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$42+ Cheap flights from San Antonio to Denver (SAT - DEN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — DEN
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from San Antonio to Denver Intl are usually found in October or February, booked 76 days in advance, depart on a Thursday or Saturday and return on a Saturday

Cheap flight deals from San Antonio to Denver

Discover tips and strategies to find the most affordable flight options for your journey from San Antonio (SAT) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 15, 2025.

Round-trip from

$88
(Cheapflightsfares)

One-way from

$42
(Cheapflightsfares)

Popular in

June

Cheapest in

October

Average price

$177

Good round-trip deal

$164 or less

Good one-way deal

$106 or less
From San Antonio to Denver Intl
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One-way flight from San Antonio to Denver Intl
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Highest demand for flights based on searches. 11% potential increase in price ($25 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from San Antonio to Denver Intl.
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Price to beat on a one-way flight from San Antonio to Denver Intl.
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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 September 15, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1612:09 pmSAT - DEN
Nonstop2h 24mFrontier
Thu 10/164:27 pmDEN - SAT
Nonstop2h 14mFrontier
Deal found 9/13$88
This Cheapflightsfares deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/78:25 pmSAT - DEN
Nonstop2h 23mFrontier
Mon 11/104:16 pmDEN - SAT
Nonstop2h 14mFrontier
Deal found 9/13$89
This Cheapflightsfares deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/185:32 pmSAT - DEN
Nonstop2h 21mFrontier
Thu 10/238:00 amDEN - SAT
Nonstop2h 14mFrontier
Deal found 9/14$101
This Frontier deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/168:26 pmSAT - DEN
Nonstop2h 23mFrontier
Sat 10/251:22 pmDEN - SAT
Nonstop2h 15mFrontier
Deal found 9/15$102
This Priceline deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/28:25 pmSAT - DEN
Nonstop2h 23mFrontier
Sat 11/1511:00 amDEN - SAT
Nonstop2h 17mFrontier
Deal found 9/12$105
This Cheapflightsfares deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/37:25 pmSAT - DEN
Nonstop2h 23mFrontier
Sun 10/56:00 amDEN - SAT
Nonstop2h 10mFrontier
Deal found 9/14$107
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/185:32 pmSAT - DEN
Nonstop2h 21mFrontier
Sun 10/268:00 amDEN - SAT
Nonstop2h 14mFrontier
Deal found 9/15$110
This CheapOair deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/68:20 pmSAT - DEN
Nonstop2h 28mFrontier
Sat 10/111:22 pmDEN - SAT
Nonstop2h 15mFrontier
Deal found 9/13$112
This Frontier deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/83:59 pmSAT - DEN
Nonstop2h 26mFrontier
Sat 10/111:22 pmDEN - SAT
Nonstop2h 15mFrontier
Deal found 9/13$113
This CheapOair deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1310:46 pmSAT - DEN
1 stop6h 13mFrontier
Sat 11/1511:00 amDEN - SAT
Nonstop2h 17mFrontier
Deal found 9/13$115
This CheapOair deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/29:33 pmSAT - DEN
1 stop12h 32mFrontier
Mon 10/64:01 pmDEN - SAT
Nonstop2h 14mFrontier
Deal found 9/13$119

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from San Antonio to Denver that are best for you.

