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Cheap flights from Denver to San Antonio from $43

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to San Antonio departing on 10/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Denver to San Antonio

Cheap round-trip flights

Frontier Logo
4:27 pm - 7:41 pmDEN-SAT
2h 14mnonstop
Frontier Logo
5:32 pm - 6:53 pmSAT-DEN
2h 21mnonstop
$90Frontier
Find Deal
jue., oct. 16 - sáb., oct. 25
Frontier Logo
8:00 am - 11:14 amDEN-SAT
2h 14mnonstop
Frontier Logo
8:26 pm - 9:49 pmSAT-DEN
2h 23mnonstop
$92Frontier
Find Deal
jue., oct. 16 - jue., oct. 23
Frontier Logo
12:00 pm - 3:14 pmDEN-SAT
2h 14mnonstop
Frontier Logo
5:32 pm - 6:53 pmSAT-DEN
2h 21mnonstop
$102Frontier
Find Deal
mié., oct. 22 - sáb., oct. 25
Frontier Logo
1:22 pm - 4:37 pmDEN-SAT
2h 15mnonstop
Frontier Logo
8:26 pm - 9:49 pmSAT-DEN
2h 23mnonstop
$103Frontier
Find Deal
sáb., oct. 18 - jue., oct. 23
Frontier Logo
12:00 pm - 3:14 pmDEN-SAT
2h 14mnonstop
Frontier Logo
8:26 pm - 9:49 pmSAT-DEN
2h 23mnonstop
$105Frontier
Find Deal
mar., oct. 21 - vie., oct. 24
Frontier Logo
4:27 pm - 7:41 pmDEN-SAT
2h 14mnonstop
Frontier Logo
5:32 pm - 6:53 pmSAT-DEN
2h 21mnonstop
$106Frontier
Find Deal
jue., oct. 16 - sáb., oct. 25
Frontier Logo
12:00 pm - 3:14 pmDEN-SAT
2h 14mnonstop
Frontier Logo
8:26 pm - 9:49 pmSAT-DEN
2h 23mnonstop
$107Frontier
Find Deal
mar., oct. 21 - vie., oct. 24
Frontier Logo
12:00 pm - 3:14 pmDEN-SAT
2h 14mnonstop
Frontier Logo
5:32 pm - 6:53 pmSAT-DEN
2h 21mnonstop
$108Frontier
Find Deal
mar., oct. 7 - sáb., oct. 11
Multiple Airlines Logo
1:22 pm - 4:37 pmDEN-SAT
2h 15mnonstop
Multiple Airlines Logo
7:00 am - 11:10 pmSAT-DEN
17h 10m1 stop
$149Multiple Airlines
Find Deal
sáb., oct. 18 - mié., oct. 22
Multiple Airlines Logo
1:22 pm - 4:37 pmDEN-SAT
2h 15mnonstop
Multiple Airlines Logo
7:00 am - 11:10 pmSAT-DEN
17h 10m1 stop
$151Multiple Airlines
Find Deal
sáb., oct. 18 - mié., oct. 22

Frontier flights from Denver to San Antonio

Our best Frontier deals on Denver to San Antonio flight tickets
Frontier
Oct 16
DEN4:27 pmDenver Intl
2h 14m
SAT7:41 pmSan Antonio
Oct 25
SAT5:32 pmSan Antonio
2h 21m
DEN6:53 pmDenver Intl
$90
Find similar
Frontier
Oct 16
DEN8:00 amDenver Intl
2h 14m
SAT11:14 amSan Antonio
Oct 23
SAT8:26 pmSan Antonio
2h 23m
DEN9:49 pmDenver Intl
$92
Find similar
Frontier
Oct 22
DEN12:00 pmDenver Intl
2h 14m
SAT3:14 pmSan Antonio
Oct 25
SAT5:32 pmSan Antonio
2h 21m
DEN6:53 pmDenver Intl
$102
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated septiembre 17, 2025.
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

