$436 Cheap Flights from Austin (AUS) to Sofia (SOF)

View $436 flight on Sun, Feb 8, 2026Opens in a new window

Popular airlines from Austin-Bergstrom Intl. Airport (AUS) to Sofia Airport (SOF)

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Cheap Flights from Austin to Sofia (AUS-SOF)

Prices were available within the past 7 days and start at $436 for one-way flights and $531 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Dec 10 - Sun, Dec 14
AUS
Austin
SOF
Sofia
$531 Roundtrip, found 5 hours ago
$531
Roundtrip
found 5 hours ago
Select United flight, departing Wed, Dec 10 from Austin to Sofia, returning Sun, Dec 14, priced at $531 found 5 hours ago
United
Tue, Dec 30 - Thu, Jan 15
AUS
Austin
SOF
Sofia
$540 Roundtrip, found 5 hours ago
$540
Roundtrip
found 5 hours ago
Select United flight, departing Tue, Dec 30 from Austin to Sofia, returning Thu, Jan 15, priced at $540 found 5 hours ago
Lufthansa
Thu, Jan 15 - Thu, Jan 22
AUS
Austin
SOF
Sofia
$541 Roundtrip, found 14 hours ago
$541
Roundtrip
found 14 hours ago
Select Lufthansa flight, departing Thu, Jan 15 from Austin to Sofia, returning Thu, Jan 22, priced at $541 found 14 hours ago
Lufthansa
Fri, Jan 23 - Sat, Feb 14
AUS
Austin
SOF
Sofia
$544 Roundtrip, found 3 days ago
$544
Roundtrip
found 3 days ago
Select Lufthansa flight, departing Fri, Jan 23 from Austin to Sofia, returning Sat, Feb 14, priced at $544 found 3 days ago
United
Wed, Dec 31 - Thu, Jan 15
AUS
Austin
SOF
Sofia
$545 Roundtrip, found 5 hours ago
$545
Roundtrip
found 5 hours ago
Select United flight, departing Wed, Dec 31 from Austin to Sofia, returning Thu, Jan 15, priced at $545 found 5 hours ago
Lufthansa
Thu, Jan 15 - Thu, Jan 22
AUS
Austin
SOF
Sofia
$547 Roundtrip, found 14 hours ago
$547
Roundtrip
found 14 hours ago
Select Lufthansa flight, departing Thu, Jan 15 from Austin to Sofia, returning Thu, Jan 22, priced at $547 found 14 hours ago
British Airways
Sat, Feb 7 - Sat, Feb 28
AUS
Austin
SOF
Sofia
$547 Roundtrip, found 4 days ago
$547
Roundtrip
found 4 days ago
Select British Airways flight, departing Sat, Feb 7 from Austin to Sofia, returning Sat, Feb 28, priced at $547 found 4 days ago
Air Canada
Thu, Jan 22 - Mon, Jan 26
AUS
Austin
SOF
Sofia
$548 Roundtrip, found 6 days ago
$548
Roundtrip
found 6 days ago
Select Air Canada flight, departing Thu, Jan 22 from Austin to Sofia, returning Mon, Jan 26, priced at $548 found 6 days ago
Air Canada
Thu, Jan 22 - Mon, Jan 26
AUS
Austin
SOF
Sofia
$549 Roundtrip, found 6 days ago
$549
Roundtrip
found 6 days ago
Select Air Canada flight, departing Thu, Jan 22 from Austin to Sofia, returning Mon, Jan 26, priced at $549 found 6 days ago
KLM
Sun, Dec 7 - Thu, Dec 25
AUS
Austin
SOF
Sofia
$590 Roundtrip, found 5 hours ago
$590
Roundtrip
found 5 hours ago
Select KLM flight, departing Sun, Dec 7 from Austin to Sofia, returning Thu, Dec 25, priced at $590 found 5 hours 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 $994
SOF
Sofia Airport
CheapestClosest
Average driving time to city center11 min
Flights from $994

Frequently asked questions

How much does a flight from Austin-Bergstrom Intl. Airport (AUS) to Sofia Airport (SOF) cost?
Snag a cheap one-way flight from $436 or cheap return flight from $531 from Austin-Bergstrom Intl. Airport (AUS) 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 Austin-Bergstrom Intl. Airport (AUS) to Sofia Airport (SOF)?
The cheapest month to fly from AUS to SOF is December, when demand is low. Off-peak months are often when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Austin-Bergstrom Intl. Airport (AUS) to Sofia Airport (SOF)?
To find the cheapest airline that'll fly you from AUS to SOF, use Expedia's filter tool. Customize your search based on what's important to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Austin-Bergstrom Intl. Airport (AUS) to Sofia Airport (SOF)?
You'll have to catch a flight with a layover if you're traveling from Austin-Bergstrom Intl. Airport (AUS) to Sofia Airport (SOF). There are no daily direct flights on this route. However, just filter your search to include one or two stops to find the best option for your trip.
What day of the week has the most flights from AUS to SOF?
Generally you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* However, this can vary 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 Austin-Bergstrom Intl. Airport (AUS) to Sofia Airport (SOF)?
Opt for a flight from Austin-Bergstrom Intl. Airport (AUS) to Sofia Airport (SOF) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures after this hour are on average 22% more likely to be canceled.**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 Austin-Bergstrom Intl. Airport (AUS) to Sofia Airport (SOF) last-minute?
Last-minute bookings from AUS to SOF are typically more expensive. To secure the lowest prices, start searching for flights ahead of time. That said, if you're flexible with your travel plans, it's possible to score a cheap ticket just before your departure.
Is it cheaper to book an AUS to SOF flight and hotel package?
Compared with arranging flights and hotels separately, booking an AUS to SOF flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one convenient place will take the hassle out of travel planning. Just secure your flights and choose from our extensive range of hotels, then tailor your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Austin-Bergstrom Intl. Airport (AUS) to Sofia Airport (SOF)?
If you reserved your AUS to SOF flight within the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of ticket 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, head to our Customer Service portal for more details.

Travel information

Origin airport
Austin-Bergstrom Intl.
Destination airport
Sofia
Airlines serving
Air Canada, British Airways, KLM, Lufthansa, United
Roundtrip price
$531
Distance
6165 mi

Book with confidence

Austin to Sofia Flights

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

 

The best time to book a flight from Austin to Sofia

Sunday is one of the best days to book for cheap flights from Austin 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 Austin 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 Austin to Sofia in 2025. You can also book with separate airlines for your outbound and return journeys, from $436 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 Austin 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 Austin 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.

 

Austin to Sofia Flights

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*Available to One Key members.