How far is Ontario, CA, from Seattle, WA?
The distance between Seattle (Seattle–Tacoma International Airport) and Ontario (Ontario International Airport) is 956 miles / 1539 kilometers / 831 nautical miles.
The driving distance from Seattle (SEA) to Ontario (ONT) is 1160 miles / 1867 kilometers, and travel time by car is about 21 hours 56 minutes.
Seattle–Tacoma International Airport – Ontario International Airport
Search flights
Distance from Seattle to Ontario
There are several ways to calculate the distance from Seattle to Ontario. Here are two standard 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 planet.
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?
The estimated flight time from Seattle–Tacoma International Airport to Ontario International Airport is 2 hours and 18 minutes.
What is the 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, and 148 kilograms equals 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
See the map of the 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 |
Airlines flying from Seattle (SEA) to Ontario (ONT)
| Alaska Airlines |
| American Airlines |