There are 1,269.93 miles from Saint Louis to Phoenix in southwest direction and 1,504 miles (2,420.45 kilometers) by car, following the I-40 and US-84 W route.
Saint Louis and Phoenix are 21 hours 26 mins far apart, if you drive non-stop .
This is the fastest route from Saint Louis, MO to Phoenix, AZ. The halfway point is Amarillo, TX.
Please note the time difference between Saint Louis, MO and Phoenix, AZ is 2 hours. The current time in Saint Louis is 8:35 pm and the current time in Phoenix is 6:35 pm.
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