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Cheap flights from Chicago O'Hare Intl Airport to Sofia from $326

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 10/24. 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

Turkish Airlines Logo
11:50 am - 9:15 amORD-SOF
13h 25m1 stop
Turkish Airlines Logo
9:40 pm - 10:05 amSOF-ORD
20h 25m1 stop
$554Turkish Airlines
Find Deal
Thu, Jan 22 - Sat, Feb 14
Turkish Airlines Logo
7:50 pm - 8:25 pmORD-SOF
16h 35m1 stop
Turkish Airlines Logo
9:15 pm - 9:40 amSOF-ORD
20h 25m1 stop
$562Turkish Airlines
Find Deal
Sun, Sep 28 - Sun, Oct 12
Turkish Airlines Logo
7:50 pm - 8:25 pmORD-SOF
16h 35m1 stop
Turkish Airlines Logo
3:35 pm - 9:40 amSOF-ORD
26h 05m1 stop
$566Turkish Airlines
Find Deal
Sun, Oct 5 - Wed, Oct 15
British Airways Logo
5:10 pm - 4:20 pmORD-SOF
15h 10m1 stop
British Airways Logo
5:25 pm - 1:50 pmSOF-ORD
28h 25m1 stop
$598British Airways
Find Deal
Sun, Dec 28 - Mon, Mar 2
Lufthansa Logo
9:50 pm - 6:20 pmORD-SOF
12h 30m1 stop
Lufthansa Logo
6:10 am - 6:21 pmSOF-ORD
20h 11m2 stops
$603Lufthansa
Find Deal
Sun, Nov 16 - Fri, Mar 6
Lufthansa Logo
9:50 pm - 10:45 pmORD-SOF
16h 55m1 stop
Lufthansa Logo
6:00 am - 6:21 pmSOF-ORD
19h 21m2 stops
$605Lufthansa
Find Deal
Tue, Feb 24 - Tue, Mar 10
British Airways Logo
5:10 pm - 4:20 pmORD-SOF
15h 10m1 stop
British Airways Logo
5:25 pm - 5:42 pmSOF-ORD
32h 17m2 stops
$608British Airways
Find Deal
Sun, Dec 28 - Mon, Mar 2
United Airlines Logo
9:50 pm - 6:20 pmORD-SOF
12h 30m1 stop
United Airlines Logo
6:10 am - 7:30 pmSOF-ORD
21h 20m2 stops
$620United Airlines
Find Deal
Mon, Dec 8 - Wed, Jan 14
United Airlines Logo
3:20 pm - 1:35 pmORD-SOF
14h 15m1 stop
United Airlines Logo
6:00 am - 3:20 pmSOF-ORD
17h 20m1 stop
$624United Airlines
Find Deal
Sun, Dec 7 - Thu, Jan 15
Austrian Airlines Logo
4:20 pm - 6:00 pmORD-SOF
17h 40m1 stop
Austrian Airlines Logo
7:55 am - 6:37 pmSOF-ORD
18h 42m2 stops
$637Austrian Airlines
Find Deal
Mon, Dec 29 - Mon, Jan 12

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
Jan 22
ORD11:50 amChicago O'Hare Intl
13h 25m
1 stop
SOF9:15 amSofia
Feb 14
SOF9:40 pmSofia
20h 25m
1 stop
ORD10:05 amChicago O'Hare Intl
$554
Find similar
Turkish Airlines
Sep 28
ORD7:50 pmChicago O'Hare Intl
16h 35m
1 stop
SOF8:25 pmSofia
Oct 12
SOF9:15 pmSofia
20h 25m
1 stop
ORD9:40 amChicago O'Hare Intl
$562
Find similar
Turkish Airlines
Oct 5
ORD7:50 pmChicago O'Hare Intl
16h 35m
1 stop
SOF8:25 pmSofia
Oct 15
SOF3:35 pmSofia
26h 05m
1 stop
ORD9:40 amChicago O'Hare Intl
$566
Find similar

