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

New York, NY (LGA) to Houston, TX (IAH) flight delay odds

Historically, 74.2% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 4,060 flights.

HISTORICAL ROUTE SIGNALVariable
74.2%arrived on time
15.9%30+ min late
2.6%cancelled
4,060scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.5%all scheduled flights
120+ minutes late4.6%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+6.7 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 morning1,11588.4%4.7%2.4%
Late morning81475.2%14.0%3.7%
Afternoon1,25571.1%17.5%1.6%
Evening87659.8%29.6%3.2%

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
Monday62471.5%18.3%4.5%
Tuesday63678.0%13.4%1.9%
Wednesday61474.6%15.3%2.1%
Thursday60573.7%16.2%2.3%
Friday61176.4%14.4%1.6%
Saturday38976.6%13.6%2.8%
Sunday58169.4%19.3%2.9%

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
United Airlines2,38275.5%15.4%1.8%
Delta Air Lines1,34271.3%17.8%3.7%
Spirit Airlines30476.6%11.2%3.9%
SkyWest Airlines3278.1%15.6%3.1%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202538066.6%25.3%3.2%
August 202537779.6%14.6%0.5%
September 202536985.9%10.0%0.0%
October 202537668.4%17.8%2.4%
November 202535374.5%17.0%1.1%
December 202535067.7%18.3%4.3%
January 202628979.9%9.3%4.5%
February 202624178.8%10.8%5.8%
March 202627371.1%14.7%8.8%
April 202636580.0%12.6%1.1%
May 202634768.6%20.5%1.4%
June 202634071.2%16.2%0.9%

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.

Airline35.6%
Late aircraft33.3%
National airspace25.4%
Weather5.6%
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.