jue. 10/16

4:27 pm-7:41 pm

Nonstop2h 14m

San Antonio

sáb. 10/25

5:32 pm-6:53 pm

Nonstop2h 21m

$90

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

jue. 10/16

8:00 am-11:14 am

Nonstop2h 14m

San Antonio

jue. 10/23

8:26 pm-9:49 pm

Nonstop2h 23m

$92

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

mié. 10/22

12:00 pm-3:14 pm

Nonstop2h 14m

San Antonio

sáb. 10/25

5:32 pm-6:53 pm

Nonstop2h 21m

$102

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

sáb. 10/18

1:22 pm-4:37 pm

Nonstop2h 15m

San Antonio

jue. 10/23

8:26 pm-9:49 pm

Nonstop2h 23m

$103

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

mar. 10/21

12:00 pm-3:14 pm

Nonstop2h 14m

San Antonio

vie. 10/24

8:26 pm-9:49 pm

Nonstop2h 23m

$105

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

jue. 10/16

4:27 pm-7:41 pm

Nonstop2h 14m

San Antonio

sáb. 10/25

5:32 pm-6:53 pm

Nonstop2h 21m

$106

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

mar. 10/21

12:00 pm-3:14 pm

Nonstop2h 14m

San Antonio

vie. 10/24

8:26 pm-9:49 pm

Nonstop2h 23m

$107

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

mar. 10/7

12:00 pm-3:14 pm

Nonstop2h 14m

San Antonio

sáb. 10/11

5:32 pm-6:53 pm

Nonstop2h 21m

$108

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

sáb. 10/18

1:22 pm-4:37 pm

Nonstop2h 15m

San Antonio

mié. 10/22

7:00 am-11:10 pm

1 stop17h 10m

$149

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

sáb. 10/18

1:22 pm-4:37 pm

Nonstop2h 15m

San Antonio

mié. 10/22

7:00 am-11:10 pm

1 stop17h 10m

$151

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Antonio from

How to get the cheapest flight ticket from Denver to San Antonio

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Antonio?

If you aren’t able to travel during the month of September, then book flights to San Antonio from Denver during October instead. Flights to San Antonio in October, while not as cheap as those in September, still average around $177.

What is the cheapest day to depart on your flight to San Antonio?

The cheapest day to depart on your flight to San Antonio is on a Saturday when prices can be found for as low as $197. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to San Antonio on Monday is $279.

What is the cheapest time of day to depart on your flight to San Antonio?

According to our data, the cheapest time of day to fly to San Antonio is in the afternoon. momondo users have found flights departing from Denver to San Antonio in the afternoon for as low as $202. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to San Antonio are more costly in the evening, with an average ticket price of $271. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Denver Intl to San Antonio flight route?

Fly from Denver Intl to San Antonio for the best Denver Intl - San Antonio flight prices

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

You are more likely to see cheaper flights to San Antonio from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $227 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Antonio from Denver for as low as $141 on momondo.

What cabin class options are available on Denver Intl to San Antonio flights?

There are 4 cabin classes available to choose from on Denver Intl to San Antonio flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Denver to San Antonio flight prices changed over time?

As of September 2025, prices for Denver to San Antonio flights are approximately 76% more expensive when compared to flights at the same time last year.

When to book flights from Denver to San Antonio

Are you open to changing your travel dates? Check out the ideal times to fly from Denver to San Antonio according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Denver to San Antonio (DEN to SAT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Denver to San Antonio

Best Price Found

$104

Fastest flight time

2h 07m

Direct flights

Every day

Airports in San Antonio

1 airport
The best one-way flight to San Antonio from Denver in the past 72 hours is $104. The best round-trip flight deal from Denver to San Antonio found on momondo in the last 72 hours is $134.
The fastest flight from Denver to San Antonio takes 2h 07m
Direct flights go from Denver to San Antonio every day.
There is 1 airport near San Antonio: San Antonio (SAT)
Search flight deals

  • How far is Denver Intl to San Antonio by plane?

    San Antonio is 801.5 mi away from Denver Intl. Typically, this will take 2h 10m by plane in normal conditions.

  • When did momondo last update prices for flights from Denver Intl Airport to San Antonio Airport?

    Prices for flights from Denver Intl Airport to San Antonio Airport were last updated today.

  • How many operators does momondo search for flights from Denver Intl Airport to San Antonio Airport?

  • How old do you have to be to fly from Denver Intl Airport to San Antonio Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Denver Intl Airport to San Antonio Airport.

  • What documentation or ID do you need to fly to San Antonio Airport?

    The required travel and health documents for your San Antonio Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Antonio Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Denver to San Antonio?

  • What is the most popular airline from Denver to San Antonio?

Best airlines flying from Denver to San Antonio

Compare and see reviews for airlines that fly from Denver to San Antonio with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $60Free CancellationRating
5.8
3,173 reviews
Search Frontier flights
United AirlinesPriceFrom $146Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
American AirlinesPriceFrom $158Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $197Free CancellationRating
8.0
4,242 reviews
Search Southwest flights

  • Southwest Flights From Denver to San Antonio

    Southwest flies from Denver to San Antonio around 21 times per week, with 4,242 momondo users rating the airline 8.0/10. The cheapest Southwest deal from Denver to San Antonio in the last 72 hours was $197 (round-trip), much lower than the average airfare cost of $303 for Southwest flights on this route.

  • United Airlines Flights From Denver to San Antonio

    Across 8,926 United Airlines reviews on momondo, the average score is 7.4/10. United Airlines flies from Denver to San Antonio about 20 times each week, with ticket deals ranging from $146 to $324. Price data is based on momondo searches in the last 72 hours.

Traveling to a place near San Antonio?

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

Why use momondo?

Why should I use momondo to find a flight deal from Denver to San Antonio?

Finding the right flight to San Antonio from Denver is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to San Antonio quick and easy, saving you time and money.

Can I find flights from Denver to San Antonio with flexible booking policies on momondo?

All flight searches from Denver to San Antonio on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Denver to San Antonio?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Antonio from Denver.

I’m not ready to book a flight from Denver to San Antonio right now. Can momondo alert me if prices change?

If you are simply researching potential flights to San Antonio, momondo offers a useful price alert feature which will track prices for flights to San Antonio from Denver and alert you when they change.

An easier way to manage your San Antonio trip

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vie. 10/17
vie. 10/24
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