$142 Cheap United flights San Antonio (SAT) to San Diego (SAN)

View $142 flight on Wed, Nov 5, 2025Opens in a new window

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$142 Cheap United flights San Antonio (SAT) to San Diego (SAN)

Prices were available within the past 7 days and start at $142 for one-way flights and $283 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Sep 12 - Sun, Sep 14
SAT
San Antonio
SAN
San Diego
$283 Roundtrip, found 4 hours ago
$283
Roundtrip
found 4 hours ago
Select United flight, departing Fri, Sep 12 from San Antonio to San Diego, returning Sun, Sep 14, priced at $283 found 4 hours ago
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Flights from San Antonio (SAT) to San Diego (SAN)
Origin airport
San Antonio Intl.
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, Spirit Airlines, United
Popular airline
Alaska Airlines
Distance
1127 mi

Frequently asked questions

How much is a United Airlines flight from San Antonio Intl. Airport (SAT) to San Diego Intl. Airport (SAN)?
You can find affordable return United Airlines flights from $283 from SAT to SAN by organizing your results from "Price (lowest to highest)" on Expedia. Or search for bargains from $142 for a one-way journey.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from SAT to SAN with United Airlines?
January is one of the cheapest months to jet away to San Diego with United Airlines. You could also find great deals on one-way and round-trip tickets in November.
What is the cheapest time to book flights from San Antonio Intl. Airport (SAT) to San Diego Intl. Airport (SAN) with United Airlines?
To find cheap United Airlines fares from San Antonio Intl. Airport (SAT) to San Diego Intl. Airport (SAN), start searching one to three months before your intended departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact the cost. Sunday is typically the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your trip on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from San Antonio Intl. Airport (SAT) to San Diego Intl. Airport (SAN)?
To see if there's a direct route from SAT to SAN with United Airlines or another carrier, select the "Nonstop" filter when looking for tickets.
What is the earliest United Airlines flight from SAT to SAN?
To find the earliest departures from SAT to SAN with United Airlines, filter your search by "Early Morning" and "Morning." Booking an early flight generally means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in San Diego?
Catch a United Airlines flight from San Antonio Intl. Airport (SAT) to San Diego, and you'll most likely touch down at San Diego Intl. Airport (SAN). This is the airline's primary hub here.
Why fly with United Airlines from SAT to SAN?
A rewarding loyalty program and the opportunity to collect points through United Mileage Plus are the start of the reasons to fly from SAT to SAN with United Airlines. Plus, when you sign up to our One Key™ program, you can earn OneKeyCash™* on top of United Airlines's loyalty program earnings. It's yours to use wherever your next trip takes you.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my United Airlines flight from San Antonio Intl. Airport (SAT) to San Diego Intl. Airport (SAN)?
Depending on the ticket type you purchased, a fee may apply if you cancel or change your booking more than 24 hours after it has been confirmed. To secure plane tickets with more flexibility, select our "No cancel fee" or "Changes included" filter while looking for flights. For more information on modifying or canceling your reservation, head to "Trips," select your flight and tick "Manage Booking."

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*Available to One Key members.