Flight number record

DL 1070

Delta Air Lines · Detroit to Phoenix

Route: DTW → PHX
Departs: 08:35
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1070, check with Delta Air Lines.

DL 1070 lands a B+, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 365 flights, with a median arrival 3 minutes early.

On time

81.0%

Arrivals under 15 minutes late, of 363 completed flights

Avg delay

56 min

Across delayed arrivals only, not all flights

Cancelled

0.55%

National rate is 1.81%

1 hour+ late

4.7%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 3 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 1070 flies

DL 1070 flies DTW to PHX without a single fixed slot. Its most common scheduled departure was 08:35, used on 131 of 365 flights, with 08:45 (73 flights) and 08:55 (55 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:35131 flights35.9%
Departs 08:4573 flights20.0%
Departs 08:5555 flights15.1%

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 08:35 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 1070 runs 3 points worse at 81.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 1070 next to DTW to PHX

Every carrier on DTW to PHX combined arrived on time 76.6% of the time across 2,425 flights, so DL 1070 is 4 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 74.7% on time. Across its whole network Delta Air Lines managed 81.6%, close to this flight's figure.

DL 1070 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1070	365	81.0%	56 min	0.55%	B+
All Delta Air Lines on DTW–PHX	1,333	74.7%	64 min	0.53%	C+
All carriers on DTW–PHX	2,425	76.6%	80 min	0.74%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	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 96.7% on time and its weakest Oct–Dec 2025 at 69.6%, a swing of 27 points on roughly 91 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 202592 flights96.7%
Oct–Dec 202592 flights69.6%
Jan–Mar 202690 flights76.4%
Apr–Jun 202691 flights81.1%

Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1070 did best on Thursday at 88.5% on time and worst on Tuesday at 73.6%. Each day rests on about 52 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1070 runs late

One category carries most of the weight here. Carrier accounts for 68% of the 3,874 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.

Carrier
68%
National Airspace System
26%
Extreme weather
4%
Late-arriving aircraft
2%

The largest share of delay minutes, 68%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,626 of the 3,874 delay minutes reported here. The split is drawn from 3,874 delay minutes reported on DL 1070.

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 4.7% 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 1,671 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, 86.0% 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.

Other routes flown as DL 1070
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
PHX to DTWthin sample	304	86.0%	84 min	0.33%	A+

What to do with this

Booking DL 1070

For a booking, read DL 1070 as 81.0% on time with 0.55% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular 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