Flight Reliability
F9 3708 · Frontier Airlines
Denver → San Antonio (DEN–SAT)
82
Pretty Reliable
WanderNerd Reliability Score
- 78%
- Arrive within 15 minutes
- 1 min
- Average arrival delay
- 1.0%
- Cancelled
- 13 min early
- Median arrival delay
Based on 100 historical flights. Data through May 2026.
What the data says
Morning flights do better here.
F9 3708 departing between 9 AM–12 PM arrived on time 88% of the time, versus 74% between 9 PM–12 AM.
Friday is doing you no favors.
F9 3708 arrived on time 100% of the time on Wednesdays and just 60% on Fridays. That gap is worth planning around.
A bit ahead of the Frontier Airlines network.
F9 3708 arrived on time 78% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon75%(16 flights)
- Tue90%(10 flights)
- Wed100%(11 flights)
- Thu82%(17 flights)
- Fri60%(15 flights)
- Sat71%(14 flights)
- Sun75%(16 flights)
- 6–9 AM—(5 flights)
- 9 AM–12 PM88%(17 flights)
- 12–3 PM—(3 flights)
- 3–6 PM—(4 flights)
- 9 PM–12 AM74%(70 flights)
86%
Apr
Nov 100% → Apr 86% on time
| Month | On-time percentage | Flights |
|---|---|---|
| November 2025 | 100% | 11 |
| December 2025 | 74% | 19 |
| March 2026 | 54% | 26 |
| April 2026 | 86% | 29 |
- Departures on time
- 74%
- Diverted
- 0%
- Flights flown
- 99
- Months covered
- 7
Same route, other flights
Keep nerding
Based on 100 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.