Best Time to Fly TPA to SEA: On-Time Stats by Hour & Airline
Tampa International → Seattle/Tacoma International
Data through July 2026 · Last updated October 18, 2026
975 flights were scheduled from Tampa (TPA) to Seattle (SEA) in the last 12 months, and 75.0% of those that flew arrived on time, 2.6 points below the US average of 77.6%.
Among 2 airlines, Delta Air Lines led with 86.9% on time and Alaska Airlines was last with 67.9%.
Over 24 months, Wednesday was the most reliable day (78% on time) and February the worst month (68%).
The cancellation rate was 0.9% (US average 1.8%).
TPA to SEA 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 |
|---|---|---|---|---|
| Delta Air Lines | 86.9% | 45 min | 0.8% | 363 |
| Alaska Airlines | 67.9% | 50 min | 1.0% | 612 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly TPA to SEA
On-time arrival % by scheduled departure hour (local time), 1,985 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 75.7% | 1.0% | 796 |
| 8am–9am | 86.2% | 0.4% | 255 |
| 9am–10am | 85.0% | 1.7% | 292 |
| 5pm–6pm | 77.5% | 0.0% | 40 |
| 6pm–7pm | 60.6% | 1.9% | 538 |
| 7pm–8pm | 65.1% | 1.6% | 64 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on TPA to SEA
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) | 63.2% | -11.5 pts | 0.0% | 38 |
| Christmas & New Year (Dec 20 - Jan 3) | 78.4% | +3.8 pts | 1.1% | 89 |
| Summer peak (Jun 15 - Aug 15) | 72.0% | -2.6 pts | 1.1% | 371 |
| All other days | 74.6% | — | 1.3% | 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).