Flight number record
DL 936
Delta Air Lines · Seattle to Anchorage
- Route
- SEA → ANC
- Departs
- 21:20
- Flights
- 348
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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+. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 348 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so DL 936 runs 4 points behind the country as a whole. Across a thousand flights that is about 43 extra late arrivals.
Key figures
On time
73.0%
Arrivals under 15 minutes late, of 345 completed flights
Avg delay
68 min
Across delayed arrivals only, not all flights
Cancelled
0.86%
National rate is 1.89%
1 hour+ late
7.2%
National rate is 8.3%
These figures cover 348 flights between September 2025 and August 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.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When DL 936 flies
DL 936 flies SEA to ANC without a single fixed slot. Its most common scheduled departure was 21:20, used on 98 of 348 flights, with 23:15 (73 flights) and 17:55 (44 flights) next.
- Departs 21:2098 flights28.2%
- Departs 23:1573 flights21.0%
- Departs 17:5544 flights12.6%
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 21:20 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 936 runs 3 points better at 73.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
DL 936 next to SEA to ANC
Every carrier on SEA to ANC combined arrived on time 76.5% of the time across 6,619 flights, so DL 936 is 4 points behind it. Delta flew 1,609 flights on the same city pair under all its flight numbers, including this one, and those ran 77.5% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 936thin sample | 348 | 73.0% | 68 min | 0.86% | C+ |
| All Delta Air Lines on SEA–ANC | 1,609 | 77.5% | 62 min | 0.62% | B+ |
| All carriers on SEA–ANC | 6,619 | 76.5% | 50 min | 0.71% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | 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 90.0% on time and its weakest Jan–Mar 2026 at 66.7%, a swing of 23 points on roughly 70 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 flights90.0%
- Oct–Dec 202587 flights70.1%
- Jan–Mar 202678 flights66.7%
- Apr–Jun 202691 flights70.3%
- Jul–Sep 202662 flights80.6%
Scale runs 60% to 95%.
By weekday, DL 936 ranged from 69.4% on Friday to 80.9% on Wednesday. With about 50 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 936 runs when it is late
The 93 late arrivals split 39 under half an hour, 29 between 30 and 60 minutes, and 25 an hour or more.
- 15+ min early64 flights18.6%
- Within 15 min188 flights54.5%
- 15–29 min late39 flights11.3%
- 30–59 min late29 flights8.4%
- 1–2 hours late15 flights4.3%
- 2+ hours late10 flights2.9%
Scale runs 0% to 100%.
Share of 345 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 71 departures that left 15 minutes late or more, only 7 made it up before arrival. In the other direction, 29 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 ANC.
The worst days
Worst days for DL 936
The latest arrival of the period was on 28 September 2025, 9 hours 48 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 28 September 2025 | 9 hours 48 minutes | Carrier |
| 6 November 2025 | 7 hours 49 minutes | Carrier |
| 26 September 2025 | 7 hours 34 minutes | Carrier |
| 14 December 2025 | 6 hours 34 minutes | Extreme weather |
| 20 March 2026 | 4 hours 52 minutes | Carrier |
Delay causes
Why DL 936 runs late
Carrier accounts for 52% of the 6,321 delay minutes carriers reported here, and the remaining four split what is left.
- 52%Carrier
- 21%Late-arriving aircraft
- 20%National Airspace System
- 7%Extreme weather
The largest share of delay minutes, 52%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,312 of the 6,321 delay minutes reported here. The split is drawn from 6,321 delay minutes reported on DL 936.
Cancellations are rare at 0.86%, below the national 1.89% 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
7.2% 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 a little over 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.
Every one of the 348 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. 348 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 73.0% on time with 0.86% cancelled over 348 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SEA to ANC, every carrier and departure
- ANC to SEA, the return direction
- Delta Air Lines 922 on the same route78.9%
- Delta Air Lines 928 on the same route72.6%
- Alaska Airlines 99 on the same route75.2%
- Alaska Airlines 83 on the same route70.4%
- Seattle-Tacoma International (SEA) 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
- The best time of day to fly, according to 7.05 million flight records
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.