Flight Reliability
DL 526 · Delta Air Lines
Atlanta → Salt Lake City (ATL–SLC)
89
Pretty Reliable
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 2 min
- Average arrival delay
- 0%
- Cancelled
- 7 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
DL 526 arrived on time 90% of the time on Wednesdays and just 75% on Fridays. That gap is worth planning around.
It basically never cancels.
Out of 365 scheduled flights, only 0.0% were cancelled.
Trending in the right direction.
DL 526 arrived on time 87% of the time over the last three months in the data, compared with 74% in the three months before that.
The breakdown
- Mon75%(52 flights)
- Tue83%(52 flights)
- Wed90%(52 flights)
- Thu75%(52 flights)
- Fri75%(52 flights)
- Sat85%(52 flights)
- Sun81%(53 flights)
- 12–3 PM79%(62 flights)
- 3–6 PM81%(303 flights)
97%
May
Jun 63% → May 97% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 63% | 30 |
| July 2025 | 71% | 31 |
| August 2025 | 77% | 31 |
| September 2025 | 90% | 30 |
| October 2025 | 100% | 31 |
| November 2025 | 83% | 30 |
| December 2025 | 65% | 31 |
| January 2026 | 71% | 31 |
| February 2026 | 86% | 28 |
| March 2026 | 74% | 31 |
| April 2026 | 90% | 30 |
| May 2026 | 97% | 31 |
- Departures on time
- 79%
- Diverted
- 0%
- Flights flown
- 365
- 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.