How far is Seattle from Ketchikan?
There are several ways to calculate distances between Ketchikan and Seattle. Here are two common methods:Vincenty's formula (applied above)
- 679.917 miles
- 1094.220 kilometers
- 590.831 nautical miles
Vincenty's formula calculates the distance between latitude/longitude points on the earth’s surface, using an ellipsoidal model of the earth.Haversine formula
- 678.919 miles
- 1092.615 kilometers
- 589.965 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).
Estimated flight time from Ketchikan International Airport (KTN) to Seattle–Tacoma International Airport (SEA) is 1 hour 47 minutes.
Time difference and current local times
The time difference between Ketchikan and Seattle is 1 hour. Seattle is 1 hour ahead of Ketchikan.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 122 kg (270 pounds).
Ketchikan to Seattle flight path
Shortest flight path between Ketchikan International Airport (KTN) and Seattle–Tacoma International Airport (SEA).
Frequent Flyer Miles Calculator
Ketchikan (KTN) → Seattle (SEA).