OnTimeStats

Historical on-time performance

Newark to St. Louis

872 miData through Dec 2025Source: US DOT · BTS

Flights on EWR–STL arrive on time 76% of the time over the last 12 months.

On-time rate76%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled6.6%of scheduled flights

based on 847 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Republic Airways
    On-time76%
    Medianon time
    p9035 min
    Cancel6.6%
    Flights847

Why flights run late

Delay causes

  • Airline22%
  • Weather9%
  • Air traffic (NAS)20%
  • Late aircraft50%
  • 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 EWR → STL

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 62% to 90% on time.

  • Mornings90% on time · p90 10 min · 870 flights
  • Middays85% on time · p90 25 min · 146 flights · limited
  • Evenings76% on time · p90 70 min · 312 flights
  • Afternoons76% on time · p90 65 min · 766 flights
  • Overnights62% on time · p90 85 min · 640 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 71% to 81% on time.

  • Mondays81% on time · p90 35 min · 399 flights
  • Wednesdays80% on time · p90 45 min · 395 flights
  • Tuesdays80% on time · p90 30 min · 401 flights
  • Fridays78% on time · p90 60 min · 396 flights
  • Saturdays77% on time · p90 45 min · 363 flights
  • Sundays77% on time · p90 65 min · 390 flights
  • Thursdays71% on time · p90 60 min · 390 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.