Find United Airlines(UA) flights from San Francisco to San Antonio

At the moment, you can catch a nonstop flight from San Francisco to San Antonio with the following airlines, including: Frontier Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

It takes about 3 hours 52 minutes to fly from San Francisco 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 Francisco 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.

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

After crunching the numbers on our July flight calendar, it's currently cheapest to fly from San Francisco to San Antonio on July 31, 2026 with Frontier Airlines, with prices starting at US$250.

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

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

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.