It's not the shortest or fastest route, but if you're going that way, Artois CA is halfway. Oddly enough, it's also on I-5 southbound.
Independence, California is about the halfway point.
Las Vegas is generally considered the halfway point between Salt Lake City and Las Vegas.
The pacific ocean
Las Vegas
The halfway point between Las Vegas, Nevada and Marcellus, Michigan is Cornell, Nebraska.
A flight from Las Vegas, Nevada to Seattle, Washington would about an hour, there is approximately 871 miles between the two locations.
Sterling, CO
Groom, Texas is the halfway point between Northport, Alabama and Las Vegas, Nevada. Please see the related link for Meetways, a site providing halfway point information.
1,260 miles
1500 feet
Roughly halfway between Flagstaff and Las Vegas
Las Vegas