$290 Cheap Flights from Chicago (ORD) to Sofia (SOF)

View $290 flight on Sun, Aug 30, 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 $290 for one-way flights and $708 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Aug 11 - Wed, Sep 16
ORD
Chicago
SOF
Sofia
$708 Roundtrip, found 1 day ago
$708
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Aug 11 from Chicago to Sofia, returning Wed, Sep 16, priced at $708 found 1 day ago
Air Serbia
Wed, Dec 30 - Wed, Jan 6
ORD
Chicago
SOF
Sofia
$715 Roundtrip, found 4 days ago
$715
Roundtrip
found 4 days ago
Select Air Serbia flight, departing Wed, Dec 30 from Chicago to Sofia, returning Wed, Jan 6, priced at $715 found 4 days ago
British Airways
Sun, Aug 16 - Wed, Nov 4
ORD
Chicago
SOF
Sofia
$729 Roundtrip, found 8 hours ago
$729
Roundtrip
found 8 hours ago
Select British Airways flight, departing Sun, Aug 16 from Chicago to Sofia, returning Wed, Nov 4, priced at $729 found 8 hours ago
British Airways
Tue, Oct 13 - Wed, Nov 11
ORD
Chicago
SOF
Sofia
$733 Roundtrip, found 4 days ago
$733
Roundtrip
found 4 days ago
Select British Airways flight, departing Tue, Oct 13 from Chicago to Sofia, returning Wed, Nov 11, priced at $733 found 4 days ago
American Airlines
Sun, Sep 6 - Mon, Oct 5
ORD
Chicago
SOF
Sofia
$738 Roundtrip, found 18 hours ago
$738
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Sun, Sep 6 from Chicago to Sofia, returning Mon, Oct 5, priced at $738 found 18 hours ago
British Airways
Mon, Jan 11 - Wed, Feb 10
ORD
Chicago
SOF
Sofia
$744 Roundtrip, found 5 days ago
$744
Roundtrip
found 5 days ago
Select British Airways flight, departing Mon, Jan 11 from Chicago to Sofia, returning Wed, Feb 10, priced at $744 found 5 days ago
United
Mon, Aug 3 - Tue, Nov 3
ORD
Chicago
SOF
Sofia
$780 Roundtrip, found 8 hours ago
$780
Roundtrip
found 8 hours ago
Select United flight, departing Mon, Aug 3 from Chicago to Sofia, returning Tue, Nov 3, priced at $780 found 8 hours ago
Lufthansa
Sun, Aug 16 - Wed, Nov 4
ORD
Chicago
SOF
Sofia
$780 Roundtrip, found 8 hours ago
$780
Roundtrip
found 8 hours ago
Select Lufthansa flight, departing Sun, Aug 16 from Chicago to Sofia, returning Wed, Nov 4, priced at $780 found 8 hours ago
Swiss International Air Lines
Tue, Jul 28 - Mon, Nov 23
ORD
Chicago
SOF
Sofia
$784 Roundtrip, found 5 days ago
$784
Roundtrip
found 5 days ago
Select Swiss International Air Lines flight, departing Tue, Jul 28 from Chicago to Sofia, returning Mon, Nov 23, priced at $784 found 5 days ago
Air Canada
Wed, Nov 4 - Wed, Nov 18
ORD
Chicago
SOF
Sofia
$792 Roundtrip, found 2 days ago
$792
Roundtrip
found 2 days ago
Select Air Canada flight, departing Wed, Nov 4 from Chicago to Sofia, returning Wed, Nov 18, priced at $792 found 2 days ago

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 $1,238
SOF
Sofia Airport
CheapestClosest
Average driving time to city center11 min
Flights from $1,238

Frequently asked questions

How much does a flight from Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF) cost?
You can find cheap one-way flights and cheap return flights from $708 Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF) with Expedia. One-way flights typically cost between $477 and $6371, and return flights often range between $664 and $6382. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF)?
November is the cheapest month to fly from Chicago, IL (ORD) to Sofia (SOF), with average return fares around $644. This is about 23% lower than the average price throughout the year, as November typically sees a drop in travel demand. Other budget-friendly months include January and October.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF)?
Enter ORD to SOF and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF)?
Air Europa is one of the cheapest airlines offering connecting flights from O'Hare Intl. (ORD) to Sofia (SOF) with a layover in John F. Kennedy Intl. (JFK), starting from around $1,918 for a round-trip ticket. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF)?
To find a cheap flight from Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF)?
The best time to fly from Chicago, IL (ORD) to Sofia (SOF) is in October or November. Return flights average around $644, making these months a good choice for budget-conscious travelers. The fall weather in Sofia is usually mild, enhancing your travel experience.*Prices based on flights available on Expedia in the last year.
What is the earliest flight from Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from ORD to SOF. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF)?
The most popular departure times for flights from O'Hare International Airport (ORD) to Sofia (SOF) are in the late afternoon, from 3pm to 6pm. About 40% of passengers prefer this time window. Many major carriers, including United Airlines, Lufthansa and Austrian Airlines, offer flights during this window. This timing works well because it allows you to maximize your day in Chicago before heading to Sofia.
How long does it take to fly from Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF)?
Flying from ORD to SOF with a connection usually takes about 20 hours 20 minutes, traveling roughly 5,198 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF)?
Business class is available on flights from ORD to SOF. Airlines that offer business class service on this route include:

  • Lufthansa
  • Turkish Airlines
  • United Airlines
  • Austrian Airlines
  • Iberia
  • Emirates
  • Swiss International Air Lines
  • Icelandair
  • American Airlines
  • Air Canada

First class is available with Swiss International Air Lines and Lufthansa.
How do I earn miles on a Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF) flight with Expedia?
It's easy to earn miles on a Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF) at the last minute?
Typically, booking a last minute flight from Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF) flight and hotel package?
Securing a Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF) Sofia Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF)?
If you booked your Chicago, IL (ORD-O'Hare Intl.) to Sofia (SOF) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

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
$708
Distance
5197 mi

Book with confidence

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 August. 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 2026. You can also book with separate airlines for your outbound and return journeys, from $290 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.

 

Chicago to Sofia Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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