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

Baltimore, MD (BWI) to Houston, TX (IAH) flight delay odds

78.2% of 1,311 official scheduled BWI-to-IAH flights arrived on time; 13.8% arrived at least 30 minutes late and 1.8% 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
78.2%arrived on time
13.8%30+ min late
1.8%cancelled
1,311scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.7%all scheduled flights
120+ minutes late4.0%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+4.3 mincompleted flights

Which departure time was most reliable for BWI to IAH?

Among qualifying BWI-to-IAH departure window results, Early morning had the highest on-time rate: 90.7% of 418 flights. Evening was lowest at 64.0% across 322 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning41890.7%5.3%1.2%
Late morning11381.4%14.2%0.0%
Afternoon44177.3%13.8%1.1%
Evening32264.0%24.2%3.1%

Which weekday was most reliable for BWI to IAH?

Among qualifying BWI-to-IAH weekday results, Thursday had the highest on-time rate: 85.8% of 212 flights. Sunday was lowest at 73.1% across 193 flights.

DayFlightsOn time30+ minCancelled
Monday19774.6%15.7%2.5%
Tuesday17281.4%12.2%0.6%
Wednesday17181.3%12.3%0.0%
Thursday21285.8%10.4%0.0%
Friday20673.3%14.1%2.9%
Saturday16078.1%16.9%1.9%
Sunday19373.1%15.5%4.7%

Which airline was most reliable for BWI to IAH?

Among qualifying BWI-to-IAH airline results, United Airlines had the highest on-time rate: 82.0% of 816 flights. Frontier Airlines was lowest at 63.6% across 118 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines81682.0%11.0%1.1%
Spirit Airlines37674.5%16.8%2.7%
Frontier Airlines11863.6%23.7%4.2%
SkyWest Airlines1100.0%0.0%0.0%

Which month was most reliable for BWI to IAH?

Among qualifying BWI-to-IAH month results, September 2025 had the highest on-time rate: 88.7% of 106 flights. May 2026 was lowest at 67.0% across 106 flights.

MonthFlightsOn time30+ minCancelled
July 202510675.5%17.9%1.9%
August 202510085.0%8.0%0.0%
September 202510688.7%8.5%0.0%
October 202510886.1%8.3%0.0%
November 202512379.7%15.4%1.6%
December 202510475.0%19.2%0.0%
January 202611980.7%8.4%7.6%
February 202610283.3%11.8%2.9%
March 202611575.7%13.9%4.3%
April 202611971.4%15.1%1.7%
May 202610667.0%21.7%0.0%
June 202610370.9%17.5%1.0%

What drove BWI to IAH delay minutes?

Airline was the largest recorded BWI-to-IAH delay category, accounting for 33.1% of 22,972 BTS-attributed delay minutes during July 2025–June 2026.

Airline33.1%
Late aircraft27.1%
National airspace32.5%
Weather7.3%
Security0.1%
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.