$409 Cheap United flights from Chicago to Sofia (ORD to SOF)

Find The Best Day To Fly from Chicago to Sofia

Amazing United ORD to SOF Flight Deals

The cheapest flights to Sofia found within the past 7 days were $577 round trip and $409 one way. Prices and availability subject to change. Additional terms may apply.

Tue, Sep 2 - Thu, Sep 11
ORD
Chicago
SOF
Sofia
$577 Roundtrip, found 2 days ago
$577
Roundtrip
found 2 days ago
Select United flight, departing Tue, Sep 2 from Chicago to Sofia, returning Thu, Sep 11, priced at $577 found 2 days ago

SOF From ORD Economy Coach Packages on Similar Airlines

Price found within the past 48 hours. Click for updated prices.
Agora Boutique

Agora Boutique

3 out of 5
per person
Aug 27 - Sep 2
found 1 day ago
Roundtrip non-stop flight included
Chicago (ORD) to Sofia (SOF)
Oborishte 63 Boutique Hotel

Oborishte 63 Boutique Hotel

4 out of 5
per person
Aug 27 - Sep 2
found 1 day ago
Roundtrip non-stop flight included
Chicago (ORD) to Sofia (SOF)
Expo Hotel Sofia

Expo Hotel Sofia

4 out of 5
per person
Aug 27 - Sep 2
found 1 day ago
Roundtrip non-stop flight included
Chicago (ORD) to Sofia (SOF)
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Frequently asked questions

Can I catch a flight from ORD to Sofia Intl. Airport right now?
It's always prudent to learn about any quarantine requirements and travel advice reports in place in your destination. Be sure to visit the Covid-19 Travel Advisor for up-to-date info on catching a flight to Sofia Intl. Airport from O'Hare Airport.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Sofia Intl. Airport, please visit our Customer Service Portal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Discover our best United flight from Chicago ORD to Sofia SOF 

To find the best deals on flights to Chicago from Sofia with United, just enter your travel dates, filter by United, and hit search. You’ll find flights to choose from and can sort by price, flight duration, and arrival or departure time.  

 

Return flights from Chicago ORD to Sofia SOF with United 

If you’re planning a round trip, booking return flights with United is usually the most cost-effective option. With airfares ranging from $577 to $577, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way United flights from Chicago ORD to Sofia SOF 

A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way United flight from Chicago to Sofia costs from $409. Prices and availability subject to change. Additional terms may apply. 

 

The easy way to find cheap flights to Sofia SOF from  Chicago ORD with United 

To find a cheap United flight from Chicago ORD to Sofia SOF, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference. 

 

How to find our best airfare deals on United flights from Chicago ORD to Sofia SOF 

If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as September, or if you book a flight with a stopover. 

 

Find nonstop flights from Chicago ORD to Sofia SOF with United 

If you’re keen to be on Sofia soil fast, don’t waste time with a stopover—filter your search results to show direct United flights only. The journey takes around hour(s) min(s) – so you’ll be there before you know it. 

 

Flexible airline tickets for United flights from Chicago ORD to Sofia SOF 

Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.  

 

There are a lot of reasons to book your flights to Sofia SOF from  Chicago ORD with United on Travelocity 

At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.

United Airports
Hop on a(n) United flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ORDUSAO'Hare Intl.227
DENUSADenver Intl.226
IAHUSAGeorge Bush Intercontinental136
IADUSAWashington Dulles Intl.100
SFOUSASan Francisco Intl.64
LAXUSALos Angeles Intl.23
EWRUSALiberty Intl.20
FRADEUFrankfurt Intl.19
NRTJPNNarita Intl.19
PEKCHNCapital Intl.16

Travelers ❤️ these 🏨 after their flight to Sofia

Ibis Sofia Airport

Ibis Sofia Airport

3 out of 5
132 Mimi Balkanska Str, Sofia
A restaurant and a bar/lounge are featured at this hotel. Traveling on business? Take advantage of the free WiFi in public areas, express check-out, and free ...
8/10 Very Good! (908 reviews)
"Very convenient for airport late arrivals or early departures <10 minute walk to T1. Helpful staff provided packed breakfast as I had to leave at 5 am. Room functional/basic, had what I needed."

Reviewed on Jul 11, 2025

Ibis Sofia Airport
Hotel Premier Sofia Airport

Hotel Premier Sofia Airport

4 out of 5
11 Briuksel Boulevard, Sofia
This hotel features a restaurant, a 24-hour gym, and a bar/lounge. Traveling on business? Take advantage of the 24-hour business center, free WiFi in public ...
9/10 Wonderful! (1,001 reviews)
"My stay at hotel Premier was easy, convenient and simple. As long as you book the shuttle with the hotel they would transport you to and from the airport. The staff was also particularly helpful."

Reviewed on Jul 2, 2025

Hotel Premier Sofia Airport
ATM Aparts Sofia

ATM Aparts Sofia

3 out of 5
Poligona Area, Building 44, Entrance A, Sofia
This aparthotel includes free WiFi in public areas and laundry facilities.
8/10 Very Good! (70 reviews)
"Nice apartment. All fine."

Reviewed on Jun 25, 2025

ATM Aparts Sofia
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.