Route
SEA → IAH
Seattle–Tacoma International Airport George Bush Intercontinental Airport
How punctual is this route?
- On-time arrivals
- 84.0%
- Less than 15 minutes late
- Cancelled
- 0.3%
- Of scheduled flights
- Average delay when late
- 67 min
- Flights arriving 15+ minutes late
- Flights tracked
- 2,071
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 48%
- Late-arriving aircraft 31%
- Air traffic control & airport 20%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 89.4% | 198 |
| October 2025 | 82.3% | 176 |
| November 2025 | 81.8% | 148 |
| December 2025 | 75.0% | 168 |
| January 2026 | 84.2% | 134 |
| February 2026 | 93.8% | 112 |
| March 2026 | 80.9% | 144 |
| April 2026 | 86.7% | 150 |
| May 2026 | 85.2% | 184 |
| June 2026 | 85.1% | 217 |
| July 2026 | 81.7% | 231 |
| August 2026 | 84.1% | 209 |
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 | 87.9% | 0.2% | 84 min |
| Alaska Airlines | 841 | 78.2% | 0.5% | 54 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA2135
7% late · 364 flights
-
AS438
29% late · 363 flights
-
AS398
16% late · 344 flights
-
UA2379
16% late · 227 flights
-
UA1660
17% late · 90 flights
-
UA2293
11% late · 81 flights
-
UA2340
21% late · 80 flights
-
UA2748
11% late · 71 flights
-
UA1005
9% late · 54 flights
-
AS1573
27% late · 37 flights
-
UA1293
8% late · 37 flights
-
UA1475
19% late · 37 flights
-
AS1579
12% late · 33 flights
-
UA2693
12% late · 32 flights
-
UA2860
6% late · 32 flights
-
UA485
8% late · 24 flights
-
UA1928
22% late · 23 flights
-
AS452
14% late · 22 flights
-
UA1647
19% late · 21 flights
-
UA1752
10% late · 21 flights
-
AS465
0% late · 20 flights
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