OnTimeStats

Historical on-time performance

Boston to Nashville

943 miData through Dec 2025Source: US DOT · BTS

Flights on BOS–BNA arrive on time 71% of the time over the last 12 months.

On-time rate71%arrived within 15 min
p90 delay65 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights

based on 2,625 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.

  • Southwest Airlines
    On-time72%
    Medianon time
    p9055 min
    Cancel0.5%
    Flights961
  • Republic Airways
    On-time69%
    Medianon time
    p9075 min
    Cancel1.8%
    Flights397
  • Delta Air Lines
    On-time69%
    Medianon time
    p9075 min
    Cancel0.4%
    Flights447
  • JetBlue Airways
    On-time73%
    Medianon time
    p9065 min
    Cancel1.4%
    Flights790
  • Spirit Airlines
    On-time83%
    Medianon time
    p9015 min
    Cancel0.0%
    Flights30

Why flights run late

Delay causes

  • Airline31%
  • Weather1%
  • Air traffic (NAS)16%
  • 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 BOS → BNA

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 15 min · 2,810 flights
  • Middays79% on time · p90 35 min · 1,204 flights
  • Afternoons68% on time · p90 75 min · 1,897 flights
  • Evenings63% on time · p90 85 min · 1,683 flights
  • Overnights56% on time · p90 85 min · 431 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 69% to 80% on time.

  • Saturdays80% on time · p90 45 min · 954 flights
  • Wednesdays79% on time · p90 40 min · 1,119 flights
  • Tuesdays77% on time · p90 45 min · 1,113 flights
  • Mondays74% on time · p90 60 min · 1,207 flights
  • Thursdays73% on time · p90 65 min · 1,198 flights
  • Fridays73% on time · p90 60 min · 1,209 flights
  • Sundays69% on time · p90 65 min · 1,225 flights
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Keep exploring

Related pages

Delay predictorfor this route→BOS airportBoston→BNA airportNashville→Southwest Airlines on this routecarrier detail→Southwest 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.