How far is Belfast from Seattle, WA?

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

Distance from Seattle to Belfast

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

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

What is the time difference between Seattle and Belfast?

The time difference between Seattle and Belfast is 8 hours. Belfast is 8 hours ahead of Seattle.

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

On average, flying from Seattle to Belfast 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 Seattle to Belfast

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

Airport information

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

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