Kansas City (MCI) to Houston (IAH): On-Time Performance
Data through July 2026
When you fly MCI to IAH matters as much as anything else about the booking: the route swung from 100% on-time in September 2025 to just 73% in April 2025. Across the full period the route averages 85% on-time against a national 78%.
- On-time
- 85%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 2.0%
- Flights/day
- 1.3
- last 12 months
- Duration
- 2h 11m
- scheduled
- Distance
- 643 mi
Best airline from MCI to IAH
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 87% | 12 min | 1.6% | 923 |
| SkyWest Airlines | 73% | 14 min | 6.0% | 83 |
Monthly on-time trend
Best time to fly from MCI to IAH
Aim for departures around 8 a.m. (87% on-time); avoid 3 p.m. departures (75%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 84% | 12 min |
| Tuesday | 86% | 13 min |
| Wednesdaybest | 94% | 8 min |
| Thursday | 83% | 12 min |
| Friday | 86% | 11 min |
| Saturday | 81% | 18 min |
| Sunday | 84% | 11 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft16%
- Airline operations51%
- National airspace system30%
- Weather3%
Frequently asked questions
- How often are flights from MCI to IAH delayed?
- 15% of MCI–IAH flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 12 minutes.
- Which airline is most reliable from MCI to IAH?
- United Airlines has the best on-time record on this route at 87%, based on 923 flights. 2 airlines flew MCI–IAH frequently enough to compare in this period.
- What is the best time of day to fly from MCI to IAH?
- Departures around 8 a.m. have the best record (87% on-time), while departures around 3 p.m. have the worst (75%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MCI to IAH?
- The scheduled MCI–IAH flight time averages 2h 11m over 643 miles. Actual arrival times vary — flights on this route land 15+ minutes late 15% of the time.
- How often are MCI to IAH flights cancelled?
- 2% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from MCI to IAH?
- April 2025 was the roughest month in this dataset, with only 73% of arrivals on time. The best was September 2025 at 100%. If your dates are flexible, that 27-point gap is worth planning around.
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Based on 1,007 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.