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$43+ Cheap flights from Denver to San Antonio (DEN - SAT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SAT
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to San Antonio are usually found in September or October, booked 78 days in advance, depart on a Saturday or Tuesday and return on a Thursday

Cheap flight deals from Denver to San Antonio

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to San Antonio (SAT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 16, 2025.

Round-trip from

$102
(Cheapflightsfares)

One-way from

$43
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$177

Good round-trip deal

$134 or less

Good one-way deal

$104 or less
From Denver Intl to San Antonio
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One-way flight from Denver Intl to San Antonio
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Highest demand for flights based on searches. 16% potential increase in price ($44 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Denver Intl to San Antonio.
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Price to beat on a one-way flight from Denver Intl to San Antonio.
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Find flight deals from Denver to San Antonio

Cheapest flights from Denver to San Antonio
Explore the most affordable flight options available from Denver to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2212:00 pmDEN - SAT
Nonstop2h 14mFrontier
Sat 10/255:32 pmSAT - DEN
Nonstop2h 21mFrontier
Deal found 9/15$102
This Frontier deal was found by Cheapflights users on 9/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/164:27 pmDEN - SAT
Nonstop2h 14mFrontier
Sat 10/255:32 pmSAT - DEN
Nonstop2h 21mFrontier
Deal found 9/14$105
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/38:35 amDEN - SAT
Nonstop2h 11mFrontier
Sun 10/59:55 amSAT - DEN
Nonstop2h 27mFrontier
Deal found 9/14$107
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/304:34 pmDEN - SAT
Nonstop2h 14mFrontier
Sun 11/28:25 pmSAT - DEN
Nonstop2h 23mFrontier
Deal found 9/13$108
This Frontier deal was found by Cheapflights users on 9/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/181:22 pmDEN - SAT
Nonstop2h 15mFrontier
Fri 10/247:10 pmSAT - DEN
1 stop14h 50mFrontier
Deal found 9/14$120
This Frontier deal was found by Cheapflights users on 9/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/181:22 pmDEN - SAT
Nonstop2h 15mFrontier
Sun 10/268:26 pmSAT - DEN
Nonstop2h 23mFrontier
Deal found 9/14$121
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/204:21 pmDEN - SAT
Nonstop2h 14mFrontier
Fri 10/248:26 pmSAT - DEN
Nonstop2h 23mFrontier
Deal found 9/15$124
This Frontier deal was found by Cheapflights users on 9/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/164:27 pmDEN - SAT
Nonstop2h 14mFrontier
Thu 10/238:26 pmSAT - DEN
Nonstop2h 23mFrontier
Deal found 9/14$125
This Frontier deal was found by Cheapflights users on 9/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/164:27 pmDEN - SAT
Nonstop2h 14mFrontier
Wed 10/223:59 pmSAT - DEN
Nonstop2h 26mFrontier
Deal found 9/14$126
This Frontier deal was found by Cheapflights users on 9/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/204:21 pmDEN - SAT
Nonstop2h 14mFrontier
Thu 10/238:26 pmSAT - DEN
Nonstop2h 23mFrontier
Deal found 9/14$127
This Gotogate deal was found by Cheapflights users on 9/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/811:00 amDEN - SAT
Nonstop2h 17mFrontier
Mon 11/102:04 pmSAT - DEN
1 stop22h 06mFrontier
Deal found 9/14$128

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver to San Antonio that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Denver to San Antonio that are best for you.

Fly from

Denver

Fly to

San Antonio

Route

Depart

Return

Price

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Fri 12/5

6:00 am-9:18 am

Nonstop2h 18m

San Antonio

Fri 12/12

10:13 am-11:39 am

Nonstop2h 26m

$121

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Thu 12/4

3:04 pm-6:19 pm

Nonstop2h 15m

San Antonio

Mon 12/8

9:54 am-8:55 am

1 stop24h 01m

$162

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Fri 10/24

8:55 pm-12:05 am

Nonstop2h 10m

San Antonio

Sun 10/26

9:00 pm-1:15 am

1 stop5h 15m

$207

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Fri 10/17

5:55 pm-11:40 pm

1 stop4h 45m

San Antonio

Mon 10/20

8:30 pm-11:40 pm

1 stop4h 10m

$212

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Thu 11/13

4:29 pm-7:43 pm

Nonstop2h 14m

San Antonio

Sat 11/29

7:00 am-8:24 am

Nonstop2h 24m

$220

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Fri 12/5

9:50 am-1:06 pm

Nonstop2h 16m

San Antonio

Sat 12/13

1:34 pm-2:54 pm

Nonstop2h 20m

$227

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Wed 9/24

12:59 am-10:48 am

1 stop8h 49m

San Antonio

Sun 9/28

8:20 pm-9:48 pm

Nonstop2h 28m

$233

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Fri 9/19

3:45 pm-7:00 pm

Nonstop2h 15m

San Antonio

Mon 9/22

8:20 pm-9:48 pm

Nonstop2h 28m

$241

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Wed 12/10

3:05 pm-9:40 pm

2 stops5h 35m

San Antonio

Sun 12/14

5:25 am-6:45 am

Nonstop2h 20m

$242

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Thu 12/4

3:05 pm-9:40 pm

2 stops5h 35m

San Antonio

Mon 12/8

6:35 pm-9:35 pm

1 stop4h 00m

$242

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 21 results
1
2
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The best insider tips for Denver to San Antonio flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Denver to San Antonio trip
Airlines
Frontier

Frontier's UpFront Plus seats guarantee an empty middle seat for added comfort.


