Cheap flights from Chicago to Sofia from $328

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 to Sofia departing on 9/22. 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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Cheap round-trip flights

 Logo
6:50 pm - 6:20 pmORD-SOF
15h 30m2 stops
 Logo
6:10 am - 8:00 pmSOF-ORD
21h 50m2 stops
mié., nov. 5 - mié., nov. 19
Turkish Airlines Logo
11:50 am - 3:10 pmORD-SOF
19h 20m1 stop
Turkish Airlines Logo
4:00 pm - 6:25 pmSOF-ORD
34h 25m1 stop
$546Turkish Airlines
Find Deal
jue., nov. 20 - dom., nov. 23
LOT Logo
9:55 pm - 5:50 pmORD-SOF
35h 55m2 stops
LOT Logo
6:35 pm - 8:00 pmSOF-ORD
33h 25m1 stop
$547LOT
Find Deal
dom., nov. 16 - jue., ene. 15
United Airlines Logo
9:50 pm - 6:20 pmORD-SOF
12h 30m1 stop
United Airlines Logo
6:10 am - 2:55 pmSOF-ORD
16h 45m2 stops
$551United Airlines
Find Deal
dom., nov. 2 - mié., nov. 19
United Airlines Logo
4:00 pm - 6:20 pmORD-SOF
18h 20m2 stops
United Airlines Logo
6:00 am - 8:00 pmSOF-ORD
22h 00m2 stops
$555United Airlines
Find Deal
mar., nov. 4 - jue., nov. 20
LOT Logo
9:55 pm - 1:50 pmORD-SOF
31h 55m1 stop
LOT Logo
2:35 pm - 8:00 pmSOF-ORD
13h 25m1 stop
$557LOT
Find Deal
vie., nov. 7 - sáb., nov. 22
Lufthansa Logo
9:50 pm - 6:20 pmORD-SOF
12h 30m1 stop
Lufthansa Logo
6:10 am - 1:10 pmSOF-ORD
15h 00m1 stop
$565Lufthansa
Find Deal
dom., nov. 2 - dom., nov. 16
Lufthansa Logo
10:35 pm - 10:45 pmORD-SOF
16h 10m2 stops
Lufthansa Logo
7:05 pm - 1:10 pmSOF-ORD
26h 05m2 stops
$604Lufthansa
Find Deal
dom., dic. 28 - lun., mar. 2
KLM Logo
1:50 pm - 2:05 pmMDW-SOF
16h 15m2 stops
KLM Logo
7:00 am - 6:08 pmSOF-MDW
19h 08m2 stops
$875KLM
Find Deal
lun., dic. 15 - jue., ene. 8
KLM Logo
9:35 am - 2:00 pmMDW-SOF
20h 25m2 stops
KLM Logo
7:00 am - 6:25 pmSOF-MDW
19h 25m2 stops
$882KLM
Find Deal
jue., oct. 16 - lun., oct. 20

Turkish Airlines flights from Chicago to Sofia

Our best Turkish Airlines deals on Chicago to Sofia flight tickets
Turkish Airlines
Nov 20
ORD11:50 amChicago O'Hare Intl
19h 20m
1 stop
SOF3:10 pmSofia
Nov 23
SOF4:00 pmSofia
34h 25m
1 stop
ORD6:25 pmChicago O'Hare Intl
Turkish Airlines
Nov 2
ORD8:20 pmChicago O'Hare Intl
34h 50m
1 stop
SOF3:10 pmSofia
Nov 16
SOF4:00 pmSofia
26h 05m
1 stop
ORD10:05 amChicago O'Hare Intl

LOT flights from Chicago to Sofia

Our best LOT deals on Chicago to Sofia flight tickets
LOT
Nov 16
ORD9:55 pmChicago O'Hare Intl
35h 55m
2 stops
SOF5:50 pmSofia
Jan 15
SOF6:35 pmSofia
33h 25m
1 stop
ORD8:00 pmChicago O'Hare Intl
LOT
Nov 7
ORD9:55 pmChicago O'Hare Intl
31h 55m
1 stop
SOF1:50 pmSofia
Nov 22
SOF2:35 pmSofia
13h 25m
1 stop
ORD8:00 pmChicago O'Hare Intl
LOT
Oct 5
ORD9:40 pmChicago O'Hare Intl
12h 15m
1 stop
SOF5:55 pmSofia
Nov 3
SOF6:35 pmSofia
33h 25m
1 stop
ORD8:00 pmChicago O'Hare Intl

momondo Fare Finder

 
Customize your flight search to find flights from Chicago 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 septiembre 15, 2025.
Use the filters below to find and compare flights from Chicago to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

