How far is Seattle, WA, from Belfast?

The distance between Belfast (Belfast International Airport) and Seattle (Seattle Boeing Field) is 4473 miles / 7198 kilometers / 3887 nautical miles.

Distance from Belfast to Seattle

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

Vincenty's formula (applied above)

• 4472.741 miles
• 7198.178 kilometers
• 3886.705 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

• 4459.008 miles
• 7176.078 kilometers
• 3874.772 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 Belfast to Seattle?

The estimated flight time from Belfast International Airport to Seattle Boeing Field is 8 hours and 58 minutes.

What is the time difference between Belfast and Seattle?

The time difference between Belfast and Seattle is 8 hours. Seattle is 8 hours behind Belfast.

Flight carbon footprint between Belfast International Airport (BFS) and Seattle Boeing Field (BFI)

On average, flying from Belfast to Seattle generates about 516 kg of CO2 per passenger, and 516 kilograms equals 1 137 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Belfast to Seattle

See the map of the shortest flight path between Belfast International Airport (BFS) and Seattle Boeing Field (BFI).

Airport information

Origin	Belfast International Airport
City:	Belfast
Country:	United Kingdom
IATA Code:	BFS
ICAO Code:	EGAA
Coordinates:	54°39′27″N, 6°12′56″W

Destination	Seattle Boeing Field
City:	Seattle, WA
Country:	United States
IATA Code:	BFI
ICAO Code:	KBFI
Coordinates:	47°31′47″N, 122°18′7″W