Denver to Chicago — airline reliability comparison
American Airlines is the most reliable airline on the DEN to ORD route with a 78% on-time rate, compared to Frontier Airlines at 60%. Based on 4,212 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 |
|---|---|---|---|---|
| American AirlinesAABest | 78% | 1.3% | 110m | 4,212 |
| United AirlinesUA | 76% | 0.9% | 74m | 12,785 |
| MQ | 75% | 0.0% | 54m | 108 |
| Southwest AirlinesWN | 73% | 1.1% | 54m | 4,563 |
| Frontier AirlinesF9Worst | 60% | 1.6% | 88m | 830 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.