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2,064 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: airlines and hours on this route all land within a few points of 3 in 4 on time.

Best time to leave 3–4 pm 96% arrive on time from DTW
Best single flight DL 728 DTW 12:31 → SEA 14:30 · 78% on time Avoid DL 565 DTW 20:34 → SEA 22:34 · 64% on time

Time of day × airport

Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).

6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
DTW
87
67
87
85
82
80
75
85
68
62
% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55

Pick an hour to see this route’s flights leaving then.

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.
Alaska 544 76% 0.2% 48 min
Delta 1,520 74% 0.9% 57 min

Flights, best and worst

Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.
DL 728 DTW 12:31 SEA 14:30 78%
DL 734 DTW 08:30 SEA 10:31 76%
AS 313 DTW 17:31 SEA 19:33 73%
DL 944 DTW 16:46 SEA 18:45 72%
DL 565 DTW 20:34 SEA 22:34 64%

All 8 flights in the current schedule

Every flight that flew in the Jun 6 – Jul 31, 2026 schedule, with its record over Aug 2025 – Jul 2026. Times are local. Click a column to sort.
DL 814 DTW 06:00 SEA 07:55 4h 55m 65 91% 1.5% 66 min
AS 344 DTW 07:01 SEA 09:00 4h 59m 51 71% 0.0% 41 min
AS 381 DTW 07:09 SEA 09:10 5h 01m 114 88% 0.0% 46 min
DL 734 DTW 08:30 SEA 10:31 5h 01m 365 76% 1.6% 43 min
DL 728 DTW 12:31 SEA 14:30 4h 59m 364 78% 0.8% 50 min
DL 944 DTW 16:46 SEA 18:45 4h 59m 327 72% 0.0% 45 min
AS 313 DTW 17:31 SEA 19:33 5h 02m 327 73% 0.3% 45 min
DL 565 DTW 20:34 SEA 22:34 5h 00m 335 64% 0.9% 79 min

Nonstops by airline and airport

Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.
Alaska DTW SEA 5h 01m 76% 0.2% 544 Flying now
Delta DTW SEA 4h 59m 74% 0.9% 1,520 Flying now
Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON