Direct (nonstop) flights from San Francisco to San Diego
4 airlines fly nonstop from San Francisco International (SFO) to San Diego International Airport (SAN). It's 446 miles (718 km), about 1h 44m in the air. Operated by Alaska Airlines, Frontier Airlines, United Airlines and others.
Alaska Airlines
Frontier Airlines
United Airlines
Southwest Airlines
Route data last updated: May 26, 2026
Airlines with non-stop flights
AS
Alaska Airlines
F9
Frontier Airlines
UA
United Airlines
WN
Southwest Airlines
Alternative Routes
Other ways to fly from San Francisco to San Diego with one stop · direct emits 83 kg CO₂ per passenger
Looking for the return flight?
SAN → SFO: Flights from San Diego to San FranciscoOther direct flights from San Francisco
Direct flights from San Diego (SAN)
Frequently Asked Questions
How long is the direct flight from San Francisco to San Diego?
A nonstop flight from San Francisco (SFO) to San Diego (SAN) takes approximately 1 hours and 44 minutes. The distance is 446 miles (718 km).
Which airlines fly nonstop from San Francisco to San Diego?
4 airlines: Alaska Airlines, Frontier Airlines, United Airlines, Southwest Airlines.
Is there a nonstop flight from San Francisco to San Diego?
Yes. 4 airlines: Alaska Airlines, Frontier Airlines, United Airlines, Southwest Airlines.
How far is San Francisco from San Diego?
The flight distance from San Francisco to San Diego is 446 miles (718 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as Mumbai to Goa.
What type of aircraft flies from San Francisco to San Diego?
At 1h 44m, this route typically uses narrow-body aircraft — Boeing 737 or Airbus A320. Varies by airline.
What is the carbon footprint of a flight from San Francisco to San Diego?
Roughly 83 kg CO2 per passenger one-way. That's about the same as driving 415 km.
Is the return flight from San Diego to San Francisco 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 San Francisco 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 San Francisco International for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.