Southwest Airlines is the most reliable airline on the BWI to PWM route with a 77% on-time rate. Based on 4,606 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: BWI to PWM
Baltimore to Portland — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines77%
BWI to PWM Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 77% | 1.5% | 47m | 4,606 |
Route Overview
77%
Overall On-Time
47m
Avg Delay
1.4%
Cancel Rate
4,606
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.