PlainFlights

Route · SEA → FLL · 2020–2025 BTS data

Seattle to Fort Lauderdale

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SEA to FLL (Seattle to Fort Lauderdale) ranks #2730 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

80.8%
On-time
+1.8 pts
vs US avg
60 min
Delay when late
4,396
Flights
#2730 of 4927
Corpus placement

Cancelled

1.8%

Best Month

Oct 2024 92%

Worst Month

Dec 2025 65%

Distance

2,717 mi

Carriers

6

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 93 33 1 0 DL,AS
Nov 2025 66 17 0 2 AS,DL
Oct 2025 62 6 0 0 AS,DL
Sep 2025 60 5 0 1 DL,AS
Aug 2025 62 12 0 0 AS,DL
Jul 2025 62 16 3 2 AS,DL
Jun 2025 60 11 0 0 AS,DL
May 2025 72 11 0 0 AS,DL
Apr 2025 83 17 0 0 AS,DL
Mar 2025 86 11 1 0 AS,DL
Feb 2025 76 12 0 0 AS,DL
Jan 2025 85 22 0 0 AS,DL
Dec 2024 92 22 0 0 AS,DL
Nov 2024 68 10 0 0 AS,DL
Oct 2024 61 5 1 0 AS,DL
Sep 2024 60 6 0 1 AS,DL
Aug 2024 62 13 2 0 AS,DL
Jul 2024 62 11 2 0 AS,DL
Jun 2024 60 12 1 1 AS,DL
May 2024 77 11 0 0 AS,DL
Apr 2024 89 19 0 1 AS,DL
Mar 2024 93 26 0 1 AS,DL
Feb 2024 87 9 0 0 AS,DL
Jan 2024 93 10 21 0 AS,DL

SEA–FLL seasonal on-time pattern

Best: October (89.5%) · weakest: December (73.9%)

70%75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 73.9%

Strongest calendar month

October

89.5% on-time · ~54 flights/mo

Busiest calendar month

March

~81 flights/mo avg

Weakest calendar month

December

73.9% on-time · ~80 flights/mo

Cancellation Rate

1.8%

32 of 1,771 flights

Diversion Rate

0.5%

9 of 1,771 flights

Explore origin & destination

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

SEA - Seattle

Full on-time, delay-cause, and seasonal performance for Seattle, WA.

SEA on-time profile

FLL - Fort Lauderdale

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

FLL on-time profile

Compare the two airports

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

Compare SEA vs FLL

Origin-hub reliability standing

Mid-pack among SEA departures

From SEA, this corridor sits with 63 other 75–85% on-time routes out of 89 tracked departures, not the hub's reliability leaders (25 at ≥85%) and not the softest ( 1 below 75%). Destination: Fort Lauderdale · fleet on-time rank #2831 of 4927.

What the Data Says About SEA to FLL

4,396 tracked flights put the SEA to FLL pairing (Seattle to Fort Lauderdale) at a 80.8% on-time rate, squarely in line with the wider network. Delays that do occur run 59.8 minutes on average. Across the 2,717-mile route and its 6 carriers, the trailing 24 months show 1.8% cancelled and 0.5% diverted (1,771 flights sampled).

The monthly split is wide on this route: Oct 2024 posted the strongest performance at 92% on-time, while Dec 2025 came in at just 65% - a 27-point swing worth factoring into travel timing.

On the multi-year calendar, SEA–FLL peaks in October at 89.5% on-time while March carries the heaviest traffic (~81 flights per month) ; the softest month is December at 73.9%, a 15.6-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SEA to FLL rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SEA to FLL ranks #2730 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 SEA to FLL? ▼
Flights from Seattle to Fort Lauderdale have a 80.8% on-time rate based on 4,396 flights. The average delay is 59.8 minutes. The best recent month was Oct 2024 with 92% on-time.
What is the cancellation rate for SEA to FLL? ▼
Over the last 24 months, 1.8% of flights on this route were cancelled (32 of 1,771 flights) and 0.5% were diverted.
How far is the flight from SEA to FLL? ▼
The flight distance from Seattle (SEA) to Fort Lauderdale (FLL) is approximately 2,717 miles. This route is served by 6 carriers.
When is the best time to fly from SEA to FLL? ▼
The best recent month for on-time performance was Oct 2024 (92% on-time). The worst was Dec 2025 (65% on-time). Consider booking during months with historically better performance.

Airports on this route

SEA Airport

Seattle
FLL Airport

Fort Lauderdale
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 SEA–FLL data

SEA–FLL is mid-pack at 80.8% on-time; month and carrier mix move more than the corridor headline.

  • Compare SEA and FLL airport profiles: delay causes and top routes differ even on the same corridor. SEA airport
  • If your dates flex, October (89.5% on-time) beats December (73.9%) on this corridor. Seasonal chart
  • 4 other routes post a similar 80.8% 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.