Flight Reliability
DL 1689 · Delta Air Lines
Detroit → Syracuse (DTW–SYR)98% of its flights flew this route. The rest (MIA–JFK) are included in these numbers.
77
Usually Fine
WanderNerd Reliability Score
- 75%
- Arrive within 15 minutes
- 9 min
- Average arrival delay
- 1.6%
- Cancelled
- 9 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 1689 arrived on time 81% of the time on Tuesdays and just 62% on Sundays. That gap is worth planning around.
A bit behind the Delta Air Lines network.
DL 1689 arrived on time 75% of the time, versus 81% across the Delta Air Lines network.
Trending in the right direction.
DL 1689 arrived on time 86% of the time over the last three months in the data, compared with 73% in the three months before that.
The breakdown
- Mon73%(51 flights)
- Tue81%(52 flights)
- Wed71%(52 flights)
- Thu81%(52 flights)
- Fri78%(51 flights)
- Sat80%(51 flights)
- Sun62%(50 flights)
- 3–6 PM—(2 flights)
- 6–9 PM—(7 flights)
- 9 PM–12 AM77%(350 flights)
90%
May
Jun 60% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 60% | 30 |
| July 2025 | 55% | 31 |
| August 2025 | 71% | 31 |
| September 2025 | 83% | 30 |
| October 2025 | 84% | 31 |
| November 2025 | 76% | 29 |
| December 2025 | 63% | 30 |
| January 2026 | 69% | 29 |
| February 2026 | 86% | 28 |
| March 2026 | 71% | 31 |
| April 2026 | 96% | 28 |
| May 2026 | 90% | 31 |
- Departures on time
- 76%
- Diverted
- 0%
- Flights flown
- 359
- 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.