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

Dallas/Fort Worth, TX (DFW) to Houston, TX (IAH) flight delay odds

Historically, 67.6% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 5,780 flights.

HISTORICAL ROUTE SIGNALVariable
67.6%arrived on time
19.6%30+ min late
2.9%cancelled
5,780scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late11.6%all scheduled flights
120+ minutes late5.6%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+19.5 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Early morning1,28276.8%10.7%1.6%
Late morning83374.7%15.1%2.3%
Afternoon1,86267.8%19.9%3.1%
Evening1,33058.9%26.3%3.9%
Night47354.3%31.3%4.2%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday85966.4%21.8%2.6%
Tuesday81174.2%14.8%1.8%
Wednesday84073.3%16.0%1.5%
Thursday86669.5%18.4%2.0%
Friday84966.1%20.3%2.8%
Saturday72762.3%21.7%6.2%
Sunday82861.0%24.4%4.0%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
American Airlines2,46557.4%27.7%3.7%
United Airlines2,41475.2%14.3%2.0%
Envoy Air84075.4%11.3%3.0%
SkyWest Airlines5371.7%13.2%7.5%
PSA Airlines875.0%25.0%0.0%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 202545766.1%20.8%4.6%
August 202546456.9%27.6%2.8%
September 202549869.1%16.7%2.2%
October 202550364.0%18.3%1.6%
November 202547464.1%21.5%4.9%
December 202550271.3%16.5%0.2%
January 202647573.7%12.8%8.6%
February 202641386.0%9.9%0.5%
March 202648968.1%18.6%2.7%
April 202652371.9%20.7%0.8%
May 202651866.0%21.8%2.9%
June 202646455.8%29.1%3.7%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline26.3%
Late aircraft43.9%
National airspace23.0%
Weather6.8%
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.