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Cheap flights from Sofia to Chicago from $344

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Sofia to Chicago departing on 5/17. 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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0 bags

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Find the cheapest flights from Sofia to Chicago

Cheap round-trip flights

Enter your travel dates to find the best prices.
LOT Logo
2:35 pm - 7:50 pm
SOF
-
ORD
13h 15m
1 stop
LOT Logo
9:50 pm - 6:00 pm
ORD
-
SOF
12h 10m
1 stop
$656LOT
Sun, Apr 5 - Sat, Apr 18
LOT Logo
2:35 pm - 7:50 pm
SOF
-
ORD
13h 15m
1 stop
LOT Logo
9:50 pm - 6:00 pm
ORD
-
SOF
12h 10m
1 stop
$667LOT
Sun, Apr 5 - Sat, Apr 18
LOT Logo
5:20 am - 7:50 pm
SOF
-
ORD
22h 30m
1 stop
LOT Logo
5:10 pm - 2:00 am
ORD
-
SOF
24h 50m
1 stop
$669LOT
Thu, Apr 23 - Sat, Aug 29
LOT Logo
6:45 pm - 3:10 pm
SOF
-
ORD
52h 25m
2 stops
LOT Logo
9:50 pm - 1:50 pm
ORD
-
SOF
32h 00m
1 stop
$674LOT
Fri, Apr 3 - Fri, Apr 10
LOT Logo
5:20 am - 7:50 pm
SOF
-
ORD
22h 30m
2 stops
LOT Logo
9:50 pm - 6:00 pm
ORD
-
SOF
12h 10m
1 stop
$679LOT
Fri, Apr 10 - Fri, Apr 17
LOT Logo
6:45 pm - 7:50 pm
SOF
-
ORD
33h 05m
2 stops
LOT Logo
9:50 pm - 6:00 pm
ORD
-
SOF
12h 10m
1 stop
$684LOT
Thu, Apr 23 - Sat, Aug 22
KLM Logo
7:00 am - 5:54 pm
SOF
-
MDW
18h 54m
2 stops
KLM Logo
1:10 pm - 2:00 pm
MDW
-
SOF
16h 50m
2 stops
$807KLM
Fri, Apr 3 - Fri, Apr 10
Multiple Airlines Logo
7:00 am - 5:54 pm
SOF
-
MDW
18h 54m
2 stops
Multiple Airlines Logo
12:53 pm - 2:00 pm
MDW
-
SOF
17h 07m
2 stops
$818Multiple Airlines
Fri, Apr 10 - Fri, Apr 17
KLM Logo
7:00 am - 6:14 pm
SOF
-
MDW
19h 14m
2 stops
KLM Logo
1:22 pm - 2:00 pm
MDW
-
SOF
16h 38m
2 stops
$999KLM
Thu, May 14 - Mon, May 25
KLM Logo
7:00 am - 6:14 pm
SOF
-
MDW
19h 14m
2 stops
KLM Logo
1:22 pm - 2:00 pm
MDW
-
SOF
16h 38m
2 stops
$1,000KLM
Thu, May 14 - Mon, May 25

KLM flights from Sofia to Chicago

Our best KLM deals on Sofia to Chicago flight tickets
KLM
Feb 26
SOF7:00 amSofia
21h 44m
2 stops
ORD8:44 pmChicago O'Hare Intl
Sep 15
ORD1:30 pmChicago O'Hare Intl
16h 30m
2 stops
SOF2:00 pmSofia
$751
KLM
Mar 5
SOF7:00 amSofia
19h 01m
2 stops
ORD6:01 pmChicago O'Hare Intl
Mar 18
ORD1:37 pmChicago O'Hare Intl
17h 28m
2 stops
SOF2:05 pmSofia
$752
KLM
Feb 26
SOF7:00 amSofia
21h 44m
2 stops
ORD8:44 pmChicago O'Hare Intl
Sep 16
ORD1:30 pmChicago O'Hare Intl
16h 30m
2 stops
SOF2:00 pmSofia
$784

LOT flights from Sofia to Chicago

Our best LOT deals on Sofia to Chicago flight tickets
LOT
Apr 5
SOF2:35 pmSofia
13h 15m
1 stop
ORD7:50 pmChicago O'Hare Intl
Apr 18
ORD9:50 pmChicago O'Hare Intl
12h 10m
1 stop
SOF6:00 pmSofia
$656
LOT
Apr 5
SOF2:35 pmSofia
13h 15m
1 stop
ORD7:50 pmChicago O'Hare Intl
Apr 18
ORD9:50 pmChicago O'Hare Intl
12h 10m
1 stop
SOF6:00 pmSofia
$667
LOT
Apr 23
SOF5:20 amSofia
22h 30m
1 stop
ORD7:50 pmChicago O'Hare Intl
Aug 29
ORD5:10 pmChicago O'Hare Intl
24h 50m
1 stop
SOF2:00 amSofia
$669

momondo Fare Finder

 
Customize your flight search to find flights from Sofia to Chicago 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 February 20, 2026.
Use the filters below to find and compare flights from Sofia to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 4/5

