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

Leave before 9 am: 93% depart on time. After 4 pm it’s 3 in 4.

Best time to leave 6–7 am 93% arrive on time from SEA

Best single flight UA 2135 SEA 07:05 → IAH 13:31 · 92% on time Avoid AS 438 SEA 10:52 → IAH 17:16 · 70% 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).

SEA

% 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

Houston flights leaving SEA 10–11 am: 1Close ×


AS 438	SEA 10:52	IAH 17:16	4h 24m	363	70%	0.6%	44 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.


United	1,238	87%	0.3%	82 min
Alaska	852	77%	0.6%	47 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.


UA 2135	SEA 07:05	IAH 13:31	92%
UA 2379	SEA 23:49	IAH 06:10	84%
AS 398	SEA 23:57	IAH 06:20	82%
AS 438	SEA 10:52	IAH 17:16	70%

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.


United	SEA	IAH	4h 26m	87%	0.3%	1,238	Flying now
Alaska	SEA	IAH	4h 25m	77%	0.6%	852	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