Charleston (CHS) to Washington (IAD): On-Time Performance
Data through May 2026
When you fly CHS to IAD matters as much as anything else about the booking: the route swung from 97% on-time in October 2024 to just 72% in December 2025. Across the full period the route averages 88% on-time against a national 78%.
- On-time
- 88%
- arrived <15 min late
- Avg delay
- 10 min
- completed flights
- Cancelled
- 1.3%
- Flights/day
- 2.1
- last 12 months
- Duration
- 1h 37m
- scheduled
- Distance
- 442 mi
Best airline from CHS to IAD
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 90% | 10 min | 0.5% | 772 |
| Republic Airways | 86% | 11 min | 2.2% | 741 |
Monthly on-time trend
Best time to fly from CHS to IAD
Aim for departures around 10 a.m. (94% on-time); avoid 7 p.m. departures (74%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 87% | 12 min |
| Tuesday | 90% | 11 min |
| Wednesdaybest | 90% | 6 min |
| Thursday | 89% | 9 min |
| Friday | 86% | 12 min |
| Saturday | 89% | 9 min |
| Sunday | 84% | 14 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft65%
- Airline operations14%
- National airspace system19%
- Weather2%
Frequently asked questions
- How often are flights from CHS to IAD delayed?
- 12% of CHS–IAD 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 10 minutes.
- Which airline is most reliable from CHS to IAD?
- United Airlines has the best on-time record on this route at 90%, based on 772 flights. 2 airlines flew CHS–IAD frequently enough to compare in this period.
- What is the best time of day to fly from CHS to IAD?
- Departures around 10 a.m. have the best record (94% on-time), while departures around 7 p.m. have the worst (74%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from CHS to IAD?
- The scheduled CHS–IAD flight time averages 1h 37m over 442 miles. Actual arrival times vary — flights on this route land 15+ minutes late 12% of the time.
- How often are CHS to IAD flights cancelled?
- 1.3% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from CHS to IAD?
- December 2025 was the roughest month in this dataset, with only 72% of arrivals on time. The best was October 2024 at 97%. If your dates are flexible, that 25-point gap is worth planning around.
Explore related pages
More routes from CHS
Based on 1,513 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.