Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 1478 · Delta Air Lines

Atlanta → Detroit (ATL–DTW)

80
Pretty Reliable
WanderNerd Reliability Score
75%
Arrive within 15 minutes
10 min
Average arrival delay
0.3%
Cancelled
4 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 1478 arrived on time 85% of the time on Wednesdays and just 67% on Fridays. That gap is worth planning around.

A bit behind the Delta Air Lines network.

DL 1478 arrived on time 75% of the time, versus 81% across the Delta Air Lines network.

It basically never cancels.

Out of 365 scheduled flights, only 0.3% were cancelled.

The breakdown

On-time by weekday
  • Mon67%(52 flights)
  • Tue75%(51 flights)
  • Wed85%(52 flights)
  • Thu79%(52 flights)
  • Fri67%(51 flights)
  • Sat73%(52 flights)
  • Sun79%(53 flights)
On-time by departure window
  • 3–6 PM—(1 flights)
  • 6–9 PM75%(362 flights)
On-time trend by month
57%
May

Jun 66% → May 57% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202566%29
July 202558%31
August 202581%31
September 2025100%30
October 202587%31
November 202573%30
December 202561%31
January 202677%31
February 202679%28
March 202681%31
April 202680%30
May 202657%30
Departures on time
73%
Diverted
0.3%
Flights flown
363
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.