DEN - SAT

$73 Find Cheap Flights from Denver to San Antonio - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to San Antonio departing on 9/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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Everything you should know

Cheapest round-trip
$168
Typical prices: $138-$264
Frontier
Thu 8/6Tue 8/11
DEN - SAT • Non-stop
Cheapest one-way
$73
Typical prices: $114-$222
Frontier
Tue 9/1
DEN - SAT • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Frontier Economy Bundle adds a carry-on and seat selection for better value.
United Economy Plus adds legroom, while Southwest offers free snacks.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $168 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Frontier, Southwest and United Airlines. Average duration is 2h 12m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 26% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 28% price drop
Most popular
Good to know
Good to know
+1
+1
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We hope you love your trip to San Antonio!
Flight Deals
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Expert advice
Flight Deals

Cheap Flights from Denver to San Antonio (DEN-SAT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to San Antonio that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denver to San Antonio

Thu, Aug 6 - Tue, Aug 11
Frontier Logo
3:40 pm - 6:54 pm
DEN
-
SAT
2h 14mnonstop
Frontier Logo
7:49 pm - 9:24 pm
SAT
-
DEN
2h 35mnonstop
$168Frontier
Tue, Aug 25 - Thu, Aug 27
Frontier Logo
4:13 pm - 7:31 pm
DEN
-
SAT
2h 18mnonstop
Frontier Logo
8:26 pm - 10:03 pm
SAT
-
DEN
2h 37mnonstop
$177Frontier
Tue, Aug 4 - Wed, Aug 19
Frontier Logo
3:30 pm - 6:44 pm
DEN
-
SAT
2h 14mnonstop
Frontier Logo
8:26 pm - 10:03 pm
SAT
-
DEN
2h 37mnonstop
$178Frontier
Tue, Aug 4 - Wed, Aug 19
Frontier Logo
3:30 pm - 6:44 pm
DEN
-
SAT
2h 14mnonstop
Frontier Logo
8:26 pm - 10:03 pm
SAT
-
DEN
2h 37mnonstop
$180Frontier
Thu, Oct 22 - Tue, Oct 27
Frontier Logo
10:59 am - 2:15 pm
DEN
-
SAT
2h 16mnonstop
Frontier Logo
11:08 am - 12:33 pm
SAT
-
DEN
2h 25mnonstop
$182Frontier
Thu, Sep 3 - Tue, Sep 8
Frontier Logo
4:13 pm - 7:31 pm
DEN
-
SAT
2h 18mnonstop
Frontier Logo
8:26 pm - 10:03 pm
SAT
-
DEN
2h 37mnonstop
$186Frontier
Mon, Aug 17 - Thu, Aug 20
Frontier Logo
3:40 pm - 6:54 pm
DEN
-
SAT
2h 14mnonstop
Frontier Logo
8:26 pm - 10:03 pm
SAT
-
DEN
2h 37mnonstop
$188Frontier
Tue, Aug 25 - Wed, Aug 26
Frontier Logo
10:00 am - 9:29 pm
DEN
-
SAT
10h 29m
1 stop
Frontier Logo
8:26 pm - 10:03 pm
SAT
-
DEN
2h 37mnonstop
$198Frontier
Sat, Jul 25 - Sat, Aug 1
Frontier Logo
3:30 pm - 6:44 pm
DEN
-
SAT
2h 14mnonstop
Frontier Logo
9:32 pm - 3:48 am
SAT
-
DEN
7h 16m
1 stop
$203Frontier
Thu, Sep 24 - Sat, Oct 10
Frontier Logo
11:59 pm - 9:02 am
DEN
-
SAT
8h 03m
1 stop
Frontier Logo
12:16 pm - 1:41 pm
SAT
-
DEN
2h 25mnonstop
$204Frontier
Booking Insights

KAYAK's insights & trends for Denver to San Antonio flights

Get data-powered insights and trends into flights from Denver to San Antonio to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Denver to San Antonio?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Denver to San Antonio departing in August.

What’s the cheapest day of the week to fly from Denver to San Antonio?

The average price of all round-trip flights from Denver to San Antonio clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to San Antonio on a Friday and more expensive on a Sunday. On your return trip to Denver, you should consider flying back on a Thursday, and avoid Sundays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to San Antonio, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Denver to San Antonio is September, where tickets cost $173 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $367 and $287 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Denver to San Antonio, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Denver to San Antonio, you should book around 2 weeks before departure, which saves you about 26% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Expert advice

Expert advice for your flight from Denver to San Antonio

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Frontier and United Airlines

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Brandon Schultz

Brandon Schultz

Expert on SAT

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Harriet Baskas

Harriet Baskas

Expert on DEN

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.

Good to know

Low seasonAugust
Cheapest flight$73
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from Denver to San Antonio

When to book flights from Denver to San Antonio

Are your dates flexible? Find out the best times to travel from Denver to San Antonio based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Denver to San Antonio

  • What flight options do I have from Denver to San Antonio?

