What is the cheapest airline that flies from Chicago O'Hare Intl to Sofia?

Turkish Airlines is the most popular carrier operating from Chicago O'Hare Intl to Sofia

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 21m.

What airlines fly to Sofia?

Turkish Airlines, Lufthansa and LOT are the top three most popular airlines that fly to Sofia from Chicago O'Hare Intl Airport according to our data. Turkish Airlines is the first choice among our users, with 32% 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 airport is the most popular layover for flights between Chicago O'Hare Intl Airport and Sofia?

Istanbul (IST) was the most common stop: 30% of momondo users choosing 1-stop flights on this route connected there.

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: 11h 56m.

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

Flights via Istanbul (IST) offer the lowest average round-trip price of $774.

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 August 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.

$310 Cheap Flights from Chicago O'Hare Intl Airport to Sofia in 2026

Discover deals from 900+ travel sites with momondo.

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 - 3:00 pm-

34h 50m

1:05 pm - 9:40 am-

28h 35m

$760Turkish Airlines

Wed, Oct 7 - Sun, Oct 18

9:50 pm - 6:00 pm-

12h 10m

6:45 pm - 7:50 pm-

33h 05m

$768LOT

Sun, Sep 6 - Tue, Sep 22

9:50 pm - 1:55 pm-

32h 05m

6:45 pm - 7:50 pm-

33h 05m

$768LOT

Thu, Sep 3 - Thu, Sep 24

7:05 am - 1:25 pm-

22h 20m

6:25 am - 2:52 pm-

16h 27m

$768Multiple Airlines

Thu, Dec 31 - Thu, Jan 14

1:55 pm - 1:25 pm-

16h 30m

6:25 am - 2:52 pm-

16h 27m

$768Multiple Airlines

Thu, Oct 29 - Thu, Nov 12

8:10 pm - 8:20 pm-

16h 10m

9:35 am - 9:40 am-

32h 05m

$769Turkish Airlines

Sun, Sep 13 - Sat, Oct 10

6:00 pm - 1:15 pm-

11h 15m

6:25 am - 3:20 pm-

16h 55m

$773United Airlines

Wed, Jan 27 - Sun, Jan 31

6:00 pm - 1:15 pm-

11h 15m

6:25 am - 3:20 pm-

16h 55m

$774United Airlines

Wed, Jan 27 - Sun, Jan 31

9:50 pm - 4:20 pm-

34h 30m

5:15 pm - 1:45 pm-

28h 30m

$778British Airways

Sat, Jan 30 - Mon, Feb 15

5:00 pm - 7:20 pm-

18h 20m

5:15 pm - 1:45 pm-

28h 30m

$781British Airways

Sun, Oct 18 - Mon, Nov 2

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British Airways flights from Chicago O'Hare Intl Airport to Sofia

