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Flight Reliability

DL 1577 · Delta Air Lines

Atlanta → Memphis (ATL–MEM)99% of its flights flew this route. The rest (DTW–BUF) are included in these numbers.

76
Usually Fine
WanderNerd Reliability Score
77%
Arrive within 15 minutes
10 min
Average arrival delay
2.2%
Cancelled
4 min early
Median arrival delay

Based on 227 historical flights. Data through May 2026.

What the data says

6–9 PM has a slight edge.

Departures between 6–9 PM arrived on time 79% of the time, against 76% between 9 PM–12 AM.

Sunday scaries are real for this one.

DL 1577 arrived on time 93% of the time on Tuesdays and just 71% on Sundays. That gap is worth planning around.

A bit behind the ATL–MEM route.

DL 1577 arrived on time 77% of the time, versus 82% across the ATL–MEM route.

A bit behind the Delta Air Lines network.

DL 1577 arrived on time 77% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon75%(47 flights)
  • Tue93%(14 flights)
  • Wed85%(13 flights)
  • Thu76%(42 flights)
  • Fri79%(43 flights)
  • Sat79%(14 flights)
  • Sun71%(49 flights)
On-time by departure window
  • 3–6 PM—(4 flights)
  • 6–9 PM79%(58 flights)
  • 9 PM–12 AM76%(160 flights)
On-time trend by month
78%
May

Jun 53% → May 78% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202553%17
July 202550%14
August 202587%15
September 202592%13
October 202588%16
November 202586%22
December 202568%25
January 202673%22
February 202687%23
March 202671%21
April 202694%16
May 202678%18
Departures on time
78%
Diverted
0%
Flights flown
222
Months covered
12

Same route, other flights

Keep nerding

Based on 227 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.