Air Miles Calculator

Distance between Great Falls, MT (GTF) and Seattle, WA (SEA)

Distance from Great Falls (Great Falls International Airport) to Seattle (Seattle–Tacoma International Airport) is 512 miles / 824 kilometers / 445 nautical miles.

Calculations with different methods

Vincenty's formula (applied above)
  • 511.994 miles
  • 823.975 kilometers
  • 444.911 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
  • 510.492 miles
  • 821.557 kilometers
  • 443.605 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 Great Falls International Airport (GTF) to Seattle–Tacoma International Airport (SEA) is 1 hour 28 minutes.

Time difference and current local times

The time difference between Great Falls and Seattle is 1 hour. Seattle is 1 hour behind Great Falls.

Time Difference

Great Falls
Seattle

Great Falls, MT

 MDT

Seattle, WA

 PDT

Airport information


A Great Falls International Airport
City: Great Falls, MT
Country: United States Flag of United States
IATA Code: GTF
ICAO Code: KGTF
Coordinates: 47°28′55″N, 111°22′15″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

Great Falls to Seattle flight map.

Frequent Flyer Miles Calculator

Great Falls (GTF) → Seattle (SEA).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
512
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
512

Round trip?