Air Miles Calculator

Distance between St Louis, MO (STL) and Ontario, CA (ONT)

Distance from St Louis to Ontario (St. Louis Lambert International Airport – Ontario International Airport) is 1546 miles / 2488 kilometers / 1343 nautical miles.

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).

Flight duration

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.

Time Difference

St Louis
Ontario

St Louis, MO

 CST

Ontario, CA

 PST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 169 kg (373 pounds).

Airport information


A St. Louis Lambert International Airport
City: St Louis, MO
Country: United States Flag of United States
IATA Code: STL
ICAO Code: KSTL
Coordinates: 38°44′55″N, 90°22′12″W

B Ontario International Airport
City: Ontario, CA
Country: United States Flag of United States
IATA Code: ONT
ICAO Code: KONT
Coordinates: 34°3′21″N, 117°36′3″W

Map

St Louis to Ontario flight map.

Frequent Flyer Miles Calculator

St Louis (STL) → Ontario (ONT).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
1546
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
1546

Round trip?