The flight distance from Ontario Municipal Airport (ONO) in Ontario, United States to St Louis Lambert International Airport (STL) in St Louis, United States is 2,287 kilometers (1,421 miles / 1,235 nautical miles). The estimated flight time for this route is approximately 4h, flying east at a heading of 96°.

This is a medium-haul route that may be operated by either narrow-body or wide-body aircraft depending on demand. Passengers can expect a meal service on most carriers.

This is a domestic route within United States. Both airports operate in the same country, which may simplify travel requirements and documentation. Despite being a domestic route, there is a 1-hour time difference between the two cities.

Time zone information: When it's 18:20 in Ontario, it's 19:20 in St Louis.

There is a significant elevation difference of 1,576 feet between the two airports. St Louis Lambert International Airport sits lower than Ontario Municipal Airport.

The return flight from St Louis (STL) to Ontario (ONO) follows a heading of 293° (west northwest). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Ontario Municipal Airport (ONO) and St Louis Lambert International Airport (STL) detail pages, or use our flight duration calculator to compare other routes.