Direct (nonstop) flights from Houston to San Diego
1 airline flys nonstop from George Bush Intcntl Houston (IAH) to San Diego International Airport (SAN). It's 1,304 miles (2,098 km), about 3h 34m in the air. Operated by United Airlines.
United Airlines
Route data last updated: May 25, 2026
Airlines with non-stop flights
UA
United Airlines
Alternative Routes
Other ways to fly from Houston to San Diego with one stop · direct emits 220 kg CO₂ per passenger
Looking for the return flight?
SAN → IAH: Flights from San Diego to HoustonOther direct flights from Houston
Direct flights from San Diego (SAN)
Frequently Asked Questions
How long is the direct flight from Houston to San Diego?
A nonstop flight from Houston (IAH) to San Diego (SAN) takes approximately 3 hours and 34 minutes. The distance is 1,304 miles (2,098 km).
Which airlines fly nonstop from Houston to San Diego?
Just United Airlines.
Is there a nonstop flight from Houston to San Diego?
Yes. 1 airline: United Airlines.
How far is Houston from San Diego?
The flight distance from Houston to San Diego is 1,304 miles (2,098 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as New York to Miami.
What type of aircraft flies from Houston to San Diego?
At 3h 34m, this route typically uses narrow-body or mid-range jets — Boeing 737 MAX or Airbus A320neo. Varies by airline.
What is the carbon footprint of a flight from Houston to San Diego?
Roughly 220 kg CO2 per passenger one-way. That's about the same as driving 1,100 km.
Is the return flight from San Diego to Houston also nonstop?
Yes — nonstop flights run both ways. Flight time may differ slightly due to wind patterns.
When is the cheapest time to fly from Houston to San Diego?
Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. 3-6 weeks ahead is a good window for this route. Use "Check Prices" above to compare.
How early should I arrive at George Bush Intcntl Houston for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.