DEN to SAT flight delays & on-time performance
Nonstop flights from Denver International Airport to San Antonio International Airport · 794 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at DEN or SAT right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Denver (DEN) to San Antonio (SAT) arrived on time 77% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.3% were cancelled, and 7% arrived an hour or more late.
- United Airlines was the most punctual airline here (83% on time); Southwest Airlines was the least (71%).
- Departures scheduled around 8am did best (91% on time); around 7pm did worst (52%).
- Wednesday was the most reliable day to fly (84% on time) and Friday the least (72%).
- The largest source of delay minutes was late-arriving aircraft (56%).
Which airline is most on time from DEN to SAT?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 83% | 0.2% | 13 min | 6.4% | 1,203 |
| Frontier Airlines | 81% | 0.3% | 12 min | 5.5% | 385 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 79% | 0.0% | 41 min | 5.3% | 19 |
| Southwest Airlines | 71% | 0.3% | 16 min | 8.2% | 1,436 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am88%116 flights
- 8am91%190 flights
- 9am90%424 flights
- 10am84%105 flights
- 11am77%98 flights
- 12pm81%96 flights
- 1pm86%510 flights
- 2pm67%70 flights
- 3pm76%226 flights
- 4pm68%197 flights
- 5pm68%408 flights
- 6pm73%120 flights
- 7pm52%159 flights
- 8pm59%188 flights
- 9pm73%90 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday77%0.2% cancelled
- Tuesday78%0.0% cancelled
- Wednesday84%0.5% cancelled
- Thursday75%0.6% cancelled
- Friday72%0.2% cancelled
- Saturday81%0.2% cancelled
- Sunday76%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft56%
- Airline (crew, maintenance, cleaning, fueling)31%
- Air traffic control & airport congestion11%
- Extreme weather2%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)63%
- Extreme weather25%
- Air traffic control & airport congestion13%
- Security0%
DEN to SAT: common questions
- How often are DEN to SAT flights on time?
- 77% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Denver to San Antonio cancelled?
- 0.3% of scheduled flights were cancelled (8 of 3,043).
- How long are typical delays?
- Across all flights the average arrival delay was 14 min (early arrivals count as zero). Flights that were late arrived 59 min behind schedule on average, and 7.1% of flights were an hour or more late.
- How long is taxi time at DEN?
- Flights on this route spent 18 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SAT to DEN — 82% on time
More flights from Denver
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: DEN → SAT, nonstop flights by US airlines that report to the DOT. How we calculate this.