$314 Cheap Flights from Chicago (ORD) to Sofia (SOF)

View $314 flight on Mon, Aug 17, 2026Opens in a new window

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

Cheap Flights from Chicago to Sofia (ORD-SOF)

Prices were available within the past 7 days and start at $314 for one-way flights and $567 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Dec 10 - Tue, Jan 20
ORD
Chicago
SOF
Sofia
$567 Roundtrip, found 5 days ago
$567
Roundtrip
found 5 days ago
Select United flight, departing Wed, Dec 10 from Chicago to Sofia, returning Tue, Jan 20, priced at $567 found 5 days ago
Lufthansa
Wed, Dec 10 - Tue, Jan 20
ORD
Chicago
SOF
Sofia
$568 Roundtrip, found 5 days ago
$568
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Wed, Dec 10 from Chicago to Sofia, returning Tue, Jan 20, priced at $568 found 5 days ago
Swiss International Air Lines
Wed, Dec 10 - Tue, Jan 20
ORD
Chicago
SOF
Sofia
$569 Roundtrip, found 5 days ago
$569
Roundtrip
found 5 days ago
Select Swiss International Air Lines flight, departing Wed, Dec 10 from Chicago to Sofia, returning Tue, Jan 20, priced at $569 found 5 days ago
Air Serbia
Sun, Apr 5 - Sat, Apr 11
ORD
Chicago
SOF
Sofia
$572 Roundtrip, just found
$572
Roundtrip
just found
Select Air Serbia flight, departing Sun, Apr 5 from Chicago to Sofia, returning Sat, Apr 11, priced at $572 just found
Turkish Airlines
Thu, Mar 12 - Tue, Mar 17
ORD
Chicago
SOF
Sofia
$575 Roundtrip, found 5 days ago
$575
Roundtrip
found 5 days ago
Select Turkish Airlines flight, departing Thu, Mar 12 from Chicago to Sofia, returning Tue, Mar 17, priced at $575 found 5 days ago
Air Canada
Mon, Dec 1 - Tue, Feb 24
ORD
Chicago
SOF
Sofia
$578 Roundtrip, found 5 days ago
$578
Roundtrip
found 5 days ago
Select Air Canada flight, departing Mon, Dec 1 from Chicago to Sofia, returning Tue, Feb 24, priced at $578 found 5 days ago
Air Canada
Wed, Dec 3 - Fri, Dec 12
ORD
Chicago
SOF
Sofia
$578 Roundtrip, just found
$578
Roundtrip
just found
Select Air Canada flight, departing Wed, Dec 3 from Chicago to Sofia, returning Fri, Dec 12, priced at $578 just found
United
Mon, Dec 8 - Thu, Mar 12
ORD
Chicago
SOF
Sofia
$579 Roundtrip, found 9 hours ago
$579
Roundtrip
found 9 hours ago
Select United flight, departing Mon, Dec 8 from Chicago to Sofia, returning Thu, Mar 12, priced at $579 found 9 hours ago
Air Canada
Wed, Dec 3 - Fri, Dec 12
ORD
Chicago
SOF
Sofia
$580 Roundtrip, just found
$580
Roundtrip
just found
Select Air Canada flight, departing Wed, Dec 3 from Chicago to Sofia, returning Fri, Dec 12, priced at $580 just found
Lufthansa
Mon, Nov 3 - Tue, Mar 31
ORD
Chicago
SOF
Sofia
$581 Roundtrip, found 5 days ago
$581
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Mon, Nov 3 from Chicago to Sofia, returning Tue, Mar 31, priced at $581 found 5 days ago

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

November is typically the cheapest month to fly

From $517 - $1,174 per traveler.

Alternative airports near Sofia

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

Select flight to Sofia Airport SOF. Cheapest and Closest option available. Average driving time to city center is 11 minutes. Flights from $595
SOF
Sofia Airport
CheapestClosest
Average driving time to city center11 min
Flights from $595
Flights from Chicago (ORD) to Sofia (SOF)
Origin airport
O'Hare Intl.
Destination airport
Sofia
Airlines serving
Air Canada, Air France, Air Serbia, Austrian Airlines, British Airways, Emirates, ITA Airways, Iberia, JetBlue Airways, KLM, LOT-Polish Airlines, Lufthansa, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United
Roundtrip price
$566
Distance
5197 mi

Chicago to Sofia Flights

The cheapest times to fly from Chicago to Sofia

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 Chicago to Sofia are during the month of December. You can find some of the cheapest flights from Chicago to Sofia with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Chicago to Sofia

Sunday is one of the best days to book for cheap flights from Chicago to Sofia: 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 Chicago to Sofia

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 Chicago to Sofia in 2025. You can also book with separate airlines for your outbound and return journeys, from $314 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 Chicago to Sofia 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 Chicago to Sofia 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 O'Hare Intl. Airport (ORD) to Sofia Airport (SOF) cost?
Lock in a cheap one-way flight from $314 or cheap return flight from $567 from O'Hare Intl. Airport (ORD) to Sofia Airport (SOF) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from O'Hare Intl. Airport (ORD) to Sofia Airport (SOF)?
The cheapest month to fly from ORD to SOF is December, when demand is low. Off-peak season is typically when airlines offer better prices between these airports.
What is the cheapest airline that flies from O'Hare Intl. Airport (ORD) to Sofia Airport (SOF)?
To find the cheapest airline that'll fly you from ORD to SOF, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from O'Hare Intl. Airport (ORD) to Sofia Airport (SOF)?
Direct flights from O'Hare Intl. Airport (ORD) to Sofia Airport (SOF) aren't available daily, so you'll have 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 ORD to SOF?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can change depending on various factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from O'Hare Intl. Airport (ORD) to Sofia Airport (SOF)?
To land at Sofia Airport (SOF) on time, book a flight that leaves from O'Hare Intl. Airport (ORD) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 O'Hare Intl. Airport (ORD) to Sofia Airport (SOF) last-minute?
Last-minute fares from ORD to SOF are typically more expensive. To secure the best prices, start searching for flights ahead of time. That being said, if your travel plans are flexible, it's possible to find a cheap ticket just before your departure.
Is it cheaper to book an ORD to SOF flight and hotel package?
Securing an ORD to SOF flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Pick from our impressive range of hotels and then add flights, car rentals and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from O'Hare Intl. Airport (ORD) to Sofia Airport (SOF)?
Typically, you're able to reschedule or cancel your ORD to SOF flight. However, additional fees may apply, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's guidelines and fees on flight changes, or if you need further information, visit our Customer Service portal.

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*Available to One Key members.