Home / Routes / KIAH → KSEA2,572 scheduled

The route from George Bush Intercontinental Houston Airport (KIAH) in Houston to Seattle Tacoma International Airport (KSEA) in Seattle. SkyMeter tracks roughly 2,572 scheduled flights on this route across 10 carriers. The most active operator is UAL (UAL). Average block time is 4h 25m. Departures average 34 minutes off schedule, with 65% running more than 15 minutes late. The most common aircraft on this route is the BOEING Boeing 737-800.

Scheduled
2,572
last 494 days
ADS-B observed
541
Airlines
10
Avg dep delay
34m
Late >15 min
64.9%
Cancel rate
0.74%

Recent observed flights

From ADS-B trace data

2026-09-08 19:50  →  2026-09-08 23:57  ·  4h 6m
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2026-09-08 17:17  →  2026-09-08 21:21  ·  4h 3m
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2026-09-08 15:23  →  2026-09-08 19:29  ·  4h 5m
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2026-09-08 12:21  →  2026-09-08 16:25  ·  4h 3m
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2026-09-08 00:07  →  2026-09-08 04:37  ·  4h 30m
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2026-09-05 23:53  →  2026-09-06 03:59  ·  4h 6m
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2026-09-05 19:44  →  2026-09-05 23:51  ·  4h 7m
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2026-09-04 22:48  →  2026-09-05 03:08  ·  4h 20m
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2026-09-04 20:13  →  2026-09-05 00:29  ·  4h 16m
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2026-09-04 18:30  →  2026-09-04 22:39  ·  4h 8m
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Codeshare partnerships

Marketing carriers selling tickets on this route under their own flight numbers

sells ASA 839
sells ASA 790
sells ASA 737
sells ASA 431
sells ASA 358
sells UAL 356
sells UAL 277
sells ASA 58
sells UAL 1
sells UAL 1

Looking for the return flight?

View KSEA → KIAH