OnTimeStats

Historical on-time performance

Washington to Des Moines

897 miData through Dec 2025Source: US DOT · BTS

Flights on DCA–DSM arrive on time 64% of the time over the last 12 months.

On-time rate64%arrived within 15 min
p90 delay80 min1 in 10 flights is worse (tail risk)
Cancelled6.6%of scheduled flights

based on 454 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Republic Airways
    On-time48%
    Median10 min
    p90110 min
    Cancel6.8%
    Flights44
  • PSA Airlinesbest
    On-time66%
    Medianon time
    p9075 min
    Cancel6.6%
    Flights410

Why flights run late

Delay causes

  • Airline31%
  • Weather8%
  • Air traffic (NAS)10%
  • Late aircraft51%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly DCA → DSM

All airlines · rolling 36 months (2023-01 .. 2025-12).

Best time of day

On-time rates are fairly even by time of day on this route — ranging from 63% to 84% on time.

  • Afternoons84% on time · p90 55 min · 95 flights · limited
  • Middays81% on time · p90 25 min · 1,119 flights
  • Overnights69% on time · p90 65 min · 820 flights
  • Evenings63% on time · p90 100 min · 203 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 71% to 78% on time.

  • Tuesdays78% on time · p90 35 min · 331 flights
  • Wednesdays77% on time · p90 30 min · 328 flights
  • Mondays77% on time · p90 50 min · 329 flights
  • Sundays74% on time · p90 55 min · 328 flights
  • Saturdays74% on time · p90 55 min · 288 flights
  • Thursdays72% on time · p90 55 min · 322 flights
  • Fridays71% on time · p90 55 min · 324 flights
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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.