Flight number record
DL 2940
Delta Air Lines · Atlanta to Detroit
- Route
- ATL → DTW
- Departs
- 22:59
- Flights
- 354
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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, 5 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 354 flights, with a median arrival 3 minutes early.
The national on-time rate over the same period is 77.3%, so DL 2940 runs 5 points behind the country as a whole. Across a thousand flights that is about 47 extra late arrivals.
Key figures
On time
72.6%
Arrivals under 15 minutes late, of 351 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
0.85%
National rate is 1.89%
1 hour+ late
10.0%
National rate is 8.3%
These figures cover 354 flights between September 2025 and August 2026. Beyond the headline rate, 10.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 2940 flies
DL 2940 flies ATL to DTW without a single fixed slot. Its most common scheduled departure was 22:59, used on 101 of 354 flights, with 22:44 (94 flights) and 22:45 (64 flights) next.
- Departs 22:59101 flights28.5%
- Departs 22:4494 flights26.6%
- Departs 22:4564 flights18.1%
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 22:59 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 2940 runs 3 points better at 72.6%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 2940 next to ATL to DTW
Every carrier on ATL to DTW combined arrived on time 76.4% of the time across 4,821 flights, so DL 2940 is 4 points behind it. Delta flew 3,774 flights on the same city pair under all its flight numbers, including this one, and those ran 77.9% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2940thin sample | 354 | 72.6% | 62 min | 0.85% | C+ |
| All Delta Air Lines on ATL–DTW | 3,774 | 77.9% | 60 min | 0.50% | B+ |
| All carriers on ATL–DTW | 4,821 | 76.4% | 64 min | 0.81% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2940 quarter by quarter
Quarter by quarter DL 2940 held fairly steady: 70.0% in Jul–Sep 2025, 69.7% in Oct–Dec 2025, 75.0% in Jan–Mar 2026, 77.0% in Apr–Jun 2026 and 68.4% in Jul–Sep 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 202530 flights70.0%
- Oct–Dec 202589 flights69.7%
- Jan–Mar 202690 flights75.0%
- Apr–Jun 202688 flights77.0%
- Jul–Sep 202657 flights68.4%
Scale runs 60% to 80%.
By weekday, DL 2940 did best on Wednesday at 88.2% on time and worst on Sunday at 60.0%. Each day rests on about 51 flights, so a gap of 28 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2940 runs when it is late
The 96 late arrivals split 29 under half an hour, 32 between 30 and 60 minutes, and 35 an hour or more.
- 15+ min early82 flights23.4%
- Within 15 min173 flights49.3%
- 15–29 min late29 flights8.3%
- 30–59 min late32 flights9.1%
- 1–2 hours late26 flights7.4%
- 2+ hours late9 flights2.6%
Scale runs 0% to 100%.
Share of 351 completed flights by arrival against schedule.
18 of 105 late departures made up the time and arrived on time, 17% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for DL 2940
The latest arrival of the period was on 10 March 2026, 8 hours 9 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 10 March 2026 | 8 hours 9 minutes | Carrier |
| 19 May 2026 | 3 hours 34 minutes | Carrier |
| 11 June 2026 | 2 hours 27 minutes | Carrier |
| 26 October 2025 | 2 hours 24 minutes | Late-arriving aircraft |
| 6 August 2026 | 2 hours 20 minutes | Late-arriving aircraft |
Delay causes
Why DL 2940 runs late
Carrier accounts for 59% of the 5,917 delay minutes carriers reported here, and the remaining four split what is left.
- 59%Carrier
- 29%Late-arriving aircraft
- 10%National Airspace System
- 1%Extreme weather
The largest share of delay minutes, 59%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,506 of the 5,917 delay minutes reported here. The split is drawn from 5,917 delay minutes reported on DL 2940.
Cancellations are rare at 0.85%, below the national 1.89% 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
10.0% 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 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.
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, read DL 2940 as 72.6% on time with 0.85% cancelled over 354 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ATL to DTW, every carrier and departure
- DTW to ATL, the return direction
- Delta Air Lines 1298 on the same route84.3%
- Delta Air Lines 1031 on the same route83.9%
- Delta Air Lines 1240 on the same route82.7%
- Delta Air Lines 1646 on the same route90.6%
- Delta Air Lines 1005 on the same route75.2%
- Delta Air Lines 2067 on the same route74.6%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- How often a connection fails at the major US hubs
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 ; recomputed monthly. How this data is collected.