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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
Seattle flights leaving DTW 7–8 am: 2Close ×
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

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 on this route →

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