Historical on-time performance
New York to Houston
1,417 miData through May 2026Source: US DOT · BTS
Flights on JFK–IAH arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled2.6%of scheduled flights
based on 154 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time78%Medianon timep9035 minCancel2.6%Flights154
Why flights run late
Delay causes
- Airline33%
- Weather7%
- Air traffic (NAS)37%
- Late aircraft23%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline100%
- Weather0%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 4 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 JFK → IAH
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 — 75% on time.
- Mornings75% on time · p90 40 min · 671 flights
- Middays66% on time · p90 75 min · 328 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 66% to 76% on time.
- Wednesdays76% on time · p90 30 min · 141 flights · limited
- Tuesdays76% on time · p90 45 min · 141 flights · limited
- Mondays74% on time · p90 50 min · 149 flights · limited
- Sundays74% on time · p90 75 min · 151 flights · limited
- Fridays69% on time · p90 65 min · 152 flights · limited
- Saturdays67% on time · p90 85 min · 141 flights · limited
- Thursdays66% on time · p90 55 min · 149 flights · limited
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