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Showing Alaska only (incl. its regional partners)All airlines ×
554 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: Alaska’s RDU → SEA flights land within a few points of 3 in 4 on time whatever the hour.

Best time to leave 7–8 am 79% arrive on time from RDU
Best single flight AS 572 RDU 17:34 → SEA 20:33 · 72% 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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RDU
80
71
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79
% 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 572 RDU 17:34 SEA 20:33 72%

All 3 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 670 RDU 07:02 SEA 09:56 5h 54m 131 74% 0.0% 55 min
AS 434 RDU 07:42 SEA 10:40 5h 58m 28 86% 0.0% 36 min
AS 572 RDU 17:34 SEA 20:33 5h 59m 329 72% 1.8% 50 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 RDU SEA 5h 58m 75% 1.6% 554 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