Cheap Flights from Denver to San Antonio International

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Flight deals from Denver to San Antonio International

Looking for a cheap last-minute deal or the best return flight from Denver to San Antonio International? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Denver to San Antonio International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Denver to San Antonio International flights are currently cheapest in April.

Direct flights from Denver to San Antonio International

Denver to San Antonio International: Alternative routes

Compare routes from Denver to San Antonio below. You may find an airport to fly into that's cheaper, faster, or easier than San Antonio International.

Denver to San Antonio: Flight information

The things to know before you go.
Cheapest flight foundR 669
Cheapest month to flyApril
Average flight time2 hrs, 14 mins
Most popular airlineSouthwest Airlines
Average flights per week142

Finding cheap flights from Denver to San Antonio International: Frequently asked questions

The best price we found for a return flight from Denver to San Antonio International is R 892. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
2 hours and 14 minutes is the average flight time from Denver to San Antonio International.
Southwest Airlines, United and Air Canada fly direct from Denver to San Antonio International.
As of March 2026, there are 142 flights per week flying from Denver to San Antonio International.
The cheapest month to fly from Denver to San Antonio International is usually May.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Denver to San Antonio International Airport on Wednesday, 13 May 2026.
Yes – the average flight time is 2 hours and 14 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Antonio International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Antonio is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to San Antonio International is Frontier Airlines .

Flying from Denver to San Antonio International Airport (SAT): What you need to know

  • Start your adventure at Denver International Airport (DEN), the main airport in Denver. Search for flights from Denver to San Antonio International Airport (SAT) that jet out of this terminal.

  • Expect to be in the air for 2 hours 10 minutes. That's the average duration of a direct Denver to San Antonio International Airport flight.

  • San Antonio is one hour ahead of Denver. San Antonio International Airport is located in San Antonio, which is in the UTC-5 timezone.

  • With 44 direct weekly flights between the two airports, Denver International Airport (DEN) to San Antonio International Airport (SAT) is the busiest route. Southwest Airlines operates the earliest flight at 5:55am. If you prefer to get more out of your day before flying, the latest departure from DEN to SAT is with Southwest Airlines at 9:45pm.

  • For stress-free travel, arrive at the airport two hours ahead of international flights and one hour before domestic departures. This way, you can comfortably catch your flight from Denver to SAT.

  • With more people on the move during high season, it's smart to be at your terminal even earlier. Two hours for domestic flights and up to four for international trips will allow for additional wait times.

Airports in Denver

Denver International Airport (DEN)

  • You can hop on a direct flight from Denver to San Antonio International Airport (SAT) leaving from Denver International Airport (DEN).

  • At DEN, you can choose from various carriers operating direct flights from Denver to San Antonio International Airport, including:

  • The majority of travellers choose to book seats with United Airlines between DEN and SAT.

  • Among carriers operating on this route, United Airlines has the best track record for timely arrivals.

  • Located around 40 kilometres from central Denver, DEN can be reached in about 35 minutes by car (depending on traffic). The journey by public transport takes roughly 1 hour 30 minutes.

  • Booking a hotel room for the night can take the stress out of reaching the airport on time. If you're searching for a place to stay before your flight from Denver to San Antonio International Airport, check out Baymont by Wyndham Denver International Airport. It's an easy drive from Denver International Airport.

  • Denver International Airport has an excellent on-time record, making delays less likely. Departures from DEN arrive at their destination as scheduled 80.23% of the time.

  • DEN is located at 8500 Pena Boulevard.

About San Antonio International Airport (SAT)

Getting from San Antonio International Airport (SAT) to central San Antonio

  • San Antonio International Airport is about 13 kilometres from central San Antonio. The time it takes to get to the centre in a cab or car hire will depend on the time of day. Do some research before your trip.

  • If you're taking public transport, expect a journey time of around 1 hour 30 minutes.

How to find the cheapest flights from Denver to San Antonio International Airport (SAT)

  • R 669 is the best price for a one-way ticket from Denver to San Antonio International Airport. A return flight starts from R 892. These prices may change based on availability and demand.

  • Booking ahead of time is often the key to scoring a cheap flight from Denver to SAT. Airlines adjust prices based on demand, so the closer your departure date, the more it could cost you.

  • The 'Whole month' tool will show you the cheapest Denver to San Antonio International Airport tickets across every month. It's a great way to find a bargain if your plans are flexible.

  • Snapping up a cheap plane ticket from Denver to SAT is a breeze with Price Alerts. Simply set up one of these automatic alerts and we'll notify you as soon as a lower fare pops up.

  • Hunt for savings on a flight from Denver to San Antonio International Airport with the help of the filters. Pick your preferred arrival and departure times, airlines and number of stops. You can also sort your results by 'Cheapest,' 'Best' or 'Fastest.'

The best time to fly from Denver to San Antonio International Airport (SAT)

  • It's time to figure out your travel dates for your flight from Denver to San Antonio International Airport (SAT). July is the busiest month to travel to San Antonio. If crowds aren't your thing, go in April.

  • Lock in a Denver to SAT plane ticket departing in August if you want to experience the city during its warmest month. Expect temperatures in San Antonio to range from 23ºC (73ºF) to 40ºC (104ºF).

  • Search for cheap tickets from Denver to San Antonio International Airport in January if you'd rather travel when it's cooler. Temperatures are at their lowest then, ranging between 3ºC (37ºF) and 20ºC (68ºF).

More about San Antonio

  • When it comes to searching for somewhere to rest your head, you'll find the best stays in San Antonio right here. Explore these options as soon as you've locked in your flight from Denver to San Antonio International Airport:

  • Every great holiday has to include some sightseeing. The San Antonio River Walk, San Antonio River walk and Alamo Plaza are attractions you won't want to skip in San Antonio.

Explore more of the United States

  • Austin is just one of the many cities in the United States waiting to be explored once you've seen the sights of San Antonio. Around 105 kilometres away to the north-east, its best attractions include Texas State Capitol, Central Park and Austin Museum of Art, Downtown.

  • Around 225 kilometres south-east of San Antonio, Corpus Christi is another essential stop in the United States. Start your sightseeing at Texas State Aquarium, Bayfront Park and Corpus Christi Cathedral.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.