To San Antonio

Cheap Flights from Denver to San Antonio

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Deals from

Denver

RatePunk searches hundreds of travel sites at once for deals on flights to San Antonio

Prices updated 24 days ago

486,190 searches this week

171 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated May 29, 2026.)

Today’s best flight deals from Denver to San Antonio

Explore current cheapest deals departing from Denver to San Antonio

Round trip

Sort by: Cheapest

July 20 - August 4

Cheapest

DEN - San Antonio

$138

$127

Round trip

July 14 - August 4

Cheapest

Earliest

DEN - San Antonio

$139

$127

Round trip

July 14 - July 20

Cheapest

Earliest

DEN - San Antonio

$157

$127

Round trip

July 14 - August 11

Earliest

DEN - San Antonio

$138

$131

Round trip

July 20 - August 11

DEN - San Antonio

$139

$131

Round trip

August 4 - August 11

Best

DEN - San Antonio

$187

$131

Round trip

August 4 - August 17

DEN - San Antonio

$165

$132

Round trip

July 20 - August 17

DEN - San Antonio

$139

$132

Round trip

July 21 - August 4

DEN - San Antonio

$139

$132

Round trip

August 4 - September 1

DEN - San Antonio

$156

$132

Round trip

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Route Intelligence — 486,190 Searches this Week

Insights for flights from Denver to San Antonio

Right now, 8% of recent fares for cheap flights from Denver to San Antonio are classified as a good price. Fares for this route typically range from $80–$172, with a median of $124. Currently, prices are near the typical level for this route. New deals appear almost daily, offering frequent opportunities for travelers.

For travelers wondering when is the cheapest time to fly from Denver to San Antonio, May stands out as the most affordable month, with a median fare of just $80. April also offers competitive prices, with a median fare of $100. Following these, August presents another option with a median fare of $128.

A typical journey from Denver to San Antonio takes about 4h 38m, including connections. This route is primarily served by direct flights from Denver to San Antonio, as 87.4% of recent fares are non-stop. For the remaining itineraries that do include connections, most involve one stopover.

The distance between Denver and San Antonio is approximately 1280 kilometers. This classifies the route as a short-haul journey, indicating a relatively quick travel time between the two cities.

How much is a round trip from Denver to San Antonio

Regular price: $111 - $284

Prices for flights from Denver to San Antonio are currently within the regular range.

The regular price range for flights from Denver to San Antonio is between $111 and $284. The current lowest deal is $127 with Frontier Airlines, for travel from Jul 20-Aug 4.

now $127

Low $111

High $284

The cheapest time to fly from Denver to San Antonio

The cheapest month to fly from Denver to San Antonio is May, with a median price of $80. The most expensive month is January, with a median price of $517. Prices are generally lower from April to November.

May

Cheapest

Flights from $80

January

Most Expensive

Flights from $517

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from Denver to San Antonio

Frontier Airlines

Last-minute flights going from Denver to San Antonio

Mon, Jul 6

⌛ Last-Minute

DEN - San Antonio

Denver (DEN) - San Antonio (SAT)

Frontier Airlines

$271

$269

One-way

Tue, Jul 7

⌛ Last-Minute

DEN - San Antonio

Denver (DEN) - San Antonio (SAT)

Frontier Airlines

$144

$141

One-way

Tue, Jul 7

⌛ Last-Minute

DEN - San Antonio

Denver (DEN) - San Antonio (SAT)

Frontier Airlines

$159

$141

One-way

Tue, Jul 7

⌛ Last-Minute

DEN - San Antonio

Denver (DEN) - San Antonio (SAT)

Frontier Airlines

$139

$141

One-way

Tue, Jul 7

⌛ Last-Minute

DEN - San Antonio

Denver (DEN) - San Antonio (SAT)

Frontier Airlines

$169

$196

One-way

Tue, Jul 7

⌛ Last-Minute

DEN - San Antonio

Denver (DEN) - San Antonio (SAT)

Frontier Airlines

$270

$207

One-way

Biggest price drops on these dates for flights from Denver to San Antonio

1 night

Aug 4 - Aug 5

$201 → $137

32%

2 nights

Jul 7 - Jul 9

$270 → $207

23%

1 night

Aug 17 - Aug 18

$201 → $142

29%

2 nights

Aug 17 - Aug 19

$200 → $142

29%

Popular Airports to fly from Denver to San Antonio

Denver - San Antonio route insights

💸 Price insights

Recent fares are near the typical level.

