Alaska Airlines
Flights from Seattle to Sydney
SEA SYD · Australia
From
£937
return · 1 adult · economy
Operated by
Alaska Airlines
Shortest outbound
17h 50m
Direct option
No (connecting only)
Live offers
Sample sail-date: 2026-10-10 outbound · 2026-10-17 return. Prices refresh daily.
- SEA07:0018:50SYD17h 50m1 stop· Alaska AirlinesReturn20:45 → 06:041 stop · —£937Book on search →
- SEA07:0018:50SYD17h 50m1 stop· Alaska AirlinesReturn20:45 → 08:131 stop · —£950Book on search →
- SEA07:0018:50SYD17h 50m1 stop· Alaska AirlinesReturn20:45 → 15:551 stop · —£950Book on search →
Frequently asked questions
- How long is a flight from Seattle to Sydney with Alaska Airlines?
- The shortest current offer is 17h 50m outbound from SEA to SYD. On the sample dates we only see connecting options — try other dates for direct flights.
- Does Alaska Airlines fly direct from SEA to SYD?
- Not on these sample dates — the cheapest offers we see are connecting flights. Direct service may exist on other dates.
- How much does a Alaska Airlines ticket from SEA to SYD cost?
- The cheapest return economy fare we found today is £937 for 1 adult, based on sample dates 2026-10-10 → 2026-10-17. Prices change daily — run the live search for current fares.