IAH to CHS flight delays & on-time performance
Nonstop flights from George Bush Intercontinental Airport to Charleston International Airport · 925 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at IAH or CHS right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Houston (IAH) to Charleston (CHS) arrived on time 69% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0% were cancelled, and 12% arrived an hour or more late.
- United Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 12pm did best (79% on time); around 7pm did worst (28%).
- Sunday was the most reliable day to fly (77% on time) and Thursday the least (56%).
- The largest source of delay minutes was late-arriving aircraft (58%).
Which airline is most on time from IAH to CHS?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 69% | 0.0% | 22 min | 11.9% | 210 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 12pm79%125 flights
- 6pm61%67 flights
- 7pm28%18 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday66%0.0% cancelled
- Tuesday77%0.0% cancelled
- Wednesday72%0.0% cancelled
- Thursday56%0.0% cancelled
- Friday67%0.0% cancelled
- Saturday71%0.0% cancelled
- Sunday77%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft58%
- Airline (crew, maintenance, cleaning, fueling)29%
- Air traffic control & airport congestion10%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
No cancellation causes recorded in this period.
IAH to CHS: common questions
- How often are IAH to CHS flights on time?
- 69% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Houston to Charleston cancelled?
- 0.0% of scheduled flights were cancelled (0 of 210).
- How long are typical delays?
- Across all flights the average arrival delay was 22 min (early arrivals count as zero). Flights that were late arrived 68 min behind schedule on average, and 11.9% of flights were an hour or more late.
- How long is taxi time at IAH?
- Flights on this route spent 20 min taxiing from the gate to takeoff on average.
Related routes
Return trip: CHS to IAH — 84% on time
More flights from Houston
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: IAH → CHS, nonstop flights by US airlines that report to the DOT. How we calculate this.