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Flight Reliability

DL 901 · Delta Air Lines

Phoenix → Atlanta (PHX–ATL)

94
Nerd Approved
WanderNerd Reliability Score
91%
Arrive within 15 minutes
2 min early
Average arrival delay
1.4%
Cancelled
11 min early
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

Thursdays have been rough.

DL 901 arrived on time 100% of the time on Mondays and just 84% on Thursdays. That gap is worth planning around.

Better than the PHX–ATL route average.

DL 901 arrived on time 91% of the time, versus 83% across the PHX–ATL route.

Better than the Delta Air Lines network average.

DL 901 arrived on time 91% of the time, versus 81% across the Delta Air Lines network.

Slipping a little lately.

DL 901 arrived on time 89% of the time over the last three months in the data, compared with 95% in the three months before that.

The breakdown

On-time by weekday
  • Mon100%(49 flights)
  • Tue94%(51 flights)
  • Wed94%(52 flights)
  • Thu84%(51 flights)
  • Fri90%(52 flights)
  • Sat85%(52 flights)
  • Sun92%(52 flights)
On-time trend by month
93%
May

Jun 76% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%29
July 202597%31
August 202597%31
September 202590%30
October 202594%31
November 202593%29
December 202590%30
January 202694%31
February 2026100%28
March 202676%29
April 202697%30
May 202693%30
Departures on time
92%
Diverted
0%
Flights flown
359
Months covered
12

Same route, other flights

Keep nerding

Based on 364 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.