$68+ Flights from Denver to San Antonio

One-way flight from Denver Intl to San Antonio

Highest demand for flights based on searches. 19% potential increase in price ($54 potential increase over avg. RT price).

Cheapest flight prices on average. 4% potential price decrease ($9 potential savings vs. average RT price).

Average for round-trip flights in July 2025

Price to beat on a round-trip flight from Denver Intl to San Antonio.

Price to beat on a one-way flight from Denver Intl to San Antonio.

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 July 11, 2025.

Thu 7/243:55 pmDEN - SAT

Nonstop2h 18mFrontier

Sun 7/278:14 pmSAT - DEN

Nonstop2h 31mFrontier

Deal found 7/9

$105

Wed 9/105:35 pmDEN - SAT

Nonstop2h 11mUnited Airlines

Sat 9/138:55 amSAT - DEN

Nonstop2h 18mUnited Airlines

Deal found 7/10

$133

Sat 8/96:05 amDEN - SAT

1 stop6h 10mSouthwest

Sat 8/165:20 pmSAT - DEN

Nonstop2h 20mSouthwest

Deal found 7/8

$142

Wed 9/109:04 amDEN - SAT

1 stop4h 01mAmerican Airlines

Mon 9/157:00 amSAT - DEN

1 stop5h 51mAmerican Airlines

Deal found 7/10

$159

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 July 11, 2025.

Thu 7/243:55 pmDEN - SAT

Nonstop2h 18mFrontier

Sun 7/278:14 pmSAT - DEN

Nonstop2h 31mFrontier

Deal found 7/9

$105

Wed 9/105:35 pmDEN - SAT

Nonstop2h 11mUnited Airlines

Sat 9/138:55 amSAT - DEN

Nonstop2h 18mUnited Airlines

Deal found 7/10

$133

Sat 8/96:05 amDEN - SAT

1 stop6h 10mSouthwest

Sat 8/165:20 pmSAT - DEN

Nonstop2h 20mSouthwest

Deal found 7/8

$142

Wed 9/109:04 amDEN - SAT

1 stop4h 01mAmerican Airlines

Mon 9/157:00 amSAT - DEN

1 stop5h 51mAmerican Airlines

Deal found 7/10

$159

Last-minute flights from Denver to San Antonio
Discover last-minute flight deals from Denver to San Antonio. Data last updated July 11, 2025 and is based on user searches.

Sat 7/198:43 pmDEN - SAT

Nonstop2h 16mUnited Airlines

Wed 8/1311:15 amSAT - DEN

Nonstop2h 17mUnited Airlines

Deal found 7/8

$235

Sat 7/1910:26 amDEN - SAT

1 stop4h 25mAmerican Airlines

Wed 8/135:00 amSAT - DEN

1 stop5h 45mAmerican Airlines

Deal found 7/8

$258

Sat 7/196:30 amDEN - SAT

Nonstop2h 05mSouthwest

Sat 7/197:25 pmSAT - DEN

Nonstop2h 30mSouthwest

Deal found 7/9

$337

Sun 7/203:55 pmDEN - SAT

Nonstop2h 18mFrontier

Sat 7/266:59 pmSAT - DEN

Nonstop2h 26mFrontier

Deal found 7/10

$153

Sun 7/203:55 pmDEN - SAT

1 stop7h 40mDelta

Tue 8/1212:05 pmSAT - DEN

1 stop9h 11mDelta

Deal found 7/8

$297

Thu 7/243:55 pmDEN - SAT

Nonstop2h 18mFrontier

Sun 7/278:14 pmSAT - DEN

Nonstop2h 31mFrontier

Deal found 7/9

$105

Fri 8/86:25 pmDEN - SAT

1 stop5h 10mDelta

Fri 8/156:11 pmSAT - DEN

1 stop7h 04mDelta

Deal found 7/9

$197

Sat 8/96:05 amDEN - SAT

1 stop6h 10mSouthwest

Sat 8/165:20 pmSAT - DEN

Nonstop2h 20mSouthwest

Deal found 7/8

$142

Sat 8/98:43 pmDEN - SAT

Nonstop2h 16mUnited Airlines

Mon 8/114:30 pmSAT - DEN

Nonstop2h 32mUnited Airlines

Deal found 7/8

$153

Sat 8/97:16 amDEN - SAT

1 stop5h 55mAmerican Airlines

Sat 8/166:00 amSAT - DEN

1 stop6h 50mAmerican Airlines

Deal found 7/9

$159

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 July 11, 2025.

Mon 9/84:01 pmDEN - SAT

Nonstop2h 14mFrontier

Deal found 7/10

$68

Sat 8/166:15 amDEN - SAT

1 stop4h 55mSouthwest

Deal found 7/10

$77

Thu 8/146:37 pmDEN - SAT

1 stop4h 03mAmerican Airlines

Deal found 7/9

$80

Mon 8/48:43 pmDEN - SAT

Nonstop2h 16mUnited Airlines

Deal found 7/10

$87

Tue 8/53:55 pmDEN - SAT

1 stop7h 40mDelta

Deal found 7/10

$99

Thu 8/75:42 pmDEN - SAT

2 stops24h 40mMultiple Airlines

Deal found 7/8

$134

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

$105

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Wed 9/10

1:41 pm-4:51 pm

Nonstop2h 10m

San Antonio

Sat 9/13

8:55 am-10:13 am

Nonstop2h 18m

$133

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Sat 8/9

6:05 am-1:15 pm

1 stop6h 10m

San Antonio

Sat 8/16

5:20 pm-6:40 pm

Nonstop2h 20m

$142

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Wed 9/10

9:04 am-2:05 pm

1 stop4h 01m

San Antonio

Mon 9/15

7:00 am-11:51 am

1 stop5h 51m

$159

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Mon 9/8

4:01 pm-7:15 pm

Nonstop2h 14m

$68

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Sat 8/16

6:15 am-12:10 pm

1 stop4h 55m

$77

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Thu 8/14

6:37 pm-11:40 pm

1 stop4h 03m

$80

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Mon 8/4

8:43 pm-11:59 pm

Nonstop2h 16m

$87

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Tue 8/5

3:55 pm-12:35 am

1 stop7h 40m

$99

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Thu 8/7

5:42 pm-7:22 pm

2 stops24h 40m

$134

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/10

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

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

SAT

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

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 29% 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?

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. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Denver to San Antonio

The most flights from DEN to SAT are scheduled on a Thursday (16 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

How much does it cost to fly round-trip from Denver to San Antonio?

Reviews of airlines servicing San Antonio

See what other customers who have flown with Southwest, Delta, and United 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.

8.0

Very good

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

8.0

Very good

8.0

Very good

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Delta

8.0

Very good

7,952 reviews

8.0

Very good

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

United Airlines

7.4

Good

8,846 reviews

8.0

Very good

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

American Airlines

7.2

Good

10,000 reviews

8.0

Very good

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Frontier

5.9

Fair

3,271 reviews

8.0

Very good