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Route · FLL → IAD · 2020–2025 BTS data

Fort Lauderdale to Washington

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), FLL to IAD (Fort Lauderdale to Washington) ranks #2587 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

87.5%
On-time
+8.5 pts
vs US avg
84 min
Delay when late
4,691
Flights
#2587 of 4927
Corpus placement

Cancelled

0.6%

Best Month

Nov 2024 95%

Worst Month

Mar 2024 77%

Distance

901 mi

Carriers

4

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 76 9 0 0 UA
Nov 2025 60 10 0 0 UA
Oct 2025 37 3 0 0 UA
Sep 2025 30 2 0 0 UA
Aug 2025 49 3 0 0 UA
Jul 2025 61 8 0 0 UA
Jun 2025 60 9 0 0 UA
May 2025 62 8 0 0 UA
Apr 2025 80 6 0 0 UA
Mar 2025 92 18 0 0 UA
Feb 2025 78 11 0 0 UA
Jan 2025 85 10 3 1 UA
Dec 2024 75 15 0 0 UA
Nov 2024 60 3 0 0 UA
Oct 2024 36 2 0 0 UA
Sep 2024 30 3 0 0 UA
Aug 2024 49 13 1 0 UA
Jul 2024 62 4 1 0 UA
Jun 2024 60 8 1 0 UA
May 2024 83 10 0 0 UA
Apr 2024 90 9 2 0 UA
Mar 2024 93 21 0 0 UA
Feb 2024 81 12 0 0 UA
Jan 2024 80 12 2 0 UA

FLL–IAD seasonal on-time pattern

Best: October (93.0%) · weakest: June (84.0%)

82%84%86%88%90%92%94% JanFebMarAprMayJunJulAugSepOctNovDec 87.6%

Strongest calendar month

October

93.0% on-time · ~58 flights/mo

Busiest calendar month

March

~84 flights/mo avg

Weakest calendar month

June

84.0% on-time · ~55 flights/mo

Cancellation Rate

0.6%

10 of 1,569 flights

Diversion Rate

0.1%

1 of 1,569 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

FLL - Fort Lauderdale

Full on-time, delay-cause, and seasonal performance for Fort Lauderdale, FL.

FLL on-time profile

IAD - Washington

Full on-time, delay-cause, and seasonal performance for Washington, DC.

IAD on-time profile

Compare the two airports

See FLL and IAD side by side on delays, cancellations, and reliability.

Compare FLL vs IAD

Origin-hub reliability standing

Among FLL's stronger departures

FLL → IAD posts a 87.5% on-time rate, landing in the ≥85% band with 1 of 62 BTS-tracked routes leaving Fort Lauderdale. The same hub also shows 32 mid-band and 29 challenged departures · fleet-wide on-time rank #509 of 4927 (highest on-time = #1).

What the Data Says About FLL to IAD

Fort Lauderdale to Washington (FLL to IAD) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.5% on-time rate across 4,691 flights, with delays that do happen averaging 84.4 minutes. The corridor runs roughly 901 miles and is served by 4 carriers. Over the most recent 24 months, 10 of 1,569 flights were cancelled (0.6%) and 1 diverted (0.1%).

The monthly split is wide on this route: Nov 2024 posted the strongest performance at 95% on-time, while Mar 2024 came in at just 77% - a 18-point swing worth factoring into travel timing.

On the multi-year calendar, FLL–IAD peaks in October at 93.0% on-time while March carries the heaviest traffic (~84 flights per month) ; the softest month is June at 84.0%, a 9.0-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does FLL to IAD rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, FLL to IAD ranks #2587 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from FLL to IAD? ▼
Flights from Fort Lauderdale to Washington have a 87.5% on-time rate based on 4,691 flights. The average delay is 84.4 minutes. The best recent month was Nov 2024 with 95% on-time.
What is the cancellation rate for FLL to IAD? ▼
Over the last 24 months, 0.6% of flights on this route were cancelled (10 of 1,569 flights) and 0.1% were diverted.
How far is the flight from FLL to IAD? ▼
The flight distance from Fort Lauderdale (FLL) to Washington (IAD) is approximately 901 miles. This route is served by 4 carriers.
When is the best time to fly from FLL to IAD? ▼
The best recent month for on-time performance was Nov 2024 (95% on-time). The worst was Mar 2024 (77% on-time). Consider booking during months with historically better performance.

Airports on this route

FLL Airport

Fort Lauderdale
IAD Airport

Washington
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using FLL–IAD data

FLL–IAD runs 8.5 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare FLL and IAD airport profiles: delay causes and top routes differ even on the same corridor. FLL airport
  • If your dates flex, October (93.0% on-time) beats June (84.0%) on this corridor. Seasonal chart
  • 4 other routes post a similar 87.5% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.