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Flight Reliability

DL 3877 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3877 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

72%
Arrive within 15 minutes
26 min
Average arrival delay
0.3%
Cancelled
3 min early
Median arrival delay

Based on 298 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon67%(42 flights)
  • Tue76%(42 flights)
  • Wed69%(42 flights)
  • Thu79%(43 flights)
  • Fri71%(41 flights)
  • Sat72%(43 flights)
  • Sun71%(44 flights)
On-time by departure window
  • 9 AM–12 PM69%(65 flights)
  • 12–3 PM65%(52 flights)
  • 3–6 PM75%(60 flights)
  • 6–9 PM78%(59 flights)
  • 9 PM–12 AM72%(61 flights)
On-time trend by month
78%
May

Jun 79% → May 78% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202579%24
July 202564%28
August 202591%22
December 202557%23
January 202650%34
February 202676%37
March 202669%54
April 202692%24
May 202678%50
Departures on time
74%
Diverted
0%
Flights flown
297
Months covered
10

Keep nerding

Based on 298 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.