2,060 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 3 in 4.

Best time to leave 6–7 am 93% arrive on time from SEA

Best single flight DL 812 SEA 05:30 → DTW 12:40 · 92% on time Avoid DL 1706 SEA 11:25 → DTW 18:41 · 79% 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).

SEA

% 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

Detroit flights leaving SEA 10–11 pm: 2Close ×


AS 343	SEA 22:22	DTW 05:41	4h 19m	51	86%	0.0%	42 min
AS 406	SEA 22:23	DTW 05:49	4h 26m	28	86%	0.0%	56 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.


Delta	1,517	87%	1.0%	68 min
Alaska	543	84%	0.2%	51 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 812	SEA 05:30	DTW 12:40	92%
DL 810	SEA 23:10	DTW 06:27	88%
DL 533	SEA 14:30	DTW 21:48	86%
AS 313	SEA 09:18	DTW 16:33	85%
DL 1706	SEA 11:25	DTW 18:41	79%

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.


Delta	SEA	DTW	4h 18m	87%	1.0%	1,517	Flying now
Alaska	SEA	DTW	4h 19m	84%	0.2%	543	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