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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
12
13
14
15
16
17
18
19
20
21
22
23
SEA
94
98
94
91
93
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
Portland flights leaving SEA 12–1 pm: 1Close ×
AS 2181flown by Horizon SEA 12:05 PDX 13:06 1h 01m 52 60% 0.0% 35 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 (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