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

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

87.6% of 347 official scheduled DSM-to-IAH flights arrived on time; 5.2% arrived at least 30 minutes late and 1.7% 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
87.6%arrived on time
5.2%30+ min late
1.7%cancelled
347scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.5%all scheduled flights
120+ minutes late2.0%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival-3.7 mincompleted flights

Which departure time was most reliable for DSM to IAH?

Only Early morning met the DSM-to-IAH departure window threshold: 87.6% of 347 scheduled flights arrived on time during July 2025–June 2026.

Departure windowFlightsOn time30+ minCancelled
Early morning34787.6%5.2%1.7%

Which weekday was most reliable for DSM to IAH?

Among qualifying DSM-to-IAH weekday results, Thursday had the highest on-time rate: 90.2% of 51 flights. Saturday was lowest at 83.7% across 49 flights.

DayFlightsOn time30+ minCancelled
Monday4987.8%6.1%0.0%
Tuesday5084.0%10.0%0.0%
Wednesday5090.0%4.0%2.0%
Thursday5190.2%5.9%2.0%
Friday4989.8%2.0%2.0%
Saturday4983.7%6.1%2.0%
Sunday4987.8%2.0%4.1%

Which airline was most reliable for DSM to IAH?

Only United Airlines met the DSM-to-IAH airline threshold: 87.6% of 346 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
United Airlines34687.6%5.2%1.7%
SkyWest Airlines1100.0%0.0%0.0%

Which month was most reliable for DSM to IAH?

Among qualifying DSM-to-IAH month results, August 2025 had the highest on-time rate: 93.5% of 31 flights. May 2026 was lowest at 74.2% across 31 flights.

MonthFlightsOn time30+ minCancelled
July 20253187.1%3.2%3.2%
August 20253193.5%6.5%0.0%
September 20253093.3%3.3%0.0%
October 20253193.5%0.0%0.0%
November 20253090.0%3.3%6.7%
December 20251989.5%5.3%0.0%
January 20262584.0%8.0%0.0%
February 20262889.3%7.1%3.6%
March 20263187.1%6.5%3.2%
April 20263086.7%0.0%0.0%
May 20263174.2%12.9%3.2%
June 20263083.3%6.7%0.0%

What drove DSM to IAH delay minutes?

Airline was the largest recorded DSM-to-IAH delay category, accounting for 60.3% of 2,797 BTS-attributed delay minutes during July 2025–June 2026.

Airline60.3%
Late aircraft11.5%
National airspace27.6%
Weather0.5%
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.