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Flight Reliability

AA 4939 · American Airlines

MAF → Phoenix (MAF–PHX)

88
Pretty Reliable
WanderNerd Reliability Score
86%
Arrive within 15 minutes
15 min
Average arrival delay
0.8%
Cancelled
14 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

The 6–9 AM departure wins.

AA 4939 departing between 6–9 AM arrived on time 90% of the time, versus 81% between 9 AM–12 PM.

Tuesdays have been rough.

AA 4939 arrived on time 94% of the time on Wednesdays and just 77% on Tuesdays. That gap is worth planning around.

Better than the American Airlines network average.

AA 4939 arrived on time 86% of the time, versus 77% across the American Airlines network.

The breakdown

On-time by weekday
  • Mon79%(52 flights)
  • Tue77%(52 flights)
  • Wed94%(52 flights)
  • Thu90%(51 flights)
  • Fri90%(52 flights)
  • Sat84%(51 flights)
  • Sun87%(52 flights)
On-time by departure window
  • 6–9 AM90%(201 flights)
  • 9 AM–12 PM81%(161 flights)
On-time trend by month
94%
May

Jun 73% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%30
July 202587%31
August 202581%31
September 202587%30
October 202577%31
November 202587%30
December 202594%31
January 202686%29
February 202693%27
March 202684%31
April 202690%30
May 202694%31
Departures on time
84%
Diverted
0%
Flights flown
362
Months covered
12

Same route, other flights

Keep nerding

Based on 365 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.