$69+ Flights from Denver to San Antonio

One-way flight from Denver Intl to San Antonio

Highest demand for flights based on searches. 21% potential increase in price ($56 potential increase over avg. RT price).

Cheapest flight prices on average. 4% potential price decrease ($10 potential savings vs. average RT price).

Average for round-trip flights in June 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 June 10, 2025.

Tue 7/152:45 pmDEN - SAT

Nonstop2h 17mFrontier

Tue 7/226:59 pmSAT - DEN

Nonstop2h 26mFrontier

Deal found 6/10

$137

Thu 8/712:15 pmDEN - SAT

Nonstop2h 05mSouthwest

Mon 8/112:10 pmSAT - DEN

Nonstop2h 15mSouthwest

Deal found 6/10

$157

Mon 8/115:05 pmDEN - SAT

1 stop4h 54mUnited Airlines

Fri 8/155:15 amSAT - DEN

Nonstop2h 19mUnited Airlines

Deal found 6/10

$187

Tue 7/296:10 pmDEN - SAT

1 stop5h 25mDelta

Thu 8/76:07 pmSAT - DEN

1 stop6h 21mDelta

Deal found 6/9

$197

Tue 6/247:20 amDEN - SAT

1 stop6h 12mAmerican Airlines

Tue 6/246:17 pmSAT - DEN

1 stop6h 27mAmerican Airlines

Deal found 6/9

$291

Sat 6/212:45 pmDEN - SAT

Nonstop2h 18mMultiple Airlines

Mon 6/306:35 pmSAT - DEN

1 stop14h 56mMultiple Airlines

Deal found 6/7

$332

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 June 10, 2025.

Tue 7/152:45 pmDEN - SAT

Nonstop2h 17mFrontier

Tue 7/226:59 pmSAT - DEN

Nonstop2h 26mFrontier

Deal found 6/10

$137

Thu 8/712:15 pmDEN - SAT

Nonstop2h 05mSouthwest

Mon 8/112:10 pmSAT - DEN

Nonstop2h 15mSouthwest

Deal found 6/10

$157

Tue 7/293:55 pmDEN - SAT

1 stop7h 40mDelta

Thu 8/76:07 pmSAT - DEN

1 stop6h 21mDelta

Deal found 6/10

$197

Tue 9/301:40 pmDEN - SAT

Nonstop2h 10mUnited Airlines

Tue 10/79:00 amSAT - DEN

Nonstop2h 19mUnited Airlines

Deal found 6/10

$227

Tue 6/247:20 amDEN - SAT

1 stop6h 12mAmerican Airlines

Tue 6/246:17 pmSAT - DEN

1 stop6h 27mAmerican Airlines

Deal found 6/9

$291

Sat 6/212:45 pmDEN - SAT

Nonstop2h 18mMultiple Airlines

Mon 6/306:35 pmSAT - DEN

1 stop14h 56mMultiple Airlines

Deal found 6/7

$332

Last-minute flights from Denver to San Antonio
Discover last-minute flight deals from Denver to San Antonio. Data last updated June 10, 2025 and is based on user searches.

