Flight number record
DL 2123
Delta Air Lines · Atlanta to Syracuse
- Route
- ATL → SYR
- Departs
- 21:40
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2123, check with Delta Air Lines.
DL 2123 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 365 flights, with a median arrival 2 minutes early.
Key figures
On time
74.5%
Arrivals under 15 minutes late, of 357 completed flights
Avg delay
60 min
Across delayed arrivals only, not all flights
Cancelled
2.19%
National rate is 1.89%
1 hour+ late
9.8%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. Beyond the headline rate, 9.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 2123 flies
DL 2123 flies ATL to SYR without a single fixed slot. Its most common scheduled departure was 21:40, used on 60 of 365 flights, with 21:43 (52 flights) next.
- Departs 21:4060 flights16.4%
- Departs 21:4352 flights14.2%
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 21:40 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 2123 runs 4 points better at 74.5%. 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 2123 next to ATL to SYR
Every carrier on ATL to SYR combined arrived on time 80.0% of the time across 1,124 flights, so DL 2123 is 6 points behind it. Delta flew 1,096 flights on the same city pair under all its flight numbers, including this one, and those ran 80.0% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2123 | 365 | 74.5% | 60 min | 2.19% | C |
| All Delta Air Lines on ATL–SYR | 1,096 | 80.0% | 55 min | 1.82% | B |
| All carriers on ATL–SYR | 1,124 | 80.0% | 55 min | 1.87% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2123 quarter by quarter
DL 2123 did not run the same all year. Its best quarter was Jul–Sep 2025 at 83.3% on time and its weakest Jul–Sep 2026 at 56.5%, a swing of 27 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 flights76.7%
- Jan–Mar 202690 flights74.4%
- Apr–Jun 202691 flights82.0%
- Jul–Sep 202662 flights56.5%
Scale runs 50% to 90%.
By weekday, DL 2123 did best on Wednesday at 90.4% on time and worst on Sunday at 65.3%. Each day rests on about 52 flights, so a gap of 25 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2123 runs when it is late
The 91 late arrivals split 28 under half an hour, 28 between 30 and 60 minutes, and 35 an hour or more.
- 15+ min early61 flights17.1%
- Within 15 min205 flights57.4%
- 15–29 min late28 flights7.8%
- 30–59 min late28 flights7.8%
- 1–2 hours late25 flights7.0%
- 2+ hours late10 flights2.8%
Scale runs 0% to 100%.
Share of 357 completed flights by arrival against schedule.
15 of 96 late departures made up the time and arrived on time, 16% of them. 10 flights left on time and still arrived late.
The worst days
Worst days for DL 2123
The latest arrival of the period was on 9 March 2026, 3 hours 24 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across March, July, December and November, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 9 March 2026 | 3 hours 24 minutes | Extreme weather |
| 3 July 2026 | 3 hours 14 minutes | Late-arriving aircraft |
| 4 July 2026 | 3 hours 5 minutes | Carrier |
| 28 December 2025 | 2 hours 55 minutes | Carrier |
| 8 November 2025 | 2 hours 52 minutes | Late-arriving aircraft |
Delay causes
Why DL 2123 runs late
Carrier accounts for 49% of the 5,446 delay minutes carriers reported here, and the remaining four split what is left.
- 49%Carrier
- 34%Late-arriving aircraft
- 14%National Airspace System
- 3%Extreme weather
34% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,446 reported delay minutes here, that single category outweighs weather by 12 to one. The split is drawn from 5,446 delay minutes reported on DL 2123.
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
9.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 794 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
Every one of the 365 flights under DL 2123 in the data flew ATL 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 2123
For a booking, DL 2123 is one of the weaker ways to fly ATL to SYR: 6 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- ATL to SYR, every carrier and departure
- SYR to ATL, the return direction
- Delta Air Lines 1375 on the same route85.6%
- Delta Air Lines 2690 on the same route79.9%
- Hartsfield-Jackson Atlanta International (ATL) 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
- Why the first flight of the morning is statistically safest
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.