Chicago to Portland — airline reliability comparison
United Airlines is the most reliable airline on the ORD to PDX route with a 80% on-time rate, compared to Spirit Airlines at 35%. Based on 4,799 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% | 1.0% | 67m | 4,799 |
| Alaska AirlinesAS | 79% | 1.8% | 59m | 1,761 |
| American AirlinesAA | 71% | 1.1% | 79m | 1,705 |
| Spirit AirlinesNKWorst | 35% | 4.3% | 63m | 106 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.