via I-5
The drive from San Diego to Phoenix takes approximately 5h 15min, covering 355 miles via I-5. Under normal conditions, expect to spend around $41 on gas.
Travel time can vary — during peak hours, weekends, or holidays, the journey may take 7–8+ hours. For the fastest trip, leave early morning (before 7 AM) or travel on weekday evenings.
Traffic is usually worst during weekday rush hours (7–9 AM, 4–7 PM) and holiday weekends.
The main West Coast highway. Heavy traffic near LA, San Francisco, and Seattle. Scenic stretches through Oregon and Northern California.
This trip can typically be done on a single tank of gas.
The best time to drive from San Diego to Phoenix is late evening (8-10 pm). Weekday mornings before 7 AM or evenings after 7 PM typically have the lightest traffic. Avoid Friday afternoons and Sunday evenings when possible.
✈️ Flying is faster when you factor in airport time. Flight time is ~43 min but add ~2.5 hours for check-in, security, and boarding.
Estimated times and prices. Bus/train availability varies by route. Driving gives the most flexibility for stops and schedules.
Popular cities along the route for rest, food, or fuel:
Planning a trip from San Diego to Phoenix? The most common route runs along I-5, covering 355 miles in about 5h 15min. Gas will set you back roughly $41 for the one-way trip. For the best experience, hit the road during late evening (8-10 pm) when traffic is lightest.
This 355-mile route is long enough to merit some planning. Bring water and snacks, check your tire pressure before departure, and consider splitting the drive with a co-driver if you prefer company. Popular stopping points include Joshua Tree, Kingman — great options for grabbing a meal, fueling up, or stretching your legs.