Flight number record
DL 947
Delta Air Lines · Phoenix to Detroit
- Route
- PHX → DTW
- Departs
- 06:00
- Flights
- 349
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 947, check with Delta Air Lines.
DL 947 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 a little over an hour. That rests on 349 flights, with a median arrival 8 minutes early.
Set against the rest of the country, DL 947's record is 13 points better than the US average of 77.3%. That gap is worth roughly 129 fewer late arrivals for every thousand flights.
Key figures
On time
90.2%
Arrivals under 15 minutes late, of 347 completed flights
Avg delay
80 min
Across delayed arrivals only, not all flights
Cancelled
0.29%
National rate is 1.89%
1 hour+ late
3.2%
National rate is 8.3%
These figures cover 349 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 947 flies
DL 947 flies PHX to DTW without a single fixed slot. Its most common scheduled departure was 06:00, used on 121 of 349 flights, with 07:00 (116 flights) and 06:10 (112 flights) next.
- Departs 06:00121 flights34.7%
- Departs 07:00116 flights33.2%
- Departs 06:10112 flights32.1%
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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 947 runs level with that at 90.2%. 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 947 next to PHX to DTW
Every carrier on PHX to DTW combined arrived on time 79.5% of the time across 2,377 flights, so DL 947 is 11 points ahead of it. Delta flew 1,332 flights on the same city pair under all its flight numbers, including this one, and those ran 83.3% 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 947thin sample | 349 | 90.2% | 80 min | 0.29% | A+ |
| All Delta Air Lines on PHX–DTW | 1,332 | 83.3% | 81 min | 0.98% | B+ |
| All carriers on PHX–DTW | 2,377 | 79.5% | 82 min | 0.97% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 947 quarter by quarter
DL 947 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jan–Mar 2026 at 84.9%, a swing of 12 points on roughly 70 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 flights96.7%
- Oct–Dec 202580 flights92.5%
- Jan–Mar 202686 flights84.9%
- Apr–Jun 202691 flights93.3%
- Jul–Sep 202662 flights86.9%
Scale runs 75% to 100%.
By weekday, DL 947 did best on Thursday at 98.0% on time and worst on Sunday at 85.4%. Each day rests on about 50 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 947 runs when it is late
DL 947 often beats the schedule: 90 of 347 completed flights, 26%, arrived 15 minutes or more early. The 34 late arrivals split 16 under half an hour, 7 between 30 and 60 minutes, and 11 an hour or more.
- 15+ min early90 flights25.9%
- Within 15 min223 flights64.3%
- 15–29 min late16 flights4.6%
- 30–59 min late7 flights2.0%
- 1–2 hours late7 flights2.0%
- 2+ hours late4 flights1.2%
Scale runs 0% to 100%.
Share of 347 completed flights by arrival against schedule.
4 of 28 late departures made up the time and arrived on time, 14% of them. 10 flights left on time and still arrived late.
The worst days
Worst days for DL 947
The latest arrival of the period was on 8 February 2026, 13 hours 46 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 8 February 2026 | 13 hours 46 minutes | Carrier |
| 10 May 2026 | 5 hours 38 minutes | Carrier |
| 20 July 2026 | 4 hours 7 minutes | Carrier |
| 25 January 2026 | 3 hours 15 minutes | Carrier |
| 5 December 2025 | 1 hour 18 minutes | National Airspace System |
Delay causes
Why DL 947 runs late
Carrier accounts for 89% of the 2,717 delay minutes carriers reported here, and the remaining four split what is left.
- 89%Carrier
- 11%National Airspace System
The largest share of delay minutes, 89%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,409 of the 2,717 delay minutes reported here. The split is drawn from 2,717 delay minutes reported on DL 947.
Cancellations are rare at 0.29%, 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 3.2% 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 1,671 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.
The same number turns up on one other city pair in the data, including LAS to ATL (16), but none flew often enough under DL 947 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to PHX to DTW only.
One caution: this is a thin sample. 349 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 947
For a booking, DL 947 has one of the better records a US domestic flight can show: 90.2% on time and 0.29% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- PHX to DTW, every carrier and departure
- DTW to PHX, the return direction
- Delta Air Lines 1070 on the same route82.6%
- Phoenix Sky Harbor International (PHX) delay statistics
- Detroit Metropolitan Wayne County (DTW) 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
- Worst months to fly in the US, ranked by the data
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.