Is it better to fly or drive?

Flying is significantly faster, while driving offers flexibility for sightseeing.

What is the best highway?

Interstate 10 is the primary and most direct route.

Amtrak exists but requires multiple transfers and takes significantly longer.

Do I need a rental car?

San Diego is best explored with a vehicle due to its sprawling layout.

What is the cheapest month?

January and February typically offer the lowest airfares.

Katy

San Diego

Flight Driving

Katy to San Diego

Updated: 28 May 2026

Traveling from Katy to San Diego covers approximately 2,250 kilometers. The most efficient route is flying from George Bush Intercontinental Airport to San Diego International Airport. Driving requires navigating I-10 West through the desert landscapes of West Texas, New Mexico, and Arizona. Expect a multi-day journey if driving, as the distance spans over 20 hours of pure road time. This route transitions from the humid Gulf Coast to the Mediterranean climate of Southern California.

Total Distance: Driving distance 2,250 km, straight-line air distance 2,010 km.

Fastest Way

Flight from IAH to SAN takes approximately 4 hours total travel time.

Cheapest Way

Driving is generally cheaper for groups of three or more people.

Compare Katy to San Diego Routes

	Flight Direct	Driving Direct
Duration	4 hours	22 hours
Avg Price	$250 - $450	$300 - $500 in fuel
Operator	United Airlines	Personal Vehicle
Route	IAH to SAN	I-10 West through San Antonio, El Paso, and Tucson.
Tip	Book at least three weeks in advance to secure lower fares.	Ensure your vehicle cooling system is serviced before crossing the desert.

Travel Tips

Airport Parking
Use off-site parking lots near IAH to save on daily rates.
Hydration
Carry extra water when driving through the West Texas and Arizona desert stretches.
Time Zones
Remember you will cross two time zone boundaries moving from Central to Pacific time.
Traffic
Avoid I-10 through downtown San Antonio during morning and evening rush hours.
Fuel Stops
Fill up in major cities to avoid higher prices at remote desert gas stations.

Safety Tips

Desert Driving
Check tire pressure before leaving, as heat causes expansion and potential blowouts.
Fatigue
Switch drivers every four hours to maintain alertness on long highway stretches.
Emergency Kit
Keep a roadside emergency kit with jumper cables and a flashlight in your trunk.
Weather
Monitor weather reports for sandstorms in the desert regions during spring.