aug 1 - Mon, Aug 31

1:27 pm - 2:00 pm

MDW

SOF

16h 33m

2 stops

7:00 am - 4:27 pm

SOF

MDW

17h 27m

2 stops

$877KLM

Sun, Aug 9 - Mon, Aug 31

1:27 pm - 2:00 pm

MDW

SOF

16h 33m

2 stops

7:00 am - 6:01 pm

SOF

MDW

19h 01m

2 stops

$897KLM

Sat, Aug 8 - Mon, Aug 24

SWISS flights from Chicago to Sofia

Our best SWISS deals on Chicago to Sofia flight tickets

SWISS

Aug 20

ORD2:20 pmChicago O'Hare Intl

13h 50m

2 stops

SOF12:10 pmSofia

Sep 2

SOF11:05 amSofia

12h 50m

1 stop

ORD3:55 pmChicago O'Hare Intl

$913

SWISS

Jun 1

ORD8:20 pmChicago O'Hare Intl

30h 00m

2 stops

SOF10:20 amSofia

Jun 16

SOF1:05 pmSofia

31h 30m

1 stop

ORD12:35 pmChicago O'Hare Intl

$1,139

SWISS

Jun 2

ORD6:45 pmChicago O'Hare Intl

31h 35m

2 stops

SOF10:20 amSofia

Jun 19

SOF3:50 pmSofia

33h 25m

2 stops

ORD5:15 pmChicago O'Hare Intl

$1,161

Air Canada flights from Chicago to Sofia

Our best Air Canada deals on Chicago to Sofia flight tickets

Air Canada

Aug 21

ORD8:45 amChicago O'Hare Intl

25h 55m

2 stops

SOF6:40 pmSofia

Sep 18

SOF6:20 amSofia

21h 52m

2 stops

ORD8:12 pmChicago O'Hare Intl

$893

Air Canada

Jul 22

ORD11:05 amChicago O'Hare Intl

23h 35m

2 stops

SOF6:40 pmSofia

Oct 14

SOF6:20 amSofia

21h 52m

2 stops

ORD8:12 pmChicago O'Hare Intl

$899

Air Canada

Jul 19

ORD2:15 pmChicago O'Hare Intl

20h 25m

2 stops

SOF6:40 pmSofia

Sep 15

SOF6:10 amSofia

22h 02m

2 stops

ORD8:12 pmChicago O'Hare Intl

$904

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 8/9

3:40 pm-6:10 pm

2 stops18h 30m

Sofia

Mon 8/31

6:55 pm-1:20 pm

1 stop26h 25m

$866

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 8/10

3:40 pm-6:40 pm

2 stops19h 00m

Sofia

Mon 9/28

6:10 am-12:55 pm

2 stops14h 45m

$867

Quickest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 8/3

5:10 pm-2:00 pm

1 stop12h 50m

Sofia

Sat 10/3

7:00 am-4:14 pm

2 stops17h 14m

$868

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 8/2

9:40 pm-11:15 pm

1 stop17h 35m

Sofia

Sat 9/12

6:20 am-7:48 pm

2 stops21h 28m

$869

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 8/3

9:40 pm-10:40 pm

2 stops17h 00m

Sofia

Sat 8/22

6:20 am-6:37 pm

2 stops20h 17m

$872

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 8/1

9:40 pm-6:40 pm

1 stop13h 00m

Sofia

Tue 8/18

7:25 pm-2:55 pm

2 stops27h 30m

$873

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 8/1

11:20 pm-3:30 pm

1 stop32h 10m

Sofia

Mon 9/14

5:00 am-2:30 pm

1 stop17h 30m

$874

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 8/1

11:20 pm-3:30 pm

1 stop32h 10m

Sofia

Mon 8/31

5:00 am-2:30 pm

1 stop17h 30m

$875

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Sun 8/9

1:27 pm-2:00 pm

2 stops16h 33m

Sofia

Mon 8/31

7:00 am-4:27 pm

2 stops17h 27m

$877

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Sat 8/8

1:27 pm-2:00 pm

2 stops16h 33m

Sofia

Mon 8/24

7:00 am-6:01 pm

2 stops19h 01m

$897

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 $755 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 $707 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 May 2026, prices for Chicago to Sofia flights are approximately 9% 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	11h 20m
Direct flights	None

The fastest flight from Chicago to Sofia takes 11h 20m

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 11h 20m.
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 May 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 14%, and United Airlines at 13%.

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 1,226 reviews	Search ITA Airways flights
Turkish Airlines	PriceFrom $523	Free Cancellation	Rating 7.4 4,395 reviews	Search Turkish Airlines flights
KLM	PriceFrom $533	Free Cancellation	Rating 7.8 1,521 reviews	Search KLM flights
United Airlines	PriceFrom $563	Free Cancellation	Rating 7.4 9,751 reviews	Search United Airlines flights
SWISS	PriceFrom $564	Free Cancellation	Rating 7.5 1,958 reviews	Search SWISS flights
Austrian Airlines	PriceFrom $575	Free Cancellation	Rating 7.6 920 reviews	Search Austrian Airlines flights
LOT	PriceFrom $579	Free Cancellation	Rating 7.5 1,194 reviews	Search LOT flights
Lufthansa	PriceFrom $579	Free Cancellation	Rating 6.8 8,029 reviews	Search Lufthansa flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.4 1,591 reviews	Search Air France flights
British Airways	PriceFrom $609	Free Cancellation	Rating 6.7 8,005 reviews	Search British Airways flights

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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

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Cheap flights from Chicago to Sofia from $329

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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SWISS flights from Chicago to Sofia

Our best SWISS 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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