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Showing Alaska only (incl. its regional partners)All airlines ×
1,551 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 63%.

Best time to leave 7–8 am 94% arrive on time from DEN
Best single flight AS 643 DEN 06:02 → SEA 08:05 · 89% on time Avoid AS 535 DEN 16:36 → SEA 18:38 · 67% 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
21
DEN
89
97
90
88
81
80
74
58
69
63
66
54
64
% 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.

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.
AS 643 DEN 06:02 SEA 08:05 89%
AS 682 DEN 12:20 SEA 14:23 83%
AS 535 DEN 16:36 SEA 18:38 67%

All 10 Alaska 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.
AS 643 DEN 06:02 SEA 08:05 3h 03m 295 89% 0.0% 72 min
AS 317 DEN 08:40 SEA 10:42 3h 02m 52 84% 3.8% 40 min
AS 525 DEN 09:00 SEA 11:04 3h 04m 49 81% 4.1% 108 min
AS 682 DEN 12:20 SEA 14:23 3h 03m 232 83% 1.3% 49 min
AS 381 DEN 12:55 SEA 14:53 2h 58m 52 77% 0.0% 38 min
AS 1332 DEN 14:57 SEA 17:00 3h 03m 48 81% 2.1% 54 min
AS 535 DEN 16:36 SEA 18:38 3h 02m 216 67% 0.5% 72 min
AS 249 DEN 18:15 SEA 20:17 3h 02m 52 58% 0.0% 54 min
AS 785 DEN 19:21 SEA 21:29 3h 08m 134 70% 0.7% 43 min
AS 493 DEN 21:08 SEA 23:10 3h 02m 14 57% 0.0% 104 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 DEN SEA 3h 03m 76% 0.8% 1,551 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