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

Warsaw (WAW) has the shortest average layover time for this route: 1h 45m.

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.

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

KLM is the most popular carrier operating from Chicago to Sofia

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

Istanbul (IST) was the most common stop: 35% 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.

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 11 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 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.

$290 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 $538 to $638. The lowest price recently found on this route was $517.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

11:25 am - 8:15 pm

ORD

SOF

24h 50m

1 stop

3:50 pm - 9:40 am

SOF

ORD

25h 50m

1 stop

$517Turkish Airlines

Fri, Apr 17 - Tue, May 5

8:10 pm - 8:15 pm

ORD

SOF

16h 05m

1 stop

2:05 pm - 9:40 am

SOF

ORD

27h 35m

1 stop

$524Turkish Airlines

Wed, Apr 8 - Sun, Apr 19

8:10 pm - 8:15 pm

ORD

SOF

16h 05m

1 stop

3:50 pm - 6:15 pm

SOF

ORD

34h 25m

1 stop

$529Turkish Airlines

Sat, May 2 - Tue, May 12

8:20 pm - 8:50 pm

ORD

SOF

16h 30m

1 stop

4:00 pm - 6:25 pm

SOF

ORD

34h 25m

1 stop

$535Turkish Airlines

Fri, Feb 20 - Fri, Mar 6

11:50 am - 8:50 pm

ORD

SOF

25h 00m

1 stop

4:00 pm - 7:25 pm

SOF

ORD

34h 25m

1 stop

$538Turkish Airlines

Fri, Mar 6 - Mon, Mar 9

8:20 pm - 8:50 pm

ORD

SOF

16h 30m

1 stop

9:35 am - 6:25 pm

SOF

ORD

16h 50m

1 stop

$539Turkish Airlines

Thu, Feb 19 - Wed, Mar 4

1:28 pm - 2:05 pm

MDW

SOF

16h 37m

2 stops

7:00 am - 5:45 pm

SOF

MDW

18h 45m

2 stops

$627Multiple Airlines

Wed, Feb 18 - Fri, Mar 6

1:23 pm - 2:00 pm

MDW

SOF

16h 37m

2 stops

7:00 am - 5:56 pm

SOF

MDW

18h 56m

2 stops

$631KLM

Sat, Apr 25 - Sat, May 9

2:05 pm - 2:05 pm

MDW

SOF

17h 00m

2 stops

7:00 am - 5:54 pm

SOF

MDW

17h 54m

2 stops

$717KLM

Wed, Mar 18 - Wed, Mar 25

1:28 pm - 2:05 pm

MDW

SOF

16h 37m

2 stops

7:00 am - 4:54 pm

SOF

MDW

17h 54m

2 stops

$1,053KLM

Sun, Mar 1 - Sun, Mar 8

Turkish Airlines flights from Chicago to Sofia

Our best Turkish Airlines deals on Chicago to Sofia flight tickets

Turkish Airlines

Apr 17

ORD11:25 amChicago O'Hare Intl

24h 50m

1 stop

SOF8:15 pmSofia

May 5

SOF3:50 pmSofia

25h 50m

1 stop

ORD9:40 amChicago O'Hare Intl

$517

Turkish Airlines

Apr 8

ORD8:10 pmChicago O'Hare Intl

16h 05m

1 stop

SOF8:15 pmSofia

Apr 19

SOF2:05 pmSofia

27h 35m

1 stop

ORD9:40 amChicago O'Hare Intl

$524

Turkish Airlines

May 2

ORD8:10 pmChicago O'Hare Intl

16h 05m

1 stop

SOF8:15 pmSofia

May 12

SOF3:50 pmSofia

34h 25m

1 stop

ORD6:15 pmChicago O'Hare Intl

$529

Austrian Airlines flights from Chicago to Sofia

Our best Austrian Airlines deals on Chicago to Sofia flight tickets

Austrian Airlines

Feb 20

ORD1:02 pmChicago O'Hare Intl

22h 43m

2 stops

SOF7:45 pmSofia

Mar 1

SOF6:45 pmSofia

27h 15m

1 stop

ORD2:00 pmChicago O'Hare Intl

$575

Austrian Airlines

Feb 19

ORD1:02 pmChicago O'Hare Intl

14h 48m

2 stops

SOF11:50 amSofia

Mar 5

SOF6:45 pmSofia

27h 15m

1 stop

ORD2:00 pmChicago O'Hare Intl

$596

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 4/17

11:25 am-8:15 pm

1 stop24h 50m

Sofia

Tue 5/5

3:50 pm-9:40 am

1 stop25h 50m

$517

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 4/8

8:10 pm-8:15 pm

1 stop16h 05m

Sofia

Sun 4/19

2:05 pm-9:40 am

1 stop27h 35m

$524

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 5/2

8:10 pm-8:15 pm

1 stop16h 05m

Sofia

Tue 5/12

3:50 pm-6:15 pm

1 stop34h 25m

$529

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 2/20

8:20 pm-8:50 pm

1 stop16h 30m

Sofia

Fri 3/6

4:00 pm-6:25 pm

1 stop34h 25m

$535

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 3/6

11:50 am-8:50 pm

1 stop25h 00m

Sofia

Mon 3/9

4:00 pm-7:25 pm

1 stop34h 25m

$538

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 2/19

8:20 pm-8:50 pm

1 stop16h 30m

Sofia

Wed 3/4

9:35 am-6:25 pm

1 stop16h 50m

$539

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Wed 2/18

1:28 pm-2:05 pm

2 stops16h 37m

Sofia

Fri 3/6

7:00 am-5:45 pm

2 stops18h 45m

$627

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Sat 4/25

1:23 pm-2:00 pm

2 stops16h 37m

Sofia

Sat 5/9

7:00 am-5:56 pm

2 stops18h 56m

$631

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Wed 3/18

2:05 pm-2:05 pm

2 stops17h 00m

Sofia

Wed 3/25

7:00 am-5:54 pm

2 stops17h 54m

$717

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

Sun 3/1

1:28 pm-2:05 pm

2 stops16h 37m

Sofia

Sun 3/8

7:00 am-4:54 pm

2 stops17h 54m

$1,053

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 $582, 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 $589.

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 $747 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 $711 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 1% 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
Turkish Airlines	PriceFrom $519	Free Cancellation	Rating 7.3 4,209 reviews	Search Turkish Airlines flights
KLM	PriceFrom $533	Free Cancellation	Rating 7.7 1,448 reviews	Search KLM flights
United Airlines	PriceFrom $568	Free Cancellation	Rating 7.4 9,229 reviews	Search United Airlines 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 7,758 reviews	Search Lufthansa flights
LOT	PriceFrom $593	Free Cancellation	Rating 7.5 1,178 reviews	Search LOT flights
SWISS	PriceFrom $593	Free Cancellation	Rating 7.6 1,864 reviews	Search SWISS flights
Austrian Airlines	PriceFrom $606	Free Cancellation	Rating 7.5 896 reviews	Search Austrian Airlines flights
British Airways	PriceFrom $611	Free Cancellation	Rating 6.7 7,710 reviews	Search British Airways flights
Air Serbia	PriceFrom $652	Free Cancellation	Rating 6.1 214 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.