mié. 11/5

6:50 pm-6:20 pm

2 stops15h 30m

Sofia

mié. 11/19

6:10 am-8:00 pm

2 stops21h 50m

$545

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

jue. 11/20

11:50 am-3:10 pm

1 stop19h 20m

Sofia

dom. 11/23

4:00 pm-6:25 pm

1 stop34h 25m

$546

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

dom. 11/16

9:55 pm-5:50 pm

2 stops35h 55m

Sofia

jue. 1/15

6:35 pm-8:00 pm

1 stop33h 25m

$547

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

dom. 11/2

9:50 pm-6:20 pm

1 stop12h 30m

Sofia

mié. 11/19

6:10 am-2:55 pm

2 stops16h 45m

$551

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

mar. 11/4

4:00 pm-6:20 pm

2 stops18h 20m

Sofia

jue. 11/20

6:00 am-8:00 pm

2 stops22h 00m

$555

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

vie. 11/7

9:55 pm-1:50 pm

1 stop31h 55m

Sofia

sáb. 11/22

2:35 pm-8:00 pm

1 stop13h 25m

$557

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

dom. 11/2

9:50 pm-6:20 pm

1 stop12h 30m

Sofia

dom. 11/16

6:10 am-1:10 pm

1 stop15h 00m

$565

ChicagoSofia

ORD - SOF

ORDSOF

Chicago O'Hare Intl

dom. 12/28

10:35 pm-10:45 pm

2 stops16h 10m

Sofia

lun. 3/2

7:05 pm-1:10 pm

2 stops26h 05m

$604

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

lun. 12/15

1:50 pm-2:05 pm

2 stops16h 15m

Sofia

jue. 1/8

7:00 am-6:08 pm

2 stops19h 08m

$875

ChicagoSofia

MDW - SOF

MDWSOF

Chicago Midway

jue. 10/16

9:35 am-2:00 pm

2 stops20h 25m

Sofia

lun. 10/20

7:00 am-6:25 pm

2 stops19h 25m

$882

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 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 is in February. Flight prices, which tend to average around $559, 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 during March instead. Flights to Sofia in March, while not as cheap as those in February, still average around $588.

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. 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 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 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $766 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from Chicago for as low as $737 on momondo.

Can stopping save me money on Chicago to Sofia flights?

You could potentially save up to 46% on your flight if you consider stops on a Chicago to Sofia flight.

How have Chicago to Sofia flight prices changed over time?

As of September 2025, prices for Chicago to Sofia flights are approximately 18% cheaper when compared to flights at the same time last year.

When to book flights from Chicago to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago to Sofia according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Chicago to Sofia (CHI to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Sofia

Direct flights

None
There are no direct flights from Chicago to Sofia. There are no popular flight routes from Chicago to Sofia.
  • How far is Chicago to Sofia by plane?

    A flight from Chicago to Sofia will travel around 5185.9 mi. A reasonable flight in good conditions will take 11h 15m.

  • When did momondo last update prices for flights from Chicago to Sofia Airport?

    Prices for flights from Chicago to Sofia Airport were last updated today.

  • How many operators does momondo search for flights from Chicago to Sofia Airport?

  • How old do you have to be to fly from Chicago to Sofia Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Chicago 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 to Sofia?

Best airlines flying from Chicago to Sofia

Compare and see reviews for airlines that fly from Chicago to Sofia with momondo
Airline
Rating
Free Cancellation
Price
Turkish AirlinesPriceFrom $497Free CancellationRating
7.3
3,968 reviews
Search Turkish Airlines flights
Air FrancePriceFrom $498Free CancellationRating
7.4
1,469 reviews
Search Air France flights
KLMPriceFrom $533Free CancellationRating
7.8
1,385 reviews
Search KLM flights
LOTPriceFrom $569Free CancellationRating
7.6
1,114 reviews
Search LOT flights
LufthansaPriceFrom $589Free CancellationRating
6.8
7,407 reviews
Search Lufthansa flights
SWISSPriceFrom $596Free CancellationRating
7.5
1,730 reviews
Search SWISS flights
United AirlinesPriceFrom $601Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
British AirwaysPriceFrom $613Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
Austrian AirlinesPriceFrom $613Free CancellationRating
7.6
850 reviews
Search Austrian Airlines flights
Air SerbiaPriceFrom $652Free CancellationRating
6.2
200 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?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Chicago to Sofia. momondo saves you time and could save you money on your trip.

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?

momondo helps you find the best flight between Chicago and Sofia by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Chicago to Sofia right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Sofia, momondo offers a useful price alert feature which will track prices for flights to Sofia from Chicago and alert you when they change.

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1 adult
mié. 10/15
mié. 10/22

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