Best Airline: IAD to ORD
Washington to Chicago — airline reliability comparison
United Airlines is the most reliable airline on the IAD to ORD route with a 80% on-time rate. Based on 6,553 flights tracked.
This route involves weather-prone airports and high-congestion airports, which can affect reliability regardless of airline.
Source: Bureau of Transportation Statistics. Updated October 2026.IAD to ORD Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|
| United AirlinesUABest | 80% | 0.9% | 65m | 6,553 |
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.