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

Houston, TX (IAH) to Boston, MA (BOS) flight delay odds

71.7% of 2,025 official scheduled IAH-to-BOS flights arrived on time; 19.7% 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
71.7%arrived on time
19.7%30+ min late
1.2%cancelled
2,025scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late11.5%all scheduled flights
120+ minutes late4.6%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+12.8 mincompleted flights

Which departure time was most reliable for IAH to BOS?

Among qualifying IAH-to-BOS departure window results, Early morning had the highest on-time rate: 94.2% of 362 flights. Afternoon was lowest at 62.6% across 846 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning36294.2%3.0%0.8%
Late morning33675.0%15.5%0.3%
Afternoon84662.6%27.4%1.7%
Evening48168.4%21.6%1.5%

Which weekday was most reliable for IAH to BOS?

Among qualifying IAH-to-BOS weekday results, Saturday had the highest on-time rate: 80.2% of 263 flights. Thursday was lowest at 67.2% across 299 flights.

DayFlightsOn time30+ minCancelled
Monday29670.6%21.6%3.4%
Tuesday28372.4%17.3%1.1%
Wednesday28674.1%16.1%1.0%
Thursday29967.2%25.1%0.7%
Friday29870.8%22.5%0.3%
Saturday26380.2%13.7%0.0%
Sunday30067.7%20.7%2.0%

Which airline was most reliable for IAH to BOS?

Among qualifying IAH-to-BOS airline results, United Airlines had the highest on-time rate: 75.1% of 1,565 flights. JetBlue Airways was lowest at 60.2% across 460 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines1,56575.1%17.1%1.1%
JetBlue Airways46060.2%28.5%1.7%

Which month was most reliable for IAH to BOS?

Among qualifying IAH-to-BOS month results, December 2025 had the highest on-time rate: 86.3% of 175 flights. October 2025 was lowest at 56.1% across 189 flights.

MonthFlightsOn time30+ minCancelled
July 202521669.0%24.5%1.9%
August 202519671.4%20.4%0.5%
September 202515857.0%35.4%0.6%
October 202518956.1%32.3%0.0%
November 202518976.2%15.9%0.5%
December 202517586.3%7.4%0.0%
January 202611580.9%7.0%5.2%
February 202612380.5%7.3%8.9%
March 202614876.4%16.9%0.7%
April 202615173.5%17.2%0.0%
May 202617872.5%18.5%0.0%
June 202618767.9%24.1%0.0%

What drove IAH to BOS delay minutes?

National airspace was the largest recorded IAH-to-BOS delay category, accounting for 49.0% of 39,842 BTS-attributed delay minutes during July 2025–June 2026.

Airline15.8%
Late aircraft30.5%
National airspace49.0%
Weather4.6%
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.