Phoenix to Cedar City Road Trip: Complete Guide

Did you know that the route from Phoenix to Cedar City crosses three distinct geological provinces—Basin and Range, Colorado Plateau, and the transition zone? This drive of roughly 450 miles along I-17 and I-15 reveals a dramatic shift from Sonoran Desert to high-altitude red rock country.

How long to drive Phoenix, AZ to Cedar City, UT? Expect 6.5 to 7.5 hours of driving time without stops, but most travelers stretch it to a full day. Is it worth driving Phoenix, AZ to Cedar City, UT? Absolutely—the landscapes are among America’s most varied.

The highway passes through Flagstaff at 7,000 feet, then descends into the Virgin River Gorge. You'll cross the Utah state line near the Beaver Dam Mountains. Learn more about how to find the best stops and hidden gems between cities.

Road quality on I-17 is generally good, but watch for construction near Cordes Junction. Winter weather can make Flagstaff to St. George segment icy—check conditions. Virgin River Gorge has tight curves and steep grades.

For family and child suitability:

• Sunset Point rest area (has playground)
• Bearizona Wildlife Park (Williams, AZ)
• Dinosaur Discovery Site (St. George)

Pet-friendly framework: Many rest stops have designated pet areas. Leashed pets are allowed at National Monuments but not inside buildings. Drink plenty of water; desert heat can affect animals.

Fatigue management: Take breaks every 2 hours. Ideal stops: Flagstaff (coffee shops), St. George (shaded parks), and the Cedar City visitor center. Avoid driving between midnight and 5 AM due to wildlife crossing risk.

The drive transitions through the Sonoran Desert's saguaro forests, then climbs into ponderosa pine near Flagstaff. North of Flagstaff, the San Francisco Peaks dominate the horizon. Approaching the Utah border, the red sandstone cliffs and mesas of the Colorado Plateau appear.

Key natural attractions include:

• Montezuma Castle National Monument (near Camp Verde)
• Red Rock State Park (Sedona detour adds 1 hour)
• Pipe Spring National Monument (near Colorado City)

Local commerce: stop in Flagstaff for Navajo art and craft breweries. In St. George, browse the historic downtown shops. Cedar City's Main Street features galleries and the famous Utah Shakespeare Festival theater.

The route uses Interstate 17 north from Phoenix to Flagstaff, then Interstate 40 west for 20 miles to connect with US-89 north, which merges onto Interstate 15 near St. George. Total distance: 446 miles, mostly four-lane divided highway.

Fuel stops are abundant every 30-40 miles, but prices vary. Fill up in Flagstaff or St. George for lower rates. Gas stations near the Utah state line often charge a premium.

• Phoenix average fuel price: $4.20/gal
• Flagstaff: $4.50/gal
• St. George: $4.10/gal
• Cedar City: $4.15/gal

Rest areas exist at Sunset Point (milepost 252 on I-17), and many exits have chain hotels. Cell service is reliable except through the Virgin River Gorge where it drops for 10 miles.