Route · IAH → CHS · 2020–2025 BTS data
Houston to Charleston
The IAH–CHS corridor (Houston, TX → Charleston, SC) runs ahead of the national average, served by 10 carriers across roughly 925 miles.
Data updated 2026-06-13
- 79.8%
- On-time
- +0.8 pts
- vs US avg
- 65 min
- Delay when late
- 2,188
- Flights
Cancelled
2.1%
Best Month
Apr 2022 87%
Worst Month
Jul 2024 49%
Distance
925 mi
Carriers
10
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Jul 2025 | 30 | 21 | 1 | 0 | UA |
| Oct 2024 | 31 | 7 | 0 | 0 | UA |
| Aug 2024 | 44 | 19 | 2 | 0 | UA |
| Jul 2024 | 61 | 31 | 3 | 0 | OO,UA |
| Mar 2024 | 36 | 10 | 0 | 0 | UA |
| Jan 2024 | 30 | 9 | 4 | 0 | UA |
| Dec 2023 | 49 | 7 | 0 | 0 | OO,UA |
| Nov 2023 | 59 | 9 | 0 | 0 | OO,UA |
| Aug 2023 | 31 | 5 | 1 | 1 | UA |
| Jul 2023 | 31 | 10 | 1 | 1 | UA |
| Jun 2023 | 30 | 7 | 1 | 0 | UA |
| May 2023 | 31 | 5 | 2 | 0 | UA |
| Mar 2023 | 30 | 8 | 0 | 0 | UA |
| Jan 2023 | 31 | 3 | 0 | 0 | UA |
| Dec 2022 | 31 | 5 | 0 | 0 | YV,UA |
| Nov 2022 | 30 | 5 | 0 | 0 | YV |
| Oct 2022 | 31 | 2 | 0 | 0 | OO,YV |
| Sep 2022 | 30 | 2 | 2 | 0 | YV |
| Aug 2022 | 30 | 4 | 1 | 1 | YV |
| Jul 2022 | 31 | 4 | 0 | 0 | YV |
| Jun 2022 | 32 | 11 | 0 | 0 | OO,YV |
| May 2022 | 62 | 13 | 1 | 0 | OO,YV |
| Apr 2022 | 60 | 8 | 0 | 0 | YV |
| Mar 2022 | 36 | 9 | 0 | 0 | OO,YV |
Cancellation Rate
2.1%
19 of 897 flights
Diversion Rate
0.3%
3 of 897 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
IAH - Houston
Full on-time, delay-cause, and seasonal performance for Houston, TX.
Origin airport →CHS - Charleston
Full on-time, delay-cause, and seasonal performance for Charleston, SC.
Destination airport →Compare the two airports
See IAH and CHS side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to IAH–CHS.
Routes with a similar on-time rate
What the Data Says About IAH to CHS
2,188 tracked flights put the IAH to CHS pairing (Houston to Charleston) at a 79.8% on-time rate, squarely in line with the wider network. Delays that do occur run 65.1 minutes on average. Across the 925-mile route and its 10 carriers, the trailing 24 months show 2.1% cancelled and 0.3% diverted (897 flights sampled).
The monthly split is wide on this route: Apr 2022 posted the strongest performance at 87% on-time, while Jul 2024 came in at just 49% - a 38-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.