Route · CHS → IAH · 2020–2025 BTS data
Charleston to Houston
The CHS–IAH corridor (Charleston, SC → Houston, TX) runs ahead of the national average, served by 11 carriers across roughly 925 miles.
Data updated 2026-06-13
- 82.4%
- On-time
- +3.4 pts
- vs US avg
- 75 min
- Delay when late
- 2,279
- Flights
Cancelled
2.8%
Best Month
Nov 2023 92%
Worst Month
Jul 2024 74%
Distance
925 mi
Carriers
11
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Jul 2025 | 30 | 4 | 1 | 0 | UA |
| Oct 2024 | 31 | 3 | 0 | 1 | UA |
| Aug 2024 | 44 | 8 | 2 | 0 | UA |
| Jul 2024 | 61 | 16 | 7 | 0 | OO,UA |
| Mar 2024 | 36 | 8 | 0 | 1 | UA |
| Feb 2024 | 30 | 6 | 0 | 0 | UA |
| Jan 2024 | 30 | 8 | 4 | 0 | UA |
| Dec 2023 | 50 | 5 | 0 | 0 | OO,UA |
| Nov 2023 | 59 | 5 | 0 | 0 | OO,UA |
| Sep 2023 | 30 | 10 | 0 | 0 | UA |
| Aug 2023 | 31 | 13 | 1 | 0 | UA |
| Jul 2023 | 31 | 15 | 1 | 0 | UA |
| Jun 2023 | 30 | 12 | 1 | 0 | UA |
| May 2023 | 31 | 10 | 2 | 0 | UA |
| Mar 2023 | 30 | 11 | 1 | 0 | UA |
| Jan 2023 | 31 | 6 | 0 | 0 | UA |
| Dec 2022 | 31 | 6 | 0 | 0 | YV,UA |
| Nov 2022 | 30 | 7 | 0 | 0 | YV |
| Oct 2022 | 31 | 2 | 0 | 0 | OO,YV |
| Sep 2022 | 30 | 5 | 2 | 0 | YV |
| Aug 2022 | 30 | 8 | 2 | 0 | YV |
| Jul 2022 | 31 | 7 | 0 | 0 | YV |
| Jun 2022 | 32 | 8 | 0 | 0 | OO,YV |
| May 2022 | 62 | 6 | 0 | 0 | OO,YV |
Cancellation Rate
2.8%
24 of 862 flights
Diversion Rate
0.2%
2 of 862 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
CHS - Charleston
Full on-time, delay-cause, and seasonal performance for Charleston, SC.
Origin airport →IAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
Destination airport →Compare the two airports
See CHS and IAH side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to CHS–IAH.
Routes with a similar on-time rate
What the Data Says About CHS to IAH
Bureau of Transportation Statistics records show Charleston to Houston (CHS to IAH) running a 82.4% on-time rate over 2,279 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 74.7 minutes. The 925-mile corridor is served by 11 carriers, and over the last 24 months 2.8% of 862 flights were cancelled, 0.2% diverted.
The monthly split is wide on this route: Nov 2023 posted the strongest performance at 92% on-time, while Jul 2024 came in at just 74% - a 18-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.