Flight Reliability
DL 717 · Delta Air Lines
San Francisco → Detroit (SFO–DTW)82% of its flights flew this route. The rest (CHA–ATL, SAV–ATL) are included in these numbers.
- 79%
- Arrive within 15 minutes
- 2 min
- Average arrival delay
- 1.9%
- Cancelled
- 8 min early
- Median arrival delay
Based on 308 historical flights. Data through May 2026.
What the data says
Morning flights do better here.
DL 717 departing between 3–6 AM arrived on time 97% of the time, versus 75% between 12–3 PM.
Mondays have been rough.
DL 717 arrived on time 94% of the time on Tuesdays and just 73% on Mondays. That gap is worth planning around.
Recent months have been rougher.
DL 717 arrived on time 67% of the time over the last three months in the data, compared with 93% in the three months before that.
The breakdown
- Mon73%(48 flights)
- Tue94%(46 flights)
- Wed73%(45 flights)
- Thu76%(45 flights)
- Fri79%(43 flights)
- Sat79%(28 flights)
- Sun79%(47 flights)
- 3–6 AM97%(34 flights)
- 6–9 AM93%(14 flights)
- 9 AM–12 PM—(3 flights)
- 12–3 PM75%(251 flights)
Jun 72% → May 36% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 72% | 29 |
| July 2025 | 77% | 30 |
| August 2025 | 90% | 31 |
| September 2025 | 72% | 25 |
| October 2025 | 83% | 30 |
| November 2025 | 81% | 26 |
| December 2025 | 82% | 22 |
| January 2026 | 96% | 28 |
| February 2026 | 100% | 11 |
| March 2026 | 90% | 20 |
| April 2026 | 76% | 25 |
| May 2026 | 36% | 25 |
- Departures on time
- 81%
- Diverted
- 0%
- Flights flown
- 302
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 308 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.