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1,131 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 92% depart on time. After 4 pm it’s 77%.

Best time to leave 7–8 am 95% arrive on time from SEA
Best single flight AS 418 SEA 07:48 → MCI 13:21 · 89% on time Avoid AS 564 SEA 18:27 → MCI 23:59 · 77% 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
SEA
93
91
80
80
75
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
Kansas City flights leaving SEA 5–6 pm: 1Close ×
DL 2256 SEA 17:30 MCI 23:06 3h 36m 364 77% 1.6% 79 min

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.
Alaska 749 84% 0.5% 47 min
Delta 364 77% 1.6% 79 min
Southwest 18 – 0.0% 66 min

Dimmed: fewer than 150 flights in the year, too few to rank.

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 418 SEA 07:48 MCI 13:21 89%
DL 2256 SEA 17:30 MCI 23:06 77%
AS 564 SEA 18:27 MCI 23:59 77%
All 6 flights on this route →

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 MCI 3h 33m 84% 0.5% 749 Flying now
Delta SEA MCI 3h 36m 77% 1.6% 364 Flying now
Southwest SEA MCI – 39%few flights 0.0% 18 Not 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