Map of flight path and driving directions from Seattle to Ketchikan.
Shortest flight path between Seattle Boeing Field (BFI) and Ketchikan International Airport (KTN).
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)
- 675.412 miles
- 1086.971 kilometers
- 586.917 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
- 674.410 miles
- 1085.357 kilometers
- 586.046 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).
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 (269 pounds).
Frequent Flyer Miles Calculator
Seattle (BFI) → Ketchikan (KTN).