The flight distance from Idaho Falls Regional Airport (IDA) in Idaho Falls, United States to St Louis Lambert International Airport (STL) in St Louis, United States is 1,887 kilometers (1,172 miles / 1,019 nautical miles). The estimated flight time for this route is approximately 3h, flying east at a heading of 99°.

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 09:25 in Idaho Falls, it's 10:25 in St Louis.

There is a significant elevation difference of 4,126 feet between the two airports. St Louis Lambert International Airport sits lower than Idaho Falls Regional Airport.

The return flight from St Louis (STL) to Idaho Falls (IDA) 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 Idaho Falls Regional Airport (IDA) and St Louis Lambert International Airport (STL) detail pages, or use our flight duration calculator to compare other routes.