IAD to FLL flight delays & on-time performance
Nonstop flights from Washington Dulles International Airport to Fort Lauderdale Hollywood International Airport · 901 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at IAD or FLL right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Washington (IAD) to Fort Lauderdale (FLL) arrived on time 81% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.8% were cancelled, and 8% arrived an hour or more late.
- United Airlines was the most punctual airline here (84% on time); Frontier Airlines was the least (50%).
- Departures scheduled around 7pm did best (89% on time); around 6pm did worst (61%).
- Wednesday was the most reliable day to fly (87% on time) and Sunday the least (78%).
- The largest source of delay minutes was late-arriving aircraft (43%).
Which airline is most on time from IAD to FLL?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 84% | 0.6% | 12 min | 6.4% | 709 |
| Frontier Airlines | 50% | 2.8% | 43 min | 27.1% | 72 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am89%238 flights
- 1pm82%142 flights
- 5pm75%252 flights
- 6pm61%51 flights
- 7pm89%92 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday81%0.8% cancelled
- Tuesday86%1.1% cancelled
- Wednesday87%0.0% cancelled
- Thursday80%0.9% cancelled
- Friday78%0.0% cancelled
- Saturday79%0.8% cancelled
- Sunday78%1.6% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft43%
- Air traffic control & airport congestion34%
- Airline (crew, maintenance, cleaning, fueling)20%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Air traffic control & airport congestion0%
- Security0%
IAD to FLL: common questions
- How often are IAD to FLL flights on time?
- 81% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Washington to Fort Lauderdale cancelled?
- 0.8% of scheduled flights were cancelled (6 of 781).
- How long are typical delays?
- Across all flights the average arrival delay was 15 min (early arrivals count as zero). Flights that were late arrived 73 min behind schedule on average, and 8.3% of flights were an hour or more late.
- How long is taxi time at IAD?
- Flights on this route spent 23 min taxiing from the gate to takeoff on average.
Related routes
Return trip: FLL to IAD — 84% on time
More flights from Washington
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: IAD → FLL, nonstop flights by US airlines that report to the DOT. How we calculate this.