Alaska Airlines Cheap Flights from Seattle to Australia
Deals on one-way flights from Seattle to Australia.*
Seattle (SEA)to
Sydney (SYD)Seattle (SEA)to
Sydney (SYD)Seattle (SEA)to
Sydney (SYD)Seattle (SEA)to
Sydney (SYD)Seattle (SEA)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 Seattle to Australia.*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Seattle (SEA) | Sydney (SYD) | One-way | Saver | Depart: Aug 20, 2026 | From $744 Seen: 18 hours ago | |
| Seattle (SEA) | Sydney (SYD) | One-way | Saver | Depart: Aug 22, 2026 | From $744 Seen: 18 hours ago | |
| Seattle (SEA) | Sydney (SYD) | One-way | Saver | Depart: Aug 26, 2026 | From $744 Seen: 18 hours ago | |
| Seattle (SEA) | Sydney (SYD) | One-way | Saver | Depart: Aug 27, 2026 | From $744 Seen: 18 hours ago | |
| Seattle (SEA) | Sydney (SYD) | One-way | Saver | Depart: Aug 28, 2026 | From $744 Seen: 18 hours ago | |
| Seattle (SEA) | Sydney (SYD) | One-way | Saver | Depart: Sep 3, 2026 | From $744 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.