$79+ Flights from San Antonio to Denver

One-way flight from San Antonio to Denver Intl

Highest demand for flights based on searches. 5% potential increase in price ($11 potential increase over avg. RT price).

Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).

Average for round-trip flights in June 2025

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

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

Find flight deals from San Antonio to Denver

Cheapest flights from San Antonio to Denver
Explore the most affordable flight options available from San Antonio to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Thu 7/318:14 pmSAT - DEN

Nonstop2h 31mFrontier

Tue 8/122:45 pmDEN - SAT

Nonstop2h 17mFrontier

Deal found 6/11

$144

Thu 8/145:15 amSAT - DEN

Nonstop2h 19mUnited Airlines

Mon 8/185:45 pmDEN - SAT

Nonstop2h 12mUnited Airlines

Deal found 6/10

$157

Sat 8/25:20 amSAT - DEN

Nonstop2h 15mSouthwest

Mon 8/49:25 amDEN - SAT

Nonstop2h 05mSouthwest

Deal found 6/11

$167

Thu 11/68:32 pmSAT - DEN

1 stop4h 05mAmerican Airlines

Sat 11/812:52 pmDEN - SAT

1 stop4h 48mAmerican Airlines

Deal found 6/11

$182

Sat 8/212:36 pmSAT - DEN

1 stop7h 53mDelta

Mon 8/43:55 pmDEN - SAT

1 stop7h 40mDelta

Deal found 6/11

$197

Best flights from San Antonio to Denver
Discover carefully curated flight deals from San Antonio to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2025.

Thu 7/318:14 pmSAT - DEN

Nonstop2h 31mFrontier

Thu 8/73:55 pmDEN - SAT

Nonstop2h 18mFrontier

Deal found 6/11

$144

Thu 8/145:15 amSAT - DEN

Nonstop2h 19mUnited Airlines

Mon 8/185:45 pmDEN - SAT

Nonstop2h 12mUnited Airlines

Deal found 6/10

$157

Sat 8/27:25 pmSAT - DEN

Nonstop2h 30mSouthwest

Mon 8/49:25 pmDEN - SAT

Nonstop2h 10mSouthwest

Deal found 6/10

$167

Sat 8/212:24 pmSAT - DEN

1 stop9h 00mDelta

Mon 8/412:59 amDEN - SAT

1 stop7h 46mDelta

Deal found 6/10

$197

Sun 8/37:35 pmSAT - DEN

1 stop4h 05mAmerican Airlines

Sat 8/3010:31 amDEN - SAT

1 stop7h 03mAmerican Airlines

Deal found 6/11

$212

Last-minute flights from San Antonio to Denver
Discover last-minute flight deals from San Antonio to Denver. Data last updated June 12, 2025 and is based on user searches.

Wed 6/185:25 amSAT - DEN

Nonstop2h 15mSouthwest

Sat 6/216:30 amDEN - SAT

Nonstop2h 05mSouthwest

Deal found 6/10

$337

Wed 6/189:10 amSAT - DEN

Nonstop2h 17mUnited Airlines

Sun 6/228:35 pmDEN - SAT

Nonstop2h 21mUnited Airlines

Deal found 6/11

$357

Thu 6/196:03 pmSAT - DEN

1 stop6h 19mDelta

Sat 6/213:55 pmDEN - SAT

1 stop5h 10mDelta

Deal found 6/10

$377

Thu 6/197:00 amSAT - DEN

2 stops28h 37mAlaska Airlines

Sun 6/2211:33 amDEN - SAT

2 stops17h 07mAlaska Airlines

Deal found 6/11

$933

Sat 6/216:59 pmSAT - DEN

Nonstop2h 30mFrontier

Tue 6/242:45 pmDEN - SAT

Nonstop2h 18mFrontier

Deal found 6/10

$166

Sat 6/217:24 pmSAT - DEN

1 stop5h 20mAmerican Airlines

Tue 6/247:20 amDEN - SAT

1 stop6h 12mAmerican Airlines

Deal found 6/10

$327

Sun 6/226:35 pmSAT - DEN

1 stop15h 32mMultiple Airlines

Sun 6/293:20 pmDEN - SAT

3 stops36h 40mMultiple Airlines

Deal found 6/10

$507

Tue 7/18:55 amSAT - DEN

Nonstop2h 17mUnited Airlines

Wed 7/29:40 amDEN - SAT

Nonstop2h 07mUnited Airlines

Deal found 6/11

$247

Tue 7/17:00 amSAT - DEN

1 stop7h 55mAmerican Airlines

Fri 7/46:00 amDEN - SAT

1 stop8h 28mAmerican Airlines

Deal found 6/11

$355

Tue 7/295:25 amSAT - DEN

Nonstop2h 15mSouthwest

Tue 7/298:40 pmDEN - SAT

Nonstop2h 10mSouthwest

Deal found 6/11

$177

Thu 7/318:14 pmSAT - DEN

Nonstop2h 31mFrontier

Thu 8/73:55 pmDEN - SAT

Nonstop2h 18mFrontier

Deal found 6/11

$144

Thu 7/316:03 pmSAT - DEN

1 stop5h 08mDelta

Mon 8/43:55 pmDEN - SAT

1 stop7h 40mDelta

Deal found 6/10

$217

One-way flights from San Antonio to Denver
Search for one-way flight options from San Antonio to Denver. Find affordable one-way fares based on user searches. Data last updated June 12, 2025.

