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2,090 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 73%.

Best time to leave 6–7 am 94% arrive on time from IAH
Best single flight AS 453 IAH 06:02 → SEA 08:40 · 88% on time Avoid AS 439 IAH 14:38 → SEA 17:21 · 72% 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).

6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
IAH
96
84
93
88
84
87
78
69
65
87
% 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
Seattle flights leaving IAH 6–7 am: 1Close ×
AS 453 IAH 06:02 SEA 08:40 4h 38m 344 88% 0.9% 37 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 852 81% 0.6% 52 min
United 1,238 79% 0.2% 55 min

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 453 IAH 06:02 SEA 08:40 88%
UA 2456 IAH 19:55 SEA 22:42 73%
AS 439 IAH 14:38 SEA 17:21 72%
All 10 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 IAH SEA 4h 43m 81% 0.6% 852 Flying now
United IAH SEA 4h 48m 79% 0.2% 1,238 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