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Find cheap United Airlines flights to San Antonio

RDU — SAT
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
1 adult, Economy
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Find United Airlines flight deals to San Antonio

Cheapest United Airlines flights from USA to San Antonio
Explore the most affordable United Airlines flight options available from USA to San Antonio. Find the lowest fares with prices last updated on July 27, 2026.

This United Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:45 am
ORD
-
SAT
Nonstop3h 07m
United Airlines
Thu 8/2012:55 pm
SAT
-
ORD
Nonstop3h 00m
United Airlines
Deal found 7/26$297
This United Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/174:23 pm
SFO
-
SAT
Nonstop3h 36m
United Airlines
Mon 8/247:35 am
SAT
-
SFO
1 stop6h 39m
United Airlines
Deal found 7/22$304
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/221:30 pm
ORD
-
SAT
Nonstop3h 01m
United Airlines
Sat 8/297:35 am
SAT
-
ORD
1 stop5h 13m
United Airlines
Deal found 7/25$307

Flights to San Antonio with United Airlines at a glance

Find detailed information about United Airlines flights from USA to San Antonio. Explore the options provided by United Airlines to plan your journey from USA to San Antonio. Data last updated July 27, 2026.

Popular in

June

Cheapest in

September

Average price

$406

Round-trip from

$257

One-way from

$129

Good round-trip deal

$429 or less

Good one-way deal

$188 or less
Highest demand for flights to San Antonio with United Airlines; 9% potential price increase.
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Best time to find cheap flights to San Antonio with United Airlines; 1% potential price drop.
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Average price for flights to San Antonio with United Airlines (round-trip).
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United Airlines
  • United Airlines
  • 9/5-9/15
  • Nonstop
  • 4h 38m total
  • USA to San Antonio
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United Airlines
  • United Airlines
  • 8/19
  • Nonstop
  • 2h 12m total
  • USA to San Antonio
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Price to beat on a round-trip flight from the United States to San Antonio with United Airlines.
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Price to beat on a one-way flight from the United States to San Antonio with United Airlines.
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Cheapflights Insights

Find cheap United Airlines flights to San Antonio

How long is the flight to San Antonio with United Airlines?

On average, United Airlines flights from the United States to San Antonio take 3 hours 11 minutes. Flights to San Antonio from other popular cities in the United States will vary in length. Below are a few examples of popular routes and their flight times.

United Airlines weekly flight availability to San Antonio

The most flights to San Antonio operated by United Airlines are scheduled on a Monday (23 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (19 on average).

When is the best time to book a flight to San Antonio with United Airlines?

The best time to book a flight to San Antonio with United Airlines is 61 days before departure. On average, fares are higher if you book on the same day as departure.

When is the cheapest time to fly to San Antonio with United Airlines?

Users looking for the cheapest United Airlines fares to San Antonio should consider flying on Wednesday afternoons, when prices are typically cheapest. Budget-minded travellers will want to avoid Monday evenings, when prices are usually at their highest.

FAQs about flights to San Antonio with United Airlines

  • Which airport do United Airlines flights arrive at when travelling to San Antonio?

    United Airlines flights on this route tend to land at San Antonio Airport.

  • Is United Airlines the cheapest airline for a flight to San Antonio?

    Flight prices will depend on many factors like date, time and cabin class so it is worth comparing flights before booking. Based on Cheapflights data the cheapest average return price for flights to San Antonio tends to be with Breeze Airways.

  • Are there alternative airlines other than United Airlines that fly to San Antonio?

    American Airlines, Delta and Southwest all fly to San Antonio and offer an alternative to United Airlines.

  • How much is a flight to San Antonio with United Airlines?

    The average price for a return flight with United Airlines is $414; with a one-way flight around $281.

See more FAQs

Reviews of United Airlines

See what Cheapflights users have to say about their United Airlines experience.
United Airlines
7.4
Good
10,000 reviews
Overview

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Entertainment

7.1

Popular United Airlines flights

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