How far is Ketchikan from Seattle?
There are several ways to calculate distances between Seattle and Ketchikan. 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 Seattle–Tacoma International Airport (SEA) to Ketchikan International Airport (KTN) is 1 hour 47 minutes.
Time difference and current local times
The time difference between Seattle and Ketchikan is 1 hour. Ketchikan is 1 hour behind Seattle.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 122 kg (270 pounds).
Seattle to Ketchikan flight path
Shortest flight path between Seattle–Tacoma International Airport (SEA) and Ketchikan International Airport (KTN).
Frequent Flyer Miles Calculator
Seattle (SEA) → Ketchikan (KTN).