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Showing Alaska only (incl. its regional partners)All airlines ×
1,221 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

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

Best time to leave 7–8 am 92% arrive on time from SEA
Best single flight AS 460 SEA 15:36 → BOS 23:59 · 80% on time Avoid AS 306 SEA 08:23 → BOS 16:53 · 76% 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
11
12
13
14
15
16
17
18
19
20
21
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23
SEA
87
78
82
56
72
73
80
% 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 460 SEA 15:36 BOS 23:59 80%
AS 536 SEA 23:18 BOS 07:40 78%
AS 306 SEA 08:23 BOS 16:53 76%

All 6 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 1505 SEA 06:03 BOS 14:23 5h 20m 18 100% 0.0% –
AS 330 SEA 07:55 BOS 16:32 5h 37m 28 93% 0.0% 60 min
AS 306 SEA 08:23 BOS 16:53 5h 30m 365 76% 1.4% 58 min
AS 219 SEA 10:13 BOS 18:41 5h 28m 52 58% 0.0% 58 min
AS 460 SEA 15:36 BOS 23:59 5h 23m 359 80% 1.1% 46 min
AS 536 SEA 23:18 BOS 07:40 5h 22m 240 78% 0.8% 38 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 BOS 5h 27m 76% 1.0% 1,221 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