Fly from

San Antonio

Fly to

Denver

Route

Depart

Return

Price

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Mon 12/8

4:51 pm-12:16 am

1 stop8h 25m

Denver Intl

Fri 12/12

6:59 am-1:52 pm

1 stop5h 53m

$197

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 11/1

8:35 am-9:55 am

Nonstop2h 20m

Denver Intl

Tue 11/4

9:41 am-12:56 pm

Nonstop2h 15m

$207

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 10/18

6:00 am-11:48 am

1 stop6h 48m

Denver Intl

Sun 10/26

12:50 am-9:55 am

1 stop8h 05m

$207

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Fri 12/5

6:10 pm-11:16 pm

1 stop6h 06m

Denver Intl

Mon 12/8

3:14 pm-11:16 pm

1 stop7h 02m

$217

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 10/18

6:00 am-11:48 am

1 stop6h 48m

Denver Intl

Wed 10/22

4:47 pm-12:20 am

1 stop6h 33m

$237

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 10/18

6:50 am-11:25 am

2 stops5h 35m

Denver Intl

Sat 10/25

2:45 pm-9:35 pm

1 stop5h 50m

$240

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Mon 12/8

2:35 pm-7:40 pm

1 stop6h 05m

Denver Intl

Thu 12/11

3:05 pm-9:40 pm

2 stops5h 35m

$242

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 10/18

9:06 am-10:25 am

Nonstop2h 19m

Denver Intl

Sat 10/25

1:35 pm-4:45 pm

Nonstop2h 10m

$247

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Tue 10/21

6:41 am-1:52 pm

1 stop8h 11m

Denver Intl

Sun 10/26

12:50 am-9:55 am

1 stop8h 05m

$247

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Fri 10/17

6:15 pm-11:04 pm

1 stop5h 49m

Denver Intl

Fri 10/24

4:47 pm-12:20 am

1 stop6h 33m

$247

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 23 results
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The best insider tips for San Antonio to Denver flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your San Antonio to Denver trip
Airports
SAT

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

Read more about SATby Ramsey Qubein
DEN

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

Read more about DENby Emily Zemler
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on SAT

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more
Emily Zemler

Emily Zemler

Expert on DEN

Emily Zemler

Emily Zemler

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more

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?

Use this chart to determine the optimal time to book a round-trip flight from San Antonio to Denver. Price data was last updated on September 12, 2025.

To ensure you get the cheapest price possible for a flight from San Antonio to Denver, you should look to book at least 76 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?

Find hourly flight availability from San Antonio to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 48% 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?

Use this chart to determine the cheapest time to fly round-trip from San Antonio to Denver. Price data was last updated on September 14, 2025.

Travelers seeking maximum savings on their San Antonio to Denver flight should consider departing on Sunday 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.

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Denver. Reviews last updated September 15, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from San Antonio to Denver to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,954 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,929 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Frontier
5.8
Fair
3,172 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

Find useful and relevant information for your journey from San Antonio to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from San Antonio to Denver?

    If you wish to fly to Denver from San Antonio, then you need to book flights from San Antonio to Denver Intl. There are 11 flights from San Antonio (SAT) to Denver Intl (DEN) per day to choose from. Flights to Denver from San Antonio are available from 5 different airlines, which means you should have some options if you want to compare airfare deals. 2h 15m is how long a nonstop flight from San Antonio to Denver Intl typically takes.

  • How popular is this San Antonio to Denver flight route?

    The San Antonio to Denver Intl flight path was viewed by 172 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from San Antonio to Denver?

    Airlines like Delta and United Airlines fly from San Antonio to Denver in about 2h 20m. The time it takes to get you to your destination can typically vary by up to 6h 05m. Airlines will cover a distance of 795 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from San Antonio to Denver round-trip?

    Currently priced at $55, Frontier will fly you from San Antonio to Denver and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Delta - these airlines can fly you to your destination from $107 and $118, respectively. You may be able to fly from San Antonio to Denver for 71% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from San Antonio to Denver one-way?

    One-way options have recently been found by users for as low as $43 on Frontier. Other airlines that offer cheap prices include Delta from $109 and Southwest from $109 one-way.

  • What are the most reliable airlines from San Antonio to Denver?

    The top 3 most reliable airlines when flying from San Antonio to Denver are Southwest (82%), United Airlines (80%) and Lufthansa (79%).

  • What are the cheapest flights from San Antonio to Denver?

    Looking for the cheapest flight from San Antonio to Denver? While on average our users pay $212, our data indicates the cheapest price to be $70. The most popular route (San Antonio - Denver Intl), is priced around $83.

  • Can I find deals for flights from San Antonio to Denver that include hotel bookings?

    Yes. In addition to deals on San Antonio to Denver flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Antonio to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Antonio to Denver.

  • Can I find deals for business class flights from San Antonio to Denver?

    Yes. Cheapflights offers flight deals from San Antonio to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • 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.

See more FAQs

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Black Hawk
Westminster
Golden
Winter Park
Lakewood
Broomfield
Greeley
Lone Tree
Cripple Creek
Thornton
Silverthorne
Manitou Springs
Fort Morgan
Glendale
Wheat Ridge
Brighton
Longmont
Idaho Springs
Parker
Sterling

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Alternative routes for San Antonio to Denver

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from San Antonio to Denver

Discover the top 5 airlines that operate flights from San Antonio to Denver. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$55Average$145FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$107Average$283FlexibilityNo cancel feeOn-time71%
DeltaCheapest$118Average$196FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$149Average$330FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$177Average$304FlexibilityNo cancel feeOn-time63%

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