Delta Air Lines is the most reliable airline on the BWI to SLC route with a 84% on-time rate, compared to Southwest Airlines at 78%. Based on 1,297 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: BWI to SLC
Baltimore to Salt Lake City — airline reliability comparison
On-Time Rate by Airline
Delta Air Lines84%
Southwest Airlines78%
BWI to SLC Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Delta Air LinesDLBest | 84% | 1.2% | 66m | 1,297 |
| Southwest AirlinesWNWorst | 78% | 0.7% | 53m | 1,144 |
Route Overview
80%
Overall On-Time
58m
Avg Delay
1%
Cancel Rate
2,495
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.