Flight number record

DL 2527

Delta Air Lines · Atlanta to Newark

Route: ATL → EWR
Departs: 20:59
Flights: 287
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2527, check with Delta Air Lines.

DL 2527 draws a D. Roughly 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 287 flights, with a median arrival 1 minute late.

The national on-time rate over the same period is 77.3%, so DL 2527 runs 14 points behind the country as a whole. Across a thousand flights that is about 144 extra late arrivals.

On time

62.9%

Arrivals under 15 minutes late, of 278 completed flights

Avg delay

72 min

Across delayed arrivals only, not all flights

Cancelled

2.79%

National rate is 1.89%

1 hour+ late

15.1%

National rate is 8.3%

These figures cover 287 flights between September 2025 and August 2026. Beyond the headline rate, 15.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

Schedule

When DL 2527 flies

DL 2527 flies ATL to EWR without a single fixed slot. Its most common scheduled departure was 20:59, used on 43 of 287 flights, with 21:50 (38 flights) and 20:08 (31 flights) next.

Departs 20:5943 flights15.0%
Departs 21:5038 flights13.2%
Departs 20:0831 flights10.8%

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 20:59 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 2527 runs 7 points worse at 62.9%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

Against the route

DL 2527 next to ATL to EWR

Every carrier on ATL to EWR combined arrived on time 72.3% of the time across 6,246 flights, so DL 2527 is 9 points behind it. Delta flew 3,038 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 81.1%, which this flight trails by 18 points.

DL 2527 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2527thin sample	287	62.9%	72 min	2.79%	D
All Delta Air Lines on ATL–EWR	3,038	71.5%	69 min	3.82%	C−
All carriers on ATL–EWR	6,246	72.3%	78 min	3.78%	C−
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	B

Across the year

DL 2527 quarter by quarter

DL 2527 did not run the same all year. Its best quarter was Apr–Jun 2026 at 75.6% on time and its weakest Jul–Sep 2026 at 32.3%, a swing of 43 points on roughly 57 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 flights73.3%
Oct–Dec 202572 flights58.6%
Jan–Mar 202673 flights62.3%
Apr–Jun 202679 flights75.6%
Jul–Sep 202633 flights32.3%

Scale runs 25% to 80%.

By weekday, DL 2527 did best on Tuesday at 78.1% on time and worst on Monday at 54.2%. Each day rests on about 41 flights, so a gap of 24 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late DL 2527 runs when it is late

The 103 late arrivals split 27 under half an hour, 34 between 30 and 60 minutes, and 42 an hour or more.

15+ min early28 flights10.1%
Within 15 min147 flights52.9%
15–29 min late27 flights9.7%
30–59 min late34 flights12.2%
1–2 hours late25 flights9.0%
2+ hours late17 flights6.1%

Scale runs 0% to 100%.

Share of 278 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 94 departures that left 15 minutes late or more, only 9 made it up before arrival. In the other direction, 18 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at EWR.

The worst days

Worst days for DL 2527

The latest arrival of the period was on 7 December 2025, 6 hours 37 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across December, June and August, with no single month standing out.

The latest arrivals of DL 2527 in the period
Date	Arrived late by	Largest filed cause
7 December 2025	6 hours 37 minutes	Extreme weather
14 June 2026	4 hours 37 minutes	Late-arriving aircraft
13 December 2025	4 hours 20 minutes	Carrier
7 August 2026	3 hours 44 minutes	National Airspace System
2 August 2026	3 hours 40 minutes	National Airspace System

Delay causes

Why DL 2527 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 7,367 reported delay minutes.

National Airspace System
38%
Carrier
32%
Late-arriving aircraft
22%
Extreme weather
8%
Security
1%

38% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 2,795 minutes out of 7,367, against a national NAS share of 21%. The split is drawn from 7,367 delay minutes reported on DL 2527.

Cancellations run at 2.79%, against 1.89% nationally. That is roughly one flight in 40 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

15.1% 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 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.

Every one of the 287 flights under DL 2527 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. 287 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 2527

For a booking, the cancellation rate is the figure to plan around on DL 2527: 2.79% of its 287 scheduled flights did not operate. A late arrival costs a little over 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures