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Route · IAD → EYW · 2020–2025 BTS data

Washington to Key West

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), IAD to EYW (Washington to Key West) ranks #4878 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

75.3%
On-time
-3.7 pts
vs US avg
63 min
Delay when late
527
Flights
#4878 of 4927
Corpus placement

Cancelled

2.1%

Best Month

N/A

Worst Month

N/A

Distance

1,023 mi

Carriers

4

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Mar 2024 30 5 0 0 UA
Jan 2024 31 8 0 1 UA
May 2022 31 12 1 0 YX
Apr 2022 30 9 1 0 YX
Mar 2022 31 15 1 0 YX
Jan 2022 33 12 2 2 YV,YX
Dec 2021 47 10 0 0 YV,YX
Nov 2021 30 6 0 0 YX
Oct 2021 31 3 0 0 YX
Sep 2021 30 3 1 0 YV,YX
Aug 2021 31 8 1 0 YV
Jul 2021 31 12 2 0 YV
Jun 2021 30 7 0 1 YV
May 2021 41 4 0 0 YV,YX
Apr 2021 35 10 2 0 YV,YX
Mar 2021 35 6 0 0 YV,YX

IAD–EYW seasonal on-time pattern

Best: October (90.3%) · weakest: July (61.3%)

50%60%70%80%90%100% JanMarAprMayJunJulAugSepOctNovDec 78.7%

Strongest calendar month

October

90.3% on-time · ~31 flights/mo

Busiest calendar month

December

~47 flights/mo avg

Weakest calendar month

July

61.3% on-time · ~31 flights/mo

Cancellation Rate

2.1%

11 of 527 flights

Diversion Rate

0.8%

4 of 527 flights

Explore origin & destination

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

IAD - Washington

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

IAD on-time profile

EYW - Key West

Full on-time, delay-cause, and seasonal performance for Key West, FL.

EYW on-time profile

Compare the two airports

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

Compare IAD vs EYW

Origin-hub reliability standing

Mid-pack among IAD departures

From IAD, this corridor sits with 42 other 75–85% on-time routes out of 58 tracked departures, not the hub's reliability leaders (14 at ≥85%) and not the softest ( 2 below 75%). Destination: Key West · fleet on-time rank #4425 of 4927.

What the Data Says About IAD to EYW

The Washington to Key West corridor (IAD to EYW) posts a 75.3% on-time rate on the lower edge of the average band, based on 527 tracked flights. Late flights run 63.2 minutes behind on average. 4 carriers cover the 1,023-mile route; over the last 24 months, 11 of 527 flights were cancelled (2.1%) and 0.8% diverted.

Monthly performance data for this route did not show a clear best/worst split in the sample window; review the monthly table above for period-by-period detail.

On the multi-year calendar, IAD–EYW peaks in October at 90.3% on-time while December carries the heaviest traffic (~47 flights per month) ; the softest month is July at 61.3%, a 29.0-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does IAD to EYW rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, IAD to EYW ranks #4878 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 IAD to EYW? ▼
Flights from Washington to Key West have a 75.3% on-time rate based on 527 flights. The average delay is 63.2 minutes.
What is the cancellation rate for IAD to EYW? ▼
Over the last 24 months, 2.1% of flights on this route were cancelled (11 of 527 flights) and 0.8% were diverted.
How far is the flight from IAD to EYW? ▼
The flight distance from Washington (IAD) to Key West (EYW) is approximately 1,023 miles. This route is served by 4 carriers.

Airports on this route

IAD Airport

Washington
EYW Airport

Key West
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 IAD–EYW data

IAD–EYW is mid-pack at 75.3% on-time; month and carrier mix move more than the corridor headline.

  • Compare IAD and EYW airport profiles: delay causes and top routes differ even on the same corridor. IAD airport
  • If your dates flex, October (90.3% on-time) beats July (61.3%) on this corridor. Seasonal chart
  • 4 other routes post a similar 75.3% 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.