80% of flights from Fort Lauderdale to Washington arrived on time over the past 12 months. That is about the typical U.S. route. The 8 a.m. departures ran on time 87% of the time; the 5 p.m. ones 52%. Most reliable airline: United Airlines (85%). 8% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for FLL → IAD: when a flight was late, it was under 45 minutes late 52% of the time. About 1 in 16 flights landed an hour or more late, and 1 in 42 three hours or more; 1.4% were cancelled outright.
- On time or early80%
- 15–30 min late7.0%
- 30–60 min late5.0%
- 1–2 hours late3.0%
- 2–3 hours late1.0%
- 3+ hours late2.4%
- Diverted0.1%
- Cancelled1.4%
Share of all 803 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| United Airlines | 700 | 85% | 0.6% | −10 min | 4.0% | +79 min | United Airlines |
| Frontier Airlines | 103 | 45% | 6.8% | +18 min | 22.3% | +103 min | Frontier Airlines |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at FLL). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | United Airlines |
|---|---|
| 8 a.m. | 87% |
| noon | 86% |
Last flight of the day
On FLL → IAD, each airline's last flight of the day was cancelled 0.8% of the time, against 0.6% for its earlier flights (1.3× as often). It arrived 3+ hours late 1.2% of the time (earlier flights: 1.5%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.
| Airline | Last departure | Last: cancelled | Last: 3h+ late | Earlier: cancelled | Next morning |
|---|---|---|---|---|---|
| United Airlines | 12:13 p.m. | 0.8% | 1.2% | 0.6% | first flight 10:22 a.m. |
Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.
If you need to be in IAD tonight, book an earlier flight so there's a backup if it's cancelled.
By month
Each calendar month pooled over 2023–2026. Best: October (93%). Worst: August (74%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 124 | 81% | 3.2% |
| Tuesday | 98 | — | — |
| Wednesday | 92 | — | — |
| Thursday | 114 | 87% | 0.9% |
| Friday | 124 | 77% | 1.6% |
| Saturday | 125 | 78% | 0.8% |
| Sunday | 126 | 67% | 2.4% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: weather 9 · airline 2
Month by month
Not enough months with data to draw a trend.
Flight numbers on this route
Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.
| Flight | Departs | Flights | On time | Cancelled | Typical arrival | Operated by |
|---|---|---|---|---|---|---|
| UA 2169 | 9:00 a.m. | 193 | 87% | 0.5% | −10 min | United Airlines |
| UA 1421 | 12:13 p.m. | 159 | 89% | 0.0% | −10 min | United Airlines |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Jan 4, 2026 | 3 | 0% | 0 |
| Aug 3, 2026 | 3 | 33% | 0 |
| Jan 3, 2026 | 3 | 33% | 0 |
| Dec 27, 2025 | 3 | 33% | 0 |
| Mar 16, 2026 | 3 | 33% | 1 |
Nearby airport alternatives
Other ways to make the same trip, using airports within 60 miles of Fort Lauderdale or Washington. MIA → IAD has been 4 points more reliable.
| Route | Flights | On time | Cancelled |
|---|---|---|---|
| FLL → IAD (this route) | 803 | 80% | 1.4% |
| MIA → IAD Miami to Washington Dulles | 603 | 84% | 0.7% |
| PBI → BWI President Donald J. Trump to Baltimore/Washington | 1,141 | 80% | 1.5% |
| MIA → DCA Miami to Washington Reagan National | 3,954 | 74% | 2.1% |
| MIA → BWI Miami to Baltimore/Washington | 2,291 | 71% | 2.1% |
| FLL → BWI Fort Lauderdale to Baltimore/Washington | 3,150 | 69% | 3.0% |
| PBI → DCA President Donald J. Trump to Washington Reagan National | 1,690 | 68% | 2.1% |
Questions
How often are flights from FLL to IAD on time?
80% of 803 scheduled flights from Fort Lauderdale, FL to Washington, DC arrived within 15 minutes of schedule between September 2025 and August 2026. 1.4% were cancelled.
What is the best time of day to fly FLL to IAD?
Flights scheduled to leave at 8 a.m. were the most reliable (87% on time). The 5 p.m. departures were the least (52%).
Which airline is most on time from FLL to IAD?
United Airlines: 85% of its 700 flights on the route arrived on time. Frontier Airlines: 45%.
What month has the most delays from FLL to IAD?
August (74% on time). The best month is October (93%), over 2023–2026.
Is the last flight of the day from FLL to IAD more likely to be cancelled?
Yes. Each airline's last FLL–IAD flight of the day was cancelled 0.8% of the time over the past year, against 0.6% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.
Related
- IAD → FLL (return)
- Fort Lauderdale (FLL) delays by hour
- Flights into Washington Dulles (IAD)
- United Airlines on-time record
- Frontier Airlines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.