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.
$25+ 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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — DEN
Aug 2 — Aug 91
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from San Antonio to Denver with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from San Antonio to Denver Intl are usually found in August or September, booked 36 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 28, 2025.
Round-trip from | $125 (Cheapflightsfares) |
|---|---|
One-way from | $25 (Cheapflightsfares) |
Popular in | June |
Cheapest in | August |
Average price | $198 |
Good round-trip deal | $193 or less |
Good one-way deal | $111 or less |
Find flight deals from San Antonio to Denver
Cheapest flights from San Antonio to DenverExplore 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 28, 2025.
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 28, 2025.
This Frontier deal was found by Cheapflights users on 7/28. 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.
Sun 9/149:55 amSAT - DEN
Nonstop2h 27mFrontier
Fri 9/193:45 pmDEN - SAT
Nonstop2h 15mFrontier
Deal found 7/28![Frontier logo]()
$125
This Delta deal was found by Cheapflights users on 7/27. 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 10/47:15 amSAT - DEN
1 stop5h 45mDelta
Fri 10/1012:50 amDEN - SAT
1 stop8h 00mDelta
Deal found 7/27![Delta logo]()
$197
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 28, 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
Fri 8/22
8:18 pm-9:49 pm
Nonstop2h 31m
Denver Intl
Sun 8/24
4:10 pm-7:33 pm
Nonstop2h 23m
$125
San AntonioDenver
SAT - DEN
SATDEN
San Antonio
Sat 9/27
5:20 pm-6:40 pm
Nonstop2h 20m
Denver Intl
Tue 9/30
1:00 pm-4:05 pm
Nonstop2h 05m
$187
San AntonioDenver
SAT - DEN
SATDEN
San Antonio
Sat 10/4
3:00 pm-9:52 pm
1 stop7h 52m
Denver Intl
Sat 10/11
6:23 pm-12:31 am
1 stop5h 08m
$197
San AntonioDenver
SAT - DEN
SATDEN
San Antonio
Wed 8/20
5:00 am-9:45 am
1 stop5h 45m
Denver Intl
Wed 8/27
7:20 am-2:11 pm
1 stop5h 51m
$227
San AntonioDenver
SAT - DEN
SATDEN
San Antonio
Sat 10/18
4:12 pm-5:36 pm
Nonstop2h 24m
$25
San AntonioDenver
SAT - DEN
SATDEN
San Antonio
Sat 10/25
5:40 pm-6:55 pm
Nonstop2h 15m
$79
San AntonioDenver
SAT - DEN
SATDEN
San Antonio
Sat 8/30
5:10 pm-10:15 pm
1 stop6h 05m
$94
San AntonioDenver
SAT - DEN
SATDEN
San Antonio
Sat 9/27
12:40 pm-7:17 pm
1 stop7h 37m
$99
San AntonioDenver
SAT - DEN
SATDEN
San Antonio
Mon 8/18
4:30 pm-6:02 pm
Nonstop2h 32m
$154
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
![United Airlines]()
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.
![Southwest]()
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.
Airports
Our travel experts
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 July 25, 2025.
To ensure you get the cheapest price possible for a flight from San Antonio to Denver, you should look to book at least 36 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 28, 2025.
Unlike at noon, when flights are generally more expensive, you can save up to 50% 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 July 27, 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 28, 2025.
The most flights from SAT to DEN are scheduled on a Monday (14 on average). You will have fewer flight options on Tuesday, 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 28, 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.
Comfort
8.0
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentGina,Jul 2025
LAS - DEN
Comfort
8.0
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentGina,Jul 2025
LAS - DEN
Comfort
8.0
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentGina,Jul 2025
LAS - DEN
Comfort
8.0
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentGina,Jul 2025
LAS - DEN
Comfort
8.0
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentGina,Jul 2025
LAS - DEN
Comfort
8.0
Overall
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentGina,Jul 2025
LAS - DEN
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.
Traveling to a place near Denver?
Book flights to Denver if you plan to visit one of these locationsWestminster
Black Hawk
Winter Park
Lakewood
Cripple Creek
Brighton
Silverthorne
Golden
Thornton
Greeley
Frisco
Grand Lake
Manitou Springs
Central City
Fort Morgan
Glendale
Copper Mountain
Wheat Ridge
Longmont
Broomfield
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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.
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 28, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$41 | Average$138 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$107 | Average$260 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$118 | Average$176 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$148 | Average$327 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$177 | Average$306 | FlexibilityNo cancel fee | On-time63% |