Flight Reliability
DL 1617 · Delta Air Lines
Atlanta → GSO (ATL–GSO)90% of its flights flew this route. The rest (ATL–BNA, BNA–ATL) are included in these numbers.
- 82%
- Arrive within 15 minutes
- 5 min
- Average arrival delay
- 2.2%
- Cancelled
- 5 min early
- Median arrival delay
Based on 321 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
DL 1617 departing between 12–3 PM arrived on time 94% of the time, versus 71% between 9 PM–12 AM.
Friday is doing you no favors.
DL 1617 arrived on time 92% of the time on Saturdays and just 72% on Fridays. That gap is worth planning around.
Recent months have been rougher.
DL 1617 arrived on time 78% of the time over the last three months in the data, compared with 90% in the three months before that.
The breakdown
- Mon88%(51 flights)
- Tue84%(37 flights)
- Wed80%(39 flights)
- Thu81%(52 flights)
- Fri72%(47 flights)
- Sat92%(36 flights)
- Sun77%(52 flights)
- 9 AM–12 PM88%(16 flights)
- 12–3 PM94%(16 flights)
- 6–9 PM84%(207 flights)
- 9 PM–12 AM71%(75 flights)
Jun 67% → May 81% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 67% | 18 |
| July 2025 | 40% | 15 |
| August 2025 | 73% | 26 |
| September 2025 | 93% | 30 |
| October 2025 | 94% | 31 |
| November 2025 | 82% | 28 |
| December 2025 | 83% | 41 |
| January 2026 | 93% | 29 |
| February 2026 | 94% | 18 |
| March 2026 | 74% | 27 |
| April 2026 | 80% | 30 |
| May 2026 | 81% | 21 |
- Departures on time
- 82%
- Diverted
- 0%
- Flights flown
- 314
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 321 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.