Flight number record
DL 2939
Delta Air Lines · Atlanta to Memphis
- Route
- ATL → MEM
- Departs
- 17:53
- Flights
- 344
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2939, check with Delta Air Lines.
DL 2939 lands a B, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 344 flights, with a median arrival 4 minutes early.
Key figures
On time
77.2%
Arrivals under 15 minutes late, of 337 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
1.45%
National rate is 1.89%
1 hour+ late
9.2%
National rate is 8.3%
These figures cover 344 flights between September 2025 and August 2026. Beyond the headline rate, 9.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 2939 flies
DL 2939 flies ATL to MEM without a single fixed slot. Its most common scheduled departure was 17:53, used on 54 of 344 flights, with 17:50 (50 flights) and 17:45 (39 flights) next.
- Departs 17:5354 flights15.7%
- Departs 17:5050 flights14.5%
- Departs 17:4539 flights11.3%
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 17:53 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 2939 runs 9 points better at 77.2%. 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 2939 next to ATL to MEM
Every carrier on ATL to MEM combined arrived on time 81.1% of the time across 3,430 flights, so DL 2939 is 4 points behind it. Delta flew 3,345 flights on the same city pair under all its flight numbers, including this one, and those ran 81.4% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2939thin sample | 344 | 77.2% | 75 min | 1.45% | B |
| All Delta Air Lines on ATL–MEM | 3,345 | 81.4% | 64 min | 1.76% | B |
| All carriers on ATL–MEM | 3,430 | 81.1% | 65 min | 1.78% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2939 quarter by quarter
DL 2939 did not run the same all year. Its best quarter was Oct–Dec 2025 at 84.1% on time and its weakest Jul–Sep 2026 at 63.3%, a swing of 21 points on roughly 69 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 flights80.0%
- Oct–Dec 202582 flights84.1%
- Jan–Mar 202681 flights80.5%
- Apr–Jun 202690 flights76.1%
- Jul–Sep 202661 flights63.3%
Scale runs 55% to 90%.
By weekday, DL 2939 did best on Wednesday at 86.5% on time and worst on Monday at 66.0%. Each day rests on about 49 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2939 runs when it is late
The 77 late arrivals split 26 under half an hour, 20 between 30 and 60 minutes, and 31 an hour or more.
- 15+ min early54 flights16.0%
- Within 15 min206 flights61.1%
- 15–29 min late26 flights7.7%
- 30–59 min late20 flights5.9%
- 1–2 hours late16 flights4.7%
- 2+ hours late15 flights4.5%
Scale runs 0% to 100%.
Share of 337 completed flights by arrival against schedule.
15 of 83 late departures made up the time and arrived on time, 18% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for DL 2939
The latest arrival of the period was on 7 December 2025, 5 hours 18 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 December 2025 | 5 hours 18 minutes | Late-arriving aircraft |
| 8 November 2025 | 4 hours 54 minutes | Late-arriving aircraft |
| 11 July 2026 | 4 hours 27 minutes | National Airspace System |
| 14 June 2026 | 4 hours | National Airspace System |
| 24 July 2026 | 3 hours 42 minutes | Late-arriving aircraft |
Delay causes
Why DL 2939 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 5,738 reported delay minutes.
- 41%Late-arriving aircraft
- 34%Carrier
- 22%National Airspace System
- 3%Extreme weather
41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,738 reported delay minutes here, that single category outweighs weather by 13 to one. The split is drawn from 5,738 delay minutes reported on DL 2939.
Cancellations sit at 1.45% against a national 1.89%, which is ordinary. Diversions add another 0.58%.
Connections and routes
What a delay on this flight costs
9.2% 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 same number turns up on two other city pairs in the data, including MEM to ATL (174) and ATL to TYS (1), but none flew often enough under DL 2939 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to MEM only.
One caution: this is a thin sample. 344 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 2939
For a booking, read DL 2939 as 77.2% on time with 1.45% cancelled over 344 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ATL to MEM, every carrier and departure
- MEM to ATL, the return direction
- Delta Air Lines 2501 on the same route74.4%
- Delta Air Lines 1700 on the same route78.4%
- Delta Air Lines 2778 on the same route87.4%
- Delta Air Lines 1681 on the same route83.7%
- Delta Air Lines 2071 on the same route89.7%
- Delta Air Lines 2001 on the same route76.2%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Memphis International (MEM) 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
- Why the first flight of the morning is statistically safest
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.