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Cheap flights from San Antonio to Denver from $39

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Antonio to Denver departing on 11/15. 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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Find the cheapest flights from San Antonio to Denver

Cheap round-trip flights

Frontier Logo
2:08 pm - 8:23 pmSAT-DEN
7h 15m1 stop
Frontier Logo
11:11 am - 2:27 pmDEN-SAT
2h 16mnonstop
$99Frontier
Find Deal
Thu, Oct 2 - Sat, Oct 4
Frontier Logo
8:38 pm - 10:01 pmSAT-DEN
2h 23mnonstop
Frontier Logo
11:00 am - 2:17 pmDEN-SAT
2h 17mnonstop
$101Frontier
Find Deal
Thu, Nov 13 - Sat, Nov 15
Frontier Logo
5:32 pm - 6:53 pmSAT-DEN
2h 21mnonstop
Frontier Logo
8:00 am - 11:14 amDEN-SAT
2h 14mnonstop
$102Frontier
Find Deal
Sat, Oct 18 - Thu, Oct 23
Frontier Logo
5:32 pm - 6:53 pmSAT-DEN
2h 21mnonstop
Frontier Logo
4:21 pm - 7:35 pmDEN-SAT
2h 14mnonstop
$105Frontier
Find Deal
Sat, Oct 18 - Mon, Oct 20
Frontier Logo
5:32 pm - 6:53 pmSAT-DEN
2h 21mnonstop
Frontier Logo
8:00 am - 11:14 amDEN-SAT
2h 14mnonstop
$107Frontier
Find Deal
Sat, Oct 18 - Thu, Oct 23
Frontier Logo
3:59 pm - 5:25 pmSAT-DEN
2h 26mnonstop
Frontier Logo
8:00 am - 11:14 amDEN-SAT
2h 14mnonstop
$108Frontier
Find Deal
Wed, Oct 22 - Sun, Oct 26
Frontier Logo
8:26 pm - 9:49 pmSAT-DEN
2h 23mnonstop
Frontier Logo
12:00 pm - 3:14 pmDEN-SAT
2h 14mnonstop
$109Frontier
Find Deal
Thu, Oct 16 - Tue, Oct 21
Frontier Logo
12:09 pm - 1:33 pmSAT-DEN
2h 24mnonstop
Frontier Logo
1:22 pm - 4:37 pmDEN-SAT
2h 15mnonstop
$110Frontier
Find Deal
Thu, Oct 16 - Sat, Oct 25
Frontier Logo
5:32 pm - 6:53 pmSAT-DEN
2h 21mnonstop
Frontier Logo
4:27 pm - 7:41 pmDEN-SAT
2h 14mnonstop
$113Frontier
Find Deal
Sat, Oct 18 - Fri, Oct 24
Multiple Airlines Logo
5:32 pm - 6:53 pmSAT-DEN
2h 21mnonstop
Multiple Airlines Logo
8:00 am - 11:40 pmDEN-SAT
14h 40m1 stop
$143Multiple Airlines
Find Deal
Sat, Oct 18 - Wed, Oct 22

Frontier flights from San Antonio to Denver

Our best Frontier deals on San Antonio to Denver flight tickets
Frontier
Oct 2
SAT2:08 pmSan Antonio
7h 15m
1 stop
DEN8:23 pmDenver Intl
Oct 4
DEN11:11 amDenver Intl
2h 16m
SAT2:27 pmSan Antonio
$99
Find similar
Frontier
Nov 13
SAT8:38 pmSan Antonio
2h 23m
DEN10:01 pmDenver Intl
Nov 15
DEN11:00 amDenver Intl
2h 17m
SAT2:17 pmSan Antonio
$101
Find similar
Frontier
Oct 18
SAT5:32 pmSan Antonio
2h 21m
DEN6:53 pmDenver Intl
Oct 23
DEN8:00 amDenver Intl
2h 14m
SAT11:14 amSan Antonio
$102
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from San Antonio to Denver 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 September 17, 2025.
Use the filters below to find and compare flights from San Antonio to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Thu 10/2

