Frontier AirlinesDepart16:25
Sat, Dec 19DEN → SAT
2h 10m · Direct
$82one way, per person
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- Cheapest fare
- $82
- Cheapest month
- December
- Direct flights
- Yes
- Flight time
- 2h 10m
Frontier Airlines · Sat, Dec 19
from $82
Frontier Airlines
1,290 km
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Cheapest month to fly from Denver to San Antonio
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in December 2026
The lowest fares we've seen for each day, cheapest first.
See every date in December 2026 →Plan the rest of your trip to San Antonio
Where to stay, what to do and getting around, from our travel partners.
About flights from Denver to San Antonio
Denver (DEN) and San Antonio (SAT) are about 1,290 km apart. Direct flights take around 2h 10m, and recent direct fares were with Frontier Airlines. Over the next few months, one-way fares start from $82, and December 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from Denver to San Antonio?
The cheapest one-way fare we've seen recently is $82 with Frontier Airlines, departing Saturday, December 19, 2026. Over the coming months, the lowest fare in each month ranges from $82 to $135.
What is the cheapest month to fly from Denver to San Antonio?
December 2026 currently has the lowest fares, from $82 one way.
Are there direct flights from Denver to San Antonio?
Yes. Recent direct fares were with Frontier Airlines.
How long is the flight from Denver to San Antonio?
A direct flight takes about 2h 10m. Denver and San Antonio are around 1,290 km apart.
Which airlines fly from Denver to San Antonio?
Recent fares on this route were with Frontier Airlines.
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