Seattle (SEA) to Fort Lauderdale (FLL): On-Time Performance
Data through May 2026
The calendar drives reliability on SEA–FLL. October 2024 flights landed on schedule 92% of the time, but December 2025 dropped to 64% — a gap of 28 points. Across the full period the route averages 80% on-time against a national 78%.
- On-time
- 80%
- arrived <15 min late
- Avg delay
- 11 min
- completed flights
- Cancelled
- 0.9%
- Flights/day
- 2.3
- last 12 months
- Duration
- 5h 53m
- scheduled
- Distance
- 2,717 mi
Best airline from SEA to FLL
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Alaska Airlinesmost reliable | 82% | 10 min | 0.5% | 966 |
| Delta Air Lines | 77% | 13 min | 1.4% | 727 |
Monthly on-time trend
Best time to fly from SEA to FLL
Aim for departures around 11 p.m. (89% on-time); avoid 11 a.m. departures (64%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 77% | 11 min |
| Tuesday | 82% | 9 min |
| Wednesdaybest | 88% | 7 min |
| Thursday | 80% | 14 min |
| Friday | 77% | 12 min |
| Saturday | 80% | 10 min |
| Sunday | 75% | 15 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft15%
- Airline operations43%
- National airspace system39%
- Weather3%
Frequently asked questions
- How often are flights from SEA to FLL delayed?
- 20% of SEA–FLL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 11 minutes.
- Which airline is most reliable from SEA to FLL?
- Alaska Airlines has the best on-time record on this route at 82%, based on 966 flights. 2 airlines flew SEA–FLL frequently enough to compare in this period.
- What is the best time of day to fly from SEA to FLL?
- Departures around 11 p.m. have the best record (89% on-time), while departures around 11 a.m. have the worst (64%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SEA to FLL?
- The scheduled SEA–FLL flight time averages 5h 53m over 2,717 miles. Actual arrival times vary — flights on this route land 15+ minutes late 20% of the time.
- How often are SEA to FLL flights cancelled?
- 0.9% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from SEA to FLL?
- December 2025 was the roughest month in this dataset, with only 64% of arrivals on time. The best was October 2024 at 92%. If your dates are flexible, that 28-point gap is worth planning around.
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Based on 1,693 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.