SAT - DEN

$63 Find Cheap Flights from San Antonio to Denver - 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 San Antonio to Denver departing on 7/20. 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.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Denver

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Antonio to Denver, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Antonio to Denver, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$159
Typical prices: $147-$325
Frontier
Thu 8/13Mon 8/17
SAT - DEN • Non-stop
Cheapest one-way
$63
Typical prices: $143-$211
Frontier
Mon 7/20
SAT - DEN • 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 choice; Premium Bundle adds legroom.
Southwest includes a free carry-on; United Economy Plus offers up to 6 extra inches.
Expert advice
Expert advice
Expert advice
Expert advice
Nonstop flights
You can fly direct with Frontier, Southwest and United Airlines. Average duration is 2h 18m
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 32% compared to booking last minute.
Insights
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Insights
When to travel
Cheapest • 18% price drop
Most popular
Good to know
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We hope you love your trip to Denver!
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Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Antonio to Denver 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 San Antonio to Denver

Thu, Aug 13 - Mon, Aug 17
Frontier Logo
7:49 pm - 9:24 pm
SAT
-
DEN
2h 35mnonstop
Frontier Logo
3:40 pm - 6:54 pm
DEN
-
SAT
2h 14mnonstop
$159Frontier
Wed, Jul 15 - Sat, Jul 18
Frontier Logo
7:39 pm - 9:14 pm
SAT
-
DEN
2h 35mnonstop
Frontier Logo
3:30 pm - 6:44 pm
DEN
-
SAT
2h 14mnonstop
$161Frontier
Thu, Aug 13 - Sun, Aug 16
Frontier Logo
7:49 pm - 9:24 pm
SAT
-
DEN
2h 35mnonstop
Frontier Logo
3:40 pm - 6:54 pm
DEN
-
SAT
2h 14mnonstop
$162Frontier
Wed, Aug 5 - Mon, Aug 10
Frontier Logo
7:49 pm - 9:24 pm
SAT
-
DEN
2h 35mnonstop
Frontier Logo
3:40 pm - 6:54 pm
DEN
-
SAT
2h 14mnonstop
$164Frontier
Mon, Jul 20 - Mon, Jul 27
Frontier Logo
7:39 pm - 9:14 pm
SAT
-
DEN
2h 35mnonstop
Frontier Logo
3:30 pm - 6:44 pm
DEN
-
SAT
2h 14mnonstop
$165Frontier
Thu, Aug 13 - Sun, Aug 16
Frontier Logo
7:49 pm - 9:24 pm
SAT
-
DEN
2h 35mnonstop
Frontier Logo
3:40 pm - 6:54 pm
DEN
-
SAT
2h 14mnonstop
$169Frontier
Mon, Sep 21 - Sat, Sep 26
Frontier Logo
11:08 am - 12:33 pm
SAT
-
DEN
2h 25mnonstop
Frontier Logo
7:00 am - 10:12 am
DEN
-
SAT
2h 12mnonstop
$170Frontier
Sat, Sep 19 - Mon, Sep 21
Frontier Logo
11:08 am - 12:33 pm
SAT
-
DEN
2h 25mnonstop
Frontier Logo
7:00 am - 10:12 am
DEN
-
SAT
2h 12mnonstop
$171Frontier
Thu, Sep 10 - Mon, Sep 14
Frontier Logo
7:49 pm - 9:17 pm
SAT
-
DEN
2h 28mnonstop
Frontier Logo
7:00 am - 10:12 am
DEN
-
SAT
2h 12mnonstop
$172Frontier
Thu, Aug 27 - Sun, Aug 30
Frontier Logo
7:49 pm - 9:24 pm
SAT
-
DEN
2h 35mnonstop
Frontier Logo
3:40 pm - 6:54 pm
DEN
-
SAT
2h 14mnonstop
$174Frontier
Booking Insights

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

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

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

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

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

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

For San Antonio to Denver, Thursday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Denver back to San Antonio, the best deals are generally found on Friday, with Sunday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Antonio to Denver, 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 San Antonio to Denver is February, where tickets cost $182 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $323 and $280 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Antonio to Denver, 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 San Antonio to Denver, you should book around 2 weeks before departure, which saves you about 32% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Expert advice

Expert advice for your flight from San Antonio to Denver

 
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$63
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from San Antonio to Denver

When to book flights from San Antonio to Denver

Are your dates flexible? Find out the best times to travel from San Antonio to Denver 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 San Antonio to Denver

  • How can I get from the Denver International Airport (DEN) into the city?

    Denver International Airport (DEN) is about 35min from downtown. The city has a light rail system that goes from the airport to Denver Union Station, which is in the heart of the city. To catch the train, you can do so at the rail station which is close to the airport hotel.

  • What kind of food can I purchase at the San Antonio International Airport (SAT)?

    Before boarding your plane, you can enjoy dining at a variety of restaurants. If you want something quick, there is a pretzel shop and a submarine sandwich shop in the terminal. If you're looking to sit down and dine, there is a pizzeria, a Mexican eatery, and a Mediterranean cafe.

  • How do I rent a car at the Denver International Airport (DEN)?

