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Flight Reliability

DL 377 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 377 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

77%
Arrive within 15 minutes
14 min
Average arrival delay
0.5%
Cancelled
4 min early
Median arrival delay

Based on 549 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon72%(78 flights)
  • Tue81%(79 flights)
  • Wed72%(79 flights)
  • Thu80%(78 flights)
  • Fri80%(76 flights)
  • Sat77%(77 flights)
  • Sun74%(78 flights)
On-time by departure window
  • 3–6 PM68%(154 flights)
  • 6–9 PM53%(32 flights)
  • 9 PM–12 AM83%(359 flights)
On-time trend by month
55%
May

Jun 68% → May 55% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202568%37
July 202568%31
August 202584%31
September 202597%30
October 202590%30
November 202585%27
December 202567%60
January 202666%62
February 202688%56
March 202681%59
April 202690%60
May 202655%62
Departures on time
79%
Diverted
0.2%
Flights flown
545
Months covered
12

Keep nerding

Based on 549 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.