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 map.
Frequent Flyer Miles Calculator
Seattle (SEA) → Ketchikan (KTN).