How far is Ontario from Seattle?
There are several ways to calculate distances between Seattle and Ontario. Here are two common methods:Vincenty's formula (applied above)
- 956.132 miles
- 1538.746 kilometers
- 830.856 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
- 957.141 miles
- 1540.370 kilometers
- 831.733 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 Ontario International Airport (ONT) is 2 hours 18 minutes.
Time difference and current local times
There is no time difference between Seattle and Ontario.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 136 kg (300 pounds).
Seattle to Ontario flight map.
Frequent Flyer Miles Calculator
Seattle (SEA) → Ontario (ONT).