Flight number record

DL 936

Delta Air Lines · Seattle to Anchorage

Route: SEA → ANC
Departs: 23:15
Flights: 329
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 936, check with Delta Air Lines.

DL 936 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 about an hour behind schedule. That rests on 329 flights, with a median arrival 1 minute late.

The national on-time rate over the same period is 77.6%, so DL 936 runs 5 points behind the country as a whole. Across a thousand flights that is about 52 extra late arrivals.

On time

72.4%

Arrivals under 15 minutes late, of 326 completed flights

Avg delay

67 min

Across delayed arrivals only, not all flights

Cancelled

0.91%

National rate is 1.81%

1 hour+ late

6.4%

National rate is 8.1%

These figures cover 329 flights between July 2025 and June 2026. On-time means an arrival less than 15 minutes after the scheduled gate time, the same threshold the Department of Transportation uses in its own reports. Cancelled and diverted flights are excluded from the on-time rate and counted separately, which is why the cancellation column matters on its own.

Schedule

When DL 936 flies

DL 936 flies SEA to ANC without a single fixed slot. Its most common scheduled departure was 23:15, used on 74 of 329 flights, with 17:55 (44 flights) and 21:20 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 23:1574 flights22.5%
Departs 17:5544 flights13.4%
Departs 21:2036 flights10.9%

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 23:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 936 runs level with that at 72.4%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

DL 936 next to SEA to ANC

Every carrier on SEA to ANC combined arrived on time 75.2% of the time across 6,681 flights, so DL 936 is 3 points behind it. Delta flew 1,630 flights on the same city pair under all its flight numbers, including this one, and those ran 77.9% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 9 points.

DL 936 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 936thin sample	329	72.4%	67 min	0.91%	C+
All Delta Air Lines on SEA–ANC	1,630	77.9%	61 min	0.61%	B+
All carriers on SEA–ANC	6,681	75.2%	51 min	1.00%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 936 quarter by quarter

DL 936 did not run the same all year. Its best quarter was Jul–Sep 2025 at 83.6% on time and its weakest Jan–Mar 2026 at 66.7%, a swing of 17 points on roughly 82 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 202573 flights83.6%
Oct–Dec 202587 flights70.1%
Jan–Mar 202678 flights66.7%
Apr–Jun 202691 flights70.3%

Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 936 did best on Wednesday at 78.0% on time and worst on Friday at 64.6%. Each day rests on about 47 flights, so a gap of 13 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 936 runs late

One category carries most of the weight here. Carrier accounts for 52% of the 6,006 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
52%
Late-arriving aircraft
22%
National Airspace System
20%
Extreme weather
7%

The largest share of delay minutes, 52%, 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 3,121 of the 6,006 delay minutes reported here. The split is drawn from 6,006 delay minutes reported on DL 936.

Cancellations sit at 0.91% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

6.4% 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 about an hour, which a normal layover absorbs.

The 1,448 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

Every one of the 329 flights under DL 936 in the data flew SEA to ANC. 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. 329 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 936

For a booking, read DL 936 as 72.4% on time with 0.91% cancelled over 329 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