Best Time to Fly IAH to MCI: On-Time Stats by Hour & Airline
George Bush Intercontinental/Houston → Kansas City International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 76.7% of Houston (IAH) to Kansas City (MCI) flights arrived on time (486 scheduled flights). That is 1.0 points below the national average of 77.6%.
United Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Wednesday was the most reliable day (79% on time) and August the worst month (62%).
The cancellation rate was 0.4% (US average 1.8%).
IAH to MCI on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 76.4% | 54 min | 0.4% | 480 |
| SkyWest Airlines | Limited data | 6 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly IAH to MCI
On-time arrival % by scheduled departure hour (local time), 941 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 84.7% | 0.0% | 72 |
| 11am–12pm | 90.2% | 1.6% | 62 |
| 12pm–1pm | 75.0% | 0.0% | 52 |
| 4pm–5pm | 74.3% | 2.8% | 36 |
| 6pm–7pm | Limited data | 4 | |
| 7pm–8pm | 47.3% | 2.6% | 76 |
| 8pm–9pm | 75.8% | 1.2% | 639 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on IAH to MCI
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 13 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 30 | ||
| Summer peak (Jun 15 - Aug 15) | 63.4% | -13.5 pts | 1.8% | 164 |
| All other days | 76.9% | — | 1.1% | 734 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).