✈ SEA → SYD
15H 36M IN ECONOMY = A FELONY AGAINST YOURSELF. UPGRADE.
Flight from Seattle to Sydney
From Sea-Tac (SEA), USA North America → Kingsford Smith (SYD), Australia Oceania
↔ Flying the other way? Sydney → Seattle
How long is the flight from Seattle to Sydney?
A nonstop flight from Seattle (SEA) to Sydney (SYD) takes about 15 hours 36 minutes, covering a great-circle distance of 7,750 miles (12,472 km). Actual scheduled time varies by airline, routing, and wind — expect ±15 to 30 minutes from this estimate.
Avg flight time
15h 36m
Nonstop, scheduled
Distance
7,750 mi
12,472 km · great-circle
Avg speed
800 km/h
Door-to-door including taxi
Time zones & jet lag
Seattle timezone
UTC-7
America/Los_Angeles
Sydney timezone
UTC+10
Australia/Sydney
Time difference
+17h
17 hours ahead
Jet lag (rough)
~17d
Eastward — worse
CO₂ footprint per passenger
Economy class, single passenger. Source: DEFRA 2024 averages.
This flight emits roughly 3.6× the CO₂ of an equivalent train trip and 0.9× a car driven alone over the same distance.
Flights from Seattle
Nearest destinations
- Seattle → Vancouver
- Seattle → San Francisco
- Seattle → Las Vegas
- Seattle → Los Angeles
- Seattle → Dallas
- Seattle → Chicago
- Seattle → Toronto
- Seattle → Atlanta
- Seattle → Mexico City
- Seattle → New York
Long-haul from Seattle
- Seattle → Johannesburg
- Seattle → Cape Town
- Seattle → Nairobi
- Seattle → Melbourne
- Seattle → Bali (Denpasar)
- Seattle → Kuala Lumpur
- Seattle → Singapore
- Seattle → Mumbai
- Seattle → Abu Dhabi
- Seattle → Bangkok
More flights to Oceania
Flights to Sydney
Nearest origins
- Melbourne → Sydney
- Auckland → Sydney
- Bali (Denpasar) → Sydney
- Manila → Sydney
- Singapore → Sydney
- Kuala Lumpur → Sydney
- Taipei → Sydney
- Hong Kong → Sydney
- Bangkok → Sydney
- Osaka → Sydney
Long-haul to Sydney
- Lisbon → Sydney
- Casablanca → Sydney
- Madrid → Sydney
- Dublin → Sydney
- Barcelona → Sydney
- London → Sydney
- Manchester → Sydney
- Paris → Sydney
- Edinburgh → Sydney
- Brussels → Sydney