How far is Seattle, WA, from Sydney?

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

Distance from Sydney to Seattle

There are several ways to calculate the distance from Sydney to Seattle. 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 Sydney to Seattle?

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

What is the time difference between Sydney and Seattle?

The time difference between Sydney and Seattle is 19 hours. Seattle is 19 hours behind Sydney.

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

On average, flying from Sydney to Seattle 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 Sydney to Seattle

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

Airport information

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

Destination	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