Historical on-time performance
Houston to Boston
1,597 miData through May 2026Source: US DOT · BTS
Flights on IAH–BOS arrive on time 71% of the time over the last 12 months.
On-time rate71%arrived within 15 min
p90 delay65 min1 in 10 flights is worse (tail risk)
Cancelled1.3%of scheduled flights
based on 1,992 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time75%Medianon timep9060 minCancel1.2%Flights1,575
- JetBlue AirwaysOn-time58%Median5 minp9085 minCancel1.7%Flights417
Why flights run late
Delay causes
- Airline16%
- Weather5%
- Air traffic (NAS)47%
- Late aircraft32%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline19%
- Weather69%
- Air traffic (NAS)12%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 26 cancellations with a reported cause (BTS reports causes from June 2003).
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 (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 88% on time.
- Mornings88% on time · p90 20 min · 1,770 flights
- Middays68% on time · p90 80 min · 1,586 flights
- Evenings66% on time · p90 80 min · 1,533 flights
- Afternoons62% on time · p90 85 min · 1,023 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 68% to 78% on time.
- Saturdays78% on time · p90 55 min · 767 flights
- Wednesdays76% on time · p90 45 min · 842 flights
- Tuesdays76% on time · p90 55 min · 834 flights
- Mondays71% on time · p90 80 min · 872 flights
- Sundays70% on time · p90 70 min · 867 flights
- Thursdays69% on time · p90 85 min · 876 flights
- Fridays68% on time · p90 80 min · 877 flights
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