Atlanta to Phoenix — airline reliability comparison
Southwest Airlines is the most reliable airline on the ATL to PHX route with a 80% on-time rate, compared to Frontier Airlines at 58%. Based on 2,040 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 |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 80% | 0.3% | 54m | 2,040 |
| American AirlinesAA | 79% | 0.5% | 108m | 2,348 |
| Delta Air LinesDL | 78% | 0.8% | 54m | 8,109 |
| Frontier AirlinesF9Worst | 58% | 1.4% | 89m | 741 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.