Flight number record

DL 2123

Delta Air Lines · Atlanta to Syracuse

Route: ATL → SYR
Departs: 21:40
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2123, check with Delta Air Lines.

DL 2123 lands a B−, about a point 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 3 minutes early.

On time

76.6%

Arrivals under 15 minutes late, of 354 completed flights

Avg delay

57 min

Across delayed arrivals only, not all flights

Cancelled

3.01%

National rate is 1.81%

1 hour+ late

8.5%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. Beyond the headline rate, 8.5% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

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 81 of 365 flights, with 21:43 (52 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:4081 flights22.2%
Departs 21:4352 flights14.2%

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 21:40 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 2123 runs 6 points better at 76.6%. 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 2123 next to ATL to SYR

Every carrier on ATL to SYR combined arrived on time 81.2% of the time across 1,091 flights, so DL 2123 is 5 points behind it. Delta flew 1,046 flights on the same city pair under all its flight numbers, including this one, and those ran 81.6% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 5 points.

DL 2123 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2123	365	76.6%	57 min	3.01%	B−
All Delta Air Lines on ATL–SYR	1,046	81.6%	52 min	2.39%	B
All carriers on ATL–SYR	1,091	81.2%	51 min	2.47%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2123 quarter by quarter

Quarter by quarter DL 2123 held fairly steady: 73.0% in Jul–Sep 2025, 76.7% in Oct–Dec 2025, 74.4% in Jan–Mar 2026 and 82.0% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights73.0%
Oct–Dec 202592 flights76.7%
Jan–Mar 202690 flights74.4%
Apr–Jun 202691 flights82.0%

Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2123 did best on Wednesday at 88.5% on time and worst on Sunday at 63.3%. Each day rests on about 52 flights, so a gap of 25 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2123 runs late

One category carries most of the weight here. Carrier accounts for 52% of the 4,737 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.

Carrier
52%
Late-arriving aircraft
32%
National Airspace System
12%
Extreme weather
5%

The largest share of delay minutes, 52%, 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 2,445 of the 4,737 delay minutes reported here. The split is drawn from 4,737 delay minutes reported on DL 2123.

Cancellations run at 3.01%, against 1.81% nationally. That is roughly one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.

Connections and routes

What a delay on this flight costs

8.5% 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.

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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

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, the cancellation rate is the figure to plan around on DL 2123: 3.01% of its 365 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.

Where to go next

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.

Key figures