Cheap flights from Austin to Sydney from $644
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
Cheapflights Tip: The best prices from Austin Bergstrom to Sydney Kingsford Smith are usually found in May or September, booked 72 days in advance, depart on a Friday or Saturday and return on a Saturday
Find flight deals from Austin to Sydney
Cheapest flights from Austin to SydneyExplore the most affordable flight options available from Austin to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 October 2025.
Explore the most affordable flight options available from Austin to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 October 2025.
Cheap flight deals from Austin to Sydney
Discover tips and strategies to find the most affordable flight options for your journey from Austin (AUS) to Sydney (SYD). 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 29 October 2025.
Round-trip from | $1,280 |
|---|---|
One-way from | $644 |
Popular in | December |
Cheapest in | May |
Average price | $1,970 |
Cheapflights Fare Finder
Use the filters below to find and compare flights from Austin to Sydney that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
AustinSydney
AUS - SYD
AUSSYD
Austin Bergstrom
Wed 15/4
16:32-07:00
1 stop23h 28m
Sydney Kingsford Smith
Mon 27/4
10:20-23:53
1 stop28h 33m
AustinSydney
AUS - SYD
AUSSYD
Austin Bergstrom
Tue 10/2
17:55-07:00
1 stop20h 05m
Sydney Kingsford Smith
Tue 24/2
11:20-14:35
1 stop20h 15m
AustinSydney
AUS - SYD
AUSSYD
Austin Bergstrom
Sat 7/3
17:58-09:15
1 stop22h 17m
Sydney Kingsford Smith
Tue 17/3
14:00-22:20
1 stop24h 20m
AustinSydney
AUS - SYD
AUSSYD
Austin Bergstrom
Fri 10/4
16:32-07:00
1 stop23h 28m
Sydney Kingsford Smith
Thu 30/4
09:30-15:41
1 stop21h 11m
AustinSydney
AUS - SYD
AUSSYD
Austin Bergstrom
Thu 13/11
14:16-07:00
1 stop23h 44m
Sydney Kingsford Smith
Thu 20/11
11:20-21:53
1 stop27h 33m
AustinSydney
AUS - SYD
AUSSYD
Austin Bergstrom
Wed 11/3
16:18-07:00
1 stop22h 42m
Sydney Kingsford Smith
Tue 17/3
14:00-18:33
1 stop20h 33m
AustinSydney
AUS - SYD
AUSSYD
Austin Bergstrom
Mon 3/11
16:18-09:05
2 stops23h 47m
AustinSydney
AUS - SYD
AUSSYD
Austin Bergstrom
Sat 3/1
19:00-22:05
2 stops34h 05m
AustinSydney
AUS - SYD
AUSSYD
Austin Bergstrom
Sat 3/1
14:00-09:00
1 stop26h 00m
AustinSydney
AUS - SYD
AUSSYD
Austin Bergstrom
Sat 3/1
14:00-09:00
1 stop26h 00m
Best time to book a flight from Austin to Sydney
Have a flexible travel schedule? Discover the best time to fly to Sydney from Austin with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Austin to Sydney
How far ahead should I book a flight from Austin to Sydney?
To ensure you get the cheapest price possible for a flight from Austin to Sydney, you should look to book at least 72 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Austin to Sydney?
Currently, May is the cheapest month in which you can book a flight from Austin to Sydney (average of $878). Flying from Austin to Sydney in December is currently the most expensive (average of $1,673). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from AUS to SYD?
It’s typically best to fly out from Austin to Sydney in the evening. Doing so could potentially save you 46% on the flight price compared to flying in the morning, which is usually more expensive.
What is the cheapest day to fly from Austin to Sydney?
Travellers seeking maximum savings on their Austin to Sydney flight should consider departing on Saturday evenings when fares are most often at their lowest. Monday at midday flights should be avoided if possible as fares are typically the most expensive at this time.
What’s the top stopover airport for flights from Austin to Sydney?
Houston (IAH) – chosen by Cheapflights users on 33% of one-stop itineraries from Austin to Sydney on Cheapflights.
What’s the fastest stopover option from Austin to Sydney?
Flights via Dallas (DFW) have the shortest average one-way travel time for one-stop routes: 19h 39m.
What’s the fastest stopover option from Austin to Sydney?
Flights via Dallas (DFW) have the shortest average one-way travel time for one-stop routes: 19h 39m.
Which airport typically offers the quickest stopover for flights from Austin to Sydney?
Flights via Dallas (DFW) offer the fastest connection on this route, with an average stopover time of 1h 46m.
Related info for your journey
Find useful and relevant information for your journey from Austin to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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How does Cheapflights help users find flights from Austin to Sydney?
Cheapflights makes it easy to find Austin to Sydney flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.
Why should you use Cheapflights to find cheap flight tickets from Austin to Sydney?
It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Austin to Sydney.
Can Cheapflights find flights from Austin to Sydney with no change fees?
Cheapflights does show flights with no change fees to all users. To see these options for flights from Austin to Sydney, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from Austin to Sydney become cheaper?
Yes, Cheapflights offers price alerts on Austin to Sydney flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.