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

Our best United Airlines deals on Chicago O'Hare Intl Airport to Sofia flight tickets
United Airlines
Dec 8
ORD9:50 pmChicago O'Hare Intl
12h 30m
1 stop
SOF6:20 pmSofia
Jan 14
SOF6:10 amSofia
21h 20m
2 stops
ORD7:30 pmChicago O'Hare Intl
$620
Find similar
United Airlines
Dec 7
ORD3:20 pmChicago O'Hare Intl
14h 15m
1 stop
SOF1:35 pmSofia
Jan 15
SOF6:00 amSofia
17h 20m
1 stop
ORD3:20 pmChicago O'Hare Intl
$624
Find similar
United Airlines
Dec 9
ORD4:05 pmChicago O'Hare Intl
18h 15m
2 stops
SOF6:20 pmSofia
Jan 14
SOF6:10 amSofia
21h 20m
2 stops
ORD7:30 pmChicago O'Hare Intl
$625
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 August 28, 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

Thu 1/22

11:50 am-9:15 am

1 stop13h 25m

Sofia

Sat 2/14

9:40 pm-10:05 am

1 stop20h 25m

$554

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 9/28

7:50 pm-8:25 pm

1 stop16h 35m

Sofia

Sun 10/12

9:15 pm-9:40 am

1 stop20h 25m

$562

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 10/5

7:50 pm-8:25 pm

1 stop16h 35m

Sofia

Wed 10/15

3:35 pm-9:40 am

1 stop26h 05m

$566

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 12/28

5:10 pm-4:20 pm

1 stop15h 10m

Sofia

Mon 3/2

5:25 pm-1:50 pm

1 stop28h 25m

$598

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 11/16

9:50 pm-6:20 pm

1 stop12h 30m

Sofia

Fri 3/6

6:10 am-6:21 pm

2 stops20h 11m

$603

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Tue 2/24

9:50 pm-10:45 pm

1 stop16h 55m

Sofia

Tue 3/10

6:00 am-6:21 pm

2 stops19h 21m

$605

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 12/28

5:10 pm-4:20 pm

1 stop15h 10m

Sofia

Mon 3/2

5:25 pm-5:42 pm

2 stops32h 17m

$608

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 12/8

9:50 pm-6:20 pm

1 stop12h 30m

Sofia

Wed 1/14

6:10 am-7:30 pm

2 stops21h 20m

$620

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Sun 12/7

3:20 pm-1:35 pm

1 stop14h 15m

Sofia

Thu 1/15

6:00 am-3:20 pm

1 stop17h 20m

$624

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

Mon 12/29

4:20 pm-6:00 pm

1 stop17h 40m

Sofia

Mon 1/12

7:55 am-6:37 pm

2 stops18h 42m

$637

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 November. Flight prices, which tend to average around $578, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, 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 November, still average around $624.

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 $769 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 $726 on momondo.

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

As of August 2025, prices for Chicago O'Hare Intl Airport to Sofia flights are approximately 31% 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

Direct flights

None
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.
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  • 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 $496Free CancellationRating
7.3
3,955 reviews
Search Turkish Airlines flights
Air FrancePriceFrom $498Free CancellationRating
7.4
1,469 reviews
Search Air France flights
KLMPriceFrom $533Free CancellationRating
7.8
1,382 reviews
Search KLM flights
LOTPriceFrom $572Free CancellationRating
7.6
1,112 reviews
Search LOT flights
LufthansaPriceFrom $589Free CancellationRating
6.8
7,368 reviews
Search Lufthansa flights
SWISSPriceFrom $596Free CancellationRating
7.6
1,712 reviews
Search SWISS flights
United AirlinesPriceFrom $601Free CancellationRating
7.4
8,944 reviews
Search United Airlines flights
Austrian AirlinesPriceFrom $613Free CancellationRating
7.6
836 reviews
Search Austrian Airlines flights
British AirwaysPriceFrom $644Free CancellationRating
6.7
7,316 reviews
Search British Airways flights
Air SerbiaPriceFrom $652Free CancellationRating
6.2
198 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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