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

British Airways

Oct 20

ORD5:00 pmChicago O'Hare Intl

19h 30m

1 stop

SOF8:30 pmSofia

Nov 2

SOF5:15 pmSofia

33h 30m

1 stop

ORD6:45 pmChicago O'Hare Intl

$781

British Airways

Sep 13

ORD7:05 pmChicago O'Hare Intl

16h 15m

1 stop

SOF7:20 pmSofia

Nov 9

SOF5:15 pmSofia

31h 42m

2 stops

ORD4:57 pmChicago O'Hare Intl

$792

British Airways

Sep 13

ORD1:35 pmChicago O'Hare Intl

21h 45m

2 stops

SOF7:20 pmSofia

Nov 9

SOF5:15 pmSofia

31h 42m

2 stops

ORD4:57 pmChicago O'Hare Intl

$798

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

Sep 13

ORD9:50 pmChicago O'Hare Intl

32h 00m

1 stop

SOF1:50 pmSofia

Oct 10

SOF6:45 pmSofia

28h 25m

1 stop

ORD3:10 pmChicago O'Hare Intl

$762

LOT

Sep 3

ORD9:50 pmChicago O'Hare Intl

32h 05m

1 stop

SOF1:55 pmSofia

Sep 24

SOF6:45 pmSofia

33h 05m

1 stop

ORD7:50 pmChicago O'Hare Intl

$768

LOT

Oct 4

ORD9:50 pmChicago O'Hare Intl

32h 00m

1 stop

SOF1:50 pmSofia

Feb 25

SOF6:35 pmSofia

33h 20m

1 stop

ORD7:55 pmChicago O'Hare Intl

$769

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

Cheapest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 10/7

8:10 pm-3:00 pm

1 stop34h 50m

Sofia

Sun 10/18

1:05 pm-9:40 am

1 stop28h 35m

$760

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 9/6

9:50 pm-6:00 pm

1 stop12h 10m

Sofia

Tue 9/22

6:45 pm-7:50 pm

1 stop33h 05m

$768

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 9/3

9:50 pm-1:55 pm

1 stop32h 05m

Sofia

Thu 9/24

6:45 pm-7:50 pm

1 stop33h 05m

$768

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 12/31

7:05 am-1:25 pm

2 stops22h 20m

Sofia

Thu 1/14

6:25 am-2:52 pm

2 stops16h 27m

$768

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 10/29

1:55 pm-1:25 pm

2 stops16h 30m

Sofia

Thu 11/12

6:25 am-2:52 pm

2 stops16h 27m

$768

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 9/13

8:10 pm-8:20 pm

1 stop16h 10m

Sofia

Sat 10/10

9:35 am-9:40 am

1 stop32h 05m

$769

Quickest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 1/27

6:00 pm-1:15 pm

1 stop11h 15m

Sofia

Sun 1/31

6:25 am-3:20 pm

1 stop16h 55m

$773

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 1/27

6:00 pm-1:15 pm

1 stop11h 15m

Sofia

Sun 1/31

6:25 am-3:20 pm

1 stop16h 55m

$774

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 1/30

9:50 pm-4:20 pm

1 stop34h 30m

Sofia

Mon 2/15

5:15 pm-1:45 pm

1 stop28h 30m

$778

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 10/18

5:00 pm-7:20 pm

1 stop18h 20m

Sofia

Mon 11/2

5:15 pm-1:45 pm

1 stop28h 30m

$781

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?

Prices are currently typical for flights on this route.

Typical prices usually range from $685 to $900.
The lowest price recently found on this route was $760.

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 $561, 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 February instead. Flights to Sofia in February, while not as cheap as those in January, still average around $595.

How far in advance should I book a flight from Chicago O'Hare Intl Airport 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 $783 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 $734 on momondo.

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

As of August 2026, prices for Chicago O'Hare Intl Airport to Sofia flights are approximately 43% cheaper 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	14h 35m
Direct flights	None

The fastest flight from Chicago O'Hare Intl Airport to Sofia takes 14h 35m

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

Frequently asked questions about flying from Chicago O'Hare Intl Airport to Sofia

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 14h 35m.
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 August 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 Turkish Airlines, representing 26% of all bookings. The subsequent popular airlines are Lufthansa at 26%, LOT at 18%, and United Airlines at 11%.

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
Turkish Airlines	PriceFrom $523	Free Cancellation	Rating 7.4 4,464 reviews	Search Turkish Airlines flights
LOT	PriceFrom $579	Free Cancellation	Rating 7.6 1,212 reviews	Search LOT flights
United Airlines	PriceFrom $583	Free Cancellation	Rating 7.4 10,059 reviews	Search United Airlines flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.5 1,632 reviews	Search Air France flights
SWISS	PriceFrom $594	Free Cancellation	Rating 7.5 2,025 reviews	Search SWISS flights
Lufthansa	PriceFrom $608	Free Cancellation	Rating 6.8 8,177 reviews	Search Lufthansa flights
British Airways	PriceFrom $609	Free Cancellation	Rating 6.7 8,147 reviews	Search British Airways flights
KLM	PriceFrom $614	Free Cancellation	Rating 7.8 1,552 reviews	Search KLM flights
Austrian Airlines	PriceFrom $701	Free Cancellation	Rating 7.6 951 reviews	Search Austrian Airlines flights
Air Serbia	PriceFrom $703	Free Cancellation	Rating 6.2 233 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?

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.

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Cheap flights from Chicago O'Hare Intl Airport to Sofia from $310

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British Airways flights from Chicago O'Hare Intl Airport to Sofia

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

LOT flights from Chicago O'Hare Intl Airport to Sofia

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

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See travel insights to Sofia from

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to Sofia

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?

How far in advance should I book a flight from Chicago O'Hare Intl Airport to Sofia?

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

What is the cheapest airline that flies from Chicago O'Hare Intl to Sofia?

What airlines fly to Sofia?

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

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

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

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

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

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

Fastest flight time

Direct flights

Frequently asked questions about flying from Chicago O'Hare Intl Airport to Sofia

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

Traveling to a place near Sofia?

Why use momondo?

An easier way to manage your Sofia trip

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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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