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Flight Reliability

DL 4015 · Delta Air Lines

Indianapolis → Austin (IND–AUS)

95
Nerd Approved
WanderNerd Reliability Score
91%
Arrive within 15 minutes
3 min early
Average arrival delay
0.3%
Cancelled
9 min early
Median arrival delay

Based on 362 historical flights. Data through May 2026.

What the data says

Skip Monday if you can.

DL 4015 arrived on time 94% of the time on Wednesdays. On Mondays: 83%.

A bit ahead of the IND–AUS route.

DL 4015 arrived on time 91% of the time, versus 84% across the IND–AUS route.

Better than the Delta Air Lines network average.

DL 4015 arrived on time 91% of the time, versus 81% across the Delta Air Lines network.

It basically never cancels.

Out of 362 scheduled flights, only 0.3% were cancelled.

The breakdown

On-time by weekday
  • Mon83%(52 flights)
  • Tue94%(51 flights)
  • Wed94%(52 flights)
  • Thu92%(52 flights)
  • Fri89%(52 flights)
  • Sat90%(52 flights)
  • Sun94%(48 flights)
On-time trend by month
87%
May

Jun 97% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%30
July 202593%30
August 202594%31
September 2025100%30
October 2025100%30
November 2025100%30
December 202565%31
January 202681%31
February 2026100%28
March 202687%30
April 202689%28
May 202687%30
Departures on time
92%
Diverted
0.6%
Flights flown
359
Months covered
12

Same route, other flights

Keep nerding

Based on 362 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.