Historical on-time performance
Houston to Boston
1,597 miData through Dec 2025Source: US DOT · BTS
Flights on IAH–BOS arrive on time 72% of the time over the last 12 months.
On-time rate72%arrived within 15 min
p90 delay70 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights
based on 2,016 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time76%Medianon timep9060 minCancel0.6%Flights1,577
- JetBlue AirwaysOn-time58%Medianon timep9085 minCancel2.1%Flights439
Why flights run late
Delay causes
- Airline20%
- Weather6%
- Air traffic (NAS)43%
- Late aircraft30%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly IAH → BOS
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 88% on time.
- Mornings88% on time · p90 15 min · 1,738 flights
- Middays67% on time · p90 85 min · 1,477 flights
- Evenings67% on time · p90 80 min · 1,546 flights
- Afternoons64% on time · p90 85 min · 1,089 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 67% to 78% on time.
- Saturdays78% on time · p90 50 min · 764 flights
- Wednesdays76% on time · p90 50 min · 841 flights
- Tuesdays75% on time · p90 60 min · 837 flights
- Mondays71% on time · p90 80 min · 865 flights
- Sundays70% on time · p90 75 min · 853 flights
- Thursdays70% on time · p90 80 min · 855 flights
- Fridays67% on time · p90 75 min · 858 flights
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