Flight number record
DL 1689
Delta Air Lines · Detroit to Syracuse
- Route
- DTW → SYR
- Departs
- 21:45
- Flights
- 365
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1689, check with Delta Air Lines.
DL 1689 lands a B, 2 points worse than the national rate of 77.6%. About one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 365 flights, with a median arrival 9 minutes early.
Key figures
On time
76.0%
Arrivals under 15 minutes late, of 358 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
1.92%
National rate is 1.81%
1 hour+ late
7.0%
National rate is 8.1%
These figures cover 365 flights between July 2025 and June 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.
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 113 of 365 flights, with 21:50 (69 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 21:45113 flights31.0%
- Departs 21:5069 flights18.9%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
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 70.5%, and DL 1689 runs 6 points better at 76.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Against the route
DL 1689 next to DTW to SYR
Every carrier on DTW to SYR combined arrived on time 77.1% of the time across 628 flights, so DL 1689 is about level with it. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1689 | 365 | 76.0% | 61 min | 1.92% | B |
| All Delta Air Lines on DTW–SYR | 365 | 76.0% | 61 min | 1.92% | B |
| All carriers on DTW–SYR | 628 | 77.1% | 73 min | 1.11% | B |
| Delta Air Lines, whole network | 1,038,570 | 81.6% | 71 min | 1.62% | 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 Jul–Sep 2025 at 69.6%, a swing of 18 points on roughly 91 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 202592 flights69.6%
- Oct–Dec 202592 flights73.3%
- Jan–Mar 202690 flights73.9%
- Apr–Jun 202691 flights87.5%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1689 did best on Thursday at 84.6% on time and worst on Sunday at 62.5%. Each day rests on about 52 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Delay causes
Why DL 1689 runs late
One category carries most of the weight here. Carrier accounts for 57% of the 5,244 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 57%Carrier
- 22%Late-arriving aircraft
- 14%National Airspace System
- 7%Extreme weather
The largest share of delay minutes, 57%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 3,013 of the 5,244 delay minutes reported here. The split is drawn from 5,244 delay minutes reported on DL 1689.
Cancellations sit at 1.92% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
7.0% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, 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 76.0% on time with 1.92% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.