Fort Lauderdale (FLL) to Seattle (SEA): On-Time Performance
Data through July 2026
When you fly FLL to SEA matters as much as anything else about the booking: the route swung from 92% on-time in June 2026 to just 47% in December 2025. Across the full period the route averages 72% on-time against a national 78%. Morning departures also hold up better than evening ones (77% vs 68%), which matters most in the rough months.
- On-time
- 72%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 1.3%
- Flights/day
- 2.3
- last 12 months
- Duration
- 6h 41m
- scheduled
- Distance
- 2,717 mi
Best airline from FLL to SEA
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 74% | 18 min | 1.5% | 758 |
| Alaska Airlines | 70% | 16 min | 1.1% | 999 |
Monthly on-time trend
Best time to fly from FLL to SEA
Aim for departures around 10 a.m. (89% on-time); avoid 5 p.m. departures (66%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 70% | 18 min |
| Tuesday | 72% | 18 min |
| Wednesday | 72% | 18 min |
| Thursday | 76% | 14 min |
| Friday | 71% | 17 min |
| Saturdaybest | 78% | 13 min |
| Sunday | 64% | 23 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft40%
- Airline operations28%
- National airspace system26%
- Weather6%
- Security1%
Frequently asked questions
- How often are flights from FLL to SEA delayed?
- 28% of FLL–SEA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 17 minutes.
- Which airline is most reliable from FLL to SEA?
- Delta Air Lines has the best on-time record on this route at 74%, based on 758 flights. 2 airlines flew FLL–SEA frequently enough to compare in this period.
- What is the best time of day to fly from FLL to SEA?
- Departures around 10 a.m. have the best record (89% on-time), while departures around 5 p.m. have the worst (66%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from FLL to SEA?
- The scheduled FLL–SEA flight time averages 6h 41m over 2,717 miles. Actual arrival times vary — flights on this route land 15+ minutes late 28% of the time.
- How often are FLL to SEA flights cancelled?
- 1.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from FLL to SEA?
- December 2025 was the roughest month in this dataset, with only 47% of arrivals on time. The best was June 2026 at 92%. If your dates are flexible, that 45-point gap is worth planning around.
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Based on 1,757 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.