* Distance: 1,600 miles
* Driving time: Approximately 24 hours
* Route: Take I-84 east from Boise to Salt Lake City, UT. Then take I-70 east to St. Louis, MO. Continue on I-44 east to Oklahoma City, OK. Finally, take I-40 east to Austin.
Route 2: Via I-20
* Distance: 1,700 miles
* Driving time: Approximately 25 hours
* Route: Take I-84 east from Boise to Salt Lake City, UT. Then take I-70 east to Kansas City, MO. Continue on I-70 east to St. Louis, MO. Finally, take I-20 east to Austin.
Route 3: Via US-287
* Distance: 1,800 miles
* Driving time: Approximately 26 hours
* Route: Take US-20 east from Boise to Grand Junction, CO. Then take US-50 east to Pueblo, CO. Continue on US-287 south to Amarillo, TX. Finally, take I-40 east to Austin.
When comparing these routes, the I-40 route is the fastest, the I-20 route is the longest, and the US-287 route is the most scenic. The best route for you will depend on your preferences and the time of year you are traveling.
