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Cheap flights from Chicago O'Hare Intl Airport to Sofia from $399

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 4/22. 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.
Multiple Airlines Logo
6:30 pm - 6:50 pm
ORD
-
SOF
16h 20m2 stops
Multiple Airlines Logo
5:00 am - 5:20 pm
SOF
-
ORD
20h 20m3 stops
$557Multiple Airlines
Fri, Jan 9 - Fri, Jan 23
LOT Logo
9:55 pm - 5:50 pm
ORD
-
SOF
35h 55m2 stops
LOT Logo
2:35 pm - 8:00 pm
SOF
-
ORD
13h 25m1 stop
$558LOT
Sun, Jan 25 - Sun, Feb 8
Multiple Airlines Logo
6:30 pm - 1:30 am
ORD
-
SOF
23h 00m2 stops
Multiple Airlines Logo
7:00 am - 5:20 pm
SOF
-
ORD
18h 20m2 stops
$559Multiple Airlines
Thu, Jan 8 - Thu, Jan 22
Lufthansa Logo
9:50 pm - 10:45 pm
ORD
-
SOF
16h 55m1 stop
Lufthansa Logo
6:00 am - 3:20 pm
SOF
-
ORD
17h 20m1 stop
$561Lufthansa
Thu, Jan 8 - Thu, Jan 22
Turkish Airlines Logo
7:50 pm - 8:15 pm
ORD
-
SOF
16h 25m1 stop
Turkish Airlines Logo
3:50 pm - 9:40 am
SOF
-
ORD
25h 50m1 stop
$566Turkish Airlines
Wed, Apr 1 - Mon, Apr 6
Turkish Airlines Logo
7:50 pm - 8:15 pm
ORD
-
SOF
16h 25m1 stop
Turkish Airlines Logo
9:35 am - 9:40 am
SOF
-
ORD
32h 05m1 stop
$567Turkish Airlines
Fri, Apr 10 - Fri, Apr 24
Turkish Airlines Logo
12:50 pm - 8:50 pm
ORD
-
SOF
25h 00m1 stop
Turkish Airlines Logo
9:35 am - 11:05 am
SOF
-
ORD
32h 30m1 stop
$568Turkish Airlines
Sun, Mar 8 - Sun, Mar 22
Multiple Airlines Logo
5:50 pm - 3:30 pm
ORD
-
SOF
13h 40m2 stops
Multiple Airlines Logo
6:00 am - 3:20 pm
SOF
-
ORD
17h 20m1 stop
$570Multiple Airlines
Fri, Jan 9 - Thu, Jan 22
Lufthansa Logo
6:10 pm - 10:45 pm
ORD
-
SOF
20h 35m2 stops
Lufthansa Logo
6:05 am - 6:25 pm
SOF
-
ORD
20h 20m1 stop
$572Lufthansa
Sun, Dec 28 - Wed, Jan 14
LOT Logo
9:55 pm - 5:50 pm
ORD
-
SOF
35h 55m2 stops
LOT Logo
6:35 pm - 7:55 pm
SOF
-
ORD
33h 20m2 stops
$574LOT
Sun, Jan 25 - Sun, Feb 8

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
Jan 8
ORD9:50 pmChicago O'Hare Intl
16h 55m
1 stop
SOF10:45 pmSofia
Jan 22
SOF6:00 amSofia
17h 20m
1 stop
ORD3:20 pmChicago O'Hare Intl
$561
Find similar
Lufthansa
Dec 28
ORD6:10 pmChicago O'Hare Intl
20h 35m
2 stops
SOF10:45 pmSofia
Jan 14
SOF6:05 amSofia
20h 20m
1 stop
ORD6:25 pmChicago O'Hare Intl
$572
Find similar
Lufthansa
Mar 4
ORD9:50 pmChicago O'Hare Intl
12h 30m
1 stop
SOF6:20 pmSofia
Mar 9
SOF6:10 amSofia
19h 40m
2 stops
ORD6:50 pmChicago O'Hare Intl
$586
Find similar

