How popular is this Denver to San Antonio flight route?

This flight path from Denver Intl to San Antonio was viewed by 21 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

Currently priced at $138, 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 $197 and $227, respectively. Users have found that Frontier is 32% 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 Frontier, which is currently one of the cheapest options available, starting at $67. Southwest flights start at $99 while deals on United Airlines start at $108 one-way.

What are the cheapest flights from Denver to San Antonio?

Looking at all options, your cheapest flight can be booked for $78. While the most popular route (Denver Intl - San Antonio) can be booked for $176 on average our data indicates $183 when flying from Denver to San Antonio.

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 (85%), Air Canada (83%), Southwest (82%).

What are the most popular airlines that fly from Denver to San Antonio?

American Airlines, Frontier and United Airlines are the most popular airlines when flying from Denver to San Antonio.

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

It’s generally more expensive to depart on a Tuesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

Find a great deal and save up to 67% by booking at least 23 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Denver to San Antonio within the next two weeks, with the cheapest ticket starting at $133.

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

August can be a great time to fly to San Antonio from Denver with a flight ticket averaging about $206. Cheapflights users have found deals in the month of August for as cheap as $36. The most expensive prices can be found in the month of December.

Most accurate provider : When it comes to deals on Denver-San Antonio flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-San Antonio flight deals on Cheapflights vs. FlightHub >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.

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 5 daily flights to San Antonio from 4 different airlines. 2h 10m is how long a flight from Denver to San Antonio will take if you book a nonstop flight.

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.

$67+ Flights from Denver to San Antonio - Compare & Save Big

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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

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Denver Intl to San Antonio are usually found in August or June, booked 70 days in advance, depart on a Wednesday or Saturday and return on a Saturday

Cheap flight deals from Denver to San Antonio

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$138 (Frontier)
One-way from	$67 (Cheapflightsfares)
Popular in	December
Cheapest in	August
Average price	$186
Good round-trip deal	$178 or less
Good one-way deal	$109 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

Search Deals

One-way flight from Denver Intl to San Antonio

Search Deals

Highest demand for flights based on searches. 24% potential increase in price ($65 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($11 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in May 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 May 1, 2025.

Thu 7/243:55 pmDEN - SAT

Nonstop2h 18mFrontier

Sun 7/278:14 pmSAT - DEN

Nonstop2h 31mFrontier

Deal found 4/29

$138

Sat 5/319:54 amDEN - SAT

Nonstop2h 10mUnited Airlines

Wed 6/49:10 amSAT - DEN

Nonstop2h 17mUnited Airlines

Deal found 4/30

$197

Tue 6/38:50 pmDEN - SAT

Nonstop2h 15mSouthwest

Sat 6/77:20 pmSAT - DEN

1 stop4h 45mSouthwest

Deal found 4/29

$207

Tue 6/34:39 pmDEN - SAT

1 stop6h 42mDelta

Sat 6/77:45 amSAT - DEN

1 stop8h 00mDelta

Deal found 4/29

$217

Thu 5/226:33 pmDEN - SAT

1 stop4h 25mAmerican Airlines

Sun 5/255:00 amSAT - DEN

1 stop6h 03mAmerican Airlines

Deal found 4/29

$243

Mon 5/268:03 amDEN - SAT

2 stops37h 48mMultiple Airlines

Wed 5/282:37 pmSAT - DEN

2 stops28h 43mMultiple Airlines

Deal found 4/29

$384

Best flights from Denver to San Antonio
Discover carefully curated flight deals from Denver to San Antonio that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 1, 2025.

Thu 6/53:31 pmDEN - SAT

Nonstop2h 19mFrontier

Thu 6/128:12 pmSAT - DEN

Nonstop2h 33mFrontier

Deal found 4/29

$138

Sat 5/319:54 amDEN - SAT

Nonstop2h 10mUnited Airlines

Wed 6/49:10 amSAT - DEN

Nonstop2h 17mUnited Airlines

Deal found 4/30

$197

Sat 5/316:10 amDEN - SAT

1 stop4h 35mSouthwest

Wed 6/48:30 amSAT - DEN

Nonstop2h 15mSouthwest

Deal found 4/30

$227

Sat 5/314:06 pmDEN - SAT

1 stop6h 01mDelta

Sun 6/17:45 amSAT - DEN

1 stop5h 19mDelta

Deal found 4/29

$237

Sun 6/15:00 amDEN - SAT

1 stop4h 01mAmerican Airlines

Mon 6/26:43 pmSAT - DEN

1 stop6h 16mAmerican Airlines

Deal found 4/29

$300

Fri 5/306:21 pmDEN - SAT

3 stops33h 43mMultiple Airlines

Sun 6/16:45 pmSAT - DEN

1 stop23h 42mMultiple Airlines

Deal found 4/30

$334

Tue 6/1011:40 amDEN - SAT

2 stops16h 30mAlaska Airlines

Fri 6/137:37 pmSAT - DEN

1 stop29h 22mAlaska Airlines

Deal found 4/30

$478

Last-minute flights from Denver to San Antonio
Discover last-minute flight deals from Denver to San Antonio. Data last updated May 1, 2025 and is based on user searches.

