Flight Reliability
DL 2797 · Delta Air Lines
Salt Lake City → San Antonio (SLC–SAT)
83
Pretty Reliable
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 6 min
- Average arrival delay
- 1.1%
- Cancelled
- 7 min early
- Median arrival delay
Based on 364 historical flights. Data through May 2026.
What the data says
Thursday is the weak spot.
DL 2797 arrived on time 87% of the time on Sundays. On Thursdays: 77%.
Trending in the right direction.
DL 2797 arrived on time 89% of the time over the last three months in the data, compared with 77% in the three months before that.
The breakdown
- Mon85%(52 flights)
- Tue82%(51 flights)
- Wed78%(51 flights)
- Thu77%(52 flights)
- Fri78%(51 flights)
- Sat82%(49 flights)
- Sun87%(52 flights)
- 3–6 PM83%(54 flights)
- 6–9 PM81%(304 flights)
83%
May
Jun 86% → May 83% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 86% | 29 |
| July 2025 | 61% | 31 |
| August 2025 | 81% | 31 |
| September 2025 | 76% | 29 |
| October 2025 | 94% | 31 |
| November 2025 | 79% | 29 |
| December 2025 | 83% | 30 |
| January 2026 | 70% | 30 |
| February 2026 | 79% | 28 |
| March 2026 | 100% | 31 |
| April 2026 | 83% | 30 |
| May 2026 | 83% | 29 |
- Departures on time
- 78%
- Diverted
- 0.5%
- Flights flown
- 358
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 364 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.