# Distance between Seattle, WA (SEA) and Ontario, CA (ONT)

Flight distance from Seattle to Ontario (Seattle–Tacoma International Airport – Ontario International Airport) is 956 miles / 1539 kilometers / 831 nautical miles. Estimated flight time is 2 hours 18 minutes.

Driving distance from Seattle (SEA) to Ontario (ONT) is 1162 miles / 1870 kilometers and travel time by car is about 22 hours 1 minutes.

956
Miles
1539
Kilometers
831
Nautical miles
2 h 18 min
148 kg

## How far is Ontario from Seattle?

There are several ways to calculate distances between Los Angeles and Chicago. Here are two common methods:

Vincenty's formula (applied above)
• 956.132 miles
• 1538.746 kilometers
• 830.856 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
• 957.141 miles
• 1540.370 kilometers
• 831.733 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 Seattle to Ontario?

Estimated flight time from Seattle–Tacoma International Airport to Ontario International Airport is 2 hours 18 minutes.

## What is the time difference between Seattle and Ontario?

There is no time difference between Seattle and Ontario.

## Flight carbon footprint between Seattle–Tacoma International Airport (SEA) and Ontario International Airport (ONT)

On average flying from Seattle to Ontario generates about 148 kg of CO2 per passenger, 148 kilograms is equal to 326 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

## Map of flight path and driving directions from Seattle to Ontario

Shortest flight path between Seattle–Tacoma International Airport (SEA) and Ontario International Airport (ONT).

## Airport information

Origin Seattle–Tacoma International Airport
City: Seattle, WA
Country: United States
IATA Code: SEA
ICAO Code: KSEA
Coordinates: 47°26′56″N, 122°18′32″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