Which airport is the most popular layover for flights between Chicago O'Hare Intl Airport and Sofia?

Istanbul (IST) was the most common stop: 37% of momondo users choosing 1-stop flights on this route connected there.

What airlines fly to Sofia?

Lufthansa, Turkish Airlines and LOT are the top three most popular airlines that fly to Sofia from Chicago O'Hare Intl Airport 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 travel time from Chicago O'Hare Intl Airport to Sofia?

Flights connecting via Vienna (VIE) have the shortest average one-way travel time: 12h 07m.

Which layover airport offers the lowest fares from Chicago O'Hare Intl Airport to Sofia?

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

Which layover airport has the shortest connection time from Chicago O'Hare Intl Airport to Sofia?

Warsaw (WAW) has the shortest average layover time for this route: 1h 37m.

When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Sofia Airport?

Prices for flights from Chicago O'Hare Intl Airport to Sofia Airport refresh daily.

How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Sofia Airport?

The number of operators available for flights from Chicago O'Hare Intl Airport to Sofia Airport is 12 as of March 2026.

How old do you have to be to fly from Chicago O'Hare Intl Airport to Sofia Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago O'Hare Intl Airport 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.

$224 Cheap Flights from Chicago O'Hare Intl Airport to Sofia in 2026

Q: What is the typical price of a round-trip flight between Chicago O'Hare Intl Airport and Sofia?

Prices are currently low for flights on this route. Typical prices usually range from $592 to $890. The lowest price recently found on this route was $548.

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Find the cheapest flights from Chicago O'Hare Intl Airport to Sofia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:10 pm - 8:15 pm

ORD

SOF

16h 05m

1 stop

9:05 pm - 9:40 am

SOF

ORD

20h 35m

1 stop

$548Turkish Airlines

Wed, Apr 29 - Wed, May 13

8:10 pm - 1:15 pm

ORD

SOF

33h 05m

1 stop

3:50 pm - 9:40 am

SOF

ORD

25h 50m

1 stop

$557Turkish Airlines

Wed, Apr 15 - Wed, Apr 29

11:25 am - 8:45 am

ORD

SOF

13h 20m

1 stop

3:50 pm - 9:40 am

SOF

ORD

25h 50m

1 stop

$562Turkish Airlines

Wed, Apr 22 - Wed, May 6

8:10 pm - 8:15 pm

ORD

SOF

16h 05m

1 stop

3:50 pm - 9:40 am

SOF

ORD

25h 50m

1 stop

$569Turkish Airlines

Wed, Apr 15 - Wed, Apr 22

8:10 pm - 8:15 pm

ORD

SOF

16h 05m

1 stop

3:50 pm - 6:15 pm

SOF

ORD

34h 25m

1 stop

$570Turkish Airlines

Sun, Aug 16 - Wed, Sep 16

11:25 am - 3:00 pm

ORD

SOF

19h 35m

1 stop

9:05 pm - 6:15 pm

SOF

ORD

29h 10m

1 stop

$571Turkish Airlines

Mon, May 4 - Fri, May 15

11:25 am - 8:45 am

ORD

SOF

13h 20m

1 stop

3:50 pm - 9:40 am

SOF

ORD

25h 50m

1 stop

$572Turkish Airlines

Wed, Apr 8 - Fri, May 15

8:10 pm - 8:15 pm

ORD

SOF

16h 05m

1 stop

2:05 pm - 9:40 am

SOF

ORD

27h 35m

1 stop

$575Turkish Airlines

Thu, Jul 30 - Fri, Sep 18

8:10 pm - 3:00 pm

ORD

SOF

34h 50m

1 stop

9:35 am - 9:40 am

SOF

ORD

32h 05m

1 stop

$576Turkish Airlines

Sat, May 2 - Tue, May 12

8:10 pm - 8:45 am

ORD

SOF

28h 35m

1 stop

3:50 pm - 9:40 am

SOF

ORD

25h 50m

1 stop

$578Turkish Airlines

Sat, May 2 - Wed, May 13

Turkish Airlines flights from Chicago O'Hare Intl Airport to Sofia

Our best Turkish Airlines deals on Chicago O'Hare Intl Airport to Sofia flight tickets

