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Flight Reliability

DL 1377 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1377 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
10 min
Average arrival delay
1.9%
Cancelled
9 min early
Median arrival delay

Based on 362 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(50 flights)
  • Tue72%(50 flights)
  • Wed79%(52 flights)
  • Thu84%(50 flights)
  • Fri84%(50 flights)
  • Sat79%(52 flights)
  • Sun74%(50 flights)
On-time by departure window
  • 9 AM–12 PM86%(187 flights)
  • 12–3 PM77%(56 flights)
  • 3–6 PM66%(95 flights)
  • 6–9 PM63%(16 flights)
On-time trend by month
84%
May

Jun 83% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%30
July 202579%29
August 202565%31
September 202597%30
October 202597%30
November 202596%25
December 202574%31
January 202663%30
February 202673%26
March 202661%31
April 202667%30
May 202684%31
Departures on time
74%
Diverted
0.3%
Flights flown
354
Months covered
12

Keep nerding

Based on 362 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.