$426 Cheap Flights from Redmond (RDM) to Sydney (SYD)

View $426 flight on Tue, Mar 17, 2026Opens in a new window

Popular airlines from Redmond Municipal Airport (RDM) to Sydney Airport (SYD)

Cheap Flights from Redmond to Sydney (RDM-SYD)

Prices were available within the past 7 days and start at $426 for one-way flights and $867 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Apr 17 - Thu, Apr 23
RDM
Redmond
SYD
Sydney
$867 Roundtrip, found 6 days ago
$867
Roundtrip
found 6 days ago
Select United flight, departing Fri, Apr 17 from Redmond to Sydney, returning Thu, Apr 23, priced at $867 found 6 days ago
United
Sat, Feb 21 - Sat, Mar 7
RDM
Redmond
SYD
Sydney
$883 Roundtrip, found 5 days ago
$883
Roundtrip
found 5 days ago
Select United flight, departing Sat, Feb 21 from Redmond to Sydney, returning Sat, Mar 7, priced at $883 found 5 days ago
United
Sat, Feb 21 - Sat, Mar 7
RDM
Redmond
SYD
Sydney
$889 Roundtrip, found 5 days ago
$889
Roundtrip
found 5 days ago
Select United flight, departing Sat, Feb 21 from Redmond to Sydney, returning Sat, Mar 7, priced at $889 found 5 days ago
United
Tue, Mar 17 - Thu, Mar 26
RDM
Redmond
SYD
Sydney
$898 Roundtrip, found 2 hours ago
$898
Roundtrip
found 2 hours ago
Select United flight, departing Tue, Mar 17 from Redmond to Sydney, returning Thu, Mar 26, priced at $898 found 2 hours ago
United
Sat, Mar 14 - Wed, Mar 25
RDM
Redmond
SYD
Sydney
$904 Roundtrip, found 13 hours ago
$904
Roundtrip
found 13 hours ago
Select United flight, departing Sat, Mar 14 from Redmond to Sydney, returning Wed, Mar 25, priced at $904 found 13 hours ago
United
Sat, Mar 14 - Wed, Mar 25
RDM
Redmond
SYD
Sydney
$910 Roundtrip, found 13 hours ago
$910
Roundtrip
found 13 hours ago
Select United flight, departing Sat, Mar 14 from Redmond to Sydney, returning Wed, Mar 25, priced at $910 found 13 hours ago
Alaska Airlines
Tue, Sep 1 - Tue, Sep 8
RDM
Redmond
SYD
Sydney
$1,023 Roundtrip, found 4 days ago
$1,023
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Tue, Sep 1 from Redmond to Sydney, returning Tue, Sep 8, priced at $1,023 found 4 days ago
Delta
Tue, Mar 17 - Thu, Mar 26
RDM
Redmond
SYD
Sydney
$1,103 Roundtrip, found 2 hours ago
$1,103
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Mar 17 from Redmond to Sydney, returning Thu, Mar 26, priced at $1,103 found 2 hours ago
American Airlines
Mon, Dec 1 - Wed, Dec 17
RDM
Redmond
SYD
Sydney
$1,399 Roundtrip, found 14 hours ago
$1,399
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Mon, Dec 1 from Redmond to Sydney, returning Wed, Dec 17, priced at $1,399 found 14 hours ago
Korean Air
Tue, Sep 1 - Tue, Sep 8
RDM
Redmond
SYD
Sydney
$2,092 Roundtrip, found 4 days ago
$2,092
Roundtrip
found 4 days ago
Select Korean Air flight, departing Tue, Sep 1 from Redmond to Sydney, returning Tue, Sep 8, priced at $2,092 found 4 days ago

Frequently asked questions

How much does a flight from Robert's Field Airport (RDM) to Kingsford Smith Intl. Airport (SYD) cost?
Secure a cheap one-way flight from $426 or cheap return flight from $867 from Robert's Field Airport (RDM) to Kingsford Smith Intl. Airport (SYD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Robert's Field Airport (RDM) to Kingsford Smith Intl. Airport (SYD)?
April is the most affordable month to fly from RDM to SYD. Planning your trip for the off-season is often the key to landing a great deal.
What is the cheapest airline that flies from Robert's Field Airport (RDM) to Kingsford Smith Intl. Airport (SYD)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll take you from RDM to SYD. Then, sort your results by "Price (lowest to highest)" to snag a great deal.
How many flights per day from Robert's Field Airport (RDM) to Kingsford Smith Intl. Airport (SYD)?
There aren't any daily nonstop flights departing from Robert's Field Airport (RDM) to Kingsford Smith Intl. Airport (SYD). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way in no time.
What day of the week has the most flights from RDM to SYD?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Robert's Field Airport (RDM) to Kingsford Smith Intl. Airport (SYD)?
Select a flight from Robert's Field Airport (RDM) to Kingsford Smith Intl. Airport (SYD) that takes off before 3 PM to reduce the risk of cancellations and delays. Departures after this hour have a 22% higher chance of being canceled, on average.**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 Robert's Field Airport (RDM) to Kingsford Smith Intl. Airport (SYD) last-minute?
Last-minute fares from RDM to SYD are usually more expensive. To secure the lowest rates, start looking for flights well ahead of time. That said, if you're flexible with your travel dates, you may find a cheap fare right before your trip.
Is it cheaper to book a RDM to SYD flight and hotel package?
You'll typically save money by securing a RDM to SYD flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. Once you've selected your preferred accommodations and flights, you can add extras such as activities, tours and car rentals.
Can I cancel or change the date of my flight from Robert's Field Airport (RDM) to Kingsford Smith Intl. Airport (SYD)?
Generally, it's possible to cancel or reschedule your RDM to SYD flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Robert's Field
Destination airport
Kingsford Smith Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Korean Air, Qatar Airways, United
Roundtrip price
$866
Distance
7699 mi

Book with confidence

Redmond to Sydney Flights

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

 

The best time to book a flight from Redmond to Sydney

Sunday is one of the best days to book for cheap flights from Redmond 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 Redmond 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 Redmond to Sydney in 2025. You can also book with separate airlines for your outbound and return journeys, from $426 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 Redmond 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 Redmond 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.

 

Redmond to Sydney Flights

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*Available to One Key members.