Route Reliability
Seattle → Houston
SEA–IAH · 1,874 miles · Seattle–Tacoma International Airport to George Bush Intercontinental Airport
- 79%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 0.9%
- Cancelled
- 2,106
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines84%1,251 flights
- 2.Alaska Airlines71%855 flights
What the data says
The 6–9 AM departure wins.
SEA–IAH flights departing between 6–9 AM arrived on time 91% of the time, versus 67% between 9 AM–12 PM.
Friday is doing you no favors.
SEA–IAH flights arrived on time 83% of the time on Tuesdays. On Fridays: 72%.
United Airlines runs this route best.
United Airlines arrived on time 84% of the time on this route; Alaska Airlines managed 71%.
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
- Mon79%(298 flights)
- Tue83%(279 flights)
- Wed83%(289 flights)
- Thu77%(304 flights)
- Fri72%(303 flights)
- Sat78%(301 flights)
- Sun80%(304 flights)
- 3–6 AM85%(79 flights)
- 6–9 AM91%(359 flights)
- 9 AM–12 PM67%(460 flights)
- 12–3 PM81%(261 flights)
- 3–6 PM80%(417 flights)
- 6–9 PM—(1 flights)
- 9 PM–12 AM77%(501 flights)
Jun 65% → May 85% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 65% | 219 |
| July 2025 | 65% | 228 |
| August 2025 | 71% | 224 |
| September 2025 | 90% | 198 |
| October 2025 | 83% | 175 |
| November 2025 | 82% | 148 |
| December 2025 | 76% | 168 |
| January 2026 | 85% | 133 |
| February 2026 | 94% | 112 |
| March 2026 | 82% | 141 |
| April 2026 | 87% | 150 |
| May 2026 | 85% | 182 |
Same trip, other airports
Keep nerding
Based on 2,106 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.