    You can fly nonstop from Denver International Airport (DEN) to San Antonio International Airport (SAT). Some of the airlines that have nonstop flights on this route are Frontier, United Airlines, and Southwest Airlines. You can also find layover flights from DEN to SAN. Frontier Airlines also has a flight with a layover at Harry Reid International Airport (LAS). You can find a flight by American Airlines with a layover at the Dallas/Fort Worth International Airport (DFW).

  • Is there an onsite hotel at Denver International Airport (DEN)?

    You can access the Westin Denver International Airport hotel by going up the escalator at the Transit center of Jeppesen Terminal. If you want a place to stay close to the airport, the hotel is within a short walking distance of the main terminal. The hotel offers both shuttle and public transport services.

  • How do I get from San Antonio International Airport (SAT) to downtown San Antonio?

    On arrival at SAT Airport, you can opt for public transportation from the airport to downtown San Antonio. The Super Shuttle is the only authorized shared-ride shuttle at the airport, which departs every 15min daily. You can also catch the VIA Metropolitan Transit buses which have a clearly marked stop between Terminals A and B at the Arrivals/Baggage level. You can also opt for taxi services which stop on the outer curbside of Terminal A.

  • What services does Denver International Airport (DEN) offer for people with reduced mobility?

    DEN is a partner with the Hidden Disabilities Sunflower organization which offers the Sunflower Lanyard Program. This is a subtle way of notifying the airport’s staff that you may need assistance due to a hidden disability. You can get the Sunflower Lanyard at the customer service desk or a DEN Ambassador at the center of each concourse. DEN has also made sure that all its services are wheelchair accessible, such as the elevators, restrooms, escalators, and TTY phones. DEN also utilizes the remote Aira way-finding agents to direct the blind or people with low vision.

  • What is the cheapest flight from Denver to San Antonio?

    In the last 5 days, the lowest price for a flight from Denver to San Antonio was $73 for a one-way ticket and $168 for a round-trip.

  • Do I need a passport to fly between Denver and San Antonio?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Denver to San Antonio?

    Denver and San Antonio are both served by 1 main airport. You will leave Denver from Denver Intl and will be arriving at San Antonio.

  • Which airlines offer Wi-Fi service onboard planes from Denver to San Antonio?

    JetBlue, and Delta offer inflight Wi-Fi service on the Denver to San Antonio flight route.

  • Which aircraft models fly most regularly from Denver to San Antonio?

    The Boeing 737-800 is the aircraft model that flies most regularly on the Denver to San Antonio flight route.

  • Which airline alliances offer flights from Denver to San Antonio?

    Star Alliance is the only airline alliance operating flights between Denver and San Antonio.

  • On which days can I fly direct from Denver to San Antonio?

    There are nonstop flights from Denver to San Antonio on a daily basis.

  • Which is the best airline for flights from Denver to San Antonio, Southwest or United Airlines?

    The two airlines most popular with KAYAK users for flights from Denver to San Antonio are Southwest and United Airlines. With an average price for the route of $331 and an overall rating of 7.9, Southwest is the most popular choice. United Airlines is also a great choice for the route, with an average price of $352 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Denver to San Antonio?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Denver to San Antonio.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to San Antonio?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Antonio from Denver is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Denver to San Antonio?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Antonio with an airline and back to Denver with another airline. Booking your flights between Denver and SAT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to San Antonio?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Antonio from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Denver to San Antonio

  • Looking for a cheap flight? 25% of our users found flights on this route for $215 or less one-way and $253 or less round-trip.
  • If you’re a mother traveling with a young toddler, Denver International Airport (DEN) offers tranquil nursing rooms for you to nurse or pump. You can find the nursing rooms at the Center of Jeppesen Terminal, Level 5, and inside the women's restroom,
  • On arrival at San Antonio International Airport (SAT), you can rent a car from different rental companies at the rental counters found at the facility of Consolidated Car Rentals. You can get to the rental car facility by taking the elevator or escalator to the Mezzanine Level in Terminal B and crossing the Sky Bridge.
  • If you are traveling with your furry travelers, you can find the pet relief areas at DEN for them to do their business before the flight. You can find the pet relief areas pre-security outside of Door 200 on the west side of Jeppesen Terminal, and post-security at the A, B, and C Gates near the respective U.S. Mail Drops.
  • If you need assistance at the San Antonio International Airport (SAT), you get free assistance from the trained Airport Ambassadors volunteers. The Airport Ambassadors visibly wear cowboy hats and offer information about the airport, hotels, ground transportation, and directions within the terminals.
  • For those who get nervous when flying, the Denver International Airport (DEN) offers the Canine Airport Therapy Squad (CATS) which is an animal therapy program. There are 80 dogs and one cat that you can hug pet, and take pictures with while at the airport. You can spot the DEN CATS anywhere in the airport, they have violet vests.

Prefer to fly direct from Denver to San Antonio?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Denver Intl to San Antonio.
Find which airlines fly direct from Denver Intl Airport to San Antonio Airport, which days they fly and book direct flights.

