Flight Reliability
DL 2581 · Delta Air Lines
Austin → Salt Lake City (AUS–SLC)81% of its flights flew this route. The rest (CLT–DTW, SLC–AUS) are included in these numbers.
- 86%
- Arrive within 15 minutes
- 1 min early
- Average arrival delay
- 1.6%
- Cancelled
- 12 min early
- Median arrival delay
Based on 185 historical flights. Data through May 2026.
What the data says
Morning-you made the right choice.
DL 2581 departing between 9 AM–12 PM arrived on time 90% of the time, versus 81% between 12–3 PM.
Thursdays have been rough.
DL 2581 arrived on time 92% of the time on Sundays and just 74% on Thursdays. That gap is worth planning around.
A bit ahead of the Delta Air Lines network.
DL 2581 arrived on time 86% of the time, versus 81% across the Delta Air Lines network.
Ticking up lately.
DL 2581 arrived on time 88% of the time over the last three months in the data, compared with 84% in the three months before that.
The breakdown
- Mon82%(27 flights)
- Tue85%(27 flights)
- Wed91%(23 flights)
- Thu74%(23 flights)
- Fri92%(25 flights)
- Sat87%(31 flights)
- Sun92%(26 flights)
- 9 AM–12 PM90%(19 flights)
- 12–3 PM81%(16 flights)
- 3–6 PM—(4 flights)
- 6–9 PM87%(143 flights)
Jun 100% → May 92% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 100% | 11 |
| December 2025 | 78% | 18 |
| January 2026 | 81% | 31 |
| February 2026 | 94% | 31 |
| March 2026 | 75% | 32 |
| April 2026 | 97% | 30 |
| May 2026 | 92% | 25 |
- Departures on time
- 84%
- Diverted
- 0%
- Flights flown
- 182
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 185 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.