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Flight Reliability

AA 4578 · American Airlines

GSO → New York (GSO–LGA)99% of its flights flew this route. The rest (ORD–IND) are included in these numbers.

66
Usually Fine
WanderNerd Reliability Score
85%
Arrive within 15 minutes
6 min
Average arrival delay
6.8%
Cancelled
9 min early
Median arrival delay

Based on 309 historical flights. Data through May 2026.

What the data says

Thursdays have been rough.

AA 4578 arrived on time 100% of the time on Sundays and just 80% on Thursdays. That gap is worth planning around.

Better than the GSO–LGA route average.

AA 4578 arrived on time 85% of the time, versus 78% across the GSO–LGA route.

Better than the American Airlines network average.

AA 4578 arrived on time 85% of the time, versus 77% across the American Airlines network.

Keep a backup plan handy.

AA 4578 was cancelled 6.8% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon81%(47 flights)
  • Tue94%(47 flights)
  • Wed88%(50 flights)
  • Thu80%(46 flights)
  • Fri83%(48 flights)
  • Sat81%(36 flights)
  • Sun100%(14 flights)
On-time by departure window
  • 12–3 AM—(1 flights)
  • 6–9 AM86%(285 flights)
  • 9 AM–12 PM—(1 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
94%
May

Jun 85% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202585%20
July 202575%20
August 202587%23
September 202595%21
October 202577%26
November 202592%24
December 202580%25
January 202681%26
February 202683%23
March 202690%20
April 202686%29
May 202694%31
Departures on time
91%
Diverted
0%
Flights flown
288
Months covered
12

Same route, other flights

Keep nerding

Based on 309 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.