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Flight Reliability

AA 2840 · American Airlines

Chicago → Philadelphia (ORD–PHL)97% of its flights flew this route. The rest (PHL–ORD) are included in these numbers.

46
Bring Snacks
WanderNerd Reliability Score
67%
Arrive within 15 minutes
41 min
Average arrival delay
3.4%
Cancelled
1 min
Median arrival delay

Based on 356 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

AA 2840 departing between 9 PM–12 AM arrived on time 91% of the time, versus 67% between 12–3 PM.

Wednesdays have been rough.

AA 2840 arrived on time 74% of the time on Saturdays and just 57% on Wednesdays. That gap is worth planning around.

A bit behind the ORD–PHL route.

AA 2840 arrived on time 67% of the time, versus 72% across the ORD–PHL route.

Lagging the American Airlines network.

AA 2840 arrived on time 67% of the time, versus 77% across the American Airlines network.

The breakdown

On-time by weekday
  • Mon68%(50 flights)
  • Tue68%(50 flights)
  • Wed57%(51 flights)
  • Thu68%(50 flights)
  • Fri71%(51 flights)
  • Sat74%(43 flights)
  • Sun67%(49 flights)
On-time by departure window
  • 12–3 PM67%(331 flights)
  • 3–6 PM—(2 flights)
  • 9 PM–12 AM91%(11 flights)
On-time trend by month
81%
May

Jun 36% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202536%25
July 202552%27
August 202555%29
September 202567%30
October 202577%31
November 202571%28
December 202573%30
January 202676%29
February 202681%26
March 202666%29
April 202669%29
May 202681%31
Departures on time
68%
Diverted
0%
Flights flown
344
Months covered
12

Same route, other flights

Keep nerding

Based on 356 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.