2:08 pm-8:23 pm

1 stop7h 15m

Denver Intl

Sat 10/4

11:11 am-2:27 pm

Nonstop2h 16m

$99

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Thu 11/13

8:38 pm-10:01 pm

Nonstop2h 23m

Denver Intl

Sat 11/15

11:00 am-2:17 pm

Nonstop2h 17m

$101

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 10/18

5:32 pm-6:53 pm

Nonstop2h 21m

Denver Intl

Thu 10/23

8:00 am-11:14 am

Nonstop2h 14m

$102

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 10/18

5:32 pm-6:53 pm

Nonstop2h 21m

Denver Intl

Mon 10/20

4:21 pm-7:35 pm

Nonstop2h 14m

$105

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 10/18

5:32 pm-6:53 pm

Nonstop2h 21m

Denver Intl

Thu 10/23

8:00 am-11:14 am

Nonstop2h 14m

$107

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Wed 10/22

3:59 pm-5:25 pm

Nonstop2h 26m

Denver Intl

Sun 10/26

8:00 am-11:14 am

Nonstop2h 14m

$108

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Thu 10/16

8:26 pm-9:49 pm

Nonstop2h 23m

Denver Intl

Tue 10/21

12:00 pm-3:14 pm

Nonstop2h 14m

$109

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Thu 10/16

12:09 pm-1:33 pm

Nonstop2h 24m

Denver Intl

Sat 10/25

1:22 pm-4:37 pm

Nonstop2h 15m

$110

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 10/18

5:32 pm-6:53 pm

Nonstop2h 21m

Denver Intl

Fri 10/24

4:27 pm-7:41 pm

Nonstop2h 14m

$113

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 10/18

5:32 pm-6:53 pm

Nonstop2h 21m

Denver Intl

Wed 10/22

8:00 am-11:40 pm

1 stop14h 40m

$143

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 Denver from

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

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 Denver?

The cheapest month to fly to Denver from San Antonio is in October. Flight prices, which tend to average around $148, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in October, then you should wait until February to fly from San Antonio, when ticket prices are also cheap, with an average price of $156.

What is the cheapest day to depart on your flight to Denver?

The cheapest day to depart on your flight to Denver is on a Thursday when prices can be found for as low as $284. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Monday, with ticket prices averaging around $434.

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

The cheapest time of day to fly to Denver is in the evening when flights can be purchased for as low as $211. Flights in the morning are often more expensive with an average ticket price of $403.

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

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

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

You are more likely to see cheaper flights to Denver from San Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $191 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from San Antonio for as low as $157 on momondo.

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

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

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

As of September 2025, prices for San Antonio to Denver flights are approximately 22% more expensive when compared to flights at the same time last year.

When to book flights from San Antonio to Denver

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

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

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

Best Price Found

$105

Fastest flight time

2h 15m

Direct flights

Every day

Airports in Denver

1 airport
The best one-way flight to Denver from San Antonio in the past 72 hours is $105. The best round-trip flight deal from San Antonio to Denver found on momondo in the last 72 hours is $161.
The fastest flight from San Antonio to Denver takes 2h 15m
Direct flights go from San Antonio to Denver every day.
There is 1 airport near Denver: Denver Intl (DEN)
Search flight deals

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

    The distance between San Antonio and Denver Intl is about 801.5 mi. A reasonable flight in good conditions will take 2h 21m.

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

    Prices for flights from San Antonio Airport to Denver Intl Airport are updated daily.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to Denver Intl Airport.

  • What documentation or ID do you need to fly to Denver Intl Airport?

    The required travel and health documents for your Denver Intl 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 Denver Intl 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 San Antonio to Denver?

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

Best airlines flying from San Antonio to Denver

Compare and see reviews for airlines that fly from San Antonio to Denver with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $55Free CancellationRating
5.8
3,173 reviews
Search Frontier flights
American AirlinesPriceFrom $107Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $118Free CancellationRating
7.9
7,961 reviews
Search Delta flights
United AirlinesPriceFrom $149Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
SouthwestPriceFrom $177Free CancellationRating
8.0
4,242 reviews
Search Southwest flights

  • Southwest Flights From San Antonio to Denver

    Across 21 Southwest flights from San Antonio to Denver this week, the average price was $304, with the best Southwest deals starting from $177 round-trip. 4,242 users have rated Southwest on momondo, with an average score of 8.0/10.

  • United Airlines Flights From San Antonio to Denver

    $149 is the best United Airlines flight deal from San Antonio to Denver found on momondo over the last 72 hours. The average United Airlines ticket price found was closer to $330, however, with flight time and availability significantly affecting the price. United Airlines (7.4/10 from 8,926 user reviews) flies into Denver from San Antonio 26 times in an average week so prices can vary.

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Estes Park
Breckenridge
Black Hawk
Aurora
Fort Collins
Keystone
Cripple Creek
Boulder
Manitou Springs
Longmont
Lakewood
Greeley
Thornton
Westminster
Winter Park
Copper Mountain
Frisco
Grand Lake
Silverthorne
Central City

Why use momondo?

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

Finding the right flight to Denver from San Antonio 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 Denver quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for San Antonio to Denver flights to just show those with flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Antonio to Denver.

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

Of course. momondo tracks the price of San Antonio to Denver flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Denver trip

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