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Flight Reliability

DL 317 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 317 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

80%
Arrive within 15 minutes
13 min
Average arrival delay
2.1%
Cancelled
7 min early
Median arrival delay

Based on 385 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon70%(54 flights)
  • Tue85%(54 flights)
  • Wed84%(55 flights)
  • Thu80%(54 flights)
  • Fri82%(54 flights)
  • Sat82%(49 flights)
  • Sun76%(55 flights)
On-time by departure window
  • 6–9 AM77%(209 flights)
  • 9 AM–12 PM93%(55 flights)
  • 12–3 PM85%(34 flights)
  • 3–6 PM87%(60 flights)
  • 6–9 PM41%(17 flights)
On-time trend by month
100%
May

Jun 66% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202566%29
July 202564%28
August 202577%31
September 202569%29
October 202587%31
November 202583%29
December 202557%30
January 202693%30
February 202686%28
March 202685%52
April 202691%46
May 2026100%12
Departures on time
78%
Diverted
0.5%
Flights flown
375
Months covered
12

Keep nerding

Based on 385 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.