Flight number record
DL 1070
Delta Air Lines · Detroit to Phoenix
- Route
- DTW → PHX
- Departs
- 08:35
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1070, check with Delta Air Lines.
DL 1070 lands a B, about a point 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 about an hour on average. That rests on 365 flights, with a median arrival 2 minutes early.
Key figures
On time
78.4%
Arrivals under 15 minutes late, of 361 completed flights
Avg delay
57 min
Across delayed arrivals only, not all flights
Cancelled
1.10%
National rate is 1.89%
1 hour+ late
6.1%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 2 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 1070 flies
DL 1070 flies DTW to PHX without a single fixed slot. Its most common scheduled departure was 08:35, used on 104 of 365 flights, with 08:55 (84 flights) and 08:45 (79 flights) next.
- Departs 08:35104 flights28.5%
- Departs 08:5584 flights23.0%
- Departs 08:4579 flights21.6%
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 08:35 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 1070 runs 6 points worse at 78.4%. 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 1070 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 1070 is 3 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 1070 | 365 | 78.4% | 57 min | 1.10% | 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 1070 quarter by quarter
DL 1070 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Oct–Dec 2025 at 69.6%, a swing of 24 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 flights93.3%
- Oct–Dec 202592 flights69.6%
- Jan–Mar 202690 flights76.4%
- Apr–Jun 202691 flights81.1%
- Jul–Sep 202662 flights83.3%
Scale runs 60% to 100%.
By weekday, DL 1070 did best on Thursday at 86.5% on time and worst on Tuesday at 67.3%. Each day rests on about 52 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1070 runs when it is late
The 78 late arrivals split 26 under half an hour, 30 between 30 and 60 minutes, and 22 an hour or more.
- 15+ min early66 flights18.3%
- Within 15 min217 flights60.1%
- 15–29 min late26 flights7.2%
- 30–59 min late30 flights8.3%
- 1–2 hours late14 flights3.9%
- 2+ hours late8 flights2.2%
Scale runs 0% to 100%.
Share of 361 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 52 departures that left 15 minutes late or more, only 4 made it up before arrival. In the other direction, 30 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 1070
The latest arrival of the period was on 12 December 2025, 5 hours 45 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 12 December 2025 | 5 hours 45 minutes | Carrier |
| 11 January 2026 | 3 hours 40 minutes | Carrier |
| 26 January 2026 | 3 hours 24 minutes | Carrier |
| 28 February 2026 | 2 hours 55 minutes | Carrier |
| 11 October 2025 | 2 hours 54 minutes | Carrier |
Delay causes
Why DL 1070 runs late
Carrier accounts for 67% of the 4,472 delay minutes carriers reported here, and the remaining four split what is left.
- 67%Carrier
- 24%National Airspace System
- 5%Late-arriving aircraft
- 4%Extreme weather
The largest share of delay minutes, 67%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,991 of the 4,472 delay minutes reported here. The split is drawn from 4,472 delay minutes reported on DL 1070.
Cancellations sit at 1.10% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
6.1% 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 about 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.
DL 1070 is not only a DTW to PHX flight. It also flew PHX to DTW (304 flights, 82.6% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| PHX to DTWthin sample | 304 | 82.6% | 87 min | 1.32% | B |
What to do with this
Booking DL 1070
For a booking, read DL 1070 as 78.4% on time with 1.10% cancelled over 365 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 2076 on the same route73.7%
- Delta Air Lines 813 on the same route77.9%
- 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
- 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.