Turkish Airlines

Apr 29

ORD8:10 pmChicago O'Hare Intl

16h 05m

1 stop

SOF8:15 pmSofia

May 13

SOF9:05 pmSofia

20h 35m

1 stop

ORD9:40 amChicago O'Hare Intl

$548

Turkish Airlines

Apr 15

ORD8:10 pmChicago O'Hare Intl

33h 05m

1 stop

SOF1:15 pmSofia

Apr 29

SOF3:50 pmSofia

25h 50m

1 stop

ORD9:40 amChicago O'Hare Intl

$557

Turkish Airlines

Apr 22

ORD11:25 amChicago O'Hare Intl

13h 20m

1 stop

SOF8:45 amSofia

May 6

SOF3:50 pmSofia

25h 50m

1 stop

ORD9:40 amChicago O'Hare Intl

$562

LOT flights from Chicago O'Hare Intl Airport to Sofia

Our best LOT deals on Chicago O'Hare Intl Airport to Sofia flight tickets

LOT

May 1

ORD9:50 pmChicago O'Hare Intl

12h 10m

1 stop

SOF6:00 pmSofia

May 12

SOF2:35 pmSofia

13h 15m

1 stop

ORD7:50 pmChicago O'Hare Intl

$582

LOT

Mar 16

ORD10:55 pmChicago O'Hare Intl

31h 55m

1 stop

SOF1:50 pmSofia

Mar 31

SOF6:40 pmSofia

33h 10m

1 stop

ORD7:50 pmChicago O'Hare Intl

$584

LOT

May 1

ORD9:50 pmChicago O'Hare Intl

32h 00m

1 stop

SOF1:50 pmSofia

May 13

SOF5:25 amSofia

22h 25m

1 stop

ORD7:50 pmChicago O'Hare Intl

$585

momondo Fare Finder

Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 4/29

8:10 pm-8:15 pm

1 stop16h 05m

Sofia

Wed 5/13

9:05 pm-9:40 am

1 stop20h 35m

$548

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 4/15

8:10 pm-1:15 pm

1 stop33h 05m

Sofia

Wed 4/29

3:50 pm-9:40 am

1 stop25h 50m

$557

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 4/22

11:25 am-8:45 am

1 stop13h 20m

Sofia

Wed 5/6

3:50 pm-9:40 am

1 stop25h 50m

$562

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 4/15

8:10 pm-8:15 pm

1 stop16h 05m

Sofia

Wed 4/22

3:50 pm-9:40 am

1 stop25h 50m

$569

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 8/16

8:10 pm-8:15 pm

1 stop16h 05m

Sofia

Wed 9/16

3:50 pm-6:15 pm

1 stop34h 25m

$570

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 5/4

11:25 am-3:00 pm

1 stop19h 35m

Sofia

Fri 5/15

9:05 pm-6:15 pm

1 stop29h 10m

$571

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 4/8

11:25 am-8:45 am

1 stop13h 20m

Sofia

Fri 5/15

3:50 pm-9:40 am

1 stop25h 50m

$572

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 7/30

8:10 pm-8:15 pm

1 stop16h 05m

Sofia

Fri 9/18

2:05 pm-9:40 am

1 stop27h 35m

$575

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 5/2

8:10 pm-3:00 pm

1 stop34h 50m

Sofia

Tue 5/12

9:35 am-9:40 am

1 stop32h 05m

$576

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 5/2

8:10 pm-8:45 am

1 stop28h 35m

Sofia

Wed 5/13

3:50 pm-9:40 am

1 stop25h 50m

$578

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 O'Hare Intl Airport 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 O'Hare Intl Airport and Sofia?

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Chicago O'Hare Intl Airport is in January. Flight prices, which tend to average around $606, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Sofia from Chicago O'Hare Intl Airport during October instead. Flights to Sofia in October, while not as cheap as those in January, still average around $633.

How far in advance should I book a flight to Sofia?

You are more likely to see cheaper flights to Sofia from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $739 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from Chicago O'Hare Intl Airport for as low as $709 on momondo.

How have Chicago O'Hare Intl Airport to Sofia flight prices changed over time?

As of March 2026, prices for Chicago O'Hare Intl Airport to Sofia flights are approximately 14% more expensive when compared to flights at the same time last year.

When to book flights from Chicago O'Hare Intl Airport to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago O'Hare Intl Airport to Sofia according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Chicago O'Hare Intl Airport to Sofia (ORD to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Sofia

Fastest flight time	13h 20m
Direct flights	None

The fastest flight from Chicago O'Hare Intl Airport to Sofia takes 13h 20m

There are no direct flights from Chicago O'Hare Intl Airport to Sofia. There are no popular flight routes from Chicago O'Hare Intl Airport to Sofia.

Search flight deals

How far is Chicago O'Hare Intl to Sofia by plane?
Chicago O'Hare Intl and Sofia are 5191.0 mi apart from one another. In terms of flight time, this usually takes a little over 13h 20m.
When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Sofia Airport?
Prices for flights from Chicago O'Hare Intl Airport to Sofia Airport refresh daily.
How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Sofia Airport?
The number of operators available for flights from Chicago O'Hare Intl Airport to Sofia Airport is 12 as of March 2026.
How old do you have to be to fly from Chicago O'Hare Intl Airport to Sofia Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport to Sofia?
momondo data reveals that the most frequently booked airline on the route from Chicago O'Hare Intl Airport to Sofia is Lufthansa, representing 29% of all bookings. The subsequent popular airlines are Turkish Airlines at 26%, LOT at 15%, and United Airlines at 14%.

Best airlines flying from Chicago O'Hare Intl Airport to Sofia

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Sofia with momondo

Airline	Rating	Free Cancellation	Price
ITA Airways	PriceFrom $469	Free Cancellation	Rating 6.7 1,156 reviews	Search ITA Airways flights
Turkish Airlines	PriceFrom $521	Free Cancellation	Rating 7.3 4,241 reviews	Search Turkish Airlines flights
KLM	PriceFrom $533	Free Cancellation	Rating 7.7 1,464 reviews	Search KLM flights
SWISS	PriceFrom $565	Free Cancellation	Rating 7.6 1,889 reviews	Search SWISS flights
United Airlines	PriceFrom $566	Free Cancellation	Rating 7.4 9,386 reviews	Search United Airlines flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.4 1,542 reviews	Search Air France flights
LOT	PriceFrom $586	Free Cancellation	Rating 7.5 1,182 reviews	Search LOT flights
Lufthansa	PriceFrom $586	Free Cancellation	Rating 6.8 7,823 reviews	Search Lufthansa flights
Austrian Airlines	PriceFrom $587	Free Cancellation	Rating 7.6 900 reviews	Search Austrian Airlines flights
British Airways	PriceFrom $609	Free Cancellation	Rating 6.7 7,774 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?

It is quick and easy to find Chicago to Sofia flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Sofia that suits you.

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?

Once all potential Chicago to Sofia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Chicago to Sofia flights. All you need is a valid email address and we will do the rest; it is that quick and easy.