OnTimeStats

Historical on-time performance

Atlanta to Buffalo

712 miData through Dec 2025Source: US DOT · BTS

Flights on ATL–BUF 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)
Cancelled1.9%of scheduled flights

based on 1,175 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Delta Air Lines
    On-time78%
    Medianon time
    p9035 min
    Cancel1.9%
    Flights1,175

Why flights run late

Delay causes

  • Airline46%
  • Weather12%
  • Air traffic (NAS)17%
  • Late aircraft25%
  • 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 ATL → BUF

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 — 85% on time.

  • Mornings85% on time · p90 20 min · 1,173 flights
  • Middays77% on time · p90 40 min · 576 flights
  • Overnights76% on time · p90 45 min · 1,075 flights
  • Afternoons74% on time · p90 45 min · 1,099 flights
  • Evenings51% on time · p90 95 min · 57 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 72% to 83% on time.

  • Wednesdays83% on time · p90 30 min · 529 flights
  • Tuesdays82% on time · p90 35 min · 548 flights
  • Thursdays79% on time · p90 35 min · 610 flights
  • Mondays78% on time · p90 45 min · 583 flights
  • Saturdays78% on time · p90 30 min · 524 flights
  • Fridays77% on time · p90 45 min · 580 flights
  • Sundays72% on time · p90 50 min · 606 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.