OnTimeStats

Airport on-time performance

IAD

Washington

Data through Dec 2025Source: US DOT · BTS
On-time rate78%flights departing here that arrived on time
Median delayon timetypical departure delay
p90 delay40 min1 in 10 departures is worsetail risk
Cancelled1.0%of scheduled departures
Left the gate on time82%departures that pushed back within 15 min of schedule (DepDel15)

based on 57,183 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.

80%arrived on time here
(within 15 min, inbound flights)
  • On time80%
  • 15–59 min late12%
  • 1–2 hr late4%
  • 2 hr+ late3%
  • Cancelled or diverted1%

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

Bad day: 1 in 10 flights arrives more than 35 min late.

By airline

Carriers departing here (last 12 months)

Delay = arrival delay (ArrDel15-based)

  • SkyWest Airlinesbest
    On-time80%
    Medianon time
    p9050 min
    Cancel0.7%
    Flights2,082
  • Republic Airways
    On-time79%
    Medianon time
    p9040 min
    Cancel2.3%
    Flights7,736
  • United Airlines
    On-time79%
    Medianon time
    p9040 min
    Cancel0.5%
    Flights33,954
  • Delta Air Lines
    On-time78%
    Medianon time
    p9050 min
    Cancel1.5%
    Flights2,777
  • PSA Airlines
    On-time77%
    Medianon time
    p9050 min
    Cancel3.1%
    Flights1,354
  • Southwest Airlines
    On-time74%
    Medianon time
    p9040 min
    Cancel0.7%
    Flights1,205
  • American Airlines
    On-time73%
    Medianon time
    p9045 min
    Cancel2.3%
    Flights1,005
  • Alaska Airlines
    On-time72%
    Medianon time
    p9055 min
    Cancel0.7%
    Flights1,535
  • Frontier Airlines
    On-time62%
    Medianon time
    p90100 min
    Cancel2.9%
    Flights653

Over time

Departure on-time trend

By season

On-time rate by month

Where flights go

Busiest routes

IAD → ATL→IAD → LAX→IAD → DEN→IAD → SFO→IAD → BOS→IAD → ORD→IAD → MCO→IAD → CLT→IAD → DFW→IAD → JFK→
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Will you make a connection at IAD? →

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.