Best Time to Fly SEA to TPA: On-Time Stats by Hour & Airline
Seattle/Tacoma International → Tampa International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 79.9% of Seattle (SEA) to Tampa (TPA) flights arrived on time (975 scheduled flights). That is 2.3 points above the national average of 77.6%.
Among 2 airlines, Alaska Airlines led with 81.1% on time and Delta Air Lines was last with 77.9%.
Over 24 months, Tuesday was the most reliable day (79% on time) and July the worst month (62%).
The cancellation rate was 0.5% (US average 1.8%).
SEA to TPA on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Alaska Airlines | 81.1% | 46 min | 0.5% | 612 |
| Delta Air Lines | 77.9% | 57 min | 0.6% | 363 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SEA to TPA
On-time arrival % by scheduled departure hour (local time), 1,986 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 91.3% | 0.6% | 163 |
| 9am–10am | 71.7% | 1.5% | 531 |
| 10am–11am | 82.3% | 1.4% | 279 |
| 11am–12pm | 72.8% | 0.5% | 402 |
| 12pm–1pm | 87.3% | 0.0% | 79 |
| 8pm–9pm | Limited data | 1 | |
| 9pm–10pm | 76.8% | 0.5% | 411 |
| 10pm–11pm | 55.6% | 1.1% | 91 |
| 11pm–12am | Limited data | 29 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SEA to TPA
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 86.8% | +7.0 pts | 0.0% | 38 |
| Christmas & New Year (Dec 20 - Jan 3) | 75.3% | -4.6 pts | 1.1% | 90 |
| Summer peak (Jun 15 - Aug 15) | 61.2% | -18.7 pts | 0.8% | 371 |
| All other days | 79.9% | — | 0.9% | 1,487 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).