OnTimeStats

Airport on-time performance

St. Thomas

Data through May 2026Source: US DOT · BTS
On-time rate77%flights departing here that arrived on time
p90 delay50 min1 in 10 departures is worse (tail risk)
Cancelled2.0%of scheduled departures
Left the gate on time78%departures that pushed back within 15 min of schedule (DepDel15)

based on 5,655 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.

76%arrived on time here
(within 15 min, inbound flights)
  • On time76%
  • 15–59 min late15%
  • 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)

  • American Airlines
    On-time80%
    Medianon time
    p9040 min
    Cancel1.6%
    Flights1,981
  • United Airlines
    On-time79%
    Medianon time
    p9035 min
    Cancel1.7%
    Flights541
  • Delta Air Lines
    On-time78%
    Medianon time
    p9035 min
    Cancel2.7%
    Flights968
  • Southwest Airlines
    On-time76%
    Medianon time
    p9035 min
    Cancel0.0%
    Flights92
  • Spirit Airlines
    On-time72%
    Medianon time
    p9060 min
    Cancel1.9%
    Flights366
  • JetBlue Airways
    On-time70%
    Medianon time
    p9085 min
    Cancel2.3%
    Flights477

Over time

On-time trend

By season

On-time rate by month

When it gets busy

Busiest times at STT

Historically, departures at STT peak 2–5 p.m. — 54% of scheduled flights leave in that block.

STT is busier on weekends — a typical weekend day sees about 30% more departures than a weekday.

  • 10 a.m.–2 p.m.33%
  • 2–5 p.m.54%
  • 5–8 p.m.13%

Share of 16,130 scheduled departures by planned departure time, 2023-06 .. 2026-05. Historical averages from BTS data — not live airport status.

When flights don't go

Why flights were cancelled

  • Airline23%
  • Weather50%
  • Air traffic (NAS)23%
  • Security4%

Most cancellations here are attributed to Weather. Shares are among 114 cancellations with a reported cause (BTS reports causes from June 2003).

Where flights go

Busiest routes

STT → MIA→STT → ATL→STT → SJU→STT → CLT→STT → JFK→STT → FLL→STT → EWR→STT → PHL→STT → MCO→STT → IAD→

Side by side

Compare this airport

Compare with Hartsfield Jackson Atlanta International Airporthead-to-head on-time→Compare with Chicago O'Hare International Airporthead-to-head on-time→Compare with Dallas Fort Worth International Airporthead-to-head on-time→Compare with Denver International Airporthead-to-head on-time→

Will you make a connection at STT? →

Keep exploring

Related guides

When to arrive at the airportguide→Worst airports for delaysguide→

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.