Flight Reliability
AA 4817 · American Airlines
Dallas–Fort Worth → SGU (DFW–SGU)
78
Usually Fine
WanderNerd Reliability Score
- 79%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 1.1%
- Cancelled
- 9 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
6–9 PM has a slight edge.
Departures between 6–9 PM arrived on time 82% of the time, against 76% between 9 PM–12 AM.
Sunday scaries are real for this one.
AA 4817 arrived on time 84% of the time on Tuesdays. On Sundays: 75%.
Slipping a little lately.
AA 4817 arrived on time 83% of the time over the last three months in the data, compared with 88% in the three months before that.
The breakdown
- Mon79%(52 flights)
- Tue84%(50 flights)
- Wed78%(50 flights)
- Thu77%(52 flights)
- Fri78%(51 flights)
- Sat82%(51 flights)
- Sun75%(51 flights)
- 9 AM–12 PM—(1 flights)
- 6–9 PM82%(183 flights)
- 9 PM–12 AM76%(173 flights)
83%
May
Jun 66% → May 83% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 66% | 29 |
| July 2025 | 57% | 30 |
| August 2025 | 71% | 31 |
| September 2025 | 79% | 29 |
| October 2025 | 81% | 31 |
| November 2025 | 83% | 30 |
| December 2025 | 97% | 31 |
| January 2026 | 80% | 30 |
| February 2026 | 86% | 28 |
| March 2026 | 90% | 30 |
| April 2026 | 75% | 28 |
| May 2026 | 83% | 30 |
- Departures on time
- 78%
- Diverted
- 1.1%
- Flights flown
- 357
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 365 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.