OnTimeStats

Historical on-time performance

Baltimore to Nashville

587 miData through Dec 2025Source: US DOT · BTS

Flights on BWI–BNA arrive on time 80% of the time over the last 12 months.

On-time rate80%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled1.2%of scheduled flights

based on 1,773 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time80%
    Medianon time
    p9035 min
    Cancel1.2%
    Flights1,773

Why flights run late

Delay causes

  • Airline38%
  • Weather4%
  • Air traffic (NAS)20%
  • Late aircraft37%
  • Security1%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly BWI → 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 — 92% on time.

  • Mornings92% on time · p90 10 min · 1,936 flights
  • Middays82% on time · p90 25 min · 976 flights
  • Afternoons72% on time · p90 50 min · 869 flights
  • Evenings68% on time · p90 50 min · 1,109 flights
  • Overnights63% on time · p90 65 min · 921 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 74% to 82% on time.

  • Wednesdays82% on time · p90 25 min · 818 flights
  • Mondays80% on time · p90 35 min · 873 flights
  • Tuesdays80% on time · p90 30 min · 825 flights
  • Thursdays78% on time · p90 35 min · 875 flights
  • Saturdays78% on time · p90 40 min · 666 flights
  • Fridays75% on time · p90 45 min · 881 flights
  • Sundays74% on time · p90 45 min · 873 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.