Flight number record

DL 836

Delta Air Lines · Atlanta to Phoenix

Route: ATL → PHX
Departs: 16:59
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 836, check with Delta Air Lines.

DL 836 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 365 flights, with a median arrival right on schedule.

The national on-time rate over the same period is 77.6%, so DL 836 runs 5 points behind the country as a whole. Across a thousand flights that is about 54 extra late arrivals.

On time

72.2%

Arrivals under 15 minutes late, of 360 completed flights

Avg delay

75 min

Across delayed arrivals only, not all flights

Cancelled

1.10%

National rate is 1.81%

1 hour+ late

10.6%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. Beyond the headline rate, 10.6% 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 836 flies

DL 836 flies ATL to PHX without a single fixed slot. Its most common scheduled departure was 16:59, used on 93 of 365 flights, with 17:00 (61 flights) and 17:59 (41 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 16:5993 flights25.5%
Departs 17:0061 flights16.7%
Departs 17:5941 flights11.2%

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 16:59 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 836 runs level with that at 72.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 836 next to ATL to PHX

Every carrier on ATL to PHX combined arrived on time 75.4% of the time across 3,762 flights, so DL 836 is 3 points behind it. Delta flew 2,301 flights on the same city pair under all its flight numbers, including this one, and those ran 76.0% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 9 points.

DL 836 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 836	365	72.2%	75 min	1.10%	C
All Delta Air Lines on ATL–PHX	2,301	76.0%	59 min	0.87%	B+
All carriers on ATL–PHX	3,762	75.4%	63 min	0.72%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 836 quarter by quarter

Quarter by quarter DL 836 held fairly steady: 68.1% in Jul–Sep 2025, 74.2% in Oct–Dec 2025, 75.3% in Jan–Mar 2026 and 71.4% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights68.1%
Oct–Dec 202592 flights74.2%
Jan–Mar 202690 flights75.3%
Apr–Jun 202691 flights71.4%

Scale runs 60% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, DL 836 did best on Wednesday at 82.7% on time and worst on Sunday at 63.3%. Each day rests on about 52 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 836 runs late

One category carries most of the weight here. Carrier accounts for 55% of the 7,463 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
55%
Late-arriving aircraft
20%
National Airspace System
17%
Extreme weather
8%

The largest share of delay minutes, 55%, 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 4,115 of the 7,463 delay minutes reported here. The split is drawn from 7,463 delay minutes reported on DL 836.

Cancellations sit at 1.10% against a national 1.81%, which is ordinary. Diversions add another 0.27%.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.6% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

At 1,587 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.

Every one of the 365 flights under DL 836 in the data flew ATL to PHX. The number was not reused on any other city pair, which makes this a clean record of one route.

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.

What to do with this

Booking DL 836

For a booking, read DL 836 as 72.2% on time with 1.10% 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