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Flight Reliability

AA 3440 · American Airlines

Dallas–Fort Worth → COU (DFW–COU)83% of its flights flew this route. The rest (ORD–MDT, PHX–SEA) are included in these numbers.

69
Usually Fine
WanderNerd Reliability Score
77%
Arrive within 15 minutes
5 min
Average arrival delay
3.5%
Cancelled
6 min early
Median arrival delay

Based on 315 historical flights. Data through May 2026.

What the data says

The 6–9 AM departure wins.

AA 3440 departing between 6–9 AM arrived on time 89% of the time, versus 55% between 9 AM–12 PM.

Friday is doing you no favors.

AA 3440 arrived on time 86% of the time on Sundays and just 68% on Fridays. That gap is worth planning around.

A bit behind the DFW–COU route.

AA 3440 arrived on time 77% of the time, versus 82% across the DFW–COU route.

Keep a backup plan handy.

AA 3440 was cancelled 3.5% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon78%(45 flights)
  • Tue79%(42 flights)
  • Wed70%(43 flights)
  • Thu78%(45 flights)
  • Fri68%(40 flights)
  • Sat82%(44 flights)
  • Sun86%(43 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM89%(28 flights)
  • 9 AM–12 PM55%(11 flights)
  • 12–3 PM—(1 flights)
  • 3–6 PM67%(12 flights)
  • 6–9 PM78%(112 flights)
  • 9 PM–12 AM77%(137 flights)
On-time trend by month
60%
May

Aug 88% → May 60% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 202588%25
September 202576%29
October 202572%29
November 202578%27
December 202579%28
January 202679%29
February 202693%28
March 202686%29
April 202669%29
May 202660%40
Departures on time
81%
Diverted
0.6%
Flights flown
302
Months covered
12

Same route, other flights

Keep nerding

Based on 315 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.