Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 842 · Delta Air Lines

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

70
Usually Fine
WanderNerd Reliability Score
69%
Arrive within 15 minutes
14 min
Average arrival delay
1.4%
Cancelled
2 min
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Friday is doing you no favors.

DL 842 arrived on time 87% of the time on Saturdays and just 61% on Fridays. That gap is worth planning around.

A bit behind the ATL–PHX route.

DL 842 arrived on time 69% of the time, versus 75% across the ATL–PHX route.

Lagging the Delta Air Lines network.

DL 842 arrived on time 69% of the time, versus 81% across the Delta Air Lines network.

Trending in the right direction.

DL 842 arrived on time 78% of the time over the last three months in the data, compared with 70% in the three months before that.

The breakdown

On-time by weekday
  • Mon64%(52 flights)
  • Tue77%(52 flights)
  • Wed71%(52 flights)
  • Thu61%(51 flights)
  • Fri61%(51 flights)
  • Sat87%(52 flights)
  • Sun66%(50 flights)
On-time by departure window
  • 3–6 PM69%(16 flights)
  • 9 PM–12 AM70%(344 flights)
On-time trend by month
68%
May

Jun 35% → May 68% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202535%29
July 202550%30
August 202577%31
September 202573%30
October 202574%31
November 202579%29
December 202570%30
January 202674%31
February 202664%28
March 202680%30
April 202687%30
May 202668%31
Departures on time
71%
Diverted
0%
Flights flown
360
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.