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Flight Reliability

DL 947 · Delta Air Lines

Phoenix → Detroit (PHX–DTW)96% of its flights flew this route. The rest (LAS–ATL) are included in these numbers.

98
Nerd Approved
WanderNerd Reliability Score
91%
Arrive within 15 minutes
2 min early
Average arrival delay
0%
Cancelled
9 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

The 6–9 AM departure wins.

DL 947 departing between 6–9 AM arrived on time 92% of the time, versus 75% between 9 AM–12 PM.

Sunday scaries are real for this one.

DL 947 arrived on time 96% of the time on Thursdays. On Sundays: 85%.

Better than the PHX–DTW route average.

DL 947 arrived on time 91% of the time, versus 82% across the PHX–DTW route.

Better than the Delta Air Lines network average.

DL 947 arrived on time 91% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon92%(52 flights)
  • Tue90%(52 flights)
  • Wed90%(51 flights)
  • Thu96%(52 flights)
  • Fri90%(52 flights)
  • Sat92%(52 flights)
  • Sun85%(53 flights)
On-time by departure window
  • 3–6 AM—(7 flights)
  • 6–9 AM92%(341 flights)
  • 9 AM–12 PM75%(16 flights)
On-time trend by month
90%
May

Jun 97% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%29
July 202594%31
August 202594%31
September 202597%30
October 202597%31
November 202593%30
December 202584%31
January 202684%31
February 202686%28
March 202681%31
April 202697%30
May 202690%31
Departures on time
92%
Diverted
0.3%
Flights flown
364
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.