Flight number record

DL 813

Delta Air Lines · Detroit to Phoenix

Route: DTW → PHX
Departs: 12:48
Flights: 301
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 813, check with Delta Air Lines.

DL 813 lands a B+, 2 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 a little over an hour on average. That is a workable record, not a spotless one. That rests on 301 flights, with a median arrival 1 minute early.

On time

79.5%

Arrivals under 15 minutes late, of 297 completed flights

Avg delay

71 min

Across delayed arrivals only, not all flights

Cancelled

0.66%

National rate is 1.81%

1 hour+ late

8.1%

National rate is 8.1%

These figures cover 301 flights between July 2025 and June 2026. Beyond the headline rate, 8.1% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

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 83 of 301 flights, with 12:40 (37 flights) and 12:30 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 12:4883 flights27.6%
Departs 12:4037 flights12.3%
Departs 12:3036 flights12.0%

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 12:48 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 813 runs level with that at 79.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 813 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 813 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 74.7% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 2 points.

DL 813 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 813thin sample	301	79.5%	71 min	0.66%	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 813 quarter by quarter

Quarter by quarter DL 813 held fairly steady: 80.0% in Jul–Sep 2025, 76.4% in Oct–Dec 2025 and 80.0% in Apr–Jun 2026. A spread of 4 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights80.0%
Oct–Dec 202590 flights76.4%
Jan–Mar 202628 flights—
Apr–Jun 202691 flights80.0%

Scale runs 70% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, DL 813 did best on Wednesday at 86.0% on time and worst on Monday at 69.0%. Each day rests on about 43 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 813 runs late

One category carries most of the weight here. Carrier accounts for 47% of the 4,330 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
47%
Late-arriving aircraft
37%
National Airspace System
14%
Extreme weather
2%

37% 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 4,330 reported delay minutes here, that single category outweighs weather by 23 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 4,330 delay minutes reported on DL 813.

Cancellations are rare at 0.66%, 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

8.1% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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 79.5% on time with 0.66% cancelled over 301 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