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How far is Ontario, CA, from St Louis, MO?

The distance between St Louis (St. Louis Lambert International Airport) and Ontario (Ontario International Airport) is 1546 miles / 2488 kilometers / 1343 nautical miles.

The driving distance from St Louis (STL) to Ontario (ONT) is 1789 miles / 2879 kilometers, and travel time by car is about 31 hours 1 minutes.

St. Louis Lambert International Airport – Ontario International Airport

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1546
Miles
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2488
Kilometers
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1343
Nautical miles

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Distance from St Louis to Ontario

There are several ways to calculate the distance from St Louis to Ontario. 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 St Louis to Ontario?

The estimated flight time from St. Louis Lambert International Airport to Ontario International Airport is 3 hours and 25 minutes.

Flight carbon footprint between St. Louis Lambert International Airport (STL) and Ontario International Airport (ONT)

On average, flying from St Louis to Ontario 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 St Louis to Ontario

See the map of the shortest flight path between St. Louis Lambert International Airport (STL) and Ontario International Airport (ONT).

Airport information

Origin 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
Destination 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