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Flight Reliability

DL 3677 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3677 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

85%
Arrive within 15 minutes
8 min
Average arrival delay
1.5%
Cancelled
7 min early
Median arrival delay

Based on 340 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon89%(47 flights)
  • Tue75%(48 flights)
  • Wed87%(45 flights)
  • Thu89%(47 flights)
  • Fri83%(48 flights)
  • Sat90%(51 flights)
  • Sun80%(49 flights)
On-time by departure window
  • 12–3 PM83%(205 flights)
  • 3–6 PM75%(12 flights)
  • 6–9 PM89%(118 flights)
On-time trend by month
81%
May

Jun 77% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%30
July 202581%31
August 202587%31
September 202580%30
October 202587%31
November 202590%30
December 202573%26
January 202693%28
February 2026100%28
March 202683%30
April 202686%14
May 202681%26
Departures on time
85%
Diverted
0%
Flights flown
335
Months covered
12

Keep nerding

Based on 340 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.