Flight number record
DL 929
Delta Air Lines · Phoenix to Atlanta
- Route
- PHX → ATL
- Departs
- 23:59
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 929, check with Delta Air Lines.
DL 929 lands a B+, 7 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about 50 minutes on average. That rests on 365 flights, with a median arrival 8 minutes early.
Set against the rest of the country, DL 929's record is 7 points better than the US average of 77.3%. That gap is worth roughly 66 fewer late arrivals for every thousand flights.
Key figures
On time
83.9%
Arrivals under 15 minutes late, of 361 completed flights
Avg delay
50 min
Across delayed arrivals only, not all flights
Cancelled
0.82%
National rate is 1.89%
1 hour+ late
3.6%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 8 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 929 flies
DL 929 flies PHX to ATL without a single fixed slot. Its most common scheduled departure was 23:59, used on 88 of 365 flights, with 23:55 (58 flights) and 23:50 (45 flights) next.
- Departs 23:5988 flights24.1%
- Departs 23:5558 flights15.9%
- Departs 23:5045 flights12.3%
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 23:59 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 929 runs 14 points better at 83.9%. 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 929 next to PHX to ATL
Every carrier on PHX to ATL combined arrived on time 80.7% of the time across 3,696 flights, so DL 929 is 3 points ahead of it. Delta flew 2,283 flights on the same city pair under all its flight numbers, including this one, and those ran 85.4% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 929 | 365 | 83.9% | 50 min | 0.82% | B+ |
| All Delta Air Lines on PHX–ATL | 2,283 | 85.4% | 102 min | 1.01% | A |
| All carriers on PHX–ATL | 3,696 | 80.7% | 78 min | 0.87% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 929 quarter by quarter
DL 929 did not run the same all year. Its best quarter was Apr–Jun 2026 at 90.1% on time and its weakest Jul–Sep 2026 at 73.3%, a swing of 17 points on roughly 73 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 flights90.0%
- Oct–Dec 202592 flights83.7%
- Jan–Mar 202690 flights83.0%
- Apr–Jun 202691 flights90.1%
- Jul–Sep 202662 flights73.3%
Scale runs 65% to 95%.
By weekday, DL 929 did best on Thursday at 92.3% on time and worst on Friday at 75.0%. Each day rests on about 52 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 929 runs when it is late
DL 929 often beats the schedule: 102 of 361 completed flights, 28%, arrived 15 minutes or more early. The 58 late arrivals split 23 under half an hour, 22 between 30 and 60 minutes, and 13 an hour or more.
- 15+ min early102 flights28.3%
- Within 15 min201 flights55.7%
- 15–29 min late23 flights6.4%
- 30–59 min late22 flights6.1%
- 1–2 hours late9 flights2.5%
- 2+ hours late4 flights1.1%
Scale runs 0% to 100%.
Share of 361 completed flights by arrival against schedule.
16 of 71 late departures made up the time and arrived on time, 23% of them. Only 3 left on time and still arrived late.
The worst days
Worst days for DL 929
The latest arrival of the period was on 7 December 2025, 4 hours 33 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 | 4 hours 33 minutes | Late-arriving aircraft |
| 6 March 2026 | 3 hours 32 minutes | Late-arriving aircraft |
| 19 August 2026 | 2 hours 54 minutes | Extreme weather |
| 8 February 2026 | 2 hours 16 minutes | Carrier |
| 2 May 2026 | 1 hour 58 minutes | Late-arriving aircraft |
Delay causes
Why DL 929 runs late
Late-arriving aircraft accounts for 66% of the 2,887 delay minutes carriers reported here, and the remaining four split what is left.
- 66%Late-arriving aircraft
- 22%Carrier
- 7%Extreme weather
- 5%National Airspace System
66% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,887 reported delay minutes here, that single category outweighs weather by 10 to one. The split is drawn from 2,887 delay minutes reported on DL 929.
Cancellations are rare at 0.82%, 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
Badly late arrivals are rare here: only 3.6% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 1,587 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 365 flights under DL 929 in the data flew PHX 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 929
For a booking, read DL 929 as 83.9% on time with 0.82% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- PHX to ATL, every carrier and departure
- ATL to PHX, the return direction
- Delta Air Lines 918 on the same route94.7%
- Delta Air Lines 901 on the same route89.4%
- Delta Air Lines 796 on the same route78.5%
- Delta Air Lines 348 on the same route82.0%
- American Airlines 2391 on the same route70.0%
- Phoenix Sky Harbor International (PHX) 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
- 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.