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 1
ORD7:50 pmChicago O'Hare Intl
16h 25m
1 stop
SOF8:15 pmSofia
Apr 6
SOF3:50 pmSofia
25h 50m
1 stop
ORD9:40 amChicago O'Hare Intl
$566
Find similar
Turkish Airlines
Apr 10
ORD7:50 pmChicago O'Hare Intl
16h 25m
1 stop
SOF8:15 pmSofia
Apr 24
SOF9:35 amSofia
32h 05m
1 stop
ORD9:40 amChicago O'Hare Intl
$567
Find similar
Turkish Airlines
Mar 8
ORD12:50 pmChicago O'Hare Intl
25h 00m
1 stop
SOF8:50 pmSofia
Mar 22
SOF9:35 amSofia
32h 30m
1 stop
ORD11:05 amChicago O'Hare Intl
$568
Find similar

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 December 8, 2025.
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

Fri 1/9

6:30 pm-6:50 pm

2 stops16h 20m

Sofia

Fri 1/23

5:00 am-5:20 pm

3 stops20h 20m

$557

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 1/25

9:55 pm-5:50 pm

2 stops35h 55m

Sofia

Sun 2/8

2:35 pm-8:00 pm

1 stop13h 25m

$558

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 1/8

6:30 pm-1:30 am

2 stops23h 00m

Sofia

Thu 1/22

7:00 am-5:20 pm

2 stops18h 20m

$559

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Thu 1/8

9:50 pm-10:45 pm

1 stop16h 55m

Sofia

Thu 1/22

6:00 am-3:20 pm

1 stop17h 20m

$561

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Wed 4/1

7:50 pm-8:15 pm

1 stop16h 25m

Sofia

Mon 4/6

3:50 pm-9:40 am

1 stop25h 50m

$566

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 4/10

7:50 pm-8:15 pm

1 stop16h 25m

Sofia

Fri 4/24

9:35 am-9:40 am

1 stop32h 05m

$567

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 3/8

12:50 pm-8:50 pm

1 stop25h 00m

Sofia

Sun 3/22

9:35 am-11:05 am

1 stop32h 30m

$568

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Fri 1/9

5:50 pm-3:30 pm

2 stops13h 40m

Sofia

Thu 1/22

6:00 am-3:20 pm

1 stop17h 20m

$570

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 12/28

6:10 pm-10:45 pm

2 stops20h 35m

Sofia

Wed 1/14

6:05 am-6:25 pm

1 stop20h 20m

$572

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 1/25

9:55 pm-5:50 pm

2 stops35h 55m

Sofia

Sun 2/8

6:35 pm-7:55 pm

2 stops33h 20m

$574

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

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 October. Flight prices, which tend to average around $634, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of October, 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 October, still average around $639.

What is the cheapest day to depart on your flight to Sofia?

According to our data, Thursday is the cheapest day to fly to Sofia from Chicago O'Hare Intl Airport. The lowest ticket price found for a Thursday departure recently was $871. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Chicago O'Hare Intl Airport to Sofia on a Saturday will generally be more expensive and average around $1,039. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Sofia?

In the morning is the cheapest time of day to fly from Chicago O'Hare Intl Airport to Sofia when you can find flight prices for as low as $801. Flying to Sofia in the morning is an ideal time because this is during off-peak travel hours. At noon is when there is more demand to fly to Sofia, so prices are often more expensive at around $1,145 per ticket.

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 $755 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 $716 on momondo.

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

As of December 2025, 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

12h 55m

Direct flights

None
The fastest flight from Chicago O'Hare Intl Airport to Sofia takes 12h 55m
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 11h 15m.

  • 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 $509Free CancellationRating
7.3
4,084 reviews
Search Turkish Airlines flights
KLMPriceFrom $569Free CancellationRating
7.7
1,431 reviews
Search KLM flights
Air FrancePriceFrom $585Free CancellationRating
7.4
1,502 reviews
Search Air France flights
LufthansaPriceFrom $588Free CancellationRating
6.8
7,617 reviews
Search Lufthansa flights
LOTPriceFrom $589Free CancellationRating
7.5
1,143 reviews
Search LOT flights
SWISSPriceFrom $593Free CancellationRating
7.5
1,807 reviews
Search SWISS flights
United AirlinesPriceFrom $596Free CancellationRating
7.4
9,078 reviews
Search United Airlines flights
Austrian AirlinesPriceFrom $606Free CancellationRating
7.6
879 reviews
Search Austrian Airlines flights
British AirwaysPriceFrom $611Free CancellationRating
6.7
7,564 reviews
Search British Airways flights
Air SerbiaPriceFrom $634Free CancellationRating
6.2
210 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
Air Serbia
SWISS
KLM
British Airways
Air France