Best Time to Fly FLL to SEA: On-Time Stats by Hour & Airline
Fort Lauderdale-Hollywood International → Seattle/Tacoma International
Data through July 2026 · Last updated October 18, 2026
826 flights were scheduled from Fort Lauderdale (FLL) to Seattle (SEA) in the last 12 months, and 71.2% of those that flew arrived on time, 6.4 points below the US average of 77.6%.
Among 2 airlines, Delta Air Lines led with 76.7% on time and Alaska Airlines was last with 66.8%.
Over 24 months, Saturday was the most reliable day (78% on time) and December the worst month (57%).
The cancellation rate was 1.2% (US average 1.8%).
FLL 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 | 76.7% | 57 min | 1.4% | 364 |
| Alaska Airlines | 66.8% | 51 min | 1.1% | 462 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly FLL to SEA
On-time arrival % by scheduled departure hour (local time), 1,695 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 75.3% | 1.5% | 273 |
| 8am–9am | 74.6% | 1.4% | 287 |
| 10am–11am | 89.0% | 0.8% | 129 |
| 5pm–6pm | 66.0% | 1.4% | 146 |
| 6pm–7pm | 69.2% | 1.1% | 860 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on FLL 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) | 48.6% | -25.6 pts | 2.7% | 37 |
| Christmas & New Year (Dec 20 - Jan 3) | 60.2% | -14.0 pts | 1.1% | 90 |
| Summer peak (Jun 15 - Aug 15) | 70.0% | -4.2 pts | 2.4% | 248 |
| All other days | 74.2% | — | 0.9% | 1,320 |
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).