Houston to Chicago — airline reliability comparison
United Airlines is the most reliable airline on the IAH to ORD route with a 80% on-time rate, compared to Frontier Airlines at 59%. Based on 13,392 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 | 80% | 0.9% | 69m | 13,392 |
| American AirlinesAA | 76% | 1.9% | 96m | 2,455 |
| MQ | 75% | 0.9% | 81m | 704 |
| Republic AirwaysYX | 73% | 4.3% | 94m | 566 |
| Spirit AirlinesNK | 67% | 2.6% | 72m | 1,495 |
| Frontier AirlinesF9Worst | 59% | 4.3% | 123m | 479 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.