Historical on-time performance
Houston to Charleston
925 miData through Dec 2025Source: US DOT · BTS
Flights on IAH–CHS arrive on time 27% of the time over the last 12 months.
On-time rate27%arrived within 15 min
p90 delay125 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-time27%Median30 minp90125 minCancel3.3%Flights30
Why flights run late
Delay causes
- Airline23%
- Weather0%
- Air traffic (NAS)6%
- Late aircraft71%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly IAH → CHS
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Middays are the most reliable time of day to fly this route — 75% on time.
- Middays75% on time · p90 60 min · 607 flights
- Evenings60% on time · p90 85 min · 290 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 64% to 78% on time.
- Saturdays78% on time · p90 50 min · 112 flights · limited
- Wednesdays73% on time · p90 40 min · 133 flights · limited
- Thursdays73% on time · p90 60 min · 133 flights · limited
- Tuesdays70% on time · p90 50 min · 124 flights · limited
- Sundays68% on time · p90 75 min · 136 flights · limited
- Fridays66% on time · p90 100 min · 122 flights · limited
- Mondays64% on time · p90 70 min · 137 flights · limited
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