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Flight Reliability

DL 3687 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3687 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
0.3%
Cancelled
9 min early
Median arrival delay

Based on 667 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon72%(95 flights)
  • Tue79%(96 flights)
  • Wed85%(96 flights)
  • Thu85%(95 flights)
  • Fri66%(95 flights)
  • Sat85%(92 flights)
  • Sun85%(96 flights)
On-time by departure window
  • 6–9 AM90%(20 flights)
  • 9 AM–12 PM81%(518 flights)
  • 12–3 PM67%(106 flights)
  • 6–9 PM95%(21 flights)
On-time trend by month
86%
May

Jun 77% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%60
July 202591%58
August 202588%60
September 202588%60
October 202595%62
November 202597%38
December 202553%49
January 202662%58
February 202664%56
March 202665%62
April 202692%60
May 202686%42
Departures on time
80%
Diverted
0%
Flights flown
665
Months covered
12

Keep nerding

Based on 667 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.