Skip to content
WanderNerd
Check a flight

Flight Reliability

AA 637 · American Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and AA 637 moved between routes during this period. Numbers below combine all of them, so treat them as background, not a verdict. For a cleaner answer, check the route you are actually flying.

Combined across all its routes

70%
Arrive within 15 minutes
17 min
Average arrival delay
1.2%
Cancelled
3 min early
Median arrival delay

Based on 172 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon77%(26 flights)
  • Tue71%(24 flights)
  • Wed67%(24 flights)
  • Thu73%(26 flights)
  • Fri79%(24 flights)
  • Sat58%(19 flights)
  • Sun62%(26 flights)
On-time by departure window
  • 6–9 AM69%(13 flights)
  • 3–6 PM—(1 flights)
  • 6–9 PM67%(85 flights)
  • 9 PM–12 AM73%(70 flights)
On-time trend by month
90%
May

Jun 67% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202567%30
July 202568%28
August 202568%31
September 202569%29
October 202570%27
November 202573%11
May 202690%10
Departures on time
69%
Diverted
0.6%
Flights flown
169
Months covered
9

Keep nerding

Based on 172 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.