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Cheap flights from Chicago O'Hare Intl Airport to Sofia from $274

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 O'Hare Intl Airport to Sofia departing on 2/15. 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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Find the cheapest flights from Chicago O'Hare Intl Airport to Sofia

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
9:50 pm - 6:20 pm
ORD
-
SOF
12h 30m
1 stop
United Airlines Logo
6:00 am - 11:10 am
SOF
-
ORD
37h 10m
2 stops
$515United Airlines
Sun, Feb 8 - Thu, Mar 5
United Airlines Logo
3:35 pm - 6:20 pm
ORD
-
SOF
18h 45m
2 stops
United Airlines Logo
6:20 am - 12:55 pm
SOF
-
ORD
14h 35m
1 stop
$516United Airlines
Tue, Feb 3 - Wed, Apr 1
Multiple Airlines Logo
3:35 pm - 6:20 pm
ORD
-
SOF
18h 45m
2 stops
Multiple Airlines Logo
3:00 pm - 5:20 pm
SOF
-
ORD
33h 20m
1 stop
$517Multiple Airlines
Wed, Mar 4 - Mon, Mar 9
United Airlines Logo
1:00 pm - 1:00 pm
ORD
-
SOF
16h 00m
2 stops
United Airlines Logo
6:00 am - 11:10 am
SOF
-
ORD
37h 10m
2 stops
$519United Airlines
Sun, Feb 8 - Thu, Mar 5
United Airlines Logo
6:00 pm - 1:15 pm
ORD
-
SOF
11h 15m
1 stop
United Airlines Logo
1:50 pm - 11:43 pm
SOF
-
ORD
17h 53m
2 stops
$521United Airlines
Mon, Feb 9 - Wed, Apr 1
LOT Logo
9:50 pm - 6:00 pm
ORD
-
SOF
12h 10m
1 stop
LOT Logo
5:25 am - 7:50 pm
SOF
-
ORD
22h 25m
1 stop
$522LOT
Fri, Apr 3 - Sat, Apr 18
Turkish Airlines Logo
11:50 am - 3:10 pm
ORD
-
SOF
19h 20m
1 stop
Turkish Airlines Logo
4:00 pm - 11:05 am
SOF
-
ORD
26h 05m
1 stop
$523Turkish Airlines
Sun, Feb 1 - Sun, Mar 22
United Airlines Logo
12:00 pm - 1:00 pm
ORD
-
SOF
17h 00m
2 stops
United Airlines Logo
6:00 am - 3:10 pm
SOF
-
ORD
17h 10m
2 stops
$524United Airlines
Sun, Feb 8 - Thu, Mar 5
British Airways Logo
7:49 pm - 4:20 pm
ORD
-
SOF
36h 31m
2 stops
British Airways Logo
9:25 pm - 3:55 pm
SOF
-
ORD
26h 30m
1 stop
$525British Airways
Sat, Feb 7 - Wed, Apr 1
Turkish Airlines Logo
11:50 am - 3:10 pm
ORD
-
SOF
19h 20m
1 stop
Turkish Airlines Logo
9:35 am - 6:15 pm
SOF
-
ORD
16h 40m
1 stop
$526Turkish Airlines
Fri, Mar 6 - Sun, Sep 6

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
Apr 3
ORD9:50 pmChicago O'Hare Intl
12h 10m
1 stop
SOF6:00 pmSofia
Apr 18
SOF5:25 amSofia
22h 25m
1 stop
ORD7:50 pmChicago O'Hare Intl
$522
LOT
Feb 13
ORD9:55 pmChicago O'Hare Intl
31h 55m
1 stop
SOF1:50 pmSofia
Feb 23
SOF6:35 pmSofia
33h 25m
1 stop
ORD8:00 pmChicago O'Hare Intl
$546
LOT
Mar 4
ORD9:55 pmChicago O'Hare Intl
31h 55m
1 stop
SOF1:50 pmSofia
Mar 8
SOF2:35 pmSofia
37h 20m
2 stops
ORD8:55 pmChicago O'Hare Intl
$547

