Delta Air Lines is the most reliable airline on the SEA to TPA route with a 80% on-time rate, compared to Alaska Airlines at 77%. Based on 1,286 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: SEA to TPA
Seattle to Tampa — airline reliability comparison
On-Time Rate by Airline
Delta Air Lines80%
Alaska Airlines77%
SEA to TPA Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Delta Air LinesDLBest | 80% | 0.9% | 59m | 1,286 |
| Alaska AirlinesASWorst | 77% | 1.1% | 45m | 2,412 |
Route Overview
78%
Overall On-Time
49m
Avg Delay
1%
Cancel Rate
3,698
Total Flights
Flying out of SEA? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.