    There are several car rental agencies with offices at this Colorado airport. Therefore, you'll have your pick of companies to rent from including Hertz, National, and Thrifty. To get to the car rental offices, you'll catch a shuttle from outside of baggage claim. Simply look for the shuttle with the name of your car rental company. When you return the car, you'll drop it off and ride the shuttle back to the airport to catch your flight.

  • What amenities and services are there for passengers at the Denver International Airport (DEN)?

    There is a spa at the airport in the Mezzanine where you can get a massage or another spa service. You can enjoy a quick bite at the pretzel or coffee shop, or a sit-down meal at the steakhouse or sports bar.

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

    In the last 5 days, the lowest price for a flight from San Antonio to Denver was $63 for a one-way ticket and $159 for a round-trip.

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

    No

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

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

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

    The Airbus A320-100/200 is the aircraft model that flies most regularly on the San Antonio to Denver flight route.

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

    oneworld, and Star Alliance are the airline alliances operating flights between San Antonio and Denver, with oneworld being the most commonly used for this route.

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

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

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

    The two airlines most popular with KAYAK users for flights from San Antonio to Denver are Southwest and United Airlines. With an average price for the route of $326 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 $332 and an overall rating of 7.4.

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

    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 San Antonio to Denver.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from San Antonio 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 San Antonio to Denver?

    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 Denver with an airline and back to San Antonio with another airline. Booking your flights between San Antonio and DEN 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 San Antonio to Denver?

    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 Denver from San Antonio 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 San Antonio to Denver

  • Looking for a cheap flight? 25% of our users found flights on this route for $188 or less one-way and $300 or less round-trip.
  • There is a Westin at the Denver International Airport (DEN). This is convenient if your flight gets into Denver late. The Westin Denver International Airport has its own restaurant and bar, fitness center, and indoor pool. It is located outside of Jeppesen Terminal.
  • When catching your flight to Denver, your driver can drop you off at the departure level in front of your terminal at the San Antonio International Airport (SAT). However, you will have to get out of and unload your baggage quickly because parking is not allowed here.
  • There are several ATMs at the Denver International Airport (DEN) in the Jeppesen Terminal. In Terminal 6, there is also a credit union where you can conduct financial business.
  • If you'd prefer to drive yourself to the San Antonio International Airport (SAT), long-term parking is available in the airport's garage. This is your best option during the winter months. However, if you want to save money, there are a couple of economy lots near the cell phone lot.
  • The San Antonio Airport is a medium-sized airport with a variety of services and amenities. It is less than a 10min drive from downtown. The airport has two terminals and twenty-four gates.
  • When you land at the Denver International Airport (DEN), head to the information desk to learn about local tourist attractions, hotels, transportation into the city, and more. The information desk is located in the Jeppesen Terminal, Level 5.

Prefer to fly direct from San Antonio to Denver?

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

Direct departures

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

Direct returns

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

Reviews of the top 4 airlines serving from San Antonio to Denver

 
See real verified KAYAK customer reviews for airlines flying from San Antonio to Denver. 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 San Antonio to Denver? 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 4242 reviews
7.5Entertainment
8.1Boarding
8.0Comfort
7.0Food
8.6Crew
Airline reviews

Crew was rude, flight was late, wifi didn't work, no food, basically nothing about this flight was good.

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

Crew was rude, flight was late, wifi didn't work, no food, basically nothing about this flight was good.

Flight was constantly delayed with significant changes in time, it was supposed to get to Colorado Springs at 8:30 PM but it got there after midnight.

Airline is not very senior friendly. Flights are late, forcing us to run to the connecting flight. Food is awful. Wish they would go back to pretzels and peanuts. During flight, pressurization isn’t quite right and all of our ears get plugged. Everything is nickel and dime, charging for boarding, seat selection and legroom. While a screen at the desk in the gate area says check your roll on bag now for free due to space limitation, the employee at the desk will not check the bag without a $100 fee. Insane.

I don't know why flying out of Sarasota requires two plane changes.

First time I've had to use the disabled accommodations. And I could not have had a better experience with Southwest, i was having trouble getting from one terminal to another due to my heart failure. And the next thing I know a Southwest agent had made sure. I had a wheelchair at all my flights. Can't thank them enough.

We waited in the airplane for over 45 min for a southwest employee to make the flight. This cause over half the plane to miss their connecting flight in Denver. When we confronted the desk upon arrival, they told us the only flight they had was the next day leaving at 8:50 pm!!! Or they offered to get us to Burbank or LA, but after that we were on our own to get back to Santa Barbara. I paid for a flight from sba to bna bna to sba. My re entry into mom mode has been 💯 rough because of southwest mistake with my flight. And now I’m leaving to Reno tomorrow for a vballl tournament and just discovered that my leg in Vegas has me and my 3 kids on a stand by flight even though I had booked these ticket last year November!! Do better southwest!

The new seat assignment thing is wierd. If you don’t pay for a seat they always assign you a middle seat regardless of how many people are on the flight. Idk… the new company that bought Southwest is trying to make it more profitable, but I’m just not seeing it. The flight attendants aren’t having as much fun anymore. It just feels like the airline is slowly dying. IMO. We shall see if Southwest is the next Toy’s R Us.

