Cheap flights from San Antonio to Denver from $82

The cheapest month to fly to Denver from San Antonio is in February. Flight prices, which tend to average around $188, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in February, then you should wait until January to fly from San Antonio, when ticket prices are also cheap, with an average price of $189.

The cheapest day to depart on your flight to Denver is on a Thursday when prices can be found for as low as $327. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Sunday, with ticket prices averaging around $422.

The cheapest time of day to fly to Denver is in the evening when flights can be purchased for as low as $266. Flights at noon are often more expensive with an average ticket price of $539.

Fly from San Antonio to Denver Intl for the best San Antonio - Denver Intl flight prices

You are more likely to see cheaper flights to Denver from San Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $242 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from San Antonio for as low as $184 on momondo.

There are 4 cabin classes available to choose from on San Antonio to Denver flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Frontier, Southwest, and United Airlines are the most popular carriers operating from San Antonio to Denver Intl

Frontier, United Airlines and Southwest are the top three most popular airlines that fly to Denver from San Antonio according to our data. Frontier is the first choice among our users, with 57% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 5 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

As of October 2026, 13 flights take off from San Antonio and land in Denver each day. The most common flight departure time for this route is 1:00PM, with 41% of daily flights taking off in the afternoon.

94 flights are operational weekly from San Antonio to Denver as of October 2026. The most popular departure day for this route is Mon, with 17% of flights per week taking off on this day.