www.mapquest.com
366 miles
The shortest driving distance is 2,357 miles.
The driving distance from Saint Louis, MO, USA to Las Vegas, NV, USA is 1,597.18mi / 2570.41km
Phoenix to Las Vegas is about 290 miles (465 km).
It is 324 miles according to Google Maps.
It is 1,500 miles according to Google Maps.
The driving distance from Phoenix, Arizona to Las Vegas, Nevada is 284.9 miles when you take US-93 N. The drive takes around 4 hours 50 minutes.
There are a lot of towns named Monroe in the US. The one in Louisiana is about 1500 miles from Vegas.
The driving distance between Las Vegas, NV and Phoenix, AZ is 286 miles. The driving time would be approximately 7 hours if you were to drive non-stop in good driving conditions. (The driving time does not take into consideration conditions such as weather, road work and rush hour traffic in urban areas.)
Google Maps estimates the driving time as 5.5 hours.
Phoenix is closer to Las Vegas by 53 miles according to Google Maps.