Route Reliability
San Antonio → Denver
SAT–DEN · 794 miles · San Antonio International Airport to Denver International Airport
- 82%
- Arrive within 15 minutes
- 6 min
- Average arrival delay
- 0.5%
- Cancelled
- 3,013
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Southwest Airlines82%1,433 flights
- 2.United Airlines82%1,225 flights
- 3.Frontier Airlines79%355 flights
What the data says
Morning flights do better here.
SAT–DEN flights departing between 3–6 AM arrived on time 96% of the time, versus 65% between 6–9 PM.
Monday comes out ahead.
A small edge: 84% on time on Mondays against 80% on Thursdays.
Southwest Airlines has a slight edge here.
Southwest Airlines arrived on time 82% of the time on this route; Frontier Airlines managed 79%.
Slipping a little lately.
SAT–DEN flights arrived on time 82% of the time over the last three months in the data, compared with 87% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon84%(448 flights)
- Tue81%(395 flights)
- Wed83%(386 flights)
- Thu80%(457 flights)
- Fri81%(452 flights)
- Sat83%(408 flights)
- Sun81%(444 flights)
- 3–6 AM96%(329 flights)
- 6–9 AM89%(532 flights)
- 9 AM–12 PM88%(442 flights)
- 12–3 PM85%(617 flights)
- 3–6 PM73%(577 flights)
- 6–9 PM65%(493 flights)
Jun 71% → May 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 71% | 266 |
| July 2025 | 74% | 273 |
| August 2025 | 76% | 235 |
| September 2025 | 85% | 217 |
| October 2025 | 83% | 252 |
| November 2025 | 89% | 241 |
| December 2025 | 85% | 282 |
| January 2026 | 89% | 226 |
| February 2026 | 87% | 191 |
| March 2026 | 80% | 293 |
| April 2026 | 86% | 250 |
| May 2026 | 80% | 264 |
Keep nerding
Based on 3,013 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.