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Flight Reliability

AA 6339 · American Airlines

MFR → Phoenix (MFR–PHX)82% of its flights flew this route. The rest (MLI–ORD, ORD–MLI) are included in these numbers.

82
Pretty Reliable
WanderNerd Reliability Score
79%
Arrive within 15 minutes
13 min
Average arrival delay
0.9%
Cancelled
3 min early
Median arrival delay

Based on 232 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

AA 6339 departing between 12–3 PM arrived on time 84% of the time, versus 44% between 6–9 PM.

Tuesdays have been rough.

AA 6339 arrived on time 85% of the time on Thursdays and just 69% on Tuesdays. That gap is worth planning around.

Lagging the MFR–PHX route.

AA 6339 arrived on time 79% of the time, versus 88% across the MFR–PHX route.

Recent months have been rougher.

AA 6339 arrived on time 61% of the time over the last three months in the data, compared with 91% in the three months before that.

The breakdown

On-time by weekday
  • Mon84%(32 flights)
  • Tue69%(32 flights)
  • Wed84%(31 flights)
  • Thu85%(34 flights)
  • Fri77%(34 flights)
  • Sat77%(30 flights)
  • Sun78%(37 flights)
On-time by departure window
  • 12–3 PM84%(176 flights)
  • 3–6 PM83%(29 flights)
  • 6–9 PM44%(25 flights)
On-time trend by month
57%
May

Jun 90% → May 57% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%30
July 202584%31
August 2025100%31
September 202589%26
December 202583%12
February 202659%17
March 202668%31
May 202657%37
Departures on time
80%
Diverted
0%
Flights flown
230
Months covered
11

Same route, other flights

Keep nerding

Based on 232 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.