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6,559 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 85% on time.

Best time to leave 5–6 am 95% arrive on time from PDX
Best single flight DL 4008 PDX 05:30 → SEA 06:41 · 95% on time Avoid AS 3431 PDX 10:35 → SEA 11:43 · 81% 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).

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PDX
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% 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 PDX 5–6 am: 2Close ×
AS 2431flown by Horizon PDX 05:00 SEA 05:53 53m 52 94% 1.9% 54 min
DL 4008flown by SkyWest PDX 05:30 SEA 06:41 1h 11m 208 95% 0.0% 159 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) 2,651 89% 0.3% 59 min
Alaska (incl. SkyWest, Horizon) 3,908 83% 1.0% 50 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 4008flown by SkyWest PDX 05:30 SEA 06:41 95%
AS 499 PDX 06:19 SEA 07:17 93%
DL 3818flown by SkyWest PDX 11:20 SEA 12:36 91%
DL 3802flown by SkyWest PDX 12:23 SEA 13:34 87%
DL 3918flown by SkyWest PDX 17:50 SEA 19:05 86%
· · ·
AS 2190flown by Horizon PDX 21:35 SEA 22:34 86%
DL 3953flown by SkyWest PDX 09:30 SEA 10:55 85%
AS 3431flown by SkyWest PDX 10:35 SEA 11:43 81%
All 31 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 PDX SEA 1h 11m 89% 0.3% 2,651 Flying now
Alaska PDX SEA 1h 03m 83% 1.0% 3,908 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