How far is St Louis, MO, from Ontario, CA?
The distance between Ontario (Ontario International Airport) and St Louis (St. Louis Lambert International Airport) is 1546 miles / 2488 kilometers / 1343 nautical miles.
The driving distance from Ontario (ONT) to St Louis (STL) is 1787 miles / 2876 kilometers, and travel time by car is about 31 hours 5 minutes.
Ontario International Airport – St. Louis Lambert International Airport
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Distance from Ontario to St Louis
There are several ways to calculate the distance from Ontario to St Louis. Here are two standard 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 planet.
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).
How long does it take to fly from Ontario to St Louis?
The estimated flight time from Ontario International Airport to St. Louis Lambert International Airport is 3 hours and 25 minutes.
What is the time difference between Ontario and St Louis?
The time difference between Ontario and St Louis is 2 hours. St Louis is 2 hours ahead of Ontario.
Flight carbon footprint between Ontario International Airport (ONT) and St. Louis Lambert International Airport (STL)
On average, flying from Ontario to St Louis generates about 182 kg of CO2 per passenger, and 182 kilograms equals 402 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.
Map of flight path and driving directions from Ontario to St Louis
See the map of the shortest flight path between Ontario International Airport (ONT) and St. Louis Lambert International Airport (STL).
Airport information
| Origin | Ontario International Airport |
|---|---|
| City: | Ontario, CA |
| Country: | United States  |
| IATA Code: | ONT |
| ICAO Code: | KONT |
| Coordinates: | 34°3′21″N, 117°36′3″W |
| Destination | St. Louis Lambert International Airport |
|---|---|
| City: | St Louis, MO |
| Country: | United States |
| IATA Code: | STL |
| ICAO Code: | KSTL |
| Coordinates: | 38°44′55″N, 90°22′12″W |