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

British Airways and Lufthansa are the most popular carriers 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 29m.

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 16m.

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?

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

Flights via Istanbul (IST) offer the lowest average round-trip price of $856.

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 June 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.

$328 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 $1,272 to $1,011. The lowest price recently found on this route was $881.

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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.

9:29 pm - 1:35 pm

ORD

SOF

32h 06m

2 stops

6:55 pm - 4:59 pm

SOF

ORD

30h 04m

2 stops

$881Multiple Airlines

Sat, Aug 15 - Mon, Aug 31

5:10 pm - 6:00 pm

ORD

SOF

16h 50m

2 stops

5:25 am - 7:50 pm

SOF

ORD

22h 25m

1 stop

$882LOT

Fri, Sep 11 - Fri, Sep 25

9:40 pm - 11:15 pm

ORD

SOF

17h 35m

1 stop

7:25 pm - 12:55 pm

SOF

ORD

25h 30m

2 stops

$883Lufthansa

Fri, Aug 7 - Mon, Aug 24

9:40 pm - 11:15 pm

ORD

SOF

17h 35m

1 stop

6:10 am - 2:55 pm

SOF

ORD

16h 45m

2 stops

$884United Airlines

Thu, Jul 16 - Tue, Aug 25

9:40 pm - 11:15 pm

ORD

SOF

17h 35m

1 stop

6:20 am - 12:55 pm

SOF

ORD

14h 35m

1 stop

$885United Airlines

Sun, Jul 12 - Wed, Aug 26

3:35 pm - 12:10 pm

ORD

SOF

12h 35m

1 stop

6:20 am - 12:55 pm

SOF

ORD

14h 35m

1 stop

$886United Airlines

Thu, Jul 30 - Fri, Sep 4

3:35 pm - 12:10 pm

ORD

SOF

12h 35m

1 stop

6:10 am - 12:35 pm

SOF

ORD

14h 25m

1 stop

$887United Airlines

Thu, Aug 6 - Thu, Aug 27

9:40 pm - 6:40 pm

ORD

SOF

13h 00m

1 stop

6:20 am - 7:48 pm

SOF

ORD

21h 28m

2 stops

$888Lufthansa

Sat, Aug 1 - Wed, Sep 9

5:10 pm - 1:55 pm

ORD

SOF

36h 45m

2 stops

6:45 pm - 7:50 pm

SOF

ORD

33h 05m

1 stop

$889LOT

Thu, Aug 6 - Mon, Sep 7

7:05 pm - 10:20 am

ORD

SOF

31h 15m

1 stop

1:05 pm - 12:35 pm

SOF

ORD

31h 30m

1 stop

$890SWISS

Mon, Jul 13 - Tue, Aug 25

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 11

ORD5:10 pmChicago O'Hare Intl

16h 50m

2 stops

SOF6:00 pmSofia

Sep 25

SOF5:25 amSofia

22h 25m

1 stop

ORD7:50 pmChicago O'Hare Intl

$882

LOT

Aug 6

ORD5:10 pmChicago O'Hare Intl

36h 45m

2 stops

SOF1:55 pmSofia

Sep 7

SOF6:45 pmSofia

33h 05m

1 stop

ORD7:50 pmChicago O'Hare Intl

$889

LOT

Aug 7

ORD9:50 pmChicago O'Hare Intl

12h 10m

1 stop

SOF6:00 pmSofia

Aug 22

SOF6:45 pmSofia

52h 25m

2 stops

ORD3:10 pmChicago O'Hare Intl

$929

Lufthansa flights from Chicago O'Hare Intl Airport to Sofia

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

Lufthansa

Aug 7

ORD9:40 pmChicago O'Hare Intl

17h 35m

1 stop

SOF11:15 pmSofia

Aug 24

SOF7:25 pmSofia

25h 30m

2 stops

ORD12:55 pmChicago O'Hare Intl

$883

Lufthansa

Aug 1

ORD9:40 pmChicago O'Hare Intl

13h 00m

1 stop

SOF6:40 pmSofia

Sep 9

SOF6:20 amSofia

21h 28m

2 stops

ORD7:48 pmChicago O'Hare Intl

$888

Lufthansa

Aug 1

ORD9:40 pmChicago O'Hare Intl

13h 00m

1 stop

SOF6:40 pmSofia

Oct 10

SOF6:20 amSofia

18h 38m

2 stops

ORD4:58 pmChicago O'Hare Intl

$910

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

Sat 8/15

9:29 pm-1:35 pm

2 stops32h 06m

Sofia

Mon 8/31

6:55 pm-4:59 pm

2 stops30h 04m

$881

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 9/11

5:10 pm-6:00 pm

2 stops16h 50m

Sofia

Fri 9/25

5:25 am-7:50 pm

1 stop22h 25m

$882

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 8/7

9:40 pm-11:15 pm

1 stop17h 35m

Sofia

Mon 8/24

7:25 pm-12:55 pm

2 stops25h 30m

$883

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 7/16

9:40 pm-11:15 pm

