Route · IAD → CHS · 2020–2025 BTS data
Washington to Charleston
The IAD–CHS corridor (Washington, DC → Charleston, SC) runs ahead of the national average, served by 11 carriers across roughly 441 miles.
Data updated 2026-06-13
- 85.8%
- On-time
- +6.8 pts
- vs US avg
- 71 min
- Delay when late
- 4,289
- Flights
Cancelled
1.0%
Best Month
Mar 2024 100%
Worst Month
Dec 2025 75%
Distance
441 mi
Carriers
11
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 57 | 14 | 1 | 0 | YX,UA |
| Nov 2025 | 61 | 6 | 0 | 0 | UA,YX |
| Oct 2025 | 51 | 4 | 0 | 0 | UA,YX |
| Sep 2025 | 50 | 3 | 0 | 0 | UA,YX |
| Aug 2025 | 58 | 7 | 0 | 0 | YX,UA |
| Jul 2025 | 63 | 10 | 1 | 0 | UA,YX |
| Jun 2025 | 60 | 8 | 0 | 0 | UA,YX |
| May 2025 | 66 | 13 | 0 | 0 | UA,YX |
| Apr 2025 | 76 | 8 | 0 | 0 | UA,YX |
| Mar 2025 | 68 | 4 | 0 | 0 | YX,UA |
| Feb 2025 | 56 | 3 | 1 | 0 | UA,YX |
| Jan 2025 | 62 | 11 | 9 | 0 | YX |
| Dec 2024 | 62 | 8 | 0 | 0 | UA,YX |
| Nov 2024 | 59 | 2 | 0 | 0 | YX,UA |
| Oct 2024 | 62 | 2 | 0 | 0 | UA,YX |
| Sep 2024 | 60 | 4 | 0 | 0 | YX,UA |
| Aug 2024 | 62 | 4 | 2 | 0 | YX,UA |
| Jul 2024 | 62 | 6 | 1 | 0 | UA,YX |
| Jun 2024 | 60 | 2 | 0 | 0 | UA,YX |
| May 2024 | 65 | 3 | 0 | 0 | YX,UA |
| Apr 2024 | 57 | 5 | 0 | 0 | YX |
| Mar 2024 | 62 | 0 | 0 | 0 | YX |
| Feb 2024 | 56 | 5 | 0 | 0 | YX |
| Jan 2024 | 59 | 13 | 0 | 1 | YX |
Cancellation Rate
1.0%
15 of 1,454 flights
Diversion Rate
0.1%
1 of 1,454 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
IAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
Origin airport →CHS - Charleston
Full on-time, delay-cause, and seasonal performance for Charleston, SC.
Destination airport →Compare the two airports
See IAD 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 IAD–CHS.
Routes with a similar on-time rate
What the Data Says About IAD to CHS
Washington to Charleston (IAD to CHS) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.8% on-time rate across 4,289 flights, with delays that do happen averaging 71.3 minutes. The corridor runs roughly 441 miles and is served by 11 carriers. Over the most recent 24 months, 15 of 1,454 flights were cancelled (1.0%) and 1 diverted (0.1%).
The monthly split is wide on this route: Mar 2024 posted the strongest performance at 100% on-time, while Dec 2025 came in at just 75% - a 25-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.