SWISS flights from Chicago O'Hare Intl Airport to Sofia

Our best SWISS deals on Chicago O'Hare Intl Airport to Sofia flight tickets
SWISS
May 11
ORD2:20 pmChicago O'Hare Intl
13h 55m
1 stop
SOF12:15 pmSofia
Jun 15
SOF3:45 pmSofia
28h 50m
1 stop
ORD12:35 pmChicago O'Hare Intl
$558
SWISS
May 10
ORD7:05 pmChicago O'Hare Intl
33h 10m
1 stop
SOF12:15 pmSofia
Jun 16
SOF1:05 pmSofia
31h 30m
1 stop
ORD12:35 pmChicago O'Hare Intl
$570
SWISS
Feb 1
ORD6:15 pmChicago O'Hare Intl
85h 00m
3 stops
SOF3:15 pmSofia
Feb 17
SOF2:00 pmSofia
34h 20m
2 stops
ORD4:20 pmChicago O'Hare Intl
$775

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 21, 2026.
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

Sun 2/8

9:50 pm-6:20 pm

1 stop12h 30m

Sofia

Thu 3/5

6:00 am-11:10 am

2 stops37h 10m

$515

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 2/3

3:35 pm-6:20 pm

2 stops18h 45m

Sofia

Wed 4/1

6:20 am-12:55 pm

1 stop14h 35m

$516

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 3/4

3:35 pm-6:20 pm

2 stops18h 45m

Sofia

Mon 3/9

3:00 pm-5:20 pm

1 stop33h 20m

$517

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 2/8

1:00 pm-1:00 pm

2 stops16h 00m

Sofia

Thu 3/5

6:00 am-11:10 am

2 stops37h 10m

$519

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 2/9

6:00 pm-1:15 pm

1 stop11h 15m

Sofia

Wed 4/1

1:50 pm-11:43 pm

2 stops17h 53m

$521

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 4/3

9:50 pm-6:00 pm

1 stop12h 10m

Sofia

Sat 4/18

5:25 am-7:50 pm

1 stop22h 25m

$522

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 2/1

11:50 am-3:10 pm

1 stop19h 20m

Sofia

Sun 3/22

4:00 pm-11:05 am

1 stop26h 05m

$523

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 2/8

12:00 pm-1:00 pm

2 stops17h 00m

Sofia

Thu 3/5

6:00 am-3:10 pm

2 stops17h 10m

$524

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sat 2/7

7:49 pm-4:20 pm

2 stops36h 31m

Sofia

Wed 4/1

9:25 pm-3:55 pm

1 stop26h 30m

$525

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 3/6

11:50 am-3:10 pm

1 stop19h 20m

Sofia

Sun 9/6

9:35 am-6:15 pm

1 stop16h 40m

$526

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

See travel insights to Sofia from

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

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 $633, 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 $634.

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 $750 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 $714 on momondo.

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

As of January 2026, prices for Chicago O'Hare Intl Airport to Sofia flights are approximately 19% 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?

  • 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?

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 AirlinesPriceFrom $519Free CancellationRating
7.3
4,200 reviews
Search Turkish Airlines flights
KLMPriceFrom $533Free CancellationRating
7.7
1,442 reviews
Search KLM flights
United AirlinesPriceFrom $576Free CancellationRating
7.4
9,191 reviews
Search United Airlines flights
Air FrancePriceFrom $585Free CancellationRating
7.4
1,523 reviews
Search Air France flights
LufthansaPriceFrom $587Free CancellationRating
6.8
7,738 reviews
Search Lufthansa flights
LOTPriceFrom $589Free CancellationRating
7.5
1,174 reviews
Search LOT flights
SWISSPriceFrom $593Free CancellationRating
7.5
1,855 reviews
Search SWISS flights
Austrian AirlinesPriceFrom $606Free CancellationRating
7.6
894 reviews
Search Austrian Airlines flights
British AirwaysPriceFrom $611Free CancellationRating
6.7
7,689 reviews
Search British Airways flights
Air SerbiaPriceFrom $632Free CancellationRating
6.1
213 reviews
Search Air Serbia flights

Traveling to a place near Sofia?

Book flights to Sofia if you plan to visit one of these locations
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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Fly your favorite airline to Sofia

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Lufthansa
Turkish Airlines
LOT
United Airlines
Austrian Airlines
SWISS
Air Serbia
KLM
British Airways
Air France
JetBlue