Tue 5/62:39 pmDEN - SAT

1 stop8h 20mAlaska Airlines

Tue 5/136:35 amSAT - DEN

2 stops15h 40mAlaska Airlines

Deal found 4/28

$758

Fri 5/912:59 amDEN - SAT

1 stop7h 38mDelta

Tue 5/135:20 amSAT - DEN

1 stop8h 22mDelta

Deal found 4/28

$327

Fri 5/96:35 amDEN - SAT

1 stop5h 30mSouthwest

Mon 5/1212:15 pmSAT - DEN

2 stops5h 20mSouthwest

Deal found 4/30

$478

Fri 5/96:30 pmDEN - SAT

3 stops33h 34mMultiple Airlines

Mon 5/126:45 amSAT - DEN

2 stops29h 45mMultiple Airlines

Deal found 4/30

$546

Sat 5/1012:30 amDEN - SAT

1 stop8h 22mFrontier

Thu 5/156:25 pmSAT - DEN

Nonstop2h 27mFrontier

Deal found 4/29

$175

Sat 5/108:23 pmDEN - SAT

Nonstop2h 23mUnited Airlines

Tue 5/135:30 amSAT - DEN

Nonstop2h 34mUnited Airlines

Deal found 4/28

$389

Mon 5/196:31 pmDEN - SAT

2 stops27h 20mMultiple Airlines

Fri 5/3010:01 amSAT - DEN

2 stops32h 25mMultiple Airlines

Deal found 4/29

$377

Tue 5/208:50 pmDEN - SAT

Nonstop2h 15mSouthwest

Wed 5/217:20 pmSAT - DEN

Nonstop2h 25mSouthwest

Deal found 4/28

$259

Thu 5/226:33 pmDEN - SAT

1 stop4h 25mAmerican Airlines

Sun 5/255:00 amSAT - DEN

1 stop6h 03mAmerican Airlines

Deal found 4/29

$243

Sat 5/243:20 pmDEN - SAT

Nonstop2h 16mFrontier

Sat 5/317:36 pmSAT - DEN

Nonstop2h 28mFrontier

Deal found 4/28

$138

Thu 5/293:35 pmDEN - SAT

1 stop8h 04mDelta

Tue 6/36:10 pmSAT - DEN

1 stop5h 20mDelta

Deal found 4/29

$237

Thu 5/296:00 amDEN - SAT

1 stop22h 10mAlaska Airlines

Tue 6/37:28 pmSAT - DEN

2 stops23h 41mAlaska Airlines

Deal found 4/30

$538

One-way flights from Denver to San Antonio
Search for one-way flight options from Denver to San Antonio. Find affordable one-way fares based on user searches. Data last updated May 1, 2025.

Sat 5/313:35 pmDEN - SAT

Nonstop2h 16mFrontier

Deal found 4/30

$67

Wed 7/307:45 amDEN - SAT

Nonstop2h 05mSouthwest

Deal found 4/30

$99

Fri 7/49:40 amDEN - SAT

Nonstop2h 07mUnited Airlines

Deal found 4/30

$108

Sat 5/312:35 pmDEN - SAT

1 stop7h 32mDelta

Deal found 4/30

$109

Mon 6/26:21 pmDEN - SAT

2 stops27h 30mMultiple Airlines

Deal found 4/30

$163

Sat 5/3111:40 amDEN - SAT

2 stops16h 30mAlaska Airlines

Deal found 4/30

$222

Thu 7/35:30 pmDEN - SAT

2 stops14h 42mAmerican Airlines

Deal found 4/29

$278

Cheapflights Fare Finder

Use the filters below to find and compare flights from Denver to San Antonio that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Thu 7/24

