Flightline logoFLIGHTLINE INTEL
Airport Operational Performance · DEC

Decatur On-Time Performance

Historical arrival and departure reliability for Decatur, IL (DEC), covering 43 reported months.

Latest data: May 2026Source: DOT Air Travel Consumer ReportFlightline Intel Beta
Latest arrival OTP
62.3%
-33.9 points year over year
Latest departure OTP
77.4%
-15.1 points year over year
National arrival rank
#335
of 347 airports · -15.3 pts vs. national avg
12-month average
67.0%
Arrival OTP · departures 76.5%

Historical On-Time Performance

Monthly arrival and departure performance, with trailing 12-month averages.

Seasonal Arrival Pattern

Average arrival OTP by calendar month across the loaded history.

Historical Records

MeasureResult
Best monthMay 2025 · 96.2%
Weakest monthApr 2026 · 48.1%
Longest improvement streak4 month-to-month gains
Longest decline streak3 month-to-month declines
Latest reported operations106

Latest 12 Months

Newest month appears first.

MonthArr.Dep.ArrivalsDepartures
May 202662.3%77.4%5353
Apr 202648.1%78.8%5252
Mar 202652.8%67.9%5353
Feb 202668.8%79.2%4848
Jan 202652.8%67.9%5353
Dec 202556.4%67.3%5555
Nov 202566.0%72.0%5050
Oct 202587.0%81.5%5454
Sep 202586.3%82.4%5151
Aug 202573.6%83.0%5353
Jul 202571.7%75.5%5353
Jun 202578.8%84.6%5252
Flightline Intel readout: Decatur recorded 62.3 percent on-time arrivals and 77.4 percent on-time departures in May 2026. Its trailing 12-month arrival average stands at 67.0 percent. The strongest month in the current record was May 2025 at 96.2 percent, while the weakest was Apr 2026 at 48.1 percent.