How far is Ontario from St Louis?
There are several ways to calculate distances between St Louis and Ontario. Here are two common methods:Vincenty's formula (applied above)
- 1545.851 miles
- 2487.806 kilometers
- 1343.308 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
- 1542.599 miles
- 2482.572 kilometers
- 1340.482 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 St. Louis Lambert International Airport (STL) to Ontario International Airport (ONT) is 3 hours 25 minutes.
Time difference and current local times
The time difference between St Louis and Ontario is 2 hours. Ontario is 2 hours behind St Louis.
St Louis, MO
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 169 kg (373 pounds).
St Louis to Ontario flight map.
Frequent Flyer Miles Calculator
St Louis (STL) → Ontario (ONT).