Houston (IAH) to Charleston (CHS): On-Time Performance
Data through July 2026
Houston (IAH) to Charleston (CHS) is a thinner route than most in this dataset — 210 departures over the past year, roughly 4 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 64% arrived on time, noticeably below the national average of 78%.
- On-time
- 64%
- arrived <15 min late
- Avg delay
- 28 min
- completed flights
- Cancelled
- 1.4%
- Flights/day
- 0.58
- last 12 months
- Duration
- 2h 32m
- scheduled
- Distance
- 925 mi
Monthly on-time trend
Best time to fly from IAH to CHS
Aim for departures around 12 p.m. (79% on-time); avoid 7 p.m. departures (35%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 59% | 40 min |
| Tuesdaybest | 71% | 17 min |
| Wednesday | 65% | 23 min |
| Thursday | 65% | 29 min |
| Friday | 62% | 27 min |
| Saturday | 60% | 35 min |
| Sunday | 68% | 22 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft58%
- Airline operations31%
- National airspace system8%
- Weather3%
Frequently asked questions
- How often are flights from IAH to CHS delayed?
- 36% of IAH–CHS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 28 minutes.
- What is the best time of day to fly from IAH to CHS?
- Departures around 12 p.m. have the best record (79% on-time), while departures around 7 p.m. have the worst (35%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from IAH to CHS?
- The scheduled IAH–CHS flight time averages 2h 32m over 925 miles. Actual arrival times vary — flights on this route land 15+ minutes late 36% of the time.
- How often are IAH to CHS flights cancelled?
- 1.4% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from IAH to CHS?
- July 2025 was the roughest month in this dataset, with only 28% of arrivals on time. The best was February 2026 at 88%. If your dates are flexible, that 60-point gap is worth planning around.
Explore related pages
More routes from IAH
Other ways to fly to Charleston (CHS)
Related guides
Based on 510 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.