Route on-time record
IAH to DSM: most on-time flights and the best time to fly
Houston (George Bush Intercontinental Airport) to Des Moines (Des Moines International Airport). 347 nonstop flights in Jun 2025 to May 2026, 74% arrived within 15 minutes and 1.2% were cancelled. The most reliable flight number was United 1780 at 8:13 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
IAH → DSM
Houston to Des Moines: 347 nonstop flights a year
On time (12 months)
74%
Cancelled
1.2%
avg delay 18 min
Best time to leave
No clear winner
Most reliable airline
United
73% chance on time
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Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · United 1780
8:13 PM → 10:43 PM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
73%
chance on time
- On time (history)
- 74%
- Cancelled
- 1.2%
- Avg arrival delay
- 18 min
- Arrived on time 74% of the time (339 flights, Jun 2025 to May 2026).
- Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).
Strong track record · 339 flights
Find United 1780 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines73%
346 flights · 74% on time as flown · 1.2% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- 6 to 9 PM74%
344 flights · avg delay 18 min
Best day: Monday (76%). Worst: Sunday (60%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft48%
- Airline (crew, maintenance, boarding)43%
- Air traffic control and airport volume5%
- Severe weather4%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
IAH to DSM questions
- Which airline is most on time from IAH to DSM?
- United, with a season-adjusted 73% chance of operating and arriving on time over 346 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on IAH to DSM?
- June (43% on time); the best was February (93%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from IAH
- DSM to IAH (return)
- IAH to ORD 75%
- IAH to DFW 75%
- IAH to LAX 83%
- IAH to ATL 77%
- IAH to DEN 81%
- IAH to LGA 72%
- IAH to EWR 74%
- IAH to MIA 78%
- IAH to MCO 81%
- IAH to SFO 79%
- IAH to LAS 82%
- IAH to DCA 75%
Live status: FAA delays and ground stops