$526 Cheap Flights from Kalgoorlie - Boulder (KGI) to Sydney (SYD)

View $526 flight on Thu, Jan 1, 2026Opens in a new window

Popular airlines from Kalgoorlie - Boulder, WA (KGI) to Sydney Airport (SYD)

Cheap Flights from Kalgoorlie - Boulder to Sydney (KGI-SYD)

Prices were available within the past 7 days and start at $526 for one-way flights and $898 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Virgin Australia
Thu, Jan 1 - Tue, Jan 6
KGI
Kalgoorlie - Boulder
SYD
Sydney
$898 Roundtrip, found 4 days ago
$898
Roundtrip
found 4 days ago
Select Virgin Australia flight, departing Thu, Jan 1 from Kalgoorlie - Boulder to Sydney, returning Tue, Jan 6, priced at $898 found 4 days ago
Virgin Australia
Thu, Jan 1 - Tue, Jan 6
KGI
Kalgoorlie - Boulder
SYD
Sydney
$934 Roundtrip, found 4 days ago
$934
Roundtrip
found 4 days ago
Select Virgin Australia flight, departing Thu, Jan 1 from Kalgoorlie - Boulder to Sydney, returning Tue, Jan 6, priced at $934 found 4 days ago
Qantas Airways
Thu, Jan 1 - Tue, Jan 6
KGI
Kalgoorlie - Boulder
SYD
Sydney
$937 Roundtrip, found 4 days ago
$937
Roundtrip
found 4 days ago
Select Qantas Airways flight, departing Thu, Jan 1 from Kalgoorlie - Boulder to Sydney, returning Tue, Jan 6, priced at $937 found 4 days ago
Virgin Australia
Thu, Jan 1 - Tue, Jan 6
KGI
Kalgoorlie - Boulder
SYD
Sydney
$938 Roundtrip, found 4 days ago
$938
Roundtrip
found 4 days ago
Select Virgin Australia flight, departing Thu, Jan 1 from Kalgoorlie - Boulder to Sydney, returning Tue, Jan 6, priced at $938 found 4 days ago
Qantas Airways
Thu, Jan 1 - Tue, Jan 6
KGI
Kalgoorlie - Boulder
SYD
Sydney
$972 Roundtrip, found 4 days ago
$972
Roundtrip
found 4 days ago
Select Qantas Airways flight, departing Thu, Jan 1 from Kalgoorlie - Boulder to Sydney, returning Tue, Jan 6, priced at $972 found 4 days ago
Virgin Australia
Sat, Oct 11 - Sat, Oct 18
KGI
Kalgoorlie - Boulder
SYD
Sydney
$977 Roundtrip, found 3 days ago
$977
Roundtrip
found 3 days ago
Select Virgin Australia flight, departing Sat, Oct 11 from Kalgoorlie - Boulder to Sydney, returning Sat, Oct 18, priced at $977 found 3 days ago
Qantas Airways
Thu, Jan 1 - Tue, Jan 6
KGI
Kalgoorlie - Boulder
SYD
Sydney
$977 Roundtrip, found 4 days ago
$977
Roundtrip
found 4 days ago
Select Qantas Airways flight, departing Thu, Jan 1 from Kalgoorlie - Boulder to Sydney, returning Tue, Jan 6, priced at $977 found 4 days ago
Virgin Australia
Sat, Oct 11 - Sat, Oct 18
KGI
Kalgoorlie - Boulder
SYD
Sydney
$990 Roundtrip, found 3 days ago
$990
Roundtrip
found 3 days ago
Select Virgin Australia flight, departing Sat, Oct 11 from Kalgoorlie - Boulder to Sydney, returning Sat, Oct 18, priced at $990 found 3 days ago
Virgin Australia
Sat, Oct 11 - Sat, Oct 18
KGI
Kalgoorlie - Boulder
SYD
Sydney
$990 Roundtrip, found 3 days ago
$990
Roundtrip
found 3 days ago
Select Virgin Australia flight, departing Sat, Oct 11 from Kalgoorlie - Boulder to Sydney, returning Sat, Oct 18, priced at $990 found 3 days ago
Qantas Airways
Thu, Jan 1 - Tue, Jan 6
KGI
Kalgoorlie - Boulder
SYD
Sydney
$993 Roundtrip, found 4 days ago
$993
Roundtrip
found 4 days ago
Select Qantas Airways flight, departing Thu, Jan 1 from Kalgoorlie - Boulder to Sydney, returning Tue, Jan 6, priced at $993 found 4 days ago
Flights from Kalgoorlie - Boulder (KGI) to Sydney (SYD)
Origin airport
Kalgoorlie - Boulder
Destination airport
Kingsford Smith Intl.
Roundtrip price
$898
Distance
1741 mi

