Seattle to Chicago — airline reliability comparison
United Airlines is the most reliable airline on the SEA to ORD route with a 84% on-time rate, compared to Alaska Airlines at 77%. Based on 5,445 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.| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| United AirlinesUABest | 84% | 1.0% | 84m | 5,445 |
| Delta Air LinesDL | 80% | 0.9% | 66m | 3,259 |
| American AirlinesAA | 77% | 1.2% | 105m | 3,286 |
| Alaska AirlinesASWorst | 77% | 0.8% | 51m | 6,526 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.