Flight number record

DL 2144

Delta Air Lines · Atlanta to Madison

Route: ATL → MSN
Departs: 21:28
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2144, check with Delta Air Lines.

DL 2144 lands a B, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 365 flights, with a median arrival 6 minutes early.

Set against the rest of the country, DL 2144's record is 5 points better than the US average of 77.6%. That gap is worth roughly 54 fewer late arrivals for every thousand flights.

On time

83.0%

Arrivals under 15 minutes late, of 359 completed flights

Avg delay

74 min

Across delayed arrivals only, not all flights

Cancelled

1.64%

National rate is 1.81%

1 hour+ late

5.6%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 6 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 2144 flies

DL 2144 flies ATL to MSN without a single fixed slot. Its most common scheduled departure was 21:28, used on 56 of 365 flights, with 21:45 (48 flights) and 21:20 (41 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:2856 flights15.3%
Departs 21:4548 flights13.2%
Departs 21:2041 flights11.2%

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 21:28 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 2144 runs 13 points better at 83.0%. 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 2144 next to ATL to MSN

Every carrier on ATL to MSN combined arrived on time 84.5% of the time across 1,025 flights, so DL 2144 is 2 points behind it. Across its whole network Delta Air Lines managed 81.6%, close to this flight's figure.

DL 2144 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2144	365	83.0%	74 min	1.64%	B
All Delta Air Lines on ATL–MSN	1,025	84.5%	58 min	1.76%	B
All carriers on ATL–MSN	1,025	84.5%	58 min	1.76%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2144 quarter by quarter

DL 2144 did not run the same all year. Its best quarter was Oct–Dec 2025 at 89.0% on time and its weakest Jul–Sep 2025 at 77.2%, a swing of 12 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 flights77.2%
Oct–Dec 202592 flights89.0%
Jan–Mar 202690 flights80.7%
Apr–Jun 202691 flights85.2%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2144 did best on Wednesday at 94.1% on time and worst on Friday at 72.5%. 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 2144 runs late

One category carries most of the weight here. Carrier accounts for 50% of the 4,541 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
50%
National Airspace System
21%
Late-arriving aircraft
20%
Extreme weather
9%

The largest share of delay minutes, 50%, 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 2,283 of the 4,541 delay minutes reported here. The split is drawn from 4,541 delay minutes reported on DL 2144.

Cancellations sit at 1.64% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

5.6% 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 a little over an hour, which a normal layover absorbs.

The 707 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 2144 in the data flew ATL to MSN. 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 2144

For a booking, read DL 2144 as 83.0% on time with 1.64% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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