Portland to San Francisco — airline reliability comparison
SkyWest Airlines is the most reliable airline on the PDX to SFO route with a 79% on-time rate, compared to Frontier Airlines at 50%. Based on 2,005 flights tracked.
This route involves 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 |
|---|---|---|---|---|
| SkyWest AirlinesOOBest | 79% | 0.9% | 62m | 2,005 |
| United AirlinesUA | 74% | 0.8% | 67m | 6,224 |
| Alaska AirlinesAS | 72% | 1.1% | 51m | 3,994 |
| Frontier AirlinesF9Worst | 50% | 2.0% | 68m | 240 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.