Shortest distance between Post Falls and Idaho Falls is 377.74 miles (607.91 km).
Flight distance from Post Falls, ID to Idaho Falls, ID is 377.74 miles. Estimated flight time is 00 hours 59 minutes.
It takes 00 hours 53 minutes to travel from Post Falls to Idaho Falls with an airplane (average speed of 550 miles).
The driving distance from Post Falls, Idaho to Idaho Falls, Idaho is: 490.42 miles (789.26 km) by car.
Driving from Post Falls to Idaho Falls will take approximately 07 hours 18 minutes.
The distance between Post Falls and Idaho Falls is 789 km if you choose to drive by road. You can go 08 hours 46 minutes if you drive your car at an average speed of 90 kilometers / hour. For different choices, please review the avg. speed travel time table on the below.
Please keep in mind that there is a 1 hour time gap between Post Falls, ID and Idaho Falls, ID. The current time in Post Falls is 08:09:50, although it is 09:09:50 in Idaho Falls.
|Average Speed||Travel Time|
|30 mph (48.3 km/h)||16 hours 20 minutes|
|40 mph (64.37 km/h)||12 hours 15 minutes|
|50 mph (80.47 km/h)||09 hours 48 minutes|
|60 mph (96.56 km/h)||08 hours 10 minutes|
|70 mph (112.65 km/h)||07 hours 00 minutes|
|75 mph (120.7 km/h)||06 hours 32 minutes|
|80 mph (128.75 km/h)||06 hours 07 minutes|
A car with a fuel efficiency of 8.3 l/100 km will need 65.51 liters (17.31 gallon) of gas to cover the route between Post Falls and Idaho Falls.
The estimated cost of gas to go from Post Falls to Idaho Falls is $57.49 (diesel $63.53).
Take a look at our Gas Cost Calculator feature. It will figure out how much it will cost to drive this particular distance.
The average gas price per gallon of daily gas for calculations is $3.322 (Diesel $3.671) /gallon. Last changed prices on October 25, 2021.
The place names are translated into coordinates to approximate the distance between Post Falls and Idaho Falls (latitude and longitude). Cities, states, and countries each have their own regional center. The Haversine formula is used to measure the radius.