The Air hostess were very rude on my flight from Houston to Austin . Their regular communication itself felt a they are shouting at people.

Plane was late. Zero service for 2+ hour flight and it was not that bumpy.

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

Checking bag at terminal was horrible. No agents to check us in and only 1 kiosk working. Boarding went ok. Crew onboard was very scattered rained. Missed our row while serving and then didn’t see them hardly again.

The entertainment is a bit limited, it would be better if they added some games to play besides the movies and tv shows. But the seats are comfortable and the crew is polite

Food was great. Staff was phenomenal. Seats were a bit hard and could use a lot more entertainment options as far as movies to choose from. WiFi was good. Overall great trip.

Read the fine print. This was my flight home. I booked my flight for the quickest way home. Had a carry-on and a personal item. Same as my outbound flight. Apparently I needed to pre-pay extra for my carry-on. When I checked in, I was told that I had to check it. I said I’ll pay for it, and was told that this wasn’t an option anymore. They said I still had to pay $50 to check my carry-on. I told them I’ll pay whatever to just carry it in as intended. I was not allowed, so eventually I paid $50 to check my carry-on under a plane that was half full, with overhead compartments that were even less full. My white carry-on suitcase was practically destroyed getting from Idaho falls to Denver to Orange County. The low price air fair was a bait and switch. Got me to the gate, made me pay extra, then didn’t even allow me to pay for a carry on. Not to mention that I paid the $8 for WiFi that didn’t work. All to get my suitcase destroyed. I don’t think I’m going to even keep my Untied mileage plus membership and card. Apparently, membership does not have its privileges for this one.

I flew from Santa Fe to Denver to catch a flight to London and the transfer of my luggage on arrival at Denver to the London flight worked perfectly. The crew on the ground and on board for the London flight were so friendly and efficient.

Late- that’s what United does best. Missed my connection, rebooked to a flight 17 hours later and had to spend $500 on a hotel. What did I get? A $15 meal voucher. What can you get in an airport for $15. I hate United so much.

It was good overall except from Omaha to Denver when flight a was a repeatedly delayed apparently due to some issue at Denver. Communications could have been handled better. I had to board then deboard with luggage and board again

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

They told us yesterday APR21st that they were cleaning the plane and we got delayed. After that they said they didn't had any crew for the flight so they cancelled the flight till next day.

The flight crew on this leg of my trip was very friendly and pleasant. Every one of them was humorous, as well as helpful and accommodating. This group was BY FAR the best crew I’ve flown with. They deserve kudos.

This flight moved Gates several times in a short time period, from B to C, which required a substantial walk or rail ride. Then the flight was delayed more than 2 hours and the food was subpar compared to other flights.

Flight cancelled. Twice. And no communication. No gate agent. Went past boarding time and had to go and see email from AA. Airport communication was bad

I love the e fact that the staff communicated swiftly when my flight was delayed and gate number changed

Delayed and horrible communication and sat on flight for an hour before taking off

Plane temperature was so hot that everyone on the plane was sweating. Departure gates changed 3 times in the hour before the flight. Internet service was so poor in the terminal that updates weren't always being received.

Delayed flight due to maintenance and I have had multiple delayed flights due to maintenance in the last month plus

technology worked well and everything ran smoothly. The seats are quite cramped so please don't try to re-engineer the cabin to squeeze more bodies on board.

Delayed flight more than I hour. When boarding we spent some additional time on the plane before takeoff ....

Flight was delayed due to connecting passengers. Lack of snack options bad. Sitting in Aisle, last cart run pulled the cart directly into my knee. Rude awakening.

Flight was delayed by 6 hours... the level of incompetence was truly astounding. I won't be flying American Airlines again. I don't care if AA is direct and there is a layover with another airline, I'll take the layover.

There weren't enough employees at check in took awhile to get bags checked. There wasn't a wheel chair for me, I was sent to someone who turns out to work for a different airline, if My flight hadn't been delayed I probably would have missed my flight as it was, by the time I arrived at my gate, they started boarding in about 15 minutes. I don't know who took me to my gate, definitely was not the normal people who take passengers to the gate. I'm guessing she may have been in a management position. I wish I knew her name, she went beyond to help me. With that said everyone was kind, and were doing the best they could. So, I choose to say it was an Adventure, stressful start, but good. In the end went well. The situation was not only difficult for passengers but the employee's.

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

It was an early flight and most people napped/slept and the crew let us which was nice.

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

My flight was originally from SAT to MCO connecting from MCO to ORD. We got diverted to ATL and than Frontier staff there was sooo un helpful first they said they couldn’t give us any accommodation since our flight first got delayed that cancelled and now it’s 221am and I am still in ATL since they said they need to create a new flight my final destination is ORD and I have been delayed twice and cancelled. With no real help the frontier app didn’t work no email updates over all such a horrible experience

Gate not determined until I got to the airport - hard to plan the trip to the airport.

Very well recently! Frontier is improving and less harrassing customer on luggages! Positive!

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

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

Other airlines flying from San Antonio to Denver

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