Boston to Phoenix — airline reliability comparison
American Airlines is the most reliable airline on the BOS to PHX route with a 83% on-time rate, compared to Spirit Airlines at 50%. Based on 4,594 flights tracked.
This route involves weather-prone airports, which can affect reliability regardless of airline.
Source: Bureau of Transportation Statistics. Updated October 2026.| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| American AirlinesAABest | 83% | 0.6% | 90m | 4,594 |
| Delta Air LinesDL | 75% | 1.1% | 68m | 1,422 |
| JetBlue AirwaysB6 | 68% | 1.1% | 66m | 1,336 |
| Spirit AirlinesNKWorst | 50% | 9.1% | 73m | 22 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.