Cheap Flights from San Diego to San Antonio from US$108

Frequently Asked Questions

• What are the cheapest flights from San Diego to San Antonio (SAN-SAT)?

  Based on Trip.com data, Frontier Airlines offers one-way fares as low as US$108 on Cheapest nonstop routes (e.g. SAN to SAT on Tue, Aug 4), while Frontier Airlines offers Cheapest nonstop round-trips from US$224 departing on Wed, Aug 5 and returning on Tue, Aug 11.

• Which airlines offer flights from San Diego to San Antonio?

  At the moment, several airlines serve connecting flights from San Diego to San Antonio, including: Delta Air Lines Selected airlines are based on historical data collected from flight bookings made by users on Trip.com within the last 90 days.

• How long is a flight from San Diego to San Antonio?

  It takes about 3 hours 22 minutes to fly from San Diego to San Antonio.

• When is the best time to book flights from San Diego to San Antonio?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from San Diego to San Antonio is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How can I find the best deals on flights from San Diego to San Antonio?

  To find best deals on flights from San Diego to San Antonio, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Aug 4, with one-way flights priced at just US$108.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for San Antonio travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from San Diego (SAN) to San Antonio (SAT) the cheapest?

  The cheapest months to fly from San Diego to San Antonio is September, when demand for travel is lower.

• Which upcoming date is cheapest to fly from San Diego to San Antonio on?

  After crunching the numbers on our July flight calendar, it's currently cheapest to fly from San Diego to San Antonio on July 29, 2026 with Frontier Airlines, with prices starting at US$143.

• Which airports can I fly to for San Antonio from San Diego?

  You can land at any one of the following hubs in San Antonio, with San Diego International Airport to San Antonio International Airport (SAN-SAT) is by far the most common option on this route: San Antonio International Airport (SAT) Kelly Field Annex/Lackland Air Force Base (SKF).

• Is there any time difference between San Diego and San Antonio?

  The time difference between San Antonio and San Diego is 2h.

• How do I change or cancel my ticket from San Diego to San Antonio?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.