HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Chicago

$313+ 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 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — CHI
Mar 11 — Mar 181
Wed 3/11
Wed 3/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Sofia to Chicago with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 February 9, 2026.

This Justfly.com deal was found by Cheapflights users on 2/8. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/164:00 pm
SOF
-
ORD
1 stop34h 25m
Turkish Airlines
Sun 3/2911:25 am
ORD
-
SOF
1 stop19h 35m
Turkish Airlines
Deal found 2/8$648
This FlightHub deal was found by Cheapflights users on 2/6. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/183:50 pm
SOF
-
ORD
1 stop25h 50m
Turkish Airlines
Thu 4/238:10 pm
ORD
-
SOF
1 stop34h 50m
Turkish Airlines
Deal found 2/6$649
This oojo deal was found by Cheapflights users on 2/7. 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 4/235:25 am
SOF
-
ORD
1 stop22h 25m
LOT
Fri 8/285:10 pm
ORD
-
SOF
2 stops36h 45m
LOT
Deal found 2/7$655
This FlightHub deal was found by Cheapflights users on 2/8. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:45 pm
SOF
-
ORD
1 stop28h 25m
LOT
Thu 10/155:10 pm
ORD
-
SOF
2 stops24h 45m
LOT
Deal found 2/8$657
This oojo deal was found by Cheapflights users on 2/8. 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 3/164:00 pm
SOF
-
ORD
1 stop34h 25m
Turkish Airlines
Mon 3/308:10 pm
ORD
-
SOF
1 stop16h 05m
Turkish Airlines
Deal found 2/8$662
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/209:20 pm
SOF
-
ORD
2 stops25h 10m
Multiple Airlines
Wed 10/144:30 pm
ORD
-
SOF
1 stop24h 55m
Multiple Airlines
Deal found 2/8$664
This Kiwi.com deal was found by Cheapflights users on 2/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/82:35 pm
SOF
-
ORD
1 stop13h 25m
LOT
Sat 4/189:50 pm
ORD
-
SOF
1 stop12h 10m
LOT
Deal found 2/6$665
This FlightHub deal was found by Cheapflights users on 2/8. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:40 pm
SOF
-
ORD
1 stop32h 30m
LOT
Thu 10/159:50 pm
ORD
-
SOF
1 stop12h 10m
LOT
Deal found 2/8$673
This FlightHub deal was found by Cheapflights users on 2/8. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/303:50 pm
SOF
-
ORD
1 stop25h 50m
Turkish Airlines
Mon 5/1111:25 am
ORD
-
SOF
1 stop24h 50m
Turkish Airlines
Deal found 2/8$676
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/209:20 pm
SOF
-
ORD
2 stops25h 10m
Multiple Airlines
Sun 10/114:30 pm
ORD
-
SOF
1 stop24h 55m
Multiple Airlines
Deal found 2/8$677
This LOT deal was found by Cheapflights users on 2/8. 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 LOT is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/132:35 pm
SOF
-
ORD
1 stop13h 25m
LOT
Mon 4/69:50 pm
ORD
-
SOF
1 stop12h 10m
LOT
Deal found 2/8$680
This LOT deal was found by Cheapflights users on 2/6. 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 LOT is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/132:35 pm
SOF
-
ORD
1 stop13h 25m
LOT
Tue 4/219:50 pm
ORD
-
SOF
1 stop12h 10m
LOT
Deal found 2/6$681

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 February 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$649
(FlightHub)

One-way from

$313
(Kiwi.com)

Popular in

May

Cheapest in

April

Average price

$690
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. 2% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 9, 2026.
Use the filters below to find and compare flights from Sofia to Chicago that are best for you.

