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Flight Reliability

DL 401 · Delta Air Lines

Dallas–Fort Worth → Atlanta (DFW–ATL)

86
Pretty Reliable
WanderNerd Reliability Score
94%
Arrive within 15 minutes
7 min early
Average arrival delay
3.6%
Cancelled
12 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Monday is the weak spot.

DL 401 arrived on time 98% of the time on Thursdays. On Mondays: 86%.

Well ahead of the DFW–ATL route.

DL 401 arrived on time 94% of the time, versus 76% across the DFW–ATL route.

Better than the Delta Air Lines network average.

DL 401 arrived on time 94% of the time, versus 81% across the Delta Air Lines network.

Keep a backup plan handy.

DL 401 was cancelled 3.6% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon86%(49 flights)
  • Tue98%(51 flights)
  • Wed90%(52 flights)
  • Thu98%(52 flights)
  • Fri96%(52 flights)
  • Sat91%(46 flights)
  • Sun96%(49 flights)
On-time trend by month
87%
May

Jun 96% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202596%27
July 2025100%31
August 202594%31
September 202593%30
October 202597%31
November 202583%29
December 202597%30
January 202696%26
February 2026100%27
March 202693%28
April 202690%30
May 202687%31
Departures on time
95%
Diverted
0.3%
Flights flown
351
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.