Delta Air Lines is the most reliable airline on the SEA to BNA route with a 83% on-time rate, compared to Southwest Airlines at 65%. Based on 1,505 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: SEA to BNA
Seattle to Nashville — airline reliability comparison
On-Time Rate by Airline
Delta Air Lines83%
Alaska Airlines78%
Southwest Airlines65%
SEA to BNA Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Delta Air LinesDLBest | 83% | 0.4% | 55m | 1,505 |
| Alaska AirlinesAS | 78% | 0.8% | 41m | 3,100 |
| Southwest AirlinesWNWorst | 65% | 0.0% | 44m | 185 |
Route Overview
79%
Overall On-Time
45m
Avg Delay
0.6%
Cancel Rate
4,817
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.