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Flight Reliability

DL 315 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 315 moved between routes during this period. Numbers below combine all of them, so treat them as background, not a verdict. For a cleaner answer, check the route you are actually flying.

Combined across all its routes

68%
Arrive within 15 minutes
13 min
Average arrival delay
2.7%
Cancelled
1 min early
Median arrival delay

Based on 295 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon77%(43 flights)
  • Tue59%(41 flights)
  • Wed67%(42 flights)
  • Thu68%(44 flights)
  • Fri65%(43 flights)
  • Sat74%(31 flights)
  • Sun64%(42 flights)
On-time by departure window
  • 3–6 PM65%(23 flights)
  • 6–9 PM65%(198 flights)
  • 9 PM–12 AM75%(65 flights)
On-time trend by month
70%
Apr

Jun 43% → Apr 70% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202543%28
July 202558%31
August 202571%31
September 202583%30
October 202560%30
November 202587%30
December 202586%21
January 202664%28
February 202659%22
March 202664%25
April 202670%10
Departures on time
71%
Diverted
0.3%
Flights flown
286
Months covered
11

Keep nerding

Based on 295 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.