Flight number record

DL 929

Delta Air Lines · Phoenix to Atlanta

Route: PHX → ATL
Departs: 23:59
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 929, check with Delta Air Lines.

DL 929 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 50 minutes. That rests on 365 flights, with a median arrival 9 minutes early.

Set against the rest of the country, DL 929's record is 8 points better than the US average of 77.6%. That gap is worth roughly 83 fewer late arrivals for every thousand flights.

On time

85.9%

Arrivals under 15 minutes late, of 362 completed flights

Avg delay

50 min

Across delayed arrivals only, not all flights

Cancelled

0.55%

National rate is 1.81%

1 hour+ late

3.3%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 9 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.

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 144 of 365 flights, with 23:55 (58 flights) and 23:53 (42 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 23:59144 flights39.5%
Departs 23:5558 flights15.9%
Departs 23:5342 flights11.5%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 70.5%, and DL 929 runs 15 points better at 85.9%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

DL 929 next to PHX to ATL

Every carrier on PHX to ATL combined arrived on time 82.7% of the time across 3,764 flights, so DL 929 is 3 points ahead of it. Delta flew 2,303 flights on the same city pair under all its flight numbers, including this one, and those ran 87.0% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 4 points.

DL 929 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 929	365	85.9%	50 min	0.55%	A+
All Delta Air Lines on PHX–ATL	2,303	87.0%	97 min	0.91%	A+
All carriers on PHX–ATL	3,764	82.7%	75 min	0.72%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 929 quarter by quarter

Quarter by quarter DL 929 held fairly steady: 86.8% in Jul–Sep 2025, 83.7% in Oct–Dec 2025, 83.0% in Jan–Mar 2026 and 90.1% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights86.8%
Oct–Dec 202592 flights83.7%
Jan–Mar 202690 flights83.0%
Apr–Jun 202691 flights90.1%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 929 ranged from 78.8% on Friday to 90.2% 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.

Delay causes

Why DL 929 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 70% of the 2,558 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
70%
Carrier
23%
National Airspace System
4%
Extreme weather
3%

70% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 2,558 reported delay minutes here, that single category outweighs weather by 20 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 2,558 delay minutes reported on DL 929.

Cancellations are rare at 0.55%, below the national 1.81% 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 3.3% land an hour or more behind schedule, against 8.1% 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, DL 929 has one of the better records a US domestic flight can show: 85.9% on time and 0.55% cancelled. That is a base rate, not a promise about any single day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures