HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Sofia

$522+ Cheap flights from Austin (AUS) to Sofia (SOF)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — SOF
Jan 29 — Feb 51
Thu 1/29
Thu 2/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Austin to Sofia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Austin to Sofia

Best flights from Austin to Sofia
Discover carefully curated flight deals from Austin to Sofia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 30, 2025.

This FlightHub deal was found by Cheapflights users on 12/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/204:57 pmAUS - SOF
2 stops22h 13mLufthansa
Fri 5/86:20 amSOF - AUS
1 stop15h 40mLufthansa
Deal found 12/29$522
This United Airlines deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/212:15 pmAUS - SOF
2 stops24h 30mUnited Airlines
Thu 3/56:00 amSOF - AUS
1 stop16h 15mUnited Airlines
Deal found 12/27$536
This United Airlines deal was found by Cheapflights users on 12/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/183:50 pmAUS - SOF
2 stops22h 55mUnited Airlines
Sun 2/226:10 amSOF - AUS
1 stop16h 05mUnited Airlines
Deal found 12/29$536
This FlightHub deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/194:10 pmAUS - SOF
1 stop17h 50mLufthansa
Tue 3/36:00 amSOF - AUS
1 stop16h 15mLufthansa
Deal found 12/27$540
This United Airlines deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/181:10 pmAUS - SOF
2 stops21h 10mUnited Airlines
Tue 3/36:00 amSOF - AUS
1 stop16h 15mUnited Airlines
Deal found 12/27$536
This United Airlines deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1910:00 amAUS - SOF
2 stops28h 45mUnited Airlines
Thu 3/56:00 amSOF - AUS
1 stop16h 15mUnited Airlines
Deal found 12/27$536
This United Airlines deal was found by Cheapflights users on 12/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/171:10 pmAUS - SOF
2 stops25h 35mUnited Airlines
Sun 2/226:10 amSOF - AUS
1 stop16h 05mUnited Airlines
Deal found 12/29$536
This United Airlines deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/222:10 pmAUS - SOF
2 stops20h 10mUnited Airlines
Tue 3/36:00 amSOF - AUS
1 stop16h 15mUnited Airlines
Deal found 12/27$536
This United Airlines deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/227:15 amAUS - SOF
2 stops21h 45mUnited Airlines
Thu 3/56:00 amSOF - AUS
1 stop16h 15mUnited Airlines
Deal found 12/27$536
This United Airlines deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/219:43 amAUS - SOF
2 stops29h 02mUnited Airlines
Tue 3/36:00 amSOF - AUS
1 stop16h 15mUnited Airlines
Deal found 12/27$536

Find flight deals from Austin to Sofia

Discover tips and strategies to find the most affordable flight options for your journey from Austin (AUS) to Sofia (SOF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$509
(oojo)

Popular in

June

Cheapest in

March

Average price

$1,099
Provider with most accurate pricing for Austin Bergstrom-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Austin Bergstrom-Sofia flights.
Search Deals
From Austin Bergstrom to Sofia
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($350 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($49 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Austin to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 30, 2025.
Use the filters below to find and compare flights from Austin to Sofia that are best for you.

Fly from

Austin

Fly to

Sofia

Route

Depart

Return

Price

AustinSofia

AUS - SOF

AUSSOF

Austin Bergstrom

Mon 4/20

4:57 pm-11:10 pm

2 stops22h 13m

Sofia

Fri 5/8

6:20 am-2:00 pm

1 stop15h 40m

$522

AustinSofia

AUS - SOF

AUSSOF

Austin Bergstrom

Sat 2/21

2:15 pm-10:45 pm

2 stops24h 30m

Sofia

Thu 3/5

6:00 am-2:15 pm

1 stop16h 15m

$536

AustinSofia

AUS - SOF

AUSSOF

Austin Bergstrom

Wed 2/18

3:50 pm-10:45 pm

2 stops22h 55m

Sofia

Sun 2/22

6:10 am-2:15 pm

1 stop16h 05m

$536

AustinSofia

AUS - SOF

AUSSOF

Austin Bergstrom

Wed 2/18

1:10 pm-6:20 pm

2 stops21h 10m

Sofia

Tue 3/3

6:00 am-2:15 pm

1 stop16h 15m

$536

AustinSofia

AUS - SOF

AUSSOF

Austin Bergstrom

Thu 2/19

10:00 am-10:45 pm

2 stops28h 45m

Sofia

Thu 3/5

6:00 am-2:15 pm

1 stop16h 15m

$536

AustinSofia

AUS - SOF

AUSSOF

Austin Bergstrom

Tue 2/17

1:10 pm-10:45 pm

2 stops25h 35m

Sofia

Sun 2/22

6:10 am-2:15 pm

1 stop16h 05m

$536

AustinSofia

AUS - SOF

AUSSOF

Austin Bergstrom

Sun 2/22

2:10 pm-6:20 pm

2 stops20h 10m

Sofia

Tue 3/3

6:00 am-2:15 pm

1 stop16h 15m

$536

AustinSofia

AUS - SOF

AUSSOF

Austin Bergstrom

Sun 2/22

7:15 am-1:00 pm

2 stops21h 45m

Sofia

Thu 3/5

6:00 am-2:15 pm

1 stop16h 15m

$536

AustinSofia

AUS - SOF

AUSSOF

Austin Bergstrom

Sat 2/21

9:43 am-10:45 pm

2 stops29h 02m

Sofia

Tue 3/3

6:00 am-2:15 pm

1 stop16h 15m

$536

AustinSofia

AUS - SOF

AUSSOF

Austin Bergstrom

Thu 2/19

4:10 pm-6:00 pm

1 stop17h 50m

Sofia

Tue 3/3

6:00 am-2:15 pm

1 stop16h 15m

$540

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/29

Compare providers for flights from Austin to Sofia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Austin to Sofia in December.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Austin-Sofia flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Austin-Sofia flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Austin-Sofia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Austin-Sofia flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Austin-Sofia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Austin to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Austin with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sofia. Reviews last updated December 30, 2025.
Peruse reviews from past customers who have flown with United Airlines and Lufthansa from Austin to Sofia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,122 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,122 reviews
United Airlines
7.4
Good
9,122 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Lufthansa
6.8
Okay
7,663 reviews
United Airlines
7.4
Good
9,122 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Related info for your journey

Find useful and relevant information for your journey from Austin to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Austin to Sofia?

    There are many flights that can get you from Austin to Sofia in 22h 13m. Fly via Lufthansa, United Airlines, or KLM to get the fastest option. Airlines will cover a distance of 6162 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Austin to Sofia round-trip?

    Lufthansa, at $639, was found to be the cheapest airline from Austin to Sofia. An alternate airline flying to your destination would be United Airlines. Lufthansa is priced at 36% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Austin to Sofia that include hotel bookings?

    Yes. In addition to deals on Austin to Sofia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Austin to Sofia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Austin to Sofia.

  • Can I find deals for business class flights from Austin to Sofia?

    Yes. Cheapflights offers flight deals from Austin to Sofia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Austin to Sofia

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to Sofia flights
Love Field to Sofia flights
Hobby to Sofia flights
George Bush Intcntl to Sofia flights
Midland to Sofia flights
Laredo to Sofia flights

Top 2 airlines flying from Austin to Sofia

Discover the top 2 airlines that operate flights from Austin to Sofia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$639Average$896FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$954Average$1,260FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.