Fly from

Sofia

Fly to

Chicago

Route

Depart

Return

Price

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 3/16

4:00 pm-7:25 pm

1 stop34h 25m

Chicago O'Hare Intl

Sun 3/29

11:25 am-3:00 pm

1 stop19h 35m

$648

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 3/10

2:35 pm-9:00 pm

1 stop13h 25m

Chicago O'Hare Intl

Sun 4/12

9:50 pm-6:00 pm

1 stop12h 10m

$680

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 3/7

2:35 pm-8:00 pm

1 stop13h 25m

Chicago O'Hare Intl

Sun 4/19

9:50 pm-6:00 pm

1 stop12h 10m

$680

SofiaChicago

SOF - ORD

SOFORD

Sofia

Thu 3/12

2:35 pm-9:00 pm

1 stop13h 25m

Chicago O'Hare Intl

Tue 4/7

9:50 pm-6:00 pm

1 stop12h 10m

$680

SofiaChicago

SOF - ORD

SOFORD

Sofia

Tue 3/10

2:35 pm-9:00 pm

1 stop13h 25m

Chicago O'Hare Intl

Fri 4/17

9:50 pm-6:00 pm

1 stop12h 10m

$680

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 3/9

4:00 pm-7:25 pm

1 stop34h 25m

Chicago O'Hare Intl

Thu 4/9

11:25 am-1:15 pm

1 stop17h 50m

$706

SofiaChicago

SOF - ORD

SOFORD

Sofia

Mon 3/9

4:00 pm-11:05 am

1 stop26h 05m

Chicago O'Hare Intl

Wed 4/8

8:10 pm-1:15 pm

1 stop33h 05m

$710

SofiaChicago

SOF - ORD

SOFORD

Sofia

Wed 3/11

6:35 pm-9:00 pm

1 stop33h 25m

Chicago O'Hare Intl

Thu 4/9

9:50 pm-6:00 pm

2 stops36h 10m

$719

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sat 4/4

5:25 am-3:10 pm

1 stop17h 45m

Chicago O'Hare Intl

Fri 5/8

9:50 pm-1:55 pm

1 stop32h 05m

$720

SofiaChicago

SOF - ORD

SOFORD

Sofia

Sun 3/1

7:00 am-2:20 pm

1 stop15h 20m

Chicago O'Hare Intl

Sat 4/18

5:10 pm-2:00 pm

1 stop12h 50m

$727

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/6

Showing 1-10 of 44 results
1
2
3
...
5

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 February.
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

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

Use this chart to determine the optimal time to book a round-trip flight from Sofia to Chicago. Price data was last updated on February 6, 2026.

The best time to book flights from Sofia to Chicago is 88 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.

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

Currently, November is the cheapest month in which you can book a flight from Sofia to Chicago (average of $527). Flying from Sofia to Chicago in August is currently the most expensive (average of $670). 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.

Istanbul (IST) – chosen by Cheapflights users on 55% 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 $552.

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 03m.

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 February 9, 2026.
Read through reviews of airlines operating flights from Sofia to Chicago, such as KLM, LOT, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,450 reviews

Comfort

7.6

Entertainment

7.1

Food

7.3

Crew

8.4

Boarding

7.8

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,450 reviews
KLM
7.7
Good
1,450 reviews

Comfort

7.6

Entertainment

7.1

Food

7.3

Crew

8.4

Boarding

7.8

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
LOT
7.5
Good
1,179 reviews
KLM
7.7
Good
1,450 reviews

Comfort

7.6

Entertainment

7.1

Food

7.3

Crew

8.4

Boarding

7.8

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
United Airlines
7.4
Good
9,259 reviews
KLM
7.7
Good
1,450 reviews

Comfort

7.6

Entertainment

7.1

Food

7.3

Crew

8.4

Boarding

7.8

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Turkish Airlines
7.3
Good
4,210 reviews
KLM
7.7
Good
1,450 reviews

Comfort

7.6

Entertainment

7.1

Food

7.3

Crew

8.4

Boarding

7.8

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Lufthansa
6.8
Okay
7,775 reviews
KLM
7.7
Good
1,450 reviews

Comfort

7.6

Entertainment

7.1

Food

7.3

Crew

8.4

Boarding

7.8

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 $748, Turkish Airlines can have you in Chicago from Sofia in 17h 54m. There are 5198 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 $576, LOT will fly you from Sofia to Chicago and back. In addition to LOT, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from KLM and Turkish Airlines - these airlines can fly you to your destination from $621 and $625, respectively. LOT is priced at 25% 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 $388 on Air Serbia. Other airlines that offer cheap prices include Turkish Airlines from $495 and Lufthansa from $636 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, November is the cheapest month in which you can book a flight from Sofia to Chicago (average of $527). Flying from Sofia to Chicago in August is currently the most expensive (average of $670). 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
Lansing
Merrillville
Hammond
Porter
Benton Harbor

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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
Sofia to Midway 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 February 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
LOTCheapest$576Average$697FlexibilityNo cancel feeOn-time81%
KLMCheapest$621Average$769FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$625Average$731FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$649Average$766FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$650Average$772FlexibilityNo cancel feeOn-time76%
Austrian AirlinesCheapest$658Average$790FlexibilityNo cancel feeOn-time78%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.