Recent fares from Denver to San Antonio are near the typical level of $124.

📅 Best time to fly

Fly in May for the best prices.

Historically, May is the cheapest month to fly, with a median price of $80.

⏱️ Flight duration

Direct flights take 4h 38m.

The typical flight duration from Denver to San Antonio is 4 hours and 38 minutes.

✈️ Airlines & availability

87.4% of deals are direct.

Most flights on this route are direct, with 87.4% of recent deals being non-stop.

🏆 Airline highlight

Frontier Airlines offers direct flights.

Frontier Airlines provides direct flights from Denver to San Antonio, with recent deals available.

🎯 Booking tip

Deals appear frequently.

Deals for flights from Denver to San Antonio are frequent, appearing over once a day.

Denver main airports to depart from

Denver International (DEN)

Cheapest

Denver International Airport is a great choice for flights from Denver to San Antonio.

📍 ~40 km from city center (reachable by car or train)

💸 Flights from ~$127

San Antonio main airports to arrive at

San Antonio International (SAT)

Cheapest

San Antonio International Airport is a convenient arrival point for flights from Denver to San Antonio.

📍 ~15 km from San Antonio city center (reachable by car)

💸 Flights from ~$127

Airports nearby San Antonio used as alternative

Austin–Bergstrom International (AUS)

Cheapest

Consider Austin–Bergstrom International for significantly more direct flight options, despite potential heavy traffic on I-35.

📍 ~120 km from San Antonio (reachable by car)

💸 Flights from ~$81

Corpus Christi International (CRP)

Corpus Christi International offers additional options, especially for travelers heading towards the Gulf Coast.

📍 ~200 km from San Antonio (reachable by car)

💸 Flights from ~$218

Laredo International (LRD)

Laredo International provides reliable domestic service, useful for travelers heading south via I-35.

📍 ~240 km from San Antonio (reachable by car)

💸 Flights from ~$263

Killeen–Fort Hood Regional (GRK)

Killeen–Fort Hood Regional is an alternative for travelers on the north side of San Antonio.

📍 ~170 km from San Antonio (reachable by car)

💸 Flights from ~$367

Victoria Regional (VCT)

Victoria Regional is an option if you are looking for a geographically closer regional airport.

📍 ~190 km from San Antonio (reachable by car)

💸 Flights from ~$384

Business & First Class Flight Deals to San Antonio

San Antonio, United States

37% AI deal score

$12,175

From DEN

Elite

Jun 26

San Antonio, United States

37% AI deal score

$12,175

Frequently Asked Questions About Flights to San Antonio

Historically, the optimal booking window for flights from Denver to San Antonio is typically between 28 and 59 days prior to departure. During this period, the average price was around $112. Booking within 7-13 days of departure saw average prices rise to $215, while last-minute bookings (0-6 days out) were significantly higher, averaging $598. Planning ahead by at least four weeks can lead to considerable savings on this route.

Across the trailing quarter, a good price for a flight from Denver to San Antonio was considered to be $80 or less. The median price for this route was $124. Fares at the 75th percentile were around $172, indicating that prices can vary significantly. Travelers aiming for a budget-friendly trip should target fares at or below the $80 mark.

Historically, May has been the cheapest month to fly from Denver to San Antonio, with a median price of $80. April also offered competitive fares, with a median of $100. While August had a median price of $128, the annual median price for this route was $124. Travelers looking for the lowest fares should consider flying in May.

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