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Showing Alaska only (incl. its regional partners)All airlines ×
1,222 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 88% depart on time. After 4 pm it’s 7 in 10.

Best time to leave 4–5 pm 83% arrive on time from BOS
Best single flight AS 537 BOS 09:01 → SEA 12:18 · 84% on time Avoid AS 459 BOS 07:03 → SEA 10:26 · 75% 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).

7
8
9
10
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14
15
16
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19
BOS
88
87
79
61
73
55
% 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 537 BOS 09:01 SEA 12:18 84%
AS 459 BOS 07:03 SEA 10:26 75%

All 8 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 459 BOS 07:03 SEA 10:26 6h 23m 364 75% 0.8% 43 min
AS 338 BOS 09:00 SEA 12:23 6h 23m 52 80% 1.9% 50 min
AS 537 BOS 09:01 SEA 12:18 6h 17m 184 84% 1.1% 43 min
AS 1506 BOS 15:26 SEA 18:45 6h 19m 18 83% 0.0% 26 min
AS 260 BOS 16:48 SEA 20:10 6h 22m 28 75% 0.0% 59 min
AS 304 BOS 17:56 SEA 21:26 6h 30m 71 66% 0.0% 53 min
AS 306 BOS 19:11 SEA 22:27 6h 16m 116 60% 1.7% 48 min
AS 1337 BOS 19:44 SEA 23:07 6h 23m 44 53% 2.3% 60 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 BOS SEA 6h 22m 72% 1.1% 1,222 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