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Flight Reliability

AA 1387 · American Airlines

Chicago → Denver (ORD–DEN)90% of its flights flew this route. The rest (BNA–DFW) are included in these numbers.

41
Bring Snacks
WanderNerd Reliability Score
58%
Arrive within 15 minutes
32 min
Average arrival delay
3.6%
Cancelled
7 min
Median arrival delay

Based on 359 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

AA 1387 departing between 6–9 AM arrived on time 85% of the time, versus 55% between 6–9 PM.

Sunday scaries are real for this one.

AA 1387 arrived on time 71% of the time on Tuesdays and just 52% on Sundays. That gap is worth planning around.

Well behind the ORD–DEN route.

AA 1387 arrived on time 58% of the time, versus 75% across the ORD–DEN route.

Well behind the American Airlines network.

AA 1387 arrived on time 58% of the time, versus 77% across the American Airlines network.

The breakdown

On-time by weekday
  • Mon53%(49 flights)
  • Tue71%(51 flights)
  • Wed57%(51 flights)
  • Thu55%(49 flights)
  • Fri59%(49 flights)
  • Sat59%(49 flights)
  • Sun52%(48 flights)
On-time by departure window
  • 6–9 AM85%(33 flights)
  • 12–3 PM—(2 flights)
  • 6–9 PM55%(291 flights)
  • 9 PM–12 AM60%(20 flights)
On-time trend by month
52%
May

Jun 33% → May 52% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202533%30
July 202554%26
August 202543%30
September 202544%27
October 202583%30
November 202565%26
December 202552%31
January 202685%27
February 202661%28
March 202670%30
April 202657%30
May 202652%31
Departures on time
56%
Diverted
0%
Flights flown
346
Months covered
12

Same route, other flights

Keep nerding

Based on 359 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.