United Airlines is the most reliable airline on the IAD to CHS route with a 90% on-time rate, compared to Republic Airways at 88%. Based on 1,250 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: IAD to CHS
Washington to Charleston — airline reliability comparison
On-Time Rate by Airline
United Airlines90%
Republic Airways88%
IAD to CHS Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| United AirlinesUABest | 90% | 1.0% | 73m | 1,250 |
| Republic AirwaysYXWorst | 88% | 1.3% | 52m | 1,193 |
Route Overview
89%
Overall On-Time
70m
Avg Delay
1.2%
Cancel Rate
2,476
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.