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Flight Reliability

AA 4585 · American Airlines

Boston → Indianapolis (BOS–IND)90% of its flights flew this route. The rest (BOS–LGA) are included in these numbers.

53
A Little Dicey
WanderNerd Reliability Score
69%
Arrive within 15 minutes
20 min
Average arrival delay
4.2%
Cancelled
3 min early
Median arrival delay

Based on 284 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

AA 4585 departing between 12–3 PM arrived on time 96% of the time, versus 66% between 3–6 PM.

Sunday scaries are real for this one.

AA 4585 arrived on time 100% of the time on Saturdays and just 55% on Sundays. That gap is worth planning around.

Lagging the BOS–IND route.

AA 4585 arrived on time 69% of the time, versus 82% across the BOS–IND route.

Lagging the American Airlines network.

AA 4585 arrived on time 69% of the time, versus 77% across the American Airlines network.

The breakdown

On-time by weekday
  • Mon64%(42 flights)
  • Tue64%(44 flights)
  • Wed70%(43 flights)
  • Thu81%(42 flights)
  • Fri73%(45 flights)
  • Sat100%(11 flights)
  • Sun55%(44 flights)
On-time by departure window
  • 12–3 PM96%(26 flights)
  • 3–6 PM66%(174 flights)
  • 6–9 PM66%(71 flights)
On-time trend by month
60%
Mar

Jun 54% → Mar 60% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202554%26
July 202554%24
August 202577%26
September 202592%24
October 202556%25
November 202579%24
December 202559%27
January 202680%25
February 202680%25
March 202660%30
Departures on time
69%
Diverted
0.4%
Flights flown
271
Months covered
12

Same route, other flights

Keep nerding

Based on 284 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.