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Flight Reliability

DL 997 · Delta Air Lines

Atlanta → New York (ATL–LGA)96% of its flights flew this route. The rest (MIA–BOS) are included in these numbers.

48
Bring Snacks
WanderNerd Reliability Score
65%
Arrive within 15 minutes
21 min
Average arrival delay
4.4%
Cancelled
1 min
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Mornings have a slight edge.

Departures between 9 AM–12 PM arrived on time 71% of the time, against 65% between 3–6 PM.

Friday is doing you no favors.

DL 997 arrived on time 86% of the time on Saturdays and just 54% on Fridays. That gap is worth planning around.

Lagging the ATL–LGA route.

DL 997 arrived on time 65% of the time, versus 73% across the ATL–LGA route.

Well behind the Delta Air Lines network.

DL 997 arrived on time 65% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon63%(48 flights)
  • Tue59%(51 flights)
  • Wed71%(48 flights)
  • Thu61%(49 flights)
  • Fri54%(52 flights)
  • Sat86%(50 flights)
  • Sun61%(49 flights)
On-time by departure window
  • 9 AM–12 PM71%(14 flights)
  • 3–6 PM65%(333 flights)
On-time trend by month
66%
May

Jun 39% → May 66% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202539%28
July 202543%28
August 202568%31
September 202583%30
October 202567%30
November 202552%29
December 202557%28
January 202680%30
February 202689%26
March 202664%28
April 202670%30
May 202666%29
Departures on time
66%
Diverted
0.5%
Flights flown
347
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.