$432 Cheap Flights from Sofia (SOF) to Chicago (ORD)

View $432 flight on Wed, Apr 22, 2026Opens in a new window

Popular airlines from Sofia Airport (SOF) to Chicago O'Hare Intl. Airport (ORD)

Cheap Flights from Sofia to Chicago (SOF-ORD)

Prices were available within the past 7 days and start at $432 for one-way flights and $545 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

LOT-Polish Airlines
Sat, Nov 1 - Sat, Nov 15
SOF
Sofia
ORD
Chicago
$545 Roundtrip, found 7 hours ago
$545
Roundtrip
found 7 hours ago
Select LOT-Polish Airlines flight, departing Sat, Nov 1 from Sofia to Chicago, returning Sat, Nov 15, priced at $545 found 7 hours ago
LOT-Polish Airlines
Thu, Nov 20 - Wed, Nov 26
SOF
Sofia
ORD
Chicago
$547 Roundtrip, found 4 days ago
$547
Roundtrip
found 4 days ago
Select LOT-Polish Airlines flight, departing Thu, Nov 20 from Sofia to Chicago, returning Wed, Nov 26, priced at $547 found 4 days ago
LOT-Polish Airlines
Thu, Nov 6 - Sat, Dec 6
SOF
Sofia
ORD
Chicago
$610 Roundtrip, found 11 hours ago
$610
Roundtrip
found 11 hours ago
Select LOT-Polish Airlines flight, departing Thu, Nov 6 from Sofia to Chicago, returning Sat, Dec 6, priced at $610 found 11 hours ago
LOT-Polish Airlines
Tue, Oct 21 - Tue, Nov 4
SOF
Sofia
ORD
Chicago
$611 Roundtrip, found 4 days ago
$611
Roundtrip
found 4 days ago
Select LOT-Polish Airlines flight, departing Tue, Oct 21 from Sofia to Chicago, returning Tue, Nov 4, priced at $611 found 4 days ago
American Airlines
Sat, Feb 28 - Sun, Mar 1
SOF
Sofia
ORD
Chicago
$619 Roundtrip, found 2 days ago
$619
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Feb 28 from Sofia to Chicago, returning Sun, Mar 1, priced at $619 found 2 days ago
British Airways
Mon, Dec 1 - Sun, Jan 18
SOF
Sofia
ORD
Chicago
$622 Roundtrip, found 19 hours ago
$622
Roundtrip
found 19 hours ago
Select British Airways flight, departing Mon, Dec 1 from Sofia to Chicago, returning Sun, Jan 18, priced at $622 found 19 hours ago
Turkish Airlines
Wed, Jan 21 - Sun, Feb 1
SOF
Sofia
ORD
Chicago
$646 Roundtrip, found 2 days ago
$646
Roundtrip
found 2 days ago
Select Turkish Airlines flight, departing Wed, Jan 21 from Sofia to Chicago, returning Sun, Feb 1, priced at $646 found 2 days ago
Air Canada
Thu, Sep 25 - Mon, Nov 3
SOF
Sofia
ORD
Chicago
$699 Roundtrip, found 6 days ago
$699
Roundtrip
found 6 days ago
Select Air Canada flight, departing Thu, Sep 25 from Sofia to Chicago, returning Mon, Nov 3, priced at $699 found 6 days ago
Lufthansa
Thu, Oct 16 - Wed, Oct 29
SOF
Sofia
ORD
Chicago
$702 Roundtrip, found 2 hours ago
$702
Roundtrip
found 2 hours ago
Select Lufthansa flight, departing Thu, Oct 16 from Sofia to Chicago, returning Wed, Oct 29, priced at $702 found 2 hours ago
Swiss International Air Lines
Wed, Oct 15 - Wed, Oct 29
SOF
Sofia
ORD
Chicago
$706 Roundtrip, found 6 days ago
$706
Roundtrip
found 6 days ago
Select Swiss International Air Lines flight, departing Wed, Oct 15 from Sofia to Chicago, returning Wed, Oct 29, priced at $706 found 6 days ago

Find the cheapest month to fly from Sofia (SOF) to Chicago (ORD)

May is typically the cheapest month to fly

From $549 - $1,149 per traveler.

Alternative airports near Chicago

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Midway Intl. MDW. Cheapest and Closest option available. Average driving time to city center is 16 minutes. Flights from $882
MDW
Midway Intl.
CheapestClosest
Average driving time to city center16 min
Flights from $882
Flights from Sofia (SOF) to Chicago (ORD)
Origin airport
Sofia
Destination airport
O'Hare Intl.
Airlines serving
Air Canada, Air France, Air Serbia, American Airlines, Austrian Airlines, British Airways, Emirates, ITA Airways, Iberia, KLM, LOT-Polish Airlines, Lufthansa, Qatar Airways, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United
Roundtrip price
$544
Distance
5197 mi

Sofia to Chicago Flights

The cheapest times to fly from Sofia to Chicago

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Sofia to Chicago are during the month of November. You can find some of the cheapest flights from Sofia to Chicago with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sofia to Chicago

Sunday is one of the best days to book for cheap flights from Sofia to Chicago: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Sofia to Chicago

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Sofia to Chicago in 2025. You can also book with separate airlines for your outbound and return journeys, from $432 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Sofia to Chicago flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Sofia to Chicago airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Sofia Airport (SOF) to O'Hare Intl. Airport (ORD) cost?
Get a cheap one-way flight from $432 or cheap return flight from $545 from Sofia Airport (SOF) to O'Hare Intl. Airport (ORD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Sofia Airport (SOF) to O'Hare Intl. Airport (ORD)?
Traveling in November can help you save, as it's the cheapest month for flights between SOF and ORD. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Sofia Airport (SOF) to O'Hare Intl. Airport (ORD)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest SOF to ORD flight.
How many flights per day from Sofia Airport (SOF) to O'Hare Intl. Airport (ORD)?
Nonstop flights from Sofia Airport (SOF) to O'Hare Intl. Airport (ORD) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SOF to ORD?
Usually you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* But this can change based on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sofia Airport (SOF) to O'Hare Intl. Airport (ORD)?
To touch down at O'Hare Intl. Airport (ORD) on time, pick a flight that leaves from Sofia Airport (SOF) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Sofia Airport (SOF) to O'Hare Intl. Airport (ORD) last-minute?
Last-minute fares from SOF to ORD are typically more expensive. For the lowest rates, start looking for flights ahead of time. That being said, if your travel plans are flexible, you may land a cheap fare right before your trip.
Is it cheaper to book a SOF to ORD flight and hotel package?
You'll generally save money by booking a SOF to ORD flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've chosen your ideal flights and accommodations, you can add extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Sofia Airport (SOF) to O'Hare Intl. Airport (ORD)?
If you reserved your SOF to ORD flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.

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*Available to One Key members.