Cheap flights from San Antonio, TX to San Diego, CA

Flights starting at $45. Choose between United Airlines, American Airlines, or Frontier Airlines to find the best price.

Make your travel wishlist, we'll do the rest
Hidden deals
Effortless booking
Travel hacking

Tips to know when travelling to San Diego

Cheapest one-way trip

Cheapest round-trip

Average round-trip

Includes rare itinerary

Travel hack

Most popular airline

One-way trips

Round trips

Travel hack
San Antonio SATLos Angeles LAXLas Vegas LASSan Antonio SAT
$107
Travel hack
San Antonio SATLas Vegas LASSan Antonio SAT
$89
Mailbox
Receive exclusive deals by email
Travelers usually depart from San Antonio International, San Antonio, San Antonio, TX Train Station, San Antonio-Pearl, or San Antonio-Patton Tareyton Tempo when they travel from San Antonio to San Diego. Book your trip to arrive at San Diego International, San Diego, CA - Old Town, San Diego, CA - La Jolla, San Diego, CA - Santa Fe, or San Diego, CA Bus Station. The most popular airlines for this route are United Airlines, American Airlines, Frontier Airlines, Spirit Airlines, and Alaska Airlines. San Antonio and San Diego have 319 direct flights per week.

Check-in for a flight from San Antonio to San Diego

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
United AirlinesUALUAYesNo
American AirlinesAALAANoNo
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
Alaska AirlinesASAASNoOpens 24 days before flight
Closes 1 hours before flight
Learn more about COVID-19 restrictions in United States in our dedicated Stories article.

Frequently asked questions

What are the most popular routes to and from San Antonio?
What are the most popular routes to and from San Diego?
What airports are near San Antonio?
What airports are near San Diego?
What buses and trains depart from San Antonio?
Is it possible to combine flights, buses, and trains in one itinerary when traveling between San Antonio and San Diego?
What is Virtual Interlining and how do I use it?
Which airlines fly between San Antonio and San Diego?
When's the best time to travel between San Antonio and San Diego?
What flights operate between San Antonio and San Diego?
How many airports are there near San Antonio?
How many airports are there near San Diego?
Is it possible to reach San Antonio by bus or train?
What time do nonstop (direct) flights between San Antonio and San Diego depart?
What time do nonstop (direct) flights between San Antonio and San Diego arrive?
What time do flights between San Antonio and San Diego depart?
What time do flights between San Antonio and San Diego arrive?

Explore alternative trips

Flights from San Antonio

Flights to San Diego

Popular routes

Find the best connection from San Antonio to San Diego
Search flights, trains & buses

We hack the system,
you fly for less