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Flight Reliability

AA 1237 · American Airlines

Chicago → Tampa (ORD–TPA)

55
A Little Dicey
WanderNerd Reliability Score
69%
Arrive within 15 minutes
19 min
Average arrival delay
3.5%
Cancelled
6 min early
Median arrival delay

Based on 143 historical flights. Data through May 2026.

What the data says

6–9 PM has a slight edge.

Departures between 6–9 PM arrived on time 74% of the time, against 67% between 3–6 PM.

Sunday scaries are real for this one.

AA 1237 arrived on time 86% of the time on Mondays and just 55% on Sundays. That gap is worth planning around.

A bit behind the ORD–TPA route.

AA 1237 arrived on time 69% of the time, versus 74% across the ORD–TPA route.

Lagging the American Airlines network.

AA 1237 arrived on time 69% of the time, versus 77% across the American Airlines network.

The breakdown

On-time by weekday
  • Mon86%(21 flights)
  • Tue77%(17 flights)
  • Wed56%(16 flights)
  • Thu70%(20 flights)
  • Fri64%(22 flights)
  • Sat71%(21 flights)
  • Sun55%(20 flights)
On-time by departure window
  • 3–6 PM67%(103 flights)
  • 6–9 PM74%(34 flights)
On-time trend by month
55%
Mar

Nov 80% → Mar 55% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
November 202580%20
December 202544%25
January 202673%30
February 202689%27
March 202655%29
Departures on time
68%
Diverted
0.7%
Flights flown
137
Months covered
6

Same route, other flights

Keep nerding

Based on 143 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.