Road trip cost
The drive from Phoenix, AZ to St. George, UT covers about 314 miles and takes around 5 hr 6 min — a comfortable day trip. Plan one fuel stop and a meal break and you'll arrive without overspending on gas.
314 mi
5 hr 6 min
0
1
Key takeaway
Drive intensity
Doable in a single day.
Pre-filled with the Phoenix → St. George distance.
Estimated Trip Cost
$0.00
Per Person
$0.00
Gallons
0.00gal
Total miles: 314 (one way).
We summarize publicly available data — no scraping, no external API calls. Figures are calibrated periodically; use the calculators above for your exact inputs.
Estimated one-way fuel cost at $3.45/gal (US average). Adjust for your local price.
Assuming a 28 MPG sedan over the 314-mile route.
$35.32
one way · ~11.2 gal
$38.69
one way · ~11.2 gal
$43.17
one way · ~11.2 gal
At ~314 miles, a full tank in a typical sedan (~350-mile range) covers this drive end-to-end. Top up before you leave and you're set.
Assuming a realistic 230-mile highway range, plan 1 DC fast-charging stop. Tesla Superchargers and Electrify America have strong coverage on most US corridors.
Midpoint
Flagstaff, AZ
Roughly halfway between Phoenix and St. George. A natural place to fuel up, grab a meal, swap drivers, or stop overnight on longer drives.
Route personality
Standard interstate drivePhoenix, AZ
St. George, UT
Winter
Snow, ice and chain-control zones from late November through March — carry an emergency kit.
Summer
Desert highs over 110°F stress engines, tires and EV batteries — drive early or late, never midday.
Driving is almost always cheaper here — short flights cost more than fuel once you factor in airport parking, bags and a rental car.
A one-way drive uses about $39 in gas (28 MPG, $3.45/gal). A typical short domestic flight costs $80–$220 per person plus $30–$60/day for airport parking and any baggage fees.
October through April is most comfortable. Summer driving means extreme heat and higher AC fuel use.
Mostly toll-free — you can drive this without a transponder.
A mid-size sedan or hybrid is the sweet spot — comfortable for the distance with strong MPG.
Moderate — plan at least two 15-minute breaks and swap drivers if possible.
Most drivers complete this route in a single day. Leave early to avoid arriving tired in evening traffic.
This 314-mile route between Phoenix, AZ and St. George, UT is a popular drive in the region. Expect roughly 5 hr 6 min behind the wheel under normal traffic conditions.
The drive is about 314 miles and takes roughly 5 hr 6 min under normal traffic. Add buffer for stops, construction, and rush hour around either city.
In a 28 MPG sedan, expect about 11.2 gallons one way. A 22 MPG SUV would use roughly 14.3 gallons.
At the US average of $3.45/gal, a 28 MPG vehicle costs about $38.69 one way. Round trip roughly doubles that. Use the calculator above for your exact MPG and local gas price.
A typical gas sedan needs about 0 fuel stops one way. A modern EV with ~230 miles of highway range needs about 1 DC fast-charge.
Driving is almost always cheaper here — short flights cost more than fuel once you factor in airport parking, bags and a rental car.
October through April is most comfortable. Summer driving means extreme heat and higher AC fuel use.
Flagstaff, AZ is roughly halfway and makes a natural fuel, food, or overnight break.
Estimated 314-mile fuel cost for each pick at average US prices. Tap any vehicle for a full cost breakdown.
Cheapest to drive
57 MPG · hybrid
~$19
est. one-way fuel cost
See full breakdownBest EV
134 MPGe · ev
~$13
est. one-way charging cost
See full breakdownBest sedan
37 MPG · sedan
~$29
est. one-way fuel cost
See full breakdownBest SUV for comfort
33 MPG · suv
~$33
est. one-way fuel cost
See full breakdownBest truck for cargo
26 MPG · truck
~$42
est. one-way fuel cost
See full breakdownRelated routes
Reverse drives, connecting routes and regional alternatives — each with distance and driving cost at current US gas prices.
Reverse drive
St. George to Phoenix driving cost
314 mi · 5.1 h
Other road trip cost estimates that start in Phoenix, AZ.
Other routes with St. George, UT as the destination.
Same-state and neighboring-state drives with similar driving cost.
Longer connected routes leaving St. George, UT — great for multi-day road trip planning.
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