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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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1546
Miles
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2488
Kilometers
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1343
Nautical miles

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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.

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 Flag of 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 Flag of United States
IATA Code: STL
ICAO Code: KSTL
Coordinates: 38°44′55″N, 90°22′12″W