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$62+ 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 12/19. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SAT
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find cheap flights from Denver to San Antonio with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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Cheapflights Tip: The best prices from Denver Intl to San Antonio are usually found in September or July, booked 65 days in advance, depart on a Saturday or Thursday 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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$110
(CheapOair)

One-way from

$62
(Priceline)

Popular in

December

Cheapest in

September

Average price

$219

Good round-trip deal

$189 or less

Good one-way deal

$100 or less
Provider with most accurate pricing for Denver Intl-San Antonio flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-San Antonio flights.
Search Deals
From Denver Intl to San Antonio
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One-way flight from Denver Intl to San Antonio
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($35 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Denver Intl to San Antonio.
Search Deals
Price to beat on a one-way flight from Denver Intl to San Antonio.
Search Deals

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 October 30, 2025.

This Priceline deal was found by Cheapflights users on 10/30. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/73:56 pmDEN - SAT
Nonstop2h 15mFrontier
Thu 12/111:51 pmSAT - DEN
1 stop7h 21mFrontier
Deal found 10/30$114
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/122:15 pmDEN - SAT
1 stop22h 04mFrontier
Sat 11/153:12 pmSAT - DEN
Nonstop2h 26mFrontier
Deal found 10/29$115
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Wed 12/2410:29 pmDEN - SAT
1 stop9h 54mFrontier
Thu 1/110:18 amSAT - DEN
1 stop15h 07mFrontier
Deal found 10/29$122
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 12/410:57 amDEN - SAT
Nonstop2h 14mFrontier
Sun 12/75:46 pmSAT - DEN
1 stop16h 16mFrontier
Deal found 10/29$124
This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/199:00 pmDEN - SAT
Nonstop2h 17mFrontier
Sat 1/31:33 pmSAT - DEN
Nonstop2h 24mFrontier
Deal found 10/28$129
This CheapOair deal was found by Cheapflights users on 10/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/59:00 amDEN - SAT
1 stop10h 30mFrontier
Sun 12/77:56 pmSAT - DEN
Nonstop2h 24mFrontier
Deal found 10/29$130
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 12/2210:29 pmDEN - SAT
1 stop9h 54mFrontier
Wed 12/312:09 pmSAT - DEN
Nonstop2h 24mFrontier
Deal found 10/28$134
This Frontier deal was found by Cheapflights users on 10/30. 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.
Fri 11/144:16 pmDEN - SAT
Nonstop2h 14mFrontier
Sat 11/154:20 pmSAT - DEN
1 stop12h 39mFrontier
Deal found 10/30$135
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Fri 11/289:00 pmDEN - SAT
Nonstop2h 20mFrontier
Fri 12/57:55 pmSAT - DEN
Nonstop2h 24mFrontier
Deal found 10/29$140
This Priceline deal was found by Cheapflights users on 10/29. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/134:29 pmDEN - SAT
Nonstop2h 14mFrontier
Sat 11/153:12 pmSAT - DEN
Nonstop2h 26mFrontier
Deal found 10/29$141
This CheapOair deal was found by Cheapflights users on 10/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/510:29 pmDEN - SAT
1 stop13h 50mFrontier
Thu 11/1310:46 pmSAT - DEN
1 stop6h 13mFrontier
Deal found 10/29$143

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 October 30, 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 1/9

6:45 pm-9:55 pm

Nonstop2h 10m

San Antonio

Mon 1/12

6:15 pm-7:35 pm

Nonstop2h 20m

$117

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Sat 11/8

11:00 am-2:17 pm

Nonstop2h 17m

San Antonio

Mon 11/10

2:04 pm-11:53 pm

1 stop10h 49m

$180

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Wed 1/7

1:55 pm-9:35 pm

2 stops6h 40m

San Antonio

Sun 1/11

5:50 am-10:05 am

1 stop5h 15m

$182

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Fri 1/9

1:41 pm-4:53 pm

Nonstop2h 12m

San Antonio

Mon 1/12

8:30 am-9:59 am

Nonstop2h 29m

$207

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Thu 12/4

12:50 am-10:31 am

1 stop8h 41m

San Antonio

Sun 12/7

6:22 pm-12:07 am

1 stop6h 45m

$217

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Sat 12/6

7:50 am-11:05 am

Nonstop2h 15m

San Antonio

Sun 12/7

5:45 am-9:00 am

1 stop4h 15m

$237

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Fri 12/5

12:50 am-10:36 am

1 stop8h 46m

San Antonio

Mon 12/15

6:22 pm-12:07 am

1 stop6h 45m

$247

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Fri 11/7

4:16 pm-7:30 pm

Nonstop2h 14m

San Antonio

Sun 11/16

9:59 am-12:47 am

1 stop15h 48m

$251

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Thu 12/4

3:05 pm-9:40 pm

2 stops5h 35m

San Antonio

Sun 12/7

5:45 am-9:00 am

1 stop4h 15m

$262

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Sun 1/25

9:53 am-1:09 pm

Nonstop2h 16m

$79

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 18 results
1
2

Compare providers for flights from Denver to San Antonio

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to San Antonio in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
JustAirTicketPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Denver-San Antonio flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Denver-San Antonio flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Denver-San Antonio flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-San Antonio flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Denver-San Antonio flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 October 24, 2025.

To ensure you get the cheapest price possible for a flight from Denver to San Antonio, you should look to book at least 65 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, February is the cheapest month in which you can book a flight from Denver to San Antonio (average of $48). Flying from Denver to San Antonio in July is currently the most expensive (average of $90). 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 October 30, 2025.

It’s optimal to fly from Denver to San Antonio in the afternoon. By choosing this option you can save up to 27% 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 October 26, 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. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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

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 October 30, 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

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

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

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

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
8,998 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

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
11,030 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

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
3,123 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

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 4 daily flights to San Antonio from 4 different airlines. 2h 05m 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 16 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?

    Southwest, Frontier, and United Airlines 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 $71, 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 Southwest - these airlines can fly you to your destination from $156 and $197, respectively. Users have found that Frontier is 68% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Denver to San Antonio one-way?

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $79. Frontier flights start at $84 while deals on Southwest start at $89 one-way.

  • 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: Air Canada (89%), United Airlines (86%), Frontier (84%).

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

    Looking at all options, your cheapest flight can be booked for $55. While the most popular route (Denver Intl - San Antonio) can be booked for $117 on average, our data indicates $192 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, February is the cheapest month in which you can book a flight from Denver to San Antonio (average of $48). Flying from Denver to San Antonio in July is currently the most expensive (average of $90). 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$71Average$191FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$156Average$336FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$197Average$303FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$198Average$326FlexibilityNo cancel feeOn-time71%

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