2:35 pm-7:50 pm

1 stop13h 15m

Chicago O'Hare Intl

Sat 4/18

9:50 pm-6:00 pm

1 stop12h 10m

$656

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 4/5

2:35 pm-7:50 pm

1 stop13h 15m

Chicago O'Hare Intl

Sat 4/18

9:50 pm-6:00 pm

1 stop12h 10m

$667

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 4/23

5:20 am-7:50 pm

1 stop22h 30m

Chicago O'Hare Intl

Sat 8/29

5:10 pm-2:00 am

1 stop24h 50m

$669

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 4/3

6:45 pm-3:10 pm

2 stops52h 25m

Chicago O'Hare Intl

Fri 4/10

9:50 pm-1:50 pm

1 stop32h 00m

$674

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 4/10

5:20 am-7:50 pm

2 stops22h 30m

Chicago O'Hare Intl

Fri 4/17

9:50 pm-6:00 pm

1 stop12h 10m

$679

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 4/23

6:45 pm-7:50 pm

2 stops33h 05m

Chicago O'Hare Intl

Sat 8/22

9:50 pm-6:00 pm

1 stop12h 10m

$684

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Fri 4/3

7:00 am-5:54 pm

2 stops18h 54m

Chicago Midway

Fri 4/10

1:10 pm-2:00 pm

2 stops16h 50m

$807

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Fri 4/10

7:00 am-5:54 pm

2 stops18h 54m

Chicago Midway

Fri 4/17

12:53 pm-2:00 pm

2 stops17h 07m

$818

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Thu 5/14

7:00 am-6:14 pm

2 stops19h 14m

Chicago Midway

Mon 5/25

1:22 pm-2:00 pm

2 stops16h 38m

$999

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Thu 5/14

7:00 am-6:14 pm

2 stops19h 14m

Chicago Midway

Mon 5/25

1:22 pm-2:00 pm

2 stops16h 38m

$1,000

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 Chicago from

How to get the cheapest flight ticket from Sofia to Chicago

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 typical price of a round-trip flight between Sofia and Chicago?

What is the cheapest month to fly to Chicago?

The month of April is, on average, the cheapest month to fly to Chicago from Sofia, with most prices found around $679. If you’re not able to fly to Chicago in April, then February is your next best option. Flight prices from Sofia to Chicago during February average around $690.

How far in advance should I book a flight to Chicago?

You are more likely to see cheaper flights to Chicago from Sofia when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $742 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Sofia for as low as $667 on momondo.

How have Sofia to Chicago flight prices changed over time?

As of February 2026, prices for Sofia to Chicago flights are approximately 8% cheaper when compared to flights at the same time last year.

When to book flights from Sofia to Chicago

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

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

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

Fastest flight time

13h 45m

Direct flights

None
The fastest flight from Sofia to Chicago takes 13h 45m
There are no direct flights from Sofia to Chicago. There are no popular flight routes from Sofia to Chicago.
Search flight deals

  • How far is Sofia to Chicago by plane?

    A flight from Sofia to Chicago will travel around 5185.9 mi. 13h 45m is a normal flight duration for this route.

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

    Prices for flights from Sofia Airport to Chicago are updated daily.

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

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

    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 Sofia Airport to Chicago.

  • What documentation or ID do you need to fly to Chicago?

    The travel and health documents you'll need for your trip to Chicago may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Chicago. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Sofia to Chicago?

Best airlines flying from Sofia to Chicago

Compare and see reviews for airlines that fly from Sofia to Chicago with momondo
Airline
Rating
Free Cancellation
Price
LOTPriceFrom $596Free CancellationRating
7.5
1,181 reviews
Search LOT flights
KLMPriceFrom $621Free CancellationRating
7.7
1,457 reviews
Search KLM flights
Turkish AirlinesPriceFrom $625Free CancellationRating
7.3
4,224 reviews
Search Turkish Airlines flights
United AirlinesPriceFrom $649Free CancellationRating
7.4
9,331 reviews
Search United Airlines flights
LufthansaPriceFrom $657Free CancellationRating
6.8
7,795 reviews
Search Lufthansa flights
Austrian AirlinesPriceFrom $658Free CancellationRating
7.5
899 reviews
Search Austrian Airlines flights

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Merrillville
New Buffalo
Hammond
Benton Harbor
Saint Joseph
Portage
Lansing
Schererville
Valparaiso
Munster
Crown Point
Chesterton
Monticello
Porter
Griffith
Saint John

Why use momondo?

Why should I use momondo to find a flight deal from Sofia to Chicago?

Finding the right flight to Chicago from Sofia is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Chicago quick and easy, saving you time and money.

Can I find flights from Sofia to Chicago with flexible booking policies on momondo?

All flight searches from Sofia to Chicago on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Sofia to Chicago?

Once all potential Sofia to Chicago 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 Sofia to Chicago right now. Can momondo alert me if prices change?

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

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Find better results for your trip to the United States

Fly into one of these airports located in Chicago

Airports listed have a maximum distance of 78.5 mi from Chicago
Chicago Midway Airport
Chicago O'Hare Intl Airport
Chicago Greater Rockford Airport