Calculations with different methods
- 898.758 miles
- 1446.411 kilometers
- 781.000 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
- 897.839 miles
- 1444.932 kilometers
- 780.201 nautical miles
The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance).
Estimated flight time from Roberts Field (RDM) to Ketchikan International Airport (KTN) is 2 hours 12 minutes.
Time difference and current local times
The time difference between Redmond and Ketchikan is 1 hour. Ketchikan is 1 hour behind Redmond.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 131 kg (289 pounds).
Redmond to Ketchikan flight map.
Frequent Flyer Miles Calculator
Redmond (RDM) → Ketchikan (KTN).