Mon 8/44:30 pmSAT - DEN

Nonstop2h 32mUnited Airlines

Deal found 6/10

$79

Thu 8/145:35 amSAT - DEN

1 stop3h 55mSouthwest

Deal found 6/11

$84

Sat 8/166:05 amSAT - DEN

1 stop6h 19mAmerican Airlines

Deal found 6/12

$94

Tue 6/246:59 pmSAT - DEN

Nonstop2h 30mFrontier

Deal found 6/11

$98

Sat 8/212:24 pmSAT - DEN

1 stop9h 00mDelta

Deal found 6/10

$99

Fri 6/206:35 pmSAT - DEN

1 stop23h 08mSun Country Air

Deal found 6/11

$144

Wed 7/237:52 pmSAT - DEN

2 stops23h 20mMultiple Airlines

Deal found 6/11

$145

Tue 9/96:30 amSAT - DEN

2 stops29h 10mAlaska Airlines

Deal found 6/11

$229

Cheapflights Fare Finder

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 7/31

8:14 pm-9:45 pm

Nonstop2h 31m

Denver Intl

Thu 8/7

3:55 pm-7:13 pm

Nonstop2h 18m

$144

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Thu 8/14

5:15 am-6:34 am

Nonstop2h 19m

Denver Intl

Mon 8/18

5:45 pm-8:57 pm

Nonstop2h 12m

$157

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 8/2

7:25 pm-8:55 pm

Nonstop2h 30m

Denver Intl

Mon 8/4

9:25 pm-12:35 am

Nonstop2h 10m

$167

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 8/2

8:00 am-3:00 pm

1 stop8h 00m

Denver Intl

Tue 8/5

4:37 pm-12:14 am

1 stop6h 37m

$197

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sun 8/3

7:35 pm-10:40 pm

1 stop4h 05m

Denver Intl

Sat 8/30

10:31 am-6:34 pm

1 stop7h 03m

$212

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Wed 8/27

1:44 pm-3:00 pm

Nonstop2h 16m

$79

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Thu 8/14

5:35 am-8:30 am

1 stop3h 55m

$84

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 8/16

6:05 am-11:24 am

1 stop6h 19m

$94

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Tue 6/24

6:59 pm-8:29 pm

Nonstop2h 30m

$98

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Tue 7/15

8:00 am-3:00 pm

1 stop8h 00m

$99

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 13 results

The best insider tips for San Antonio to Denver flights

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

Airlines

Frontier

Frontier offers extra comfort seats with 32” separation for a fee, enhancing your travel experience.

Early morning flights have a better chance of on-time departure, avoiding carry-over delays.

Read more about Frontierby Marisa Garcia

United Airlines

United Economy Plus offers extra legroom seats towards the front of the economy cabin.

United's MileagePlus program allows pooling miles for tickets or upgrades, benefiting infrequent flyers.

Read more about United Airlinesby Harriet Baskas

Southwest

Southwest offers two free checked bags, including oversized items like skis or golf clubs.

Enjoy free in-flight entertainment streamed to your device, including movies and live TV.

Read more about Southwestby Marisa Garcia

Airports

SAT

For longer trips, economy lots with shuttle service offer better value than the new parking garage at SAT.

DEN

Take the A Line train from DEN to Union Station for a quick, cost-effective trip to downtown Denver.

Our travel experts

Marisa Garcia

Expert on Frontier and Southwest

Harriet Baskas

Expert on United Airlines

Ramsey Qubein

Expert on SAT

Emily Zemler

Expert on DEN

Best time to book a flight from San Antonio to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from San Antonio 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 San Antonio to Denver

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

To ensure you get the cheapest price possible for a flight from San Antonio to Denver, you should look to book at least 39 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 San Antonio to Denver?

Currently, October is the cheapest month in which you can book a flight from San Antonio to Denver (average of $197). Flying from San Antonio to Denver in March is currently the most expensive (average of $278). 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 SAT to DEN?

Unlike at noon, when flights are generally more expensive, you can save up to 55% on flights from San Antonio to Denver by exploring options for tickets in the evening.

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

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

Weekly flight availability from San Antonio to Denver

The most flights from SAT to DEN are scheduled on a Monday (14 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

Rainfall in Denver by month

In terms of precipitation, rainfall in Denver ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Denver when rainfall is around 0.5 in.

Temperature in Denver by month

If weather is an important factor for your trip to Denver, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Denver

To help decide which airline to fly from San Antonio to Denver, see what other customers have to say about Alaska Airlines, Southwest and Delta. Users can see the overall rating for each airline as well as how each is rated 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

4,287 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

7,946 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

8,790 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