Route Reliability
Houston → Seattle
IAH–SEA · 1,874 miles · George Bush Intercontinental Airport to Seattle–Tacoma International Airport
- 77%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 0.9%
- Cancelled
- 2,107
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines77%1,252 flights
- 2.Alaska Airlines77%855 flights
What the data says
The 12–3 PM departure wins.
IAH–SEA flights departing between 12–3 PM arrived on time 89% of the time, versus 65% between 6–9 PM.
Monday is the weak spot.
IAH–SEA flights arrived on time 83% of the time on Tuesdays. On Mondays: 74%.
Not much between United Airlines and Alaska Airlines.
On this route they all land within 77% to 77% on time. Pick on schedule and price.
Trending in the right direction.
IAH–SEA flights arrived on time 85% of the time over the last three months in the data, compared with 76% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon74%(306 flights)
- Tue83%(282 flights)
- Wed77%(281 flights)
- Thu79%(304 flights)
- Fri77%(306 flights)
- Sat75%(298 flights)
- Sun75%(307 flights)
- 6–9 AM86%(475 flights)
- 9 AM–12 PM83%(443 flights)
- 12–3 PM89%(55 flights)
- 3–6 PM81%(318 flights)
- 6–9 PM65%(775 flights)
- 9 PM–12 AM78%(18 flights)
Jun 63% → May 88% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 63% | 220 |
| July 2025 | 68% | 231 |
| August 2025 | 69% | 225 |
| September 2025 | 87% | 199 |
| October 2025 | 83% | 174 |
| November 2025 | 79% | 148 |
| December 2025 | 71% | 167 |
| January 2026 | 75% | 133 |
| February 2026 | 82% | 112 |
| March 2026 | 77% | 142 |
| April 2026 | 91% | 150 |
| May 2026 | 88% | 183 |
Same trip, other airports
Keep nerding
Based on 2,107 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.