Kalgoorlie - Boulder to Sydney Flights

The cheapest times to fly from Kalgoorlie - Boulder to Sydney

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 Kalgoorlie - Boulder to Sydney are during the month of January. You can find some of the cheapest flights from Kalgoorlie - Boulder to Sydney with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Kalgoorlie - Boulder to Sydney

Sunday is one of the best days to book for cheap flights from Kalgoorlie - Boulder to Sydney: 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 Kalgoorlie - Boulder to Sydney

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 Kalgoorlie - Boulder to Sydney in 2025. You can also book with separate airlines for your outbound and return journeys, from $526 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 Kalgoorlie - Boulder to Sydney 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 Kalgoorlie - Boulder to Sydney 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.

 

Frequently asked questions

How much does a flight from Kalgoorlie - Boulder Airport (KGI) to Kingsford Smith Intl. Airport (SYD) cost?
Get a cheap one-way flight from $526 or cheap return flight from $898 from Kalgoorlie - Boulder Airport (KGI) to Kingsford Smith Intl. Airport (SYD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Kalgoorlie - Boulder Airport (KGI) to Kingsford Smith Intl. Airport (SYD)?
Traveling in January is a good way to save, as it's the cheapest month for flights between KGI and SYD. You'll often find the lowest fares during the off-season.
What is the cheapest airline that flies from Kalgoorlie - Boulder Airport (KGI) to Kingsford Smith Intl. Airport (SYD)?
To find the cheapest airline that'll fly you from KGI to SYD, use Expedia's filter tool. Customize your search based on what matters most to you, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Kalgoorlie - Boulder Airport (KGI) to Kingsford Smith Intl. Airport (SYD)?
You'll need to hop on a flight with a layover if you're traveling from Kalgoorlie - Boulder Airport (KGI) to Kingsford Smith Intl. Airport (SYD). 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 KGI to SYD?
Generally you'll find the largest variety of flight choices on a Friday. Tuesdays are often 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 Kalgoorlie - Boulder Airport (KGI) to Kingsford Smith Intl. Airport (SYD)?
To avoid possible delays on the Kalgoorlie - Boulder Airport (KGI) to Kingsford Smith Intl. Airport (SYD) route, aim to travel before 3 PM. Flights after this time have a 22% higher chance of cancellation.**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 Kalgoorlie - Boulder Airport (KGI) to Kingsford Smith Intl. Airport (SYD) last-minute?
Last-minute bookings from KGI to SYD are usually more expensive. For the cheapest rates, start searching for flights well in advance. That said, if you can play around with your travel dates, you may score a cheap ticket just before your departure.
Is it cheaper to book a KGI to SYD flight and hotel package?
You'll typically save money by securing a KGI to SYD flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. Once you've chosen your ideal flights and accommodations, you can add extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from Kalgoorlie - Boulder Airport (KGI) to Kingsford Smith Intl. Airport (SYD)?
In most cases, you're able to cancel or reschedule your KGI to SYD flight. However, there may be additional charges, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you'd like further details, go to our Customer Service portal.

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*Available to One Key members.