OnTimeStats

Historical on-time performance

Baltimore to Charleston

472 miData through Dec 2025Source: US DOT · BTS

Flights on BWI–CHS arrive on time 76% of the time over the last 12 months.

On-time rate76%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.4%of scheduled flights

based on 1,240 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time76%
    Medianon time
    p9040 min
    Cancel1.4%
    Flights1,240

Why flights run late

Delay causes

  • Airline25%
  • Weather6%
  • Air traffic (NAS)21%
  • Late aircraft48%
  • 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 BWI → CHS

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

Best time of day

Mornings are the most reliable time of day to fly this route — 86% on time.

  • Mornings86% on time · p90 15 min · 1,115 flights
  • Middays80% on time · p90 25 min · 586 flights
  • Afternoons76% on time · p90 40 min · 607 flights
  • Evenings66% on time · p90 50 min · 842 flights
  • Overnights59% on time · p90 70 min · 487 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 71% to 79% on time.

  • Tuesdays79% on time · p90 30 min · 497 flights
  • Wednesdays77% on time · p90 30 min · 497 flights
  • Mondays77% on time · p90 40 min · 558 flights
  • Thursdays76% on time · p90 30 min · 537 flights
  • Fridays74% on time · p90 40 min · 557 flights
  • Saturdays72% on time · p90 40 min · 429 flights
  • Sundays71% on time · p90 45 min · 562 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.