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Flight Reliability

DL 1378 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1378 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

78%
Arrive within 15 minutes
7 min
Average arrival delay
1.6%
Cancelled
6 min early
Median arrival delay

Based on 560 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon72%(78 flights)
  • Tue80%(79 flights)
  • Wed79%(81 flights)
  • Thu83%(78 flights)
  • Fri80%(74 flights)
  • Sat79%(77 flights)
  • Sun74%(80 flights)
On-time by departure window
  • 9 AM–12 PM80%(165 flights)
  • 12–3 PM78%(194 flights)
  • 3–6 PM76%(178 flights)
  • 6–9 PM90%(10 flights)
On-time trend by month
77%
May

Jun 82% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202582%60
July 202574%61
August 202575%61
September 202582%60
October 202585%59
November 202583%54
December 202556%45
January 202668%31
February 202686%28
March 202682%27
April 202690%30
May 202677%31
Departures on time
79%
Diverted
0.7%
Flights flown
547
Months covered
12

Keep nerding

Based on 560 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.