Alaska Airlines Cheap Flights from Portland to Australia
Deals on one-way flights from Portland to Australia.*
Portland (PDX)to
Sydney (SYD)Portland (PDX)to
Sydney (SYD)Portland (PDX)to
Sydney (SYD)Portland (PDX)to
Sydney (SYD)Portland (PDX)to
Sydney (SYD)*Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.
One-way low-fare flights Portland to Australia.*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Portland (PDX) | Sydney (SYD) | One-way | Saver | Depart: Aug 19, 2026 | From $679 Seen: 18 hours ago | |
| Portland (PDX) | Sydney (SYD) | One-way | Saver | Depart: Aug 22, 2026 | From $679 Seen: 18 hours ago | |
| Portland (PDX) | Sydney (SYD) | One-way | Saver | Depart: Aug 29, 2026 | From $679 Seen: 18 hours ago | |
| Portland (PDX) | Sydney (SYD) | One-way | Saver | Depart: Aug 30, 2026 | From $679 Seen: 18 hours ago | |
| Portland (PDX) | Sydney (SYD) | One-way | Saver | Depart: Sep 9, 2026 | From $679 Seen: 18 hours ago | |
| Portland (PDX) | Sydney (SYD) | One-way | Saver | Depart: Sep 10, 2026 | From $679 Seen: 18 hours ago |
*Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.