OnTimeStats

Airport on-time performance

STL

St. Louis

Data through Dec 2025Source: US DOT · BTS
On-time rate78%flights departing here that arrived on time
Median delayon timetypical departure delay
p90 delay45 min1 in 10 departures is worsetail risk
Cancelled1.4%of scheduled departures
Left the gate on time78%departures that pushed back within 15 min of schedule (DepDel15)

based on 64,202 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

As a connection hub

Arriving here (inbound performance)

These figures reflect inbound flights arriving at this airport — relevant for connections and layovers.

79%arrived on time here
(within 15 min, inbound flights)
  • On time79%
  • 15–59 min late13%
  • 1–2 hr late4%
  • 2 hr+ late3%
  • Cancelled or diverted2%

Arrival outcomes for inbound flights. Last segment = cancelled or diverted.

Bad day: 1 in 10 flights arrives more than 40 min late.

By airline

Carriers departing here (last 12 months)

Delay = arrival delay (ArrDel15-based)

  • Delta Air Linesbest
    On-time86%
    Medianon time
    p9020 min
    Cancel1.0%
    Flights5,457
  • American Airlines
    On-time78%
    Medianon time
    p9050 min
    Cancel2.0%
    Flights5,467
  • Southwest Airlines
    On-time78%
    Medianon time
    p9040 min
    Cancel1.1%
    Flights39,731
  • Republic Airways
    On-time76%
    Medianon time
    p9050 min
    Cancel4.2%
    Flights2,659
  • Alaska Airlines
    On-time76%
    Medianon time
    p9035 min
    Cancel0.8%
    Flights774
  • Envoy Air
    On-time74%
    Medianon time
    p9050 min
    Cancel2.1%
    Flights1,422
  • Frontier Airlines
    On-time73%
    Medianon time
    p9060 min
    Cancel1.8%
    Flights392
  • United Airlines
    On-time71%
    Medianon time
    p9065 min
    Cancel0.9%
    Flights2,376
  • PSA Airlines
    On-time70%
    Medianon time
    p9060 min
    Cancel7.6%
    Flights554
  • SkyWest Airlines
    On-time68%
    Medianon time
    p9080 min
    Cancel1.9%
    Flights1,011

Over time

Departure on-time trend

By season

On-time rate by month

Where flights go

Busiest routes

STL → ATL→STL → ORD→STL → DFW→STL → MDW→STL → PHX→STL → DEN→STL → DTW→STL → LGA→STL → MSP→STL → MCO→
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Will you make a connection at STL? →

Methodology

A flight is on time when it arrives within 15 minutes of schedule — the US DOT / BTS standard. Median and p90(the “1-in-10 bad day”) are read from the full arrival-delay distribution, never averaged across periods.

Figures cover a carrier’s own BTS-coded flights. Cells below ~200 flights are flagged as limited data. All numbers are pre-computed from public BTS On-Time Performance data.