1 stop17h 35m

Sofia

Tue 8/25

6:10 am-2:55 pm

2 stops16h 45m

$884

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 7/12

9:40 pm-11:15 pm

1 stop17h 35m

Sofia

Wed 8/26

6:20 am-12:55 pm

1 stop14h 35m

$885

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 7/30

3:35 pm-12:10 pm

1 stop12h 35m

Sofia

Fri 9/4

6:20 am-12:55 pm

1 stop14h 35m

$886

Quickest round-trip

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 8/6

3:35 pm-12:10 pm

1 stop12h 35m

Sofia

Thu 8/27

6:10 am-12:35 pm

1 stop14h 25m

$887

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 8/1

9:40 pm-6:40 pm

1 stop13h 00m

Sofia

Wed 9/9

6:20 am-7:48 pm

2 stops21h 28m

$888

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 8/6

5:10 pm-1:55 pm

2 stops36h 45m

Sofia

Mon 9/7

6:45 pm-7:50 pm

1 stop33h 05m

$889

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 7/13

7:05 pm-10:20 am

1 stop31h 15m

Sofia

Tue 8/25

1:05 pm-12:35 pm

1 stop31h 30m

$890

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 February. Flight prices, which tend to average around $586, 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 O'Hare Intl Airport during January instead. Flights to Sofia in January, while not as cheap as those in February, still average around $601.

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 $757 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 $707 on momondo.

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

As of June 2026, prices for Chicago O'Hare Intl Airport to Sofia flights are approximately 7% 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	12h 35m
Direct flights	None

The fastest flight from Chicago O'Hare Intl Airport to Sofia takes 12h 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 12h 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 June 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 28% of all bookings. The subsequent popular airlines are Lufthansa at 26%, LOT at 16%, and United Airlines at 13%.

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 $508	Free Cancellation	Rating 6.7 1,242 reviews	Search ITA Airways flights
Turkish Airlines	PriceFrom $523	Free Cancellation	Rating 7.4 4,408 reviews	Search Turkish Airlines flights
KLM	PriceFrom $533	Free Cancellation	Rating 7.8 1,524 reviews	Search KLM flights
United Airlines	PriceFrom $563	Free Cancellation	Rating 7.4 9,775 reviews	Search United Airlines flights
SWISS	PriceFrom $565	Free Cancellation	Rating 7.5 1,964 reviews	Search SWISS flights
Austrian Airlines	PriceFrom $575	Free Cancellation	Rating 7.6 923 reviews	Search Austrian Airlines flights
Lufthansa	PriceFrom $578	Free Cancellation	Rating 6.8 8,036 reviews	Search Lufthansa flights
LOT	PriceFrom $579	Free Cancellation	Rating 7.5 1,198 reviews	Search LOT flights
Air France	PriceFrom $585	Free Cancellation	Rating 7.4 1,596 reviews	Search Air France flights
British Airways	PriceFrom $609	Free Cancellation	Rating 6.7 8,026 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.

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Cheap flights from Chicago O'Hare Intl Airport to Sofia from $328

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LOT flights from Chicago O'Hare Intl Airport to Sofia

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

Lufthansa flights from Chicago O'Hare Intl Airport to Sofia

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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

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

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

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

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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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