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Flight Reliability

DL 1040 · Delta Air Lines

Austin → Detroit (AUS–DTW)

98
Nerd Approved
WanderNerd Reliability Score
95%
Arrive within 15 minutes
10 min early
Average arrival delay
1.1%
Cancelled
13 min early
Median arrival delay

Based on 363 historical flights. Data through May 2026.

What the data says

Sunday scaries are real for this one.

DL 1040 arrived on time 98% of the time on Tuesdays. On Sundays: 90%.

Better than the AUS–DTW route average.

DL 1040 arrived on time 95% of the time, versus 87% across the AUS–DTW route.

Better than the Delta Air Lines network average.

DL 1040 arrived on time 95% of the time, versus 81% across the Delta Air Lines network.

Ticking up lately.

DL 1040 arrived on time 95% of the time over the last three months in the data, compared with 88% in the three months before that.

The breakdown

On-time by weekday
  • Mon98%(50 flights)
  • Tue98%(52 flights)
  • Wed96%(51 flights)
  • Thu94%(52 flights)
  • Fri92%(51 flights)
  • Sat94%(52 flights)
  • Sun90%(51 flights)
On-time by departure window
  • 3–6 AM95%(355 flights)
  • 9 AM–12 PM—(4 flights)
On-time trend by month
97%
May

Jun 97% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%30
July 202597%31
August 2025100%31
September 2025100%30
October 202597%31
November 202597%30
December 202597%30
January 202683%29
February 202685%26
March 202694%31
April 202693%30
May 202697%30
Departures on time
97%
Diverted
0%
Flights flown
359
Months covered
12

Same route, other flights

Keep nerding

Based on 363 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.