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$371+ Cheap flights from Sofia (SOF) to Chicago (CHI)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — CHI
Aug 1 — Aug 81
Sat 8/1
Sat 8/8
1 adult, Economy
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Cheap flight deals from Sofia to Chicago

Cheapest flights from Sofia to Chicago
Explore the most affordable flight options available from Sofia to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2026.

This oojo deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:45 pm
SOF
-
ORD
1 stop28h 25m
LOT
Sat 9/199:50 pm
ORD
-
SOF
1 stop12h 10m
LOT
Deal found 6/30$695
This oojo deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:45 pm
SOF
-
ORD
1 stop33h 05m
LOT
Wed 9/309:50 pm
ORD
-
SOF
1 stop12h 10m
LOT
Deal found 7/1$697
This oojo deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:45 pm
SOF
-
ORD
1 stop33h 05m
LOT
Thu 11/199:50 pm
ORD
-
SOF
1 stop12h 00m
LOT
Deal found 6/28$751
This Booking.com deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:45 pm
SOF
-
ORD
2 stops52h 25m
LOT
Mon 10/199:50 pm
ORD
-
SOF
1 stop32h 05m
LOT
Deal found 6/29$763
This oojo deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/312:35 pm
SOF
-
ORD
1 stop32h 35m
LOT
Wed 11/259:50 pm
ORD
-
SOF
1 stop32h 00m
LOT
Deal found 6/29$766
This oojo deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/176:45 pm
SOF
-
ORD
2 stops28h 25m
LOT
Sat 10/39:50 pm
ORD
-
SOF
1 stop12h 10m
LOT
Deal found 6/30$768
This KLM deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:00 am
SOF
-
MDW
2 stops19h 33m
KLM
Sat 10/31:19 pm
MDW
-
SOF
2 stops16h 41m
KLM
Deal found 6/29$790
This KLM deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/267:00 am
SOF
-
MDW
2 stops19h 18m
Multiple Airlines
Mon 8/241:25 pm
MDW
-
SOF
2 stops16h 35m
Multiple Airlines
Deal found 6/30$952
This Air France deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/27:00 am
SOF
-
MDW
2 stops19h 31m
Multiple Airlines
Fri 9/2512:30 pm
MDW
-
SOF
2 stops17h 30m
Multiple Airlines
Deal found 6/29$973
This KLM deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/217:00 am
SOF
-
MDW
2 stops19h 25m
Multiple Airlines
Tue 7/281:18 pm
MDW
-
SOF
2 stops16h 42m
Multiple Airlines
Deal found 6/28$1,024
This KLM deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/157:00 am
SOF
-
MDW
2 stops19h 19m
KLM
Thu 11/191:00 pm
MDW
-
SOF
2 stops17h 05m
KLM
Deal found 6/28$1,044
This KLM deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:00 am
SOF
-
MDW
2 stops19h 01m
KLM
Wed 9/161:19 pm
MDW
-
SOF
2 stops16h 41m
KLM
Deal found 6/30$1,062

Find flight deals from Sofia to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from Sofia (SOF) to Chicago (CHI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$695
(oojo)

One-way from

$371
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$835
Provider with most accurate pricing for Sofia-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sofia-Chicago (CHI) flights.
Search Deals
From Sofia to Chicago (CHI)
Search Deals
One-way flight from Sofia to Chicago (CHI)
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($4 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated July 2, 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

Cheapest round-trip

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 9/17

6:30 am-2:55 pm

1 stop16h 25m

Chicago O'Hare Intl

Sat 10/3

6:00 pm-11:15 pm

1 stop21h 15m

$775

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 9/3

6:30 am-12:55 pm

1 stop14h 25m

Chicago O'Hare Intl

Wed 11/25

11:56 am-1:15 pm

2 stops17h 19m

$776
Quickest round-trip

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 9/15

6:10 am-12:55 pm

1 stop14h 45m

Chicago O'Hare Intl

Thu 11/19

1:19 pm-11:50 am

2 stops14h 31m

$786

SofiaChicago

SOF - MDW

SOFMDW

Sofia

Thu 9/17

7:00 am-6:33 pm

2 stops19h 33m

Chicago Midway

Sat 10/3

1:19 pm-2:00 pm

2 stops16h 41m

$790

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 7/21

3:50 pm-9:40 am

1 stop25h 50m

Chicago O'Hare Intl

Sat 10/31

12:45 pm-11:05 am

1 stop15h 20m

$812

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 7/15

9:10 pm-9:40 am

1 stop20h 30m

Chicago O'Hare Intl

Thu 11/12

11:45 am-3:10 pm

1 stop19h 25m

$814

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 7/13

6:20 am-7:55 pm

1 stop21h 35m

Chicago O'Hare Intl

Wed 7/29

6:00 pm-11:15 pm

1 stop21h 15m

$832

SofiaChicago

SOF - ORD

SOFORD

Sofia

Fri 7/24

6:20 am-11:00 am

1 stop12h 40m

Chicago O'Hare Intl

Sat 8/8

6:00 pm-6:40 pm

1 stop16h 40m

$832

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 7/15

1:50 pm-7:55 pm

1 stop14h 05m

Chicago O'Hare Intl

Thu 11/12

9:50 pm-10:45 pm

1 stop16h 55m

$832

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 7/21

6:10 am-11:00 am

1 stop12h 50m

Chicago O'Hare Intl

Tue 7/28

6:00 pm-11:15 pm

1 stop21h 15m

$834

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 39 resultsSorted by cheapest first
1
2
3
4

Compare providers for flights from Sofia to Chicago

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Sofia to Chicago in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Sofia-Chicago flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sofia-Chicago flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sofia-Chicago flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sofia-Chicago flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Sofia-Chicago flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Sofia to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Sofia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Sofia to Chicago

What is the cheapest month to book a flight from Sofia to Chicago?

