How far is Ontario, CA, from Lewistown, MT?

The distance between Lewistown (Lewistown Municipal Airport) and Ontario (Ontario International Airport) is 992 miles / 1597 kilometers / 862 nautical miles.

The driving distance from Lewistown (LWT) to Ontario (ONT) is 1223 miles / 1969 kilometers, and travel time by car is about 22 hours 13 minutes.

Distance from Lewistown to Ontario

There are several ways to calculate the distance from Lewistown to Ontario. Here are two standard methods:

Vincenty's formula (applied above)

• 992.178 miles
• 1596.755 kilometers
• 862.179 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

• 992.807 miles
• 1597.768 kilometers
• 862.726 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 Lewistown to Ontario?

The estimated flight time from Lewistown Municipal Airport to Ontario International Airport is 2 hours and 22 minutes.

What is the time difference between Lewistown and Ontario?

The time difference between Lewistown and Ontario is 1 hour. Ontario is 1 hour behind Lewistown.

Flight carbon footprint between Lewistown Municipal Airport (LWT) and Ontario International Airport (ONT)

On average, flying from Lewistown to Ontario generates about 150 kg of CO2 per passenger, and 150 kilograms equals 331 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path and driving directions from Lewistown to Ontario

See the map of the shortest flight path between Lewistown Municipal Airport (LWT) and Ontario International Airport (ONT).

Airport information

Origin	Lewistown Municipal Airport
City:	Lewistown, MT
Country:	United States
IATA Code:	LWT
ICAO Code:	KLWT
Coordinates:	47°2′57″N, 109°28′1″W

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