Nonstop flight route between Ontario (near Los Angeles), California, United States and SeaTac (near Seattle and Tacoma), Washington, United States:
Departure Airport:

Arrival Airport:

Distance from ONT to SEA:
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- About this route
- ONT Airport Information
- SEA Airport Information
- Facts about ONT
- Facts about SEA
- Map of Nearest Airports to ONT
- List of Nearest Airports to ONT
- Map of Furthest Airports from ONT
- List of Furthest Airports from ONT
- Map of Nearest Airports to SEA
- List of Nearest Airports to SEA
- Map of Furthest Airports from SEA
- List of Furthest Airports from SEA
About this route:
A direct, nonstop flight between LA/Ontario International Airport (ONT), Ontario (near Los Angeles), California, United States and Seattle–Tacoma International Airport (SEA), SeaTac (near Seattle and Tacoma), Washington, United States would travel a Great Circle distance of 957 miles (or 1,540 kilometers).
A Great Circle is the shortest distance between 2 points on a sphere. Because most world maps are flat (but the Earth is round), the route of the shortest distance between 2 points on the Earth will often appear curved when viewed on a flat map, especially for long distances. If you were to simply draw a straight line on a flat map and measure a very long distance, it would likely be much further than if you were to lay a string between those two points on a globe. Because of the relatively short distance between LA/Ontario International Airport and Seattle–Tacoma International Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
IATA / ICAO Codes: | ONT / KONT |
Airport Name: | LA/Ontario International Airport |
Location: | Ontario (near Los Angeles), California, United States |
GPS Coordinates: | 34°3'21"N by 117°36'3"W |
Area Served: | Ontario, California / Inland Empire, California |
Operator/Owner: | Los Angeles World Airports |
Airport Type: | Public |
Elevation: | 944 feet (288 meters) |
# of Runways: | 2 |
View all routes: | Routes from ONT |
More Information: | ONT Maps & Info |
Arrival Airport Information:
IATA / ICAO Codes: | SEA / KSEA |
Airport Names: |
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Location: | SeaTac (near Seattle and Tacoma), Washington, United States |
GPS Coordinates: | 47°26'56"N by 122°18'33"W |
Area Served: | Seattle; Tacoma, Washington, US |
Airport Type: | Public |
Elevation: | 433 feet (132 meters) |
# of Runways: | 3 |
View all routes: | Routes from SEA |
More Information: | SEA Maps & Info |
Facts about LA/Ontario International Airport (ONT):
- LA/Ontario International Airport (ONT) has 2 runways.
- In 1923, a landing field was established east of Central Avenue west of the current airport) on land leased from the Union Pacific Railroad.
- ONT currently has more than 64 daily departures and arrivals.
- Because of LA/Ontario International Airport's relatively low elevation of 944 feet, planes can take off or land at LA/Ontario International Airport at a lower air speed than at airports located at a higher elevation. This is because the air density is higher closer to sea level than it would otherwise be at higher elevations.
- LA/Ontario International Airport handled 4,812,006 passengers last year.
- Terminal 2 has 265,000 square feet and 12 gates.
- The furthest airport from LA/Ontario International Airport (ONT) is Pierrefonds Airport (ZSE), which is located 11,460 miles (18,443 kilometers) away in Saint-Pierre, Réunion.
- The closest airport to LA/Ontario International Airport (ONT) is Chino Airport (CNO), which is located only 6 miles (10 kilometers) SSW of ONT.
- LA/Ontario has few noise restrictions/abatement rules, unlike other Southern California airports such as John Wayne Airport, Bob Hope Airport, Long Beach Airport, and San Diego International Airport, which all have very strict policies.
Facts about Seattle–Tacoma International Airport (SEA):
- Seattle–Tacoma International Airport (SEA) has 3 runways.
- The Seattle–Tacoma International Airport, also known as Sea–Tac Airport or Sea–Tac /ˈsiːtæk/, is an American airport.
- Seattle–Tacoma International Airport handled 34,776,666 passengers last year.
- The closest airport to Seattle–Tacoma International Airport (SEA) is Renton Municipal Airport (RNT), which is located only 5 miles (9 kilometers) NE of SEA.
- Seattle's Central Link light-rail line serves the airport at the SeaTac/Airport Station, which opened on December 19, 2009.
- Because of Seattle–Tacoma International Airport's relatively low elevation of 433 feet, planes can take off or land at Seattle–Tacoma International Airport at a lower air speed than at airports located at a higher elevation. This is because the air density is higher closer to sea level than it would otherwise be at higher elevations.
- The airport has a Central Terminal building, which was renovated and expanded in 2003.
- The furthest airport from Seattle–Tacoma International Airport (SEA) is Tôlanaro Airport (FTU), which is located 10,781 miles (17,350 kilometers) away in Tôlanaro, Madagascar.
- Starting in the late 1980s, the Port of Seattle and a council representing local county governments considered the future of air traffic in the region and predicted that airport could reach capacity by 2000.
- The airport was constructed by the Port of Seattle in 1944 to serve civilians of the region, after the U.S.
- In addition to being known as "Seattle–Tacoma International Airport", another name for SEA is "Sea–Tac Airport".