SAT to DEN flight delays & on-time performance
Nonstop flights from San Antonio International Airport to Denver International Airport · 794 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SAT or DEN right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from San Antonio (SAT) to Denver (DEN) arrived on time 82% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.4% were cancelled, and 6% arrived an hour or more late.
- United Airlines was the most punctual airline here (83% on time); Frontier Airlines was the least (81%).
- Departures scheduled around 5am did best (97% on time); around 6pm did worst (64%).
- Sunday was the most reliable day to fly (84% on time) and Monday the least (80%).
- The largest source of delay minutes was late-arriving aircraft (40%).
Which airline is most on time from SAT to DEN?
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 |
|---|---|---|---|---|---|
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 89% | 0.0% | 19 min | 5.6% | 18 |
| United Airlines | 83% | 0.7% | 15 min | 7.5% | 1,205 |
| Southwest Airlines | 81% | 0.2% | 11 min | 5.1% | 1,434 |
| Frontier Airlines | 81% | 0.5% | 18 min | 7.4% | 383 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am97%348 flights
- 6am93%199 flights
- 8am85%344 flights
- 9am87%120 flights
- 10am92%161 flights
- 11am85%105 flights
- 12pm84%165 flights
- 1pm84%416 flights
- 2pm78%85 flights
- 3pm80%95 flights
- 4pm73%418 flights
- 5pm67%43 flights
- 6pm64%241 flights
- 7pm69%148 flights
- 8pm74%134 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday80%0.0% cancelled
- Tuesday82%0.5% cancelled
- Wednesday81%0.0% cancelled
- Thursday83%0.9% cancelled
- Friday81%0.6% cancelled
- Saturday82%0.5% cancelled
- Sunday84%0.5% 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 aircraft40%
- Airline (crew, maintenance, cleaning, fueling)30%
- Air traffic control & airport congestion28%
- Extreme weather2%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)54%
- Extreme weather23%
- Air traffic control & airport congestion23%
- Security0%
SAT to DEN: common questions
- How often are SAT to DEN flights on time?
- 82% 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 San Antonio to Denver cancelled?
- 0.4% of scheduled flights were cancelled (13 of 3,040).
- How long are typical delays?
- Across all flights the average arrival delay was 13 min (early arrivals count as zero). Flights that were late arrived 68 min behind schedule on average, and 6.3% of flights were an hour or more late.
- How long is taxi time at SAT?
- Flights on this route spent 12 min taxiing from the gate to takeoff on average.
Related routes
Return trip: DEN to SAT — 77% on time
More flights from San Antonio
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SAT → DEN, nonstop flights by US airlines that report to the DOT. How we calculate this.