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Showing Alaska only (incl. its regional partners)All airlines ×
1,260 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 95% depart on time. After 4 pm it’s 3 in 4.

Best time to leave 6–7 am 93% arrive on time from ONT
Best single flight AS 607 ONT 06:02 → SEA 08:44 · 93% on time Avoid AS 654 ONT 12:04 → SEA 14:44 · 90% 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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ONT
95
83
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84
72
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59
78
% 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 607 ONT 06:02 SEA 08:44 93%
AS 654 ONT 12:04 SEA 14:44 90%

All 7 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 607 ONT 06:02 SEA 08:44 2h 42m 263 93% 0.8% 71 min
AS 654 ONT 12:04 SEA 14:44 2h 40m 279 90% 3.9% 44 min
AS 567 ONT 14:05 SEA 16:45 2h 40m 45 77% 2.2% 32 min
AS 625 ONT 16:03 SEA 18:52 2h 49m 28 71% 0.0% 42 min
AS 575 ONT 17:26 SEA 20:06 2h 40m 45 61% 2.2% 38 min
AS 592 ONT 19:41 SEA 22:30 2h 49m 24 71% 0.0% 66 min
AS 594 ONT 21:20 SEA 23:59 2h 39m 115 67% 0.0% 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 ONT SEA 2h 43m 83% 1.8% 1,260 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