Route Reliability
Houston → GUC
IAH–GUC · 886 miles · George Bush Intercontinental Airport to GUC Airport
80
Pretty Reliable
WanderNerd Reliability Score
- 89%
- Arrive within 15 minutes
- 7 min early
- Average arrival delay
- 0.8%
- Cancelled
- 118
- Flights in the data
Data through May 2026.
United Airlines is the only airline in this data on this route, arriving on time 89% of the time across 118 flights. No comparison to make.
What the data says
Morning flights do better here.
IAH–GUC flights departing between 9 AM–12 PM arrived on time 90% of the time, versus 80% between 6–9 PM.
Mondays have been rough.
IAH–GUC flights arrived on time 100% of the time on Wednesdays and just 79% on Mondays. That gap is worth planning around.
Flights on this route
The breakdown
- Mon79%(14 flights)
- Tue93%(14 flights)
- Wed100%(14 flights)
- Thu93%(14 flights)
- Fri86%(21 flights)
- Sat88%(24 flights)
- Sun83%(12 flights)
- 9 AM–12 PM90%(97 flights)
- 12–3 PM—(1 flights)
- 6–9 PM80%(15 flights)
93%
Mar
Dec 93% → Mar 93% on time
| Month | On-time percentage | Flights |
|---|---|---|
| December 2025 | 93% | 14 |
| January 2026 | 85% | 27 |
| February 2026 | 89% | 28 |
| March 2026 | 93% | 27 |
Keep nerding
Based on 118 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.