Historical on-time performance
Houston to Charleston
925 miData through May 2026Source: US DOT · BTS
Flights on IAH–CHS arrive on time 64% of the time over the last 12 months.
On-time rate64%arrived within 15 min
p90 delay70 min1 in 10 flights is worse (tail risk)
Cancelled0.8%of scheduled flights
based on 122 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time64%Medianon timep9070 minCancel0.8%Flights122
Why flights run late
Delay causes
- Airline20%
- Weather0%
- Air traffic (NAS)11%
- Late aircraft69%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather100%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 1 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 → CHS
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Middays are the most reliable time of day to fly this route — 74% on time.
- Middays74% on time · p90 55 min · 591 flights
- Evenings61% on time · p90 75 min · 306 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 63% to 77% on time.
- Saturdays77% on time · p90 50 min · 110 flights · limited
- Tuesdays72% on time · p90 50 min · 126 flights · limited
- Wednesdays71% on time · p90 45 min · 132 flights · limited
- Thursdays70% on time · p90 55 min · 133 flights · limited
- Sundays69% on time · p90 75 min · 134 flights · limited
- Fridays67% on time · p90 85 min · 127 flights · limited
- Mondays63% on time · p90 70 min · 135 flights · limited
Keep exploring