Direct departures

Denver Intl to San Antonio

Monday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Tuesday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Wednesday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Thursday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Friday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Saturday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Sunday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

See more direct flights

Direct returns

San Antonio to Denver Intl

Monday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Tuesday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Wednesday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Thursday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Friday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Saturday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Sunday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

See more direct flights

Reviews of the top 3 airlines serving from Denver to San Antonio

 
See real verified KAYAK customer reviews for airlines flying from Denver to San Antonio. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Denver to San Antonio? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
SouthwestOverall score based on 4250 reviews
8.1Boarding
7.0Food
8.0Comfort
7.5Entertainment
8.6Crew
Airline reviews

The flight was late. The crew was rude. There was no food. Cramped and uncomfortable. Nothing about this flight was good.

2.0 MediocreIrene, Jun 2026
DEN - SFO
Read more Southwest reviews

The flight was late. The crew was rude. There was no food. Cramped and uncomfortable. Nothing about this flight was good.

It was great. The gate staff were very helpful in Portland when my son forgot his rolling bag and had to go back to get it just in time to make it on the plane. We really appreciate that. Great job!

This leg was much better, but we did have to have a 3 hour lay o er after coming from a very exhausting hiccup with our flight from BNA to Den

I elected to pay for the upgrades and found very little difference

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

My flight from Denver to Minneapolis was excellent. My flight from Minneapolis to Denver was one of the worst I flights I have ever experienced. I had a window seat, the gentleman in the middle seat was morbidly obese and SW should have made him purchase two seats. His elbow dug into my arm most of the way even after I asked to please be careful. I was literally squashed between the him and the window with no wiggle room. The plane was full so it was not possible to ask for a different seat. I realize I should have complained to the flight attendant but I didn't feel anything could be done to rectify the situation. I fly SW often, I will continue to do so as this was my first negative experience.

Everything went smoothly and we even arrived a little bit early.

Connecting flight is on time and boarding was a breeze!

It seems as though the provisions are even less. Although SWA used to be an economy Airline, that isn't really the case anymore. I paid over $700. for a round trip to Denver and I could have flown just about any airline for the price. The drinks are now in a 6-ounce cup and with ice I'm sure a can would fill more than 2 cups. However, I am very proud of SWA for using paper rather than continuing to contribute to the millions of plastic cups being used each day. I've thought of this fr many years and am so glad to see it come to fruition, if not by only SWA so far.

It was good. I wish you had gluten free snacks for my husband.

Very easy ! Use the kiosk and bag drop and right to security within 10 min

This planes staff was top tier. Everything went great and had a great flight home.

Destroyed my suitcase. Tired of talking about it. Cancelling my unite mileage plus account.

New plane was lovely. Crew customer service is always lax but expected. Kraft on time and arrived safely.

Plane still had screens for watching movies. Good selection too.

No access to the Wi-Fi, noisy group of people made it difficult for me to hear through my earbuds. Snacks and drinks - limited service when your seat is at the back of the plane - people up front are always served first and the back gets whatever is left. Not pleased.

Didn't make it dir to delays - no support from United staff

Two hour flight delay, it was awful and loss of sleep.

My seat was broken. WiFi didn’t work. Gate crew at HOU were rude and condescending. Treated all the passengers badly. Bad experience, United.

Sitting in row 31, you could smell the bathroom during the entire flight. It was pretty disgusting.

I paid for the upgraded bundle. Was worth it! Great experience round trip!

It was awful everything about it terrible I will never ever ever ride it again

Crew was kind of grumpy and there was no beverage service at all. Sodas were $4. Disappointing.

Overall experience good. There was no food and seats were not terribly comfortable.

First time experience and though you'll pay for *everything* meaning bags, water/snacks, even a question with a service agent - - all in all, not a bad experience whatsoever.

I fly Frontier often and generally don't have any issues. For some reason, the Denver to Houston's George Bush Intercontinental (IAH) flight always needs to wait on the tarmac in Houston because a gate is not available after landing. I've been stuck for as little as 15 minutes and as much as a little over an hour. I know only fly the Frontier Denver to IAH route when there is not an available flight to Houston Hobby (HOU).

Everything was good, 20/30 minutes late waiting on a crew member. It’s hard to keep employees. Or serious employees I know. I remember one flight from Houston of Frontiers was almost 18 hours late. And another 4 hours late very poor. But I would rather be late and safe than the on the news. Thank you.

I like the easy check-in and boarding process. I love the non stop flight

For a busy travel season, everything was clearly marked, correct, and smooth. My favorite travel description is “UNEVENTFUL,” and this trip met the mark!

Flight had mayor delay. The onboarding took forever and was poorly conducted. AC was not in it was very warm in the plane.

Everything you need to know for your flight from Denver to San Antonio

Other airlines flying from Denver to San Antonio

Flights from the other most popular airlines that fly from Denver to San Antonio according to KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.