Delta Air Lines is the most reliable airline on the BNA to SEA route with a 88% on-time rate, compared to Southwest Airlines at 48%. Based on 1,505 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: BNA to SEA
Nashville to Seattle — airline reliability comparison
On-Time Rate by Airline
Delta Air Lines88%
Alaska Airlines78%
Southwest Airlines48%
BNA to SEA Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Delta Air LinesDLBest | 88% | 0.5% | 63m | 1,505 |
| Alaska AirlinesAS | 78% | 1.3% | 49m | 3,099 |
| Southwest AirlinesWNWorst | 48% | 0.6% | 52m | 185 |
Route Overview
80%
Overall On-Time
53m
Avg Delay
1%
Cancel Rate
4,816
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.