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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 3–4 pm: 2Close ×
DL 4062flown by SkyWest PDX 15:26 SEA 16:40 1h 15m 110 89% 0.0% 51 min
AS 3408flown by SkyWest PDX 15:30 SEA 16:30 1h 00m 91 81% 2.2% 58 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