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Flight Reliability

DL 431 · Delta Air Lines

Denver → Atlanta (DEN–ATL)

92
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 365 historical flights. Data through May 2026.

What the data says

Friday is doing you no favors.

DL 431 arrived on time 94% of the time on Tuesdays. On Fridays: 87%.

Better than the DEN–ATL route average.

DL 431 arrived on time 91% of the time, versus 80% across the DEN–ATL route.

Better than the Delta Air Lines network average.

DL 431 arrived on time 91% of the time, versus 81% across the Delta Air Lines network.

Ticking up lately.

DL 431 arrived on time 93% of the time over the last three months in the data, compared with 90% in the three months before that.

The breakdown

On-time by weekday
  • Mon89%(52 flights)
  • Tue94%(51 flights)
  • Wed92%(51 flights)
  • Thu89%(52 flights)
  • Fri87%(52 flights)
  • Sat94%(49 flights)
  • Sun90%(52 flights)
On-time trend by month
90%
May

Jun 83% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%30
July 202577%31
August 202584%31
September 202597%30
October 2025100%31
November 202597%29
December 202583%30
January 202690%31
February 202696%27
March 202693%29
April 202697%30
May 202690%30
Departures on time
92%
Diverted
0.3%
Flights flown
359
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.