OnTimeStats

Historical on-time performance

Boston to Charleston

818 miData through Dec 2025Source: US DOT · BTS

Flights on BOS–CHS arrive on time 73% of the time over the last 12 months.

On-time rate73%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled1.4%of scheduled flights

based on 1,047 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Too close to call — no single carrier is clearly more on-time here.

  • Republic Airways
    On-time71%
    Medianon time
    p9065 min
    Cancel0.0%
    Flights35
  • Delta Air Lines
    On-time77%
    Medianon time
    p9035 min
    Cancel1.0%
    Flights302
  • JetBlue Airways
    On-time72%
    Medianon time
    p9060 min
    Cancel1.7%
    Flights710

Why flights run late

Delay causes

  • Airline35%
  • Weather2%
  • Air traffic (NAS)27%
  • Late aircraft36%
  • 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 BOS → 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 — 80% on time.

  • Mornings80% on time · p90 30 min · 1,114 flights
  • Middays76% on time · p90 45 min · 1,517 flights
  • Afternoons65% on time · p90 75 min · 511 flights
  • Evenings61% on time · p90 90 min · 379 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 69% to 79% on time.

  • Tuesdays79% on time · p90 40 min · 450 flights
  • Wednesdays79% on time · p90 35 min · 460 flights
  • Saturdays77% on time · p90 50 min · 588 flights
  • Mondays73% on time · p90 40 min · 494 flights
  • Sundays71% on time · p90 55 min · 574 flights
  • Thursdays71% on time · p90 60 min · 486 flights
  • Fridays69% on time · p90 75 min · 490 flights
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Keep exploring

Related pages

Delay predictorfor this route→BOS airportBoston→CHS airportCharleston→SkyWest Airlines on this routecarrier detail→SkyWest Airlinesairline profile→

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.