3:55 pm-7:13 pm

Nonstop2h 18m

San Antonio

Sun 7/27

8:14 pm-9:45 pm

Nonstop2h 31m

$138

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Sat 5/31

9:54 am-1:04 pm

Nonstop2h 10m

San Antonio

Wed 6/4

9:10 am-10:27 am

Nonstop2h 17m

$197

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Tue 6/3

8:50 pm-12:05 am

Nonstop2h 15m

San Antonio

Sat 6/7

7:20 pm-11:05 pm

1 stop4h 45m

$207

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Tue 6/3

4:39 pm-12:21 am

1 stop6h 42m

San Antonio

Sat 6/7

7:45 am-2:45 pm

1 stop8h 00m

$217

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Thu 5/22

6:33 pm-11:58 pm

1 stop4h 25m

San Antonio

Sun 5/25

5:00 am-10:03 am

1 stop6h 03m

$243

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Mon 5/26

8:03 am-10:51 pm

2 stops37h 48m

San Antonio

Wed 5/28

2:37 pm-6:20 pm

2 stops28h 43m

$384

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Sat 5/31

3:35 pm-6:51 pm

Nonstop2h 16m

$67

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Wed 6/18

8:40 pm-11:50 pm

Nonstop2h 10m

$99

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Fri 7/4

5:45 pm-8:57 pm

Nonstop2h 12m

$108

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Sat 5/31

2:35 pm-11:07 pm

1 stop7h 32m

$109

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 13 results

Compare providers for flights from Denver to San Antonio

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 May.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Cheapfaremart	Price Accuracy-	Trust Score*1 star
CheapTicketsDeal	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars

*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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-San Antonio flight deals on Cheapflights vs. FlightHub >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.

The best insider tips for Denver to San Antonio flights

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

To save time at Denver Airport, use the DEN Reserve to book a security screening slot online.

SAT

For a quick ride to downtown San Antonio, rideshare services are available on Terminal A's lower level.

Our travel experts

Marisa Garcia

Expert on Frontier

Harriet Baskas

Expert on United Airlines

Ramsey Qubein

Expert on SAT

Emily Zemler

Expert on DEN

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?

To ensure you get the cheapest price possible for a flight from Denver to San Antonio, you should look to book at least 70 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?

It’s optimal to fly from Denver to San Antonio in the afternoon. By choosing this option you can save up to 44% on the cost of your flight, compared to a flight at noon.

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

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

Rainfall in San Antonio by month

In terms of precipitation, rainfall in San Antonio ranges from 1.6 - 3.7 inches per month. May is typically the wettest month, when rainfall can reach 3.7 in. December is typically the driest time to visit San Antonio when rainfall is around 1.6 in.

Temperature in San Antonio by month

If weather is an important factor for your trip to San Antonio, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing San Antonio

Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Denver to San Antonio. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Alaska Airlines

8.0

Very good

9,968 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Southwest

8.0

Very good

4,294 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Delta

8.0

Very good

7,934 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

United Airlines

7.4

Good

8,696 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

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 5 daily flights to San Antonio from 4 different airlines. 2h 10m 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 21 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
What are the cheapest airlines flying from Denver to San Antonio round-trip?
Currently priced at $138, 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 $197 and $227, respectively. Users have found that Frontier is 32% 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 Frontier, which is currently one of the cheapest options available, starting at $67. Southwest flights start at $99 while deals on United Airlines start at $108 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: United Airlines (85%), Air Canada (83%), Southwest (82%).
What are the cheapest flights from Denver to San Antonio?
Looking at all options, your cheapest flight can be booked for $78. While the most popular route (Denver Intl - San Antonio) can be booked for $176 on average our data indicates $183 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

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Other flights to San Antonio

Top 4 airlines flying from Denver to San Antonio

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$46	Average$148	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$143	Average$305	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$158	Average$356	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$207	Average$320	FlexibilityNo cancel fee	On-time63%

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$67+ 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 5/31. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Denver to San Antonio with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Denver Intl to San Antonio are usually found in August or June, booked 70 days in advance, depart on a Wednesday or Saturday and return on a Saturday

Cheap flight deals from Denver to San Antonio

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Denver to San Antonio

Cheapest flights from Denver to San AntonioExplore 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 May 1, 2025.

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 May 1, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Denver to San Antonio that are best for you.

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 May.

The best insider tips for Denver to San Antonio flights

Cheapflights partnered with top experts to bring you the best recommendations for your Denver to San Antonio trip

Airlines

Frontier

United Airlines

Airports

DEN

SAT

Our travel experts

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.

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 April 25, 2025.

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

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 May 1, 2025.

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 March 30, 2025.

Rainfall in San Antonio by month

Plan your trip to San Antonio by taking into account the average rainfall totals by month.

Temperature in San Antonio by month

Plan your trip to San Antonio by taking into account the average temperature totals by month.

Reviews of airlines servicing San Antonio

Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Denver to San Antonio. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

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.

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

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Alternative routes for Denver to San Antonio

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Top 4 airlines flying from Denver to San Antonio

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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 May 1, 2025.