Southwest Airlines is the most reliable airline on the BWI to PHX route with a 75% on-time rate, compared to Frontier Airlines at 72%. Based on 4,052 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: BWI to PHX
Baltimore to Phoenix — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines75%
Frontier Airlines72%
BWI to PHX Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 75% | 0.7% | 52m | 4,052 |
| Frontier AirlinesF9Worst | 72% | 0.8% | 94m | 337 |
Route Overview
76%
Overall On-Time
56m
Avg Delay
0.7%
Cancel Rate
4,392
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.