Historical on-time performance
Charleston to Houston
925 miData through Dec 2025Source: US DOT · BTS
Flights on CHS–IAH arrive on time 83% of the time over the last 12 months.
On-time rate83%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled3.3%of scheduled flights
based on 30 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time83%Medianon timep9030 minCancel3.3%Flights30
Why flights run late
Delay causes
- Airline89%
- Weather11%
- Air traffic (NAS)0%
- Late aircraft0%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly CHS → IAH
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 — 89% on time.
- Mornings89% on time · p90 10 min · 298 flights
- Afternoons74% on time · p90 60 min · 301 flights
- Evenings59% on time · p90 80 min · 301 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 68% to 81% on time.
- Wednesdays81% on time · p90 30 min · 129 flights · limited
- Tuesdays78% on time · p90 50 min · 130 flights · limited
- Saturdays77% on time · p90 55 min · 110 flights · limited
- Thursdays75% on time · p90 60 min · 133 flights · limited
- Mondays71% on time · p90 65 min · 137 flights · limited
- Fridays70% on time · p90 60 min · 130 flights · limited
- Sundays68% on time · p90 65 min · 131 flights · limited
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