How far is Lannion from Seattle, WA?

The distance between Seattle (Seattle–Tacoma International Airport) and Lannion (Lannion – Côte de Granit Airport) is 4864 miles / 7828 kilometers / 4227 nautical miles.

Distance from Seattle to Lannion

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

Vincenty's formula (applied above)

• 4864.060 miles
• 7827.946 kilometers
• 4226.753 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

• 4849.847 miles
• 7805.073 kilometers
• 4214.402 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 Lannion?

The estimated flight time from Seattle–Tacoma International Airport to Lannion – Côte de Granit Airport is 9 hours and 42 minutes.

What is the time difference between Seattle and Lannion?

The time difference between Seattle and Lannion is 9 hours. Lannion is 9 hours ahead of Seattle.

Flight carbon footprint between Seattle–Tacoma International Airport (SEA) and Lannion – Côte de Granit Airport (LAI)

On average, flying from Seattle to Lannion generates about 566 kg of CO2 per passenger, and 566 kilograms equals 1 248 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Seattle to Lannion

See the map of the shortest flight path between Seattle–Tacoma International Airport (SEA) and Lannion – Côte de Granit Airport (LAI).

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	Lannion – Côte de Granit Airport
City:	Lannion
Country:	France
IATA Code:	LAI
ICAO Code:	LFRO
Coordinates:	48°45′15″N, 3°28′17″W