SkyWest Airlines is the most reliable airline on the PDX to ONT route with a 90% on-time rate, compared to Alaska Airlines at 84%. Based on 486 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: PDX to ONT
Portland to Ontario — airline reliability comparison
On-Time Rate by Airline
SkyWest Airlines90%
Frontier Airlines84%
Alaska Airlines84%
PDX to ONT Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| SkyWest AirlinesOOBest | 90% | 0.5% | 46m | 486 |
| Frontier AirlinesF9 | 84% | 1.2% | 77m | 336 |
| Alaska AirlinesASWorst | 84% | 2.3% | 45m | 1,033 |
Route Overview
86%
Overall On-Time
57m
Avg Delay
1.5%
Cancel Rate
1,945
Total Flights
Flying out of PDX? 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.