OnTimeStats

Historical on-time performance

Nashville to San Francisco

1,969 miData through Dec 2025Source: US DOT · BTS

Flights on BNA–SFO arrive on time 78% of the time over the last 12 months.

On-time rate78%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights

based on 916 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlinesbest
    On-time80%
    Medianon time
    p9035 min
    Cancel0.5%
    Flights794
  • Southwest Airlines
    On-time66%
    Median5 min
    p9040 min
    Cancel0.0%
    Flights122

Why flights run late

Delay causes

  • Airline37%
  • Weather5%
  • Air traffic (NAS)31%
  • Late aircraft27%
  • Security0%

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 BNA → SFO

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

Best time of day

On-time rates are fairly even by time of day on this route — ranging from 65% to 79% on time.

  • Mornings79% on time · p90 30 min · 969 flights
  • Afternoons76% on time · p90 50 min · 227 flights
  • Middays73% on time · p90 40 min · 130 flights · limited
  • Evenings65% on time · p90 65 min · 911 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 66% to 78% on time.

  • Tuesdays78% on time · p90 35 min · 288 flights
  • Saturdays75% on time · p90 50 min · 291 flights
  • Fridays74% on time · p90 45 min · 341 flights
  • Wednesdays74% on time · p90 40 min · 305 flights
  • Thursdays73% on time · p90 45 min · 337 flights
  • Sundays69% on time · p90 50 min · 344 flights
  • Mondays66% on time · p90 60 min · 332 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.