United Airlines is the most reliable airline on the IAD to MCI route with a 79% on-time rate, compared to Republic Airways at 79%. Based on 74 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: IAD to MCI
Washington to Kansas City — airline reliability comparison
On-Time Rate by Airline
United Airlines79%
Republic Airways79%
IAD to MCI Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| United AirlinesUABest | 79% | 1.1% | 123m | 74 |
| Republic AirwaysYXWorst | 79% | 0.0% | 77m | 72 |
Route Overview
79%
Overall On-Time
110m
Avg Delay
0.7%
Cancel Rate
146
Total Flights
Flying out of IAD? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.