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$75+ 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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — DEN
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheapflights Tip: The best prices from San Antonio to Denver Intl are usually found in August or September, booked 39 days in advance, depart on a Thursday or Saturday and return on a Tuesday

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 July 3, 2025.

Round-trip from

$137
(Priceline)

One-way from

$75
(Frontier)

Popular in

December

Cheapest in

August

Average price

$172

Good round-trip deal

$255 or less

Good one-way deal

$131 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. 5% potential increase in price ($9 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 3, 2025.

This Priceline deal was found by Cheapflights users on 7/2. 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.
Mon 8/251:56 pmSAT - DEN
1 stop7h 02mFrontier
Fri 8/294:10 pmDEN - SAT
Nonstop2h 23mFrontier
Deal found 7/2$138
This Southwest deal was found by Cheapflights users on 7/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/165:35 amSAT - DEN
Nonstop2h 10mSouthwest
Sat 8/236:15 amDEN - SAT
1 stop6h 15mSouthwest
Deal found 7/1$187
This Delta deal was found by Cheapflights users on 7/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/212:24 pmSAT - DEN
1 stop9h 00mDelta
Mon 8/412:59 amDEN - SAT
1 stop7h 41mDelta
Deal found 7/2$197
This American Airlines deal was found by Cheapflights users on 7/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/275:00 amSAT - DEN
1 stop5h 41mAmerican Airlines
Tue 9/305:44 amDEN - SAT
1 stop4h 11mAmerican Airlines
Deal found 7/3$202

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 July 3, 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

Thu 7/24

8:14 pm-9:45 pm

Nonstop2h 31m

Denver Intl

Sun 7/27

3:55 pm-7:13 pm

Nonstop2h 18m

$137

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 8/2

12:24 pm-8:24 pm

1 stop9h 00m

Denver Intl

Mon 8/4

12:59 am-9:40 am

1 stop7h 41m

$197

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 9/27

1:44 pm-8:00 pm

1 stop7h 16m

Denver Intl

Tue 9/30

5:44 am-11:54 am

1 stop5h 10m

$202

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Tue 7/8

6:59 pm-8:25 pm

Nonstop2h 26m

$75

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 8/16

10:16 am-3:49 pm

1 stop6h 33m

$94

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Sat 8/2

12:24 pm-8:24 pm

1 stop9h 00m

$99

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Fri 9/26

5:35 am-8:30 am

1 stop3h 55m

$104

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Wed 8/6

1:43 pm-3:00 pm

Nonstop2h 17m

$129

San AntonioDenver

SAT - DEN

SATDEN

San Antonio

Wed 8/6

7:52 pm-6:12 pm

2 stops23h 20m

$153

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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
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.

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
Marisa Garcia

Marisa Garcia

Expert on Frontier and Southwest

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
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 June 27, 2025.

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?

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 July 3, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 53% 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 June 29, 2025.

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

Explore weekly flight availability from San Antonio to Denver. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 3, 2025.

The most flights from SAT to DEN are scheduled on a Thursday (15 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

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 July 3, 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
4,266 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Southwest
8.0
Very good
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Delta
8.0
Very good
7,982 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
United Airlines
7.4
Good
8,861 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Frontier
5.9
Fair
3,286 reviews
Southwest
8.0
Very good
4,266 reviews

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

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 10 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 202 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Currently priced at $137, 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 Delta and American Airlines - these airlines can fly you to your destination from $197 and $202, respectively. You may be able to fly from San Antonio to Denver for 23% 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 $75 on Frontier. Other airlines that offer cheap prices include American Airlines from $94 and Delta from $99 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 SkyWest Airlines (93%), Lufthansa (84%) and United Airlines (78%).

  • 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 $874, our data indicates the cheapest price to be $78. The most popular route (San Antonio - Denver Intl), is priced around $118.

  • 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 San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
Westminster
Black Hawk
Winter Park
Lakewood
Cripple Creek
Golden
Brighton
Silverthorne
Thornton
Frisco
Broomfield
Grand Lake
Manitou Springs
Central City
Fort Morgan
Glendale
Copper Mountain
Wheat Ridge
Longmont
Idaho Springs

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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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$39Average$130FlexibilityNo cancel feeOn-time62%
DeltaCheapest$118Average$176FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$148Average$310FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$158Average$237FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$178Average$308FlexibilityNo cancel feeOn-time63%

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