How many miles from Vernal Utah to Casper Wyoming?

The driving distance from Vernal, UT 84078, USA to Casper, WY, USA is 334.9mi / 538.98km

1. Take U.S. 191 NORTH, from Vernal, to I-80 EAST to ROCK SPRINGS, in Wyoming.
2. Take I-80 EAST to U.S. 287 NORTH at EXIT 211 in Rawlins.
3. Take U.S. 287 NORTH to WYO-220 EAST to CASPER.
4. Take WYO-220 EAST to Casper.