Phoenix to San Francisco — airline reliability comparison
United Airlines is the most reliable airline on the PHX to SFO route with a 77% on-time rate, compared to Southwest Airlines at 65%. Based on 4,705 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 |
|---|---|---|---|---|
| United AirlinesUABest | 77% | 0.6% | 71m | 4,705 |
| SkyWest AirlinesOO | 73% | 0.3% | 58m | 1,972 |
| Frontier AirlinesF9 | 73% | 1.6% | 68m | 1,339 |
| American AirlinesAA | 71% | 0.5% | 76m | 4,568 |
| Alaska AirlinesAS | 68% | 11.1% | 42m | 167 |
| MQ | 68% | 0.0% | 46m | 37 |
| Southwest AirlinesWNWorst | 65% | 0.3% | 54m | 3,860 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.