Currently, January is the cheapest month in which you can book a flight from Sofia to Chicago (average of $388). Flying from Sofia to Chicago in July is currently the most expensive (average of $674). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Sofia to Chicago?

What’s the top layover airport for flights from Sofia to Chicago?

Share of 1-stop round-trip flights from Sofia to Chicago chosen by Cheapflights users in the past 12 months, using the same layover each way.

Warsaw (WAW) – chosen by Cheapflights users on 53% of 1-stop itineraries from Sofia to Chicago on Cheapflights.

What’s the cheapest layover airport for flights from Sofia to Chicago?

Average round-trip fare for 1-stop flights from Sofia to Chicago, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Warsaw (WAW) is the most affordable 1-stop option, with an average round-trip price of $652.

What’s the fastest layover option from Sofia to Chicago?

Shortest average travel time for 1-stop one-way flights from Sofia to Chicago, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Warsaw (WAW) have the shortest average one-way travel time for 1-stop routes: 13h 05m.

Which airport typically offers the quickest layover for flights from Sofia to Chicago?

Average layover duration for 1-stop one-way flights from Sofia to Chicago, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Warsaw (WAW) offer the fastest connection on this route, with an average layover time of 1h 05m.

How far ahead should I book a flight from Sofia to Chicago?

The best time to book flights from Sofia to Chicago is 43 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Chicago. Reviews last updated July 2, 2026.
Read through reviews of airlines operating flights from Sofia to Chicago, such as KLM,LOT, andTurkish Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,532 reviews

Comfort

7.7

Food

7.3

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,532 reviews
KLM
7.8
Good
1,532 reviews

Comfort

7.7

Food

7.3

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
LOT
7.5
Good
1,211 reviews
KLM
7.8
Good
1,532 reviews

Comfort

7.7

Food

7.3

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Turkish Airlines
7.4
Good
4,438 reviews
KLM
7.8
Good
1,532 reviews

Comfort

7.7

Food

7.3

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
United Airlines
7.4
Good
9,926 reviews
KLM
7.8
Good
1,532 reviews

Comfort

7.7

Food

7.3

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Lufthansa
6.8
Okay
8,109 reviews
KLM
7.8
Good
1,532 reviews

Comfort

7.7

Food

7.3

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

Related info for your journey

Find useful and relevant information for your journey from Sofia to Chicago. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Sofia to Chicago?

    Most people fly from Sofia (SOF) if they book a flight from Sofia to Chicago. On average, Sofia has 0 outbound flights to Chicago per day from 6 airlines. Sofia is conveniently located just 4.2 mi from Sofia’s city center.

  • How long is the flight from Sofia to Chicago?

    For as low as $775, United Airlines can have you in Chicago from Sofia in 16h 25m. There are 5194 mi between Sofia and Chicago. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Sofia to Chicago round-trip?

    Currently priced at $594, Turkish Airlines will fly you from Sofia to Chicago and back. In addition to Turkish Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from LOT and KLM - these airlines can fly you to your destination from $629 and $652, respectively. Turkish Airlines is priced at 24% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Sofia to Chicago one-way?

    One-way options have recently been found by users for as low as $455 on Air Serbia. Other airlines that offer cheap prices include Turkish Airlines from $495 and Lufthansa from $635 one-way.

  • Can I find deals for flights from Sofia to Chicago that include hotel bookings?

    Yes. In addition to deals on Sofia to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sofia to Chicago?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sofia to Chicago.

  • Can I find deals for business class flights from Sofia to Chicago?

    Yes. Cheapflights offers flight deals from Sofia to Chicago by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Sofia to Chicago?

    Currently, January is the cheapest month in which you can book a flight from Sofia to Chicago (average of $388). Flying from Sofia to Chicago in July is currently the most expensive (average of $674). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Benton Harbor
Hammond
Lansing
Merrillville
Valparaiso
Porter

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Alternative routes for Sofia to Chicago

See prices for flight routes from nearby airports that may be better suited for you.
Sofia to O'Hare Intl flights

Top 6 airlines flying from Sofia to Chicago

Discover the top 6 airlines that operate flights from Sofia to Chicago. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$594Average$760FlexibilityNo cancel feeOn-time77%
LOTCheapest$629Average$745FlexibilityNo cancel feeOn-time81%
KLMCheapest$652Average$767FlexibilityNo cancel feeOn-time75%
Austrian AirlinesCheapest$658Average$891FlexibilityNo cancel feeOn-time78%
United AirlinesCheapest$703Average$779FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$711Average$849FlexibilityNo cancel feeOn-time76%

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