Flight number record

DL 2940

Delta Air Lines · Atlanta to Detroit

Route: ATL → DTW
Departs: 22:44
Flights: 354
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2940, check with Delta Air Lines.

DL 2940 sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 8 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 354 flights, with a median arrival 2 minutes early.

The national on-time rate over the same period is 77.6%, so DL 2940 runs 8 points behind the country as a whole. Across a thousand flights that is about 81 extra late arrivals.

On time

69.5%

Arrivals under 15 minutes late, of 351 completed flights

Avg delay

65 min

Across delayed arrivals only, not all flights

Cancelled

0.85%

National rate is 1.81%

1 hour+ late

10.8%

National rate is 8.1%

These figures cover 354 flights between July 2025 and June 2026. Beyond the headline rate, 10.8% 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 2940 flies

DL 2940 flies ATL to DTW without a single fixed slot. Its most common scheduled departure was 22:44, used on 94 of 354 flights, with 22:59 (69 flights) and 22:45 (64 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 22:4494 flights26.6%
Departs 22:5969 flights19.5%
Departs 22:4564 flights18.1%

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 22:44 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 2940 runs level with that at 69.5%. 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 2940 next to ATL to DTW

Every carrier on ATL to DTW combined arrived on time 78.0% of the time across 4,871 flights, so DL 2940 is 9 points behind it. Delta flew 3,698 flights on the same city pair under all its flight numbers, including this one, and those ran 79.5% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 12 points.

DL 2940 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2940thin sample	354	69.5%	65 min	0.85%	C+
All Delta Air Lines on ATL–DTW	3,698	79.5%	57 min	0.51%	B+
All carriers on ATL–DTW	4,871	78.0%	63 min	0.82%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2940 quarter by quarter

DL 2940 did not run the same all year. Its best quarter was Apr–Jun 2026 at 77.0% on time and its weakest Jul–Sep 2025 at 56.3%, a swing of 21 points on roughly 89 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 202587 flights56.3%
Oct–Dec 202589 flights69.7%
Jan–Mar 202690 flights75.0%
Apr–Jun 202688 flights77.0%

Scale runs 50% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2940 did best on Wednesday at 82.4% on time and worst on Sunday at 58.8%. Each day rests on about 51 flights, so a gap of 24 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2940 runs late

One category carries most of the weight here. Carrier accounts for 67% of the 6,980 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
67%
Late-arriving aircraft
22%
National Airspace System
9%
Extreme weather
3%

The largest share of delay minutes, 67%, 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 4,647 of the 6,980 delay minutes reported here. The split is drawn from 6,980 delay minutes reported on DL 2940.

Cancellations are rare at 0.85%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

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. 10.8% 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 594 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 354 flights under DL 2940 in the data flew ATL to DTW. 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. 354 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 2940

For a booking, DL 2940 is one of the weaker ways to fly ATL to DTW: 9 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.

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