Earn point on your loyalty program!arrow arc left

Cheap flights from Portland (PDX) to Sydney (SYD)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from Portland (PDX) to Sydney (SYD)

How to find the cheapest flight from Portland (PDX) to Sydney (SYD)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Portland (PDX) to Sydney (SYD)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Portland (PDX) to Sydney (SYD)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.

Cheap flights from Portland to Sydney in August , September 2026

29 Aug - 20 Sep $ 1,145.00
PDX
Portland
Alaska Airlines
1 STOPS
SYD
Sydney
SYD
Sydney
Alaska Airlines
1 STOPS
PDX
Portland
Pick dates
24 Aug - 08 Sep $ 1,471.00
PDX
Portland
Alaska Airlines
1 STOPS
SYD
Sydney
SYD
Sydney
Alaska Airlines
2 STOPS
PDX
Portland
Pick dates
24 Aug - 04 Sep $ 1,665.00
PDX
Portland
Alaska Airlines
1 STOPS
SYD
Sydney
SYD
Sydney
Alaska Airlines
1 STOPS
PDX
Portland
Pick dates

Last minute flights from Portland to Sydney

26 Aug - 31 Aug $ 1,688.00
PDX
Portland
United Airlines
2 STOPS
SYD
Sydney
SYD
Sydney
United Airlines
1 STOPS
PDX
Portland
Pick dates
21 Aug - 31 Aug $ 1,725.00
PDX
Portland
Air New Zealand
2 STOPS
SYD
Sydney
SYD
Sydney
Air New Zealand
1 STOPS
PDX
Portland
Pick dates
24 Aug - 31 Aug $ 2,145.00
PDX
Portland
Air Canada
1 STOPS
SYD
Sydney
SYD
Sydney
Air Canada
1 STOPS
PDX
Portland
Pick dates

One-way flights to Sydney from Portland

8:00 AM - 12:00 PM
Alaska Airlines
1 Stops
17h 50m
PDX - SYD
$ 578
Kiwi
Pick dates
8:00 AM - 12:00 PM
Alaska Airlines
1 Stops
17h 50m
PDX - SYD
$ 578
Kiwi
Pick dates
8:00 AM - 12:00 PM
Alaska Airlines
1 Stops
17h 50m
PDX - SYD
$ 634
Kiwi
Pick dates

How to find the cheapest flight from Portland (PDX) to Sydney (SYD)

Related info for your journey
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Portland (PDX) to Sydney (SYD)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Portland (PDX) to Sydney (SYD)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.