OnTimeStats

Historical on-time performance

Philadelphia to Atlanta

666 miData through May 2026Source: US DOT · BTS

Flights on PHL–ATL arrive on time 76% of the time over the last 12 months.

On-time rate76%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled2.7%of scheduled flights

based on 5,366 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-time92%
    Medianon time
    p90on time
    Cancel5.3%
    Flights38
  • Delta Air Lines
    On-time81%
    Medianon time
    p9030 min
    Cancel2.5%
    Flights3,043
  • PSA Airlines
    On-time79%
    Medianon time
    p9045 min
    Cancel3.8%
    Flights842
  • American Airlines
    On-time64%
    Medianon time
    p9070 min
    Cancel1.9%
    Flights469
  • Frontier Airlines
    On-time62%
    Medianon time
    p9075 min
    Cancel3.0%
    Flights974

Why flights run late

Delay causes

  • Airline27%
  • Weather4%
  • Air traffic (NAS)24%
  • Late aircraft45%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline44%
  • Weather52%
  • Air traffic (NAS)4%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 147 cancellations with a reported cause (BTS reports causes from June 2003).

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly PHL → ATL

All airlines · rolling 36 months (2023-06 .. 2026-05).

Best time of day

Mornings are the most reliable time of day to fly this route — 85% on time.

  • Mornings85% on time · p90 25 min · 5,843 flights
  • Middays81% on time · p90 35 min · 3,998 flights
  • Afternoons75% on time · p90 55 min · 2,907 flights
  • Evenings66% on time · p90 70 min · 3,965 flights
  • Overnights63% on time · p90 95 min · 547 flights

Best day of week

Wednesdays are the most reliable day to fly this route — 84% on time.

  • Wednesdays84% on time · p90 25 min · 2,346 flights
  • Tuesdays81% on time · p90 40 min · 2,324 flights
  • Thursdays79% on time · p90 40 min · 2,606 flights
  • Saturdays77% on time · p90 50 min · 2,124 flights
  • Mondays75% on time · p90 55 min · 2,621 flights
  • Fridays75% on time · p90 45 min · 2,625 flights
  • Sundays72% on time · p90 55 min · 2,614 flights

Keep exploring

Related pages

Delay predictorfor this route→PHL airportPhiladelphia→ATL airportAtlanta→Delta Air Linesairline profile→Frontier Airlinesairline profile→PSA Airlinesairline profile→Seasonal delay patternsguide→

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.