BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
IAH→DSM

Houston, TX (IAH) to Des Moines, IA (DSM) flight delay odds

74.4% of 347 official scheduled IAH-to-DSM flights arrived on time; 17.6% arrived at least 30 minutes late and 1.2% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
74.4%arrived on time
17.6%30+ min late
1.2%cancelled
347scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.6%all scheduled flights
120+ minutes late2.9%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+8.9 mincompleted flights

Which departure time was most reliable for IAH to DSM?

Only Evening met the IAH-to-DSM departure window threshold: 74.5% of 345 scheduled flights arrived on time during July 2025–June 2026.

Departure windowFlightsOn time30+ minCancelled
Evening34574.5%17.7%1.2%

Which weekday was most reliable for IAH to DSM?

Among qualifying IAH-to-DSM weekday results, Wednesday had the highest on-time rate: 80.4% of 51 flights. Saturday was lowest at 67.3% across 49 flights.

DayFlightsOn time30+ minCancelled
Monday4977.6%20.4%0.0%
Tuesday5176.5%15.7%0.0%
Wednesday5180.4%13.7%2.0%
Thursday4975.5%12.2%4.1%
Friday4971.4%26.5%0.0%
Saturday4967.3%16.3%2.0%
Sunday4971.4%18.4%0.0%

Which airline was most reliable for IAH to DSM?

Only United Airlines met the IAH-to-DSM airline threshold: 74.6% of 346 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
United Airlines34674.6%17.6%1.2%
SkyWest Airlines10.0%0.0%0.0%

Which month was most reliable for IAH to DSM?

Among qualifying IAH-to-DSM month results, February 2026 had the highest on-time rate: 96.4% of 28 flights. August 2025 was lowest at 51.6% across 31 flights.

MonthFlightsOn time30+ minCancelled
July 20253164.5%19.4%3.2%
August 20253151.6%25.8%3.2%
September 20253076.7%16.7%0.0%
October 20253183.9%16.1%0.0%
November 20253056.7%30.0%0.0%
December 20251872.2%22.2%0.0%
January 20262692.3%7.7%0.0%
February 20262896.4%0.0%3.6%
March 20263180.6%12.9%3.2%
April 20263076.7%20.0%0.0%
May 20263171.0%19.4%0.0%
June 20263073.3%20.0%0.0%

What drove IAH to DSM delay minutes?

Airline was the largest recorded IAH-to-DSM delay category, accounting for 46.7% of 5,229 BTS-attributed delay minutes during July 2025–June 2026.

Airline46.7%
Late aircraft44.5%
National airspace5.2%
Weather3.6%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.