Washington (IAD) to Fort Lauderdale (FLL): On-Time Performance
Data through July 2026
Washington (IAD) to Fort Lauderdale (FLL) effectively runs on two schedules. In November 2024, 97% of arrivals were on time; in July 2026 that fell to 56% — a 41-point seasonal swing. Across the full period the route averages 81% on-time against a national 78%. Morning departures also hold up better than evening ones (87% vs 76%), which matters most in the rough months.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 2.1
- last 12 months
- Duration
- 2h 48m
- scheduled
- Distance
- 901 mi
Best airline from IAD to FLL
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 83% | 14 min | 0.6% | 1,539 |
| Frontier Airlines | 50% | 43 min | 2.8% | 72 |
Monthly on-time trend
Best time to fly from IAD to FLL
Aim for departures around 7 p.m. (89% on-time); avoid 6 p.m. departures (64%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 81% | 15 min |
| Tuesdaybest | 86% | 13 min |
| Wednesday | 83% | 10 min |
| Thursday | 82% | 13 min |
| Friday | 78% | 16 min |
| Saturday | 82% | 15 min |
| Sunday | 75% | 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 aircraft41%
- Airline operations19%
- National airspace system33%
- Weather8%
Frequently asked questions
- How often are flights from IAD to FLL delayed?
- 19% of IAD–FLL 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 15 minutes.
- Which airline is most reliable from IAD to FLL?
- United Airlines has the best on-time record on this route at 83%, based on 1,539 flights. 2 airlines flew IAD–FLL frequently enough to compare in this period.
- What is the best time of day to fly from IAD to FLL?
- Departures around 7 p.m. have the best record (89% on-time), while departures around 6 p.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 IAD to FLL?
- The scheduled IAD–FLL flight time averages 2h 48m over 901 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are IAD to FLL flights cancelled?
- 0.7% 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 IAD to FLL?
- July 2026 was the roughest month in this dataset, with only 56% of arrivals on time. The best was November 2024 at 97%. If your dates are flexible, that 41-point gap is worth planning around.
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Based on 1,611 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.