How far is Sydney from Seattle, WA?

The distance between Seattle (Seattle–Tacoma International Airport) and Sydney (Sydney Airport) is 7739 miles / 12455 kilometers / 6725 nautical miles.

Distance from Seattle to Sydney

There are several ways to calculate the distance from Seattle to Sydney. Here are two standard methods:

Vincenty's formula (applied above)

• 7739.480 miles
• 12455.485 kilometers
• 6725.424 nautical miles

Vincenty's formula calculates the distance between latitude/longitude points on the earth's surface using an ellipsoidal model of the planet.

Haversine formula

• 7749.792 miles
• 12472.081 kilometers
• 6734.385 nautical miles

The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance – the shortest distance between two points).

How long does it take to fly from Seattle to Sydney?

The estimated flight time from Seattle–Tacoma International Airport to Sydney Airport is 15 hours and 9 minutes.

What is the time difference between Seattle and Sydney?

The time difference between Seattle and Sydney is 19 hours. Sydney is 19 hours ahead of Seattle.

Flight carbon footprint between Seattle–Tacoma International Airport (SEA) and Sydney Airport (SYD)

On average, flying from Seattle to Sydney generates about 960 kg of CO2 per passenger, and 960 kilograms equals 2 117 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Seattle to Sydney

See the map of the shortest flight path between Seattle–Tacoma International Airport (SEA) and Sydney Airport (SYD).

Airport information

Origin	Seattle–Tacoma International Airport
City:	Seattle, WA
Country:	United States
IATA Code:	SEA
ICAO Code:	KSEA
Coordinates:	47°26′56″N, 122°18′32″W

Destination	Sydney Airport
City:	Sydney
Country:	Australia
IATA Code:	SYD
ICAO Code:	YSSY
Coordinates:	33°56′45″S, 151°10′37″E