✈ SYD → SEA
15H 36M FROM SYDNEY TO SEATTLE. THIS IS NOT TRAVEL. THIS IS ENDURANCE.
Flight from Sydney to Seattle
From Kingsford Smith (SYD), Australia Oceania → Sea-Tac (SEA), USA North America
How long is the flight from Sydney to Seattle?
A nonstop flight from Sydney (SYD) to Seattle (SEA) 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
Sydney timezone
UTC+10
Australia/Sydney
Seattle timezone
UTC-7
America/Los_Angeles
Time difference
-17h
17 hours behind
Jet lag (rough)
~11.9d
Westward — easier
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.