Air Miles Calculator

Distance between Ketchikan, AK (KTN) and Seattle, WA (SEA)

Distance from Ketchikan International Airport to Seattle–Tacoma International Airport is 680 miles / 1094 kilometers / 591 nautical miles.

Calculations with different 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).

Flight duration

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.

Time Difference

Ketchikan
Seattle

Ketchikan, AK

 AKST

Seattle, WA

 PST

Airport information


A Ketchikan International Airport
City: Ketchikan, AK
Country: United States Flag of United States
IATA Code: KTN
ICAO Code: PAKT
Coordinates: 55°21′19″N, 131°42′38″W

B Seattle–Tacoma International Airport
City: Seattle, WA
Country: United States Flag of United States
IATA Code: SEA
ICAO Code: KSEA
Coordinates: 47°26′56″N, 122°18′32″W

Map

Flight map from Ketchikan to Seattle.

Frequent Flyer Miles Calculator

Ketchikan (KTN) → Seattle (SEA).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
680
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
680

Round trip?