Flight number record
DL 2029
Delta Air Lines · Atlanta to Mobile
- Route
- ATL → MOB
- Departs
- 23:05
- Flights
- 275
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2029, check with Delta Air Lines.
DL 2029 lands a B, 4 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 275 flights, with a median arrival 12 minutes early.
Set against the rest of the country, DL 2029's record is 4 points better than the US average of 77.3%. That gap is worth roughly 40 fewer late arrivals for every thousand flights.
Key figures
On time
81.3%
Arrivals under 15 minutes late, of 267 completed flights
Avg delay
89 min
Across delayed arrivals only, not all flights
Cancelled
2.91%
National rate is 1.89%
1 hour+ late
9.7%
National rate is 8.3%
These figures cover 275 flights between September 2025 and August 2026. Beyond the headline rate, 9.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 2029 flies
DL 2029 flies ATL to MOB without a single fixed slot. Its most common scheduled departure was 23:05, used on 36 of 275 flights, with 23:00 (34 flights) and 22:34 (33 flights) next.
- Departs 23:0536 flights13.1%
- Departs 23:0034 flights12.4%
- Departs 22:3433 flights12.0%
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 23:05 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 2029 runs 11 points better at 81.3%. 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 2029 next to ATL to MOB
Every carrier on ATL to MOB combined arrived on time 79.2% of the time across 926 flights, so DL 2029 is 2 points ahead of it. Delta flew 780 flights on the same city pair under all its flight numbers, including this one, and those ran 81.5% on time. Across its whole network Delta Air Lines managed 81.1%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2029thin sample | 275 | 81.3% | 89 min | 2.91% | B |
| All Delta Air Lines on ATL–MOB | 780 | 81.5% | 70 min | 2.18% | B |
| All carriers on ATL–MOB | 926 | 79.2% | 76 min | 1.94% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2029 quarter by quarter
DL 2029 did not run the same all year. Its best quarter was Oct–Dec 2025 at 92.1% on time and its weakest Jul–Sep 2026 at 61.3%, a swing of 31 points on roughly 55 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 flights86.7%
- Oct–Dec 202538 flights92.1%
- Jan–Mar 202686 flights83.1%
- Apr–Jun 202659 flights90.7%
- Jul–Sep 202662 flights61.3%
Scale runs 55% to 100%.
By weekday, DL 2029 did best on Tuesday at 90.0% on time and worst on Friday at 68.4%. Each day rests on about 39 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2029 runs when it is late
DL 2029 often beats the schedule: 98 of 267 completed flights, 37%, arrived 15 minutes or more early. When DL 2029 is late it tends to be very late: 26 of its 50 late arrivals were an hour or more behind, and 8 were two hours or more.
- 15+ min early98 flights36.7%
- Within 15 min119 flights44.6%
- 15–29 min late14 flights5.2%
- 30–59 min late10 flights3.7%
- 1–2 hours late18 flights6.7%
- 2+ hours late8 flights3.0%
Scale runs 0% to 100%.
Share of 267 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 56 departures that left 15 minutes late or more, only 6 made it up before arrival. No flight that left on time arrived late.
The worst days
Worst days for DL 2029
The latest arrival of the period was on 27 February 2026, 10 hours 42 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 27 February 2026 | 10 hours 42 minutes | National Airspace System |
| 25 February 2026 | 8 hours 29 minutes | Carrier |
| 11 July 2026 | 4 hours 27 minutes | Late-arriving aircraft |
| 30 August 2026 | 2 hours 52 minutes | Carrier |
| 14 June 2026 | 2 hours 49 minutes | Carrier |
Delay causes
Why DL 2029 runs late
Carrier accounts for 47% of the 4,450 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Carrier
- 30%Late-arriving aircraft
- 18%National Airspace System
- 5%Extreme weather
The largest share of delay minutes, 47%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,110 of the 4,450 delay minutes reported here. The split is drawn from 4,450 delay minutes reported on DL 2029.
Cancellations run at 2.91%, against 1.89% nationally. That is roughly one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
9.7% 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 PHL to SLC (17) and SNA to SEA (16), but none flew often enough under DL 2029 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to MOB only.
One caution: this is a thin sample. 275 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 2029
For a booking, the cancellation rate is the figure to plan around on DL 2029: 2.91% of its 275 scheduled flights did not operate. A late arrival costs an hour and a half, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- ATL to MOB, every carrier and departure
- MOB to ATL, the return direction
- 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
- 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.