Charleston (CHS) to Houston (IAH): On-Time Performance
Data through May 2026
Charleston (CHS) to Houston (IAH) is a thinner route than most in this dataset — 213 departures over the past year, roughly 4 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 81% arrived on time. Cancellations are the bigger caveat: 3.1% of scheduled flights never departed.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 3.1%
- Flights/day
- 0.58
- last 12 months
- Duration
- 2h 47m
- scheduled
- Distance
- 925 mi
Monthly on-time trend
Best time to fly from CHS to IAH
Aim for departures around 7 a.m. (90% on-time); avoid 5 p.m. departures (71%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 83% | 18 min |
| Tuesdaybest | 85% | 10 min |
| Wednesday | 81% | 14 min |
| Thursday | 77% | 22 min |
| Friday | 78% | 16 min |
| Saturday | 80% | 39 min |
| Sunday | 81% | 13 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft34%
- Airline operations38%
- National airspace system21%
- Weather8%
Frequently asked questions
- How often are flights from CHS to IAH delayed?
- 19% of CHS–IAH flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 18 minutes.
- What is the best time of day to fly from CHS to IAH?
- Departures around 7 a.m. have the best record (90% on-time), while departures around 5 p.m. have the worst (71%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from CHS to IAH?
- The scheduled CHS–IAH flight time averages 2h 47m over 925 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are CHS to IAH flights cancelled?
- 3.1% of scheduled flights on this route were cancelled between 2024-06 and 2026-05 — several times the typical US rate, so consider earlier departures or backup options.
- What is the worst month to fly from CHS to IAH?
- April 2025 was the roughest month in this dataset, with only 64% of arrivals on time. The best was September 2024 at 92%. If your dates are flexible, that 28-point gap is worth planning around.
Explore related pages
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Based on 489 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.