Route
IAH → SEA
George Bush Intercontinental Airport Seattle–Tacoma International Airport
How punctual is this route?
- On-time arrivals
- 80.7%
- Less than 15 minutes late
- Cancelled
- 0.2%
- Of scheduled flights
- Average delay when late
- 59 min
- Flights arriving 15+ minutes late
- Flights tracked
- 2,072
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 39%
- Airline (crew, maintenance, cleaning) 30%
- Air traffic control & airport 26%
- Extreme weather 5%
- Security 1%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 85.9% | 199 |
| October 2025 | 80.5% | 175 |
| November 2025 | 77.7% | 148 |
| December 2025 | 70.7% | 169 |
| January 2026 | 75.2% | 134 |
| February 2026 | 82.1% | 112 |
| March 2026 | 76.1% | 144 |
| April 2026 | 90.7% | 150 |
| May 2026 | 88.0% | 183 |
| June 2026 | 74.2% | 217 |
| July 2026 | 80.9% | 231 |
| August 2026 | 84.8% | 210 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| United Airlines | 1,230 | 79.9% | 0.1% | 59 min |
| Alaska Airlines | 842 | 81.9% | 0.5% | 59 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
AS439
23% late · 361 flights
-
AS453
13% late · 334 flights
-
UA2456
26% late · 280 flights
-
UA2205
21% late · 156 flights
-
UA2638
30% late · 123 flights
-
AS241
17% late · 111 flights
-
UA2654
4% late · 46 flights
-
UA692
28% late · 40 flights
-
UA1649
11% late · 37 flights
-
UA659
11% late · 37 flights
-
UA672
19% late · 37 flights
-
UA1351
14% late · 35 flights
-
AS399
12% late · 34 flights
-
UA1606
12% late · 32 flights
-
UA1486
6% late · 31 flights
-
UA774
17% late · 30 flights
-
UA1795
28% late · 29 flights
-
UA515
7% late · 29 flights
-
UA366
12% late · 24 flights
-
UA1653
9% late · 23 flights
-
UA2089
9% late · 23 flights
-
UA2119
17% late · 23 flights
-
UA2197
26% late · 23 flights
-
UA2228
0% late · 21 flights
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