Houston (IAH) to Des Moines (DSM): On-Time Performance
Data through July 2026
Houston (IAH) to Des Moines (DSM) is a thinner route than most in this dataset — 346 departures over the past year, roughly 7 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 73% arrived on time.
- On-time
- 73%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 1.3%
- Flights/day
- 0.95
- last 12 months
- Duration
- 2h 23m
- scheduled
- Distance
- 802 mi
Monthly on-time trend
Best time to fly from IAH to DSM
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 71% | 22 min |
| Tuesdaybest | 77% | 17 min |
| Wednesday | 76% | 16 min |
| Thursday | 75% | 16 min |
| Friday | 74% | 17 min |
| Saturday | 72% | 15 min |
| Sunday | 68% | 19 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft51%
- Airline operations38%
- National airspace system7%
- Weather5%
Frequently asked questions
- How often are flights from IAH to DSM delayed?
- 27% of IAH–DSM 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 17 minutes.
- How long is the flight from IAH to DSM?
- The scheduled IAH–DSM flight time averages 2h 23m over 802 miles. Actual arrival times vary — flights on this route land 15+ minutes late 27% of the time.
- How often are IAH to DSM flights cancelled?
- 1.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from IAH to DSM?
- July 2024 was the roughest month in this dataset, with only 43% of arrivals on time. The best was February 2026 at 100%. If your dates are flexible, that 57-point gap is worth planning around.
Explore related pages
More routes from IAH
Other ways to fly to Des Moines (DSM)
Related guides
Based on 667 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.