Flight number record
DL 1689
Delta Air Lines · Detroit to Syracuse
- Route
- DTW → SYR
- Departs
- 21:45
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1689, check with Delta Air Lines.
DL 1689 lands a B, about a point better than the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about 55 minutes on average. That rests on 365 flights, with a median arrival 9 minutes early.
Key figures
On time
78.2%
Arrivals under 15 minutes late, of 357 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
2.19%
National rate is 1.89%
1 hour+ late
5.9%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 9 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When DL 1689 flies
DL 1689 flies DTW to SYR without a single fixed slot. Its most common scheduled departure was 21:45, used on 101 of 365 flights, with 21:50 (69 flights) and 21:35 (50 flights) next.
- Departs 21:45101 flights27.7%
- Departs 21:5069 flights18.9%
- Departs 21:3550 flights13.7%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 21:45 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 1689 runs 8 points better at 78.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 1689 next to DTW to SYR
Every carrier on DTW to SYR combined arrived on time 76.5% of the time across 725 flights, so DL 1689 is 2 points ahead of it. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1689 | 365 | 78.2% | 55 min | 2.19% | B |
| All Delta Air Lines on DTW–SYR | 365 | 78.2% | 55 min | 2.19% | B |
| All carriers on DTW–SYR | 725 | 76.5% | 74 min | 1.10% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1689 quarter by quarter
DL 1689 did not run the same all year. Its best quarter was Apr–Jun 2026 at 87.5% on time and its weakest Oct–Dec 2025 at 73.3%, a swing of 14 points on roughly 73 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights83.3%
- Oct–Dec 202592 flights73.3%
- Jan–Mar 202690 flights73.9%
- Apr–Jun 202691 flights87.5%
- Jul–Sep 202662 flights75.4%
Scale runs 65% to 95%.
By weekday, DL 1689 did best on Thursday at 82.7% on time and worst on Sunday at 68.8%. Each day rests on about 52 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1689 runs when it is late
DL 1689 often beats the schedule: 104 of 357 completed flights, 29%, arrived 15 minutes or more early. The 78 late arrivals split 26 under half an hour, 31 between 30 and 60 minutes, and 21 an hour or more.
- 15+ min early104 flights29.1%
- Within 15 min175 flights49.0%
- 15–29 min late26 flights7.3%
- 30–59 min late31 flights8.7%
- 1–2 hours late14 flights3.9%
- 2+ hours late7 flights2.0%
Scale runs 0% to 100%.
Share of 357 completed flights by arrival against schedule.
14 of 75 late departures made up the time and arrived on time, 19% of them. 17 flights left on time and still arrived late.
The worst days
Worst days for DL 1689
The latest arrival of the period was on 13 April 2026, 3 hours 47 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 April 2026 | 3 hours 47 minutes | Carrier |
| 11 August 2026 | 2 hours 43 minutes | Carrier |
| 8 November 2025 | 2 hours 29 minutes | Carrier |
| 17 March 2026 | 2 hours 17 minutes | Carrier |
| 14 January 2026 | 2 hours 15 minutes | Extreme weather |
Delay causes
Why DL 1689 runs late
Carrier accounts for 53% of the 4,285 delay minutes carriers reported here, and the remaining four split what is left.
- 53%Carrier
- 26%Late-arriving aircraft
- 17%National Airspace System
- 4%Extreme weather
The largest share of delay minutes, 53%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,280 of the 4,285 delay minutes reported here. The split is drawn from 4,285 delay minutes reported on DL 1689.
Cancellations sit at 2.19% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
5.9% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 55 minutes, which a normal layover absorbs.
Every one of the 365 flights under DL 1689 in the data flew DTW to SYR. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 365 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking DL 1689
For a booking, read DL 1689 as 78.2% on time with 2.19% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DTW to SYR, every carrier and departure
- SYR to DTW, the return direction
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.