Flight number record
DL 1624
Delta Air Lines · Memphis to Atlanta
- Route
- MEM → ATL
- Departs
- 07:05
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1624, check with Delta Air Lines.
DL 1624 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 365 flights, with a median arrival 16 minutes early.
Set against the rest of the country, DL 1624's record is 13 points better than the US average of 77.3%. That gap is worth roughly 126 fewer late arrivals for every thousand flights.
Key figures
On time
89.9%
Arrivals under 15 minutes late, of 356 completed flights
Avg delay
98 min
Across delayed arrivals only, not all flights
Cancelled
2.47%
National rate is 1.89%
1 hour+ late
6.2%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 16 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.
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Schedule
When DL 1624 flies
DL 1624 flies MEM to ATL without a single fixed slot. Its most common scheduled departure was 07:05, used on 91 of 365 flights, with 07:00 (72 flights) and 06:20 (49 flights) next.
- Departs 07:0591 flights24.9%
- Departs 07:0072 flights19.7%
- Departs 06:2049 flights13.4%
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 07:05 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1624 runs level with that at 89.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 1624 next to MEM to ATL
Every carrier on MEM to ATL combined arrived on time 86.2% of the time across 3,432 flights, so DL 1624 is 4 points ahead of it. Delta flew 3,348 flights on the same city pair under all its flight numbers, including this one, and those ran 86.7% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1624 | 365 | 89.9% | 98 min | 2.47% | A |
| All Delta Air Lines on MEM–ATL | 3,348 | 86.7% | 94 min | 1.85% | A |
| All carriers on MEM–ATL | 3,432 | 86.2% | 93 min | 1.92% | A |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1624 quarter by quarter
Quarter by quarter DL 1624 held fairly steady: 93.3% in Jul–Sep 2025, 90.1% in Oct–Dec 2025, 87.1% in Jan–Mar 2026, 91.0% in Apr–Jun 2026 and 90.2% in Jul–Sep 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights93.3%
- Oct–Dec 202592 flights90.1%
- Jan–Mar 202690 flights87.1%
- Apr–Jun 202691 flights91.0%
- Jul–Sep 202662 flights90.2%
Scale runs 80% to 100%.
By weekday, DL 1624 ranged from 86.8% on Monday to 98.1% on Thursday. With about 52 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 1624 runs when it is late
DL 1624 often beats the schedule: 200 of 356 completed flights, 56%, arrived 15 minutes or more early. When DL 1624 is late it tends to be very late: 22 of its 36 late arrivals were an hour or more behind, and 7 were two hours or more.
- 15+ min early200 flights56.2%
- Within 15 min120 flights33.7%
- 15–29 min late6 flights1.7%
- 30–59 min late8 flights2.2%
- 1–2 hours late15 flights4.2%
- 2+ hours late7 flights2.0%
Scale runs 0% to 100%.
Share of 356 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 34 departures that left 15 minutes late or more, only 1 made it up before arrival. Only 3 left on time and still arrived late.
The worst days
Worst days for DL 1624
The latest arrival of the period was on 30 October 2025, 11 hours 33 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 |
|---|---|---|
| 30 October 2025 | 11 hours 33 minutes | Carrier |
| 7 February 2026 | 3 hours 38 minutes | Late-arriving aircraft |
| 15 June 2026 | 3 hours 18 minutes | Carrier |
| 13 April 2026 | 3 hours 14 minutes | Carrier |
| 7 December 2025 | 3 hours 5 minutes | National Airspace System |
Delay causes
Why DL 1624 runs late
Carrier accounts for 69% of the 3,544 delay minutes carriers reported here, and the remaining four split what is left.
- 69%Carrier
- 14%National Airspace System
- 10%Extreme weather
- 7%Late-arriving aircraft
The largest share of delay minutes, 69%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,453 of the 3,544 delay minutes reported here. The split is drawn from 3,544 delay minutes reported on DL 1624.
Cancellations sit at 2.47% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
6.2% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.
Every one of the 365 flights under DL 1624 in the data flew MEM to ATL. 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 1624
For a booking, read DL 1624 as 89.9% on time with 2.47% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- MEM to ATL, every carrier and departure
- ATL to MEM, the return direction
- Delta Air Lines 2778 on the same route84.9%
- Delta Air Lines 1700 on the same route78.9%
- Delta Air Lines 1666 on the same route91.2%
- Delta Air Lines 1625 on the same route91.0%
- Delta Air Lines 2071 on the same route92.5%
- Delta Air Lines 82 on the same route88.9%
- Memphis International (MEM) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) 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
- The best day of the week to fly, and why it is the second lever
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.