Frontier charges for carry-on bags; prepay to save on fees.

Read more about Frontierby Marisa Garcia
United Airlines

Basic Economy on United allows a personal item only; no carry-on bags are permitted.


United Economy Plus offers extra legroom seats towards the front of the economy cabin.

Read more about United Airlinesby Harriet Baskas
Airports
DEN

For quick access, use the A Line train from Union Station to DEN, running every 15 minutes and taking 37 minutes.

Read more about DENby Emily Zemler
SAT

From SAT, rideshare services pick up on the lower level of Terminal A, offering convenient access to downtown San Antonio.

Read more about SATby Ramsey Qubein
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on SAT

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more
Emily Zemler

Emily Zemler

Expert on DEN

Emily Zemler

Emily Zemler

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more

Best time to book a flight from Denver to San Antonio

Have a flexible travel schedule? Discover the best time to fly to San Antonio from Denver with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Denver to San Antonio

How far ahead should I book a flight from Denver to San Antonio?

Use this chart to determine the optimal time to book a round-trip flight from Denver to San Antonio. Price data was last updated on September 12, 2025.

To ensure you get the cheapest price possible for a flight from Denver to San Antonio, you should look to book at least 78 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Denver to San Antonio?

Currently, August is the cheapest month in which you can book a flight from Denver to San Antonio (average of $295). Flying from Denver to San Antonio in March is currently the most expensive (average of $376). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from DEN to SAT?

Find hourly flight availability from Denver to San Antonio. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

It’s optimal to fly from Denver to San Antonio in the afternoon. By choosing this option you can save up to 26% on the cost of your flight, compared to a flight in the evening.

What is the cheapest day to fly from Denver to San Antonio?

Use this chart to determine the cheapest time to fly round-trip from Denver to San Antonio. Price data was last updated on September 14, 2025.

Travelers seeking maximum savings on their Denver to San Antonio flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing San Antonio

Get insights into the airlines that provide service to San Antonio. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Antonio. Reviews last updated September 16, 2025.
See what other customers who have flown with Southwest, United Airlines, and American Airlines from Denver to San Antonio have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,929 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,172 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Denver to San Antonio. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Denver to San Antonio?

    San Antonio is the airport most travelers will use when flying to San Antonio from Denver Intl. Booking flights from Denver Intl (DEN) to San Antonio (SAT) should be relatively easy as there are 10 daily flights to San Antonio from 4 different airlines. 2h 07m is how long a flight from Denver to San Antonio will take if you book a nonstop flight.

  • How popular is this Denver to San Antonio flight route?

    This flight path from Denver Intl to San Antonio was viewed by 18 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Denver to San Antonio?

    Frontier and Southwest can get you from Denver to San Antonio in just under 2h 10m. Your travel time will be generally consistent. Denver and San Antonio are separated by a distance of 795 mi. Generally, flights for this route are nonstop.

  • What are the cheapest airlines flying from Denver to San Antonio round-trip?

    Currently priced at $60, Frontier will fly you from Denver to San Antonio and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and American Airlines - these airlines can fly you to your destination from $146 and $158, respectively. Users have found that Frontier is 73% cheaper than the other options available to this destination.

  • What are the most reliable airlines from Denver to San Antonio?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Denver to San Antonio on time: United Airlines (69%), Frontier (66%), Air Canada (65%).

  • What are the cheapest flights from Denver to San Antonio?

    Looking at all options, your cheapest flight can be booked for $61. While the most popular route (Denver Intl - San Antonio) can be booked for $146 on average, our data indicates $167 when flying from Denver to San Antonio.

  • Can I find deals for flights from Denver to San Antonio that include hotel bookings?

    Yes. In addition to deals on Denver to San Antonio flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Denver to San Antonio?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Denver to San Antonio.

  • Can I find deals for business class flights from Denver to San Antonio?

    Yes. Cheapflights offers flight deals from Denver to San Antonio by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Denver to San Antonio?

    Currently, August is the cheapest month in which you can book a flight from Denver to San Antonio (average of $295). Flying from Denver to San Antonio in March is currently the most expensive (average of $376). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
New Braunfels
Kerrville

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Alternative routes for Denver to San Antonio

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Denver to San Antonio

Discover the top 4 airlines that operate flights from Denver to San Antonio. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$60Average$182FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$146Average$324FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$158Average$326FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$197Average$303FlexibilityNo cancel feeOn-time63%

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