Route Reliability
Houston → St. Louis
HOU–STL · 687 miles · William P. Hobby Airport to St. Louis Lambert International Airport
- 81%
- Arrive within 15 minutes
- 5 min
- Average arrival delay
- 0.3%
- Cancelled
- 1,550
- Flights in the data
Data through May 2026.
Southwest Airlines is the only airline in this data on this route, arriving on time 81% of the time across 1,550 flights. No comparison to make.
What the data says
Morning flights do better here.
HOU–STL flights departing between 3–6 AM arrived on time 96% of the time, versus 67% between 9 PM–12 AM.
Sunday scaries are real for this one.
HOU–STL flights arrived on time 85% of the time on Tuesdays. On Sundays: 77%.
It basically never cancels.
Out of 1,550 scheduled flights, only 0.3% were cancelled.
Recent months have been rougher.
HOU–STL flights arrived on time 74% of the time over the last three months in the data, compared with 88% in the three months before that.
Flights on this route
The breakdown
- Mon83%(242 flights)
- Tue85%(211 flights)
- Wed81%(210 flights)
- Thu77%(235 flights)
- Fri81%(239 flights)
- Sat84%(157 flights)
- Sun77%(247 flights)
- 3–6 AM96%(242 flights)
- 6–9 AM92%(304 flights)
- 9 AM–12 PM87%(99 flights)
- 12–3 PM80%(250 flights)
- 3–6 PM68%(265 flights)
- 6–9 PM72%(281 flights)
- 9 PM–12 AM67%(100 flights)
Jun 78% → May 72% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 78% | 138 |
| July 2025 | 78% | 143 |
| August 2025 | 77% | 129 |
| September 2025 | 88% | 125 |
| October 2025 | 80% | 123 |
| November 2025 | 90% | 131 |
| December 2025 | 86% | 138 |
| January 2026 | 93% | 105 |
| February 2026 | 84% | 106 |
| March 2026 | 69% | 143 |
| April 2026 | 80% | 131 |
| May 2026 | 72% | 129 |
Same trip, other airports
Keep nerding
Based on 1,550 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.