Driving Distance: Tempe, AZ to St. Louis, MO

The fastest route (I-40 E → I-44 E) spans ~1,740 miles (2,800 km) and takes 25–27 hours of pure driving.

Real-world: 2–3 days with rest, fuel, meals. Key waypoints: Flagstaff, Albuquerque, Amarillo, Oklahoma City, Tulsa, Springfield.

Alternate southern route (I-10 E → I-20 E → I-49 N → I-44 E) adds ~100 miles but avoids high elevations in winter.