OnTimeStats

Historical on-time performance

Charleston to Boston

818 miData through Dec 2025Source: US DOT · BTS

Flights on CHS–BOS arrive on time 68% of the time over the last 12 months.

On-time rate68%arrived within 15 min
p90 delay70 min1 in 10 flights is worse (tail risk)
Cancelled1.7%of scheduled flights

based on 1,046 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-time80%
    Medianon time
    p9065 min
    Cancel0.0%
    Flights35
  • JetBlue Airways
    On-time69%
    Medianon time
    p9065 min
    Cancel2.1%
    Flights709
  • Delta Air Lines
    On-time63%
    Medianon time
    p9085 min
    Cancel1.0%
    Flights302

Why flights run late

Delay causes

  • Airline23%
  • Weather1%
  • Air traffic (NAS)38%
  • Late aircraft38%
  • 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 CHS → BOS

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 — 88% on time.

  • Mornings88% on time · p90 20 min · 350 flights
  • Middays70% on time · p90 75 min · 1,139 flights
  • Afternoons68% on time · p90 75 min · 1,324 flights
  • Evenings67% on time · p90 90 min · 416 flights
  • Overnights67% on time · p90 70 min · 313 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 63% to 77% on time.

  • Wednesdays77% on time · p90 55 min · 460 flights
  • Saturdays76% on time · p90 55 min · 583 flights
  • Tuesdays75% on time · p90 65 min · 449 flights
  • Mondays71% on time · p90 75 min · 494 flights
  • Thursdays68% on time · p90 75 min · 486 flights
  • Fridays65% on time · p90 90 min · 490 flights
  • Sundays63% on time · p90 95 min · 580 flights
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Keep exploring

Related pages

Delay predictorfor this route→CHS airportCharleston→BOS airportBoston→Republic Airways on this routecarrier detail→Republic Airwaysairline 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.