Mon 6/1612:59 amDEN - SAT

1 stop7h 46mDelta

Tue 6/2412:45 pmSAT - DEN

1 stop8h 08mDelta

Deal found 6/10

$327

Tue 6/172:45 pmDEN - SAT

Nonstop2h 18mFrontier

Tue 6/246:59 pmSAT - DEN

Nonstop2h 30mFrontier

Deal found 6/10

$166

Tue 6/178:40 pmDEN - SAT

Nonstop2h 10mSouthwest

Mon 6/235:20 amSAT - DEN

Nonstop2h 15mSouthwest

Deal found 6/8

$434

Tue 6/177:06 pmDEN - SAT

2 stops22h 31mAlaska Airlines

Tue 6/247:37 pmSAT - DEN

1 stop27h 10mAlaska Airlines

Deal found 6/10

$798

Wed 6/185:01 amDEN - SAT

1 stop5h 52mAmerican Airlines

Sun 6/225:00 amSAT - DEN

1 stop4h 11mAmerican Airlines

Deal found 6/9

$347

Wed 6/188:35 pmDEN - SAT

Nonstop2h 21mUnited Airlines

Sun 6/225:35 amSAT - DEN

Nonstop2h 19mUnited Airlines

Deal found 6/9

$427

Fri 6/2012:59 amDEN - SAT

2 stops31h 48mMultiple Airlines

Mon 6/306:35 pmSAT - DEN

1 stop14h 56mMultiple Airlines

Deal found 6/8

$460

Sat 6/212:45 pmDEN - SAT

Nonstop2h 18mMultiple Airlines

Mon 6/306:35 pmSAT - DEN

1 stop14h 56mMultiple Airlines

Deal found 6/7

$332

Tue 6/247:20 amDEN - SAT

1 stop6h 12mAmerican Airlines

Tue 6/246:17 pmSAT - DEN

1 stop6h 27mAmerican Airlines

Deal found 6/9

$291

Tue 7/152:45 pmDEN - SAT

Nonstop2h 17mFrontier

Tue 7/226:59 pmSAT - DEN

Nonstop2h 26mFrontier

Deal found 6/10

$137

Sat 7/268:43 pmDEN - SAT

Nonstop2h 16mUnited Airlines

Mon 8/45:15 amSAT - DEN

Nonstop2h 19mUnited Airlines

Deal found 6/9

$237

Tue 7/298:40 pmDEN - SAT

Nonstop2h 10mSouthwest

Thu 8/77:10 pmSAT - DEN

1 stop4h 30mSouthwest

Deal found 6/9

$177

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 June 10, 2025.

Sat 8/92:45 pmDEN - SAT

Nonstop2h 17mFrontier

Deal found 6/10

$69

Thu 8/211:41 pmDEN - SAT

Nonstop2h 10mUnited Airlines

Deal found 6/10

$79

Thu 9/259:25 amDEN - SAT

1 stop3h 25mSouthwest

Deal found 6/10

$84

Tue 10/216:51 pmDEN - SAT

1 stop3h 51mAmerican Airlines

Deal found 6/8

$88

Wed 7/93:55 pmDEN - SAT

1 stop7h 40mDelta

Deal found 6/8

$99

Sun 7/277:00 amDEN - SAT

1 stop25h 47mSun Country Air

Deal found 6/8

$144

Sat 9/277:00 amDEN - SAT

2 stops33h 16mMultiple Airlines

Deal found 6/8

$159

Tue 7/157:06 pmDEN - SAT

2 stops22h 31mAlaska Airlines

Deal found 6/8

$268

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

Tue 7/15

2:45 pm-6:02 pm

Nonstop2h 17m

San Antonio

Tue 7/22

6:59 pm-8:25 pm

Nonstop2h 26m

$137

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Thu 8/7

12:15 pm-3:20 pm

Nonstop2h 05m

San Antonio

Mon 8/11

2:10 pm-3:25 pm

Nonstop2h 15m

$157

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Tue 7/29

3:55 pm-12:35 am

1 stop7h 40m

San Antonio

Thu 8/7

6:07 pm-11:28 pm

1 stop6h 21m

$197

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Tue 9/30

1:40 pm-4:50 pm

Nonstop2h 10m

San Antonio

Tue 10/7

9:00 am-10:19 am

Nonstop2h 19m

$227

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Tue 6/24

7:20 am-2:32 pm

1 stop6h 12m

San Antonio

Tue 6/24

6:17 pm-11:44 pm

1 stop6h 27m

$291

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Sat 6/21

2:45 pm-6:03 pm

Nonstop2h 18m

San Antonio

Mon 6/30

6:35 pm-8:31 am

1 stop14h 56m

$332

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Sat 8/9

2:45 pm-6:02 pm

Nonstop2h 17m

$69

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Thu 8/21

1:41 pm-4:51 pm

Nonstop2h 10m

$79

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Thu 9/25

9:25 am-1:50 pm

1 stop3h 25m

$84

DenverSan Antonio

DEN - SAT

DENSAT

Denver Intl

Tue 10/21

6:51 pm-11:42 pm

1 stop3h 51m

$88

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 14 results

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 31% 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 at noon 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 Monday (15 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 on average).

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.

8.0

Very good

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

8.0

Very good

8.0

Very good

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

4,289 reviews

8.0

Very good

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

7,951 reviews

8.0

Very good

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

8,783 reviews

8.0

Very good

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

8.0

Very good