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6,557 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 93% depart on time. After 4 pm it’s 4 in 5.

Best time to leave 6–7 am 98% arrive on time from SEA
Best single flight DL 3953 SEA 07:30 → PDX 08:39 · 94% on time Avoid AS 498 SEA 21:28 → PDX 22:25 · 74% 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).

5
6
7
8
9
10
11
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18
19
20
21
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SEA
94
98
94
91
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91
80
79
88
88
82
88
83
82
81
84
82
68
78
% 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.
Delta (incl. SkyWest) 2,650 87% 0.3% 58 min
Alaska (incl. SkyWest, Horizon) 3,907 82% 0.8% 45 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 3953flown by SkyWest SEA 07:30 PDX 08:39 94%
DL 3997flown by SkyWest SEA 20:15 PDX 21:16 92%
DL 3818flown by SkyWest SEA 09:30 PDX 10:39 91%
DL 3802flown by SkyWest SEA 10:35 PDX 11:42 86%
DL 3918flown by SkyWest SEA 16:01 PDX 17:09 85%
· · ·
DL 3913flown by SkyWest SEA 20:59 PDX 22:02 85%
AS 498 SEA 21:28 PDX 22:25 74%
All 33 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 PDX 1h 03m 87% 0.3% 2,650 Flying now
Alaska SEA PDX 59m 82% 0.8% 3,907 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