Flight number record
DL 813
Delta Air Lines · Detroit to Phoenix
- Route
- DTW → PHX
- Departs
- 12:48
- Flights
- 301
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 813, check with Delta Air Lines.
DL 813 lands a B+, level with the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 301 flights, with a median arrival 1 minute early.
Key figures
On time
77.9%
Arrivals under 15 minutes late, of 298 completed flights
Avg delay
72 min
Across delayed arrivals only, not all flights
Cancelled
0.66%
National rate is 1.89%
1 hour+ late
8.7%
National rate is 8.3%
These figures cover 301 flights between September 2025 and August 2026. Beyond the headline rate, 8.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 813 flies
DL 813 flies DTW to PHX without a single fixed slot. Its most common scheduled departure was 12:48, used on 89 of 301 flights, with 12:47 (56 flights) and 12:30 (36 flights) next.
- Departs 12:4889 flights29.6%
- Departs 12:4756 flights18.6%
- Departs 12:3036 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 12:48 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 813 runs level with that at 77.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 813 next to DTW to PHX
Every carrier on DTW to PHX combined arrived on time 75.9% of the time across 2,374 flights, so DL 813 is 2 points ahead of it. Delta flew 1,333 flights on the same city pair under all its flight numbers, including this one, and those ran 74.6% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 813thin sample | 301 | 77.9% | 72 min | 0.66% | B+ |
| All Delta Air Lines on DTW–PHX | 1,333 | 74.6% | 64 min | 0.68% | C+ |
| All carriers on DTW–PHX | 2,374 | 75.9% | 84 min | 0.80% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 813 quarter by quarter
DL 813 did not run the same all year. Its best quarter was Apr–Jun 2026 at 80.0% on time and its weakest Jul–Sep 2026 at 69.4%, a swing of 11 points on roughly 100 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 flights—
- Oct–Dec 202590 flights76.4%
- Jan–Mar 202628 flights—
- Apr–Jun 202691 flights80.0%
- Jul–Sep 202662 flights69.4%
Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, DL 813 did best on Friday at 85.4% on time and worst on Sunday at 72.1%. Each day rests on about 43 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 813 runs when it is late
The 66 late arrivals split 20 under half an hour, 20 between 30 and 60 minutes, and 26 an hour or more.
- 15+ min early46 flights15.4%
- Within 15 min186 flights62.4%
- 15–29 min late20 flights6.7%
- 30–59 min late20 flights6.7%
- 1–2 hours late13 flights4.4%
- 2+ hours late13 flights4.4%
Scale runs 0% to 100%.
Share of 298 completed flights by arrival against schedule.
21 of 71 late departures made up the time and arrived on time, 30% of them. In the other direction, 16 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at PHX.
The worst days
Worst days for DL 813
The latest arrival of the period was on 23 May 2026, 4 hours 1 minute behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in May 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 23 May 2026 | 4 hours 1 minute | Late-arriving aircraft |
| 14 May 2026 | 3 hours 56 minutes | Carrier |
| 18 May 2026 | 3 hours 40 minutes | Carrier |
| 21 September 2025 | 3 hours 37 minutes | Carrier |
| 1 July 2026 | 3 hours 25 minutes | Late-arriving aircraft |
Delay causes
Why DL 813 runs late
Carrier accounts for 44% of the 4,748 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Carrier
- 41%Late-arriving aircraft
- 14%National Airspace System
- 1%Extreme weather
41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,748 reported delay minutes here, that single category outweighs weather by 41 to one. The split is drawn from 4,748 delay minutes reported on DL 813.
Cancellations are rare at 0.66%, 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
8.7% 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 a little over an hour, which a normal layover absorbs.
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 three other city pairs in the data, including PHX to DTW (72), TPA to LGA (62) and LGA to TPA (24), but none flew often enough under DL 813 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DTW to PHX only.
One caution: this is a thin sample. 301 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 813
For a booking, read DL 813 as 77.9% on time with 0.66% cancelled over 301 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DTW to PHX, every carrier and departure
- PHX to DTW, the return direction
- Delta Air Lines 1070 on the same route78.4%
- Delta Air Lines 2076 on the same route73.7%
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Phoenix Sky Harbor International (PHX) 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.