Flight number record

DL 2552

Delta Air Lines · Atlanta to Newark

Route: ATL → EWR
Departs: 22:50
Flights: 302
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2552, check with Delta Air Lines.

DL 2552 draws a C. About one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 302 flights, with a median arrival 2 minutes early.

The national on-time rate over the same period is 77.6%, so DL 2552 runs 10 points behind the country as a whole. Across a thousand flights that is about 103 extra late arrivals.

On time

67.3%

Arrivals under 15 minutes late, of 294 completed flights

Avg delay

71 min

Across delayed arrivals only, not all flights

Cancelled

2.32%

National rate is 1.81%

1 hour+ late

12.2%

National rate is 8.1%

These figures cover 302 flights between July 2025 and June 2026. Beyond the headline rate, 12.2% 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 2552 flies

DL 2552 flies ATL to EWR without a single fixed slot. Its most common scheduled departure was 22:50, used on 72 of 302 flights, with 22:45 (56 flights) and 21:50 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 22:5072 flights23.8%
Departs 22:4556 flights18.5%
Departs 21:5038 flights12.6%

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 22:50 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 2552 runs 3 points worse at 67.3%. 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 2552 next to ATL to EWR

Every carrier on ATL to EWR combined arrived on time 72.8% of the time across 6,285 flights, so DL 2552 is 6 points behind it. Delta flew 3,055 flights on the same city pair under all its flight numbers, including this one, and those ran 71.5% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 14 points.

DL 2552 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2552thin sample	302	67.3%	71 min	2.32%	C
All Delta Air Lines on ATL–EWR	3,055	71.5%	66 min	3.31%	C−
All carriers on ATL–EWR	6,285	72.8%	74 min	3.34%	C−
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2552 quarter by quarter

DL 2552 did not run the same all year. Its best quarter was Apr–Jun 2026 at 73.4% on time and its weakest Jul–Sep 2025 at 63.0%, a swing of 10 points on roughly 76 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 202582 flights63.0%
Oct–Dec 202592 flights66.7%
Jan–Mar 202663 flights67.8%
Apr–Jun 202665 flights73.4%

Scale runs 55% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2552 did best on Tuesday at 78.8% on time and worst on Sunday at 56.2%. Each day rests on about 43 flights, so a gap of 23 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2552 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 6,768 reported delay minutes.

Carrier
39%
National Airspace System
28%
Late-arriving aircraft
20%
Extreme weather
14%

Extreme weather accounts for 14% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.2 times the usual weather exposure. The split is drawn from 6,768 delay minutes reported on DL 2552.

Cancellations sit at 2.32% against a national 1.81%, which is ordinary. Diversions add another 0.33%.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 12.2% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

The 746 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 302 flights under DL 2552 in the data flew ATL to EWR. 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. 302 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 2552

For a booking, DL 2552 is a flight to put a long connection behind. 12.2% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.

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