IAH (Houston) to CHS (Charleston) flights arrive on time 64% of the time. The most reliable airline on this route is United Airlines at 65%. The average delay is 74 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated March 2026.IAH → CHS
IAH (Houston) to CHS (Charleston)
IAH → CHS on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is frequently delayed. About 64% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
United Airlines is significantly more reliable on this route at 65% on time vs SkyWest Airlines at 45%.
Airline Comparison
United Airlines leads at 65% on time; SkyWest Airlines trails at 45%.
Accurate?
Good to know
Departing from IAH
80% on timeExpect ~18 min sitting on the taxiway after your gate pushes back. IAH has long runway queues.
TSA is currently ~11 min. Best time: 4 AM (about 5 min).
Arriving at CHS
80% on timeWhen flights into CHS are late, the average delay is 70 minutes. Build buffer if you have ground plans.
If connecting at CHS: TSA is ~15 min right now. Allow at least 60 minutes for a domestic connection.
CHS has a 2.1% cancellation rate — keep the airline app handy for rebooking.
Flight cancelled or delayed?
Check what United Airlines owes you — refund rights, action plan, complaint email. Free.
Free flight briefing
Know before you go
Flying IAH → CHS? We'll brief you before takeoff.
Delay riskDOT stats + live data
TSA waitCurrent checkpoint lines
WeatherBoth airports
Gate & terminalLive updates
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated March 2026. Source: Bureau of Transportation Statistics.