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

No clear winner: Alaska’s SEA → BWI flights land within a few points of 85% on time whatever the hour.

Best time to leave 9–10 pm 89% arrive on time from SEA
Best single flight AS 378 SEA 09:03 → BWI 17:04 · 84% on time Avoid AS 344 SEA 22:20 → BWI 06:28 · 84% 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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SEA
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75
% 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 378 SEA 09:03 BWI 17:04 84%
AS 344 SEA 22:20 BWI 06:28 84%

All 4 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 378 SEA 09:03 BWI 17:04 5h 01m 337 84% 0.6% 47 min
AS 379 SEA 10:20 BWI 18:35 5h 15m 28 86% 0.0% 25 min
AS 781 SEA 21:36 BWI 05:41 5h 05m 51 90% 0.0% 23 min
AS 344 SEA 22:20 BWI 06:28 5h 08m 167 84% 0.6% 33 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 SEA BWI 5h 08m 85% 0.5% 599 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