Best Time to Fly SEA to FLL: On-Time Stats by Hour & Airline
Seattle/Tacoma International → Fort Lauderdale-Hollywood International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 77.9% of Seattle (SEA) to Fort Lauderdale (FLL) flights arrived on time (826 scheduled flights). That is in line with the national average of 77.6%.
Alaska Airlines was the most punctual of the 2 airlines on the route at 80.4%, while Delta Air Lines trailed at 74.7%.
October has been the best month (91% on time) and Friday the weakest day of the week (74%).
0.7% of flights were cancelled, versus 1.8% nationally.
SEA to FLL 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 | 80.4% | 44 min | 0.2% | 462 |
| Delta Air Lines | 74.7% | 47 min | 1.4% | 364 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SEA to FLL
On-time arrival % by scheduled departure hour (local time), 1,693 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 85.3% | 0.8% | 256 |
| 8am–9am | 80.4% | 0.6% | 787 |
| 9am–10am | Limited data | 3 | |
| 11am–12pm | 65.2% | 2.1% | 188 |
| 12pm–1pm | 86.4% | 0.0% | 88 |
| 1pm–2pm | 80.5% | 1.5% | 135 |
| 8pm–9pm | Limited data | 1 | |
| 9pm–10pm | 74.0% | 0.0% | 100 |
| 10pm–11pm | 81.5% | 0.0% | 54 |
| 11pm–12am | 88.9% | 0.0% | 81 |
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 FLL
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) | 72.2% | -10.3 pts | 0.0% | 36 |
| Christmas & New Year (Dec 20 - Jan 3) | 58.4% | -24.1 pts | 1.1% | 90 |
| Summer peak (Jun 15 - Aug 15) | 75.0% | -7.5 pts | 2.4% | 248 |
| All other days | 82.5% | — | 0.5% | 1,319 |
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).