Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 3849 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3849 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

91%
Arrive within 15 minutes
3 min early
Average arrival delay
0.9%
Cancelled
15 min early
Median arrival delay

Based on 425 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon97%(59 flights)
  • Tue92%(59 flights)
  • Wed88%(59 flights)
  • Thu87%(61 flights)
  • Fri90%(61 flights)
  • Sat92%(59 flights)
  • Sun89%(63 flights)
On-time by departure window
  • 6–9 AM94%(47 flights)
  • 9 AM–12 PM80%(61 flights)
  • 12–3 PM72%(36 flights)
  • 3–6 PM—(4 flights)
  • 6–9 PM—(7 flights)
  • 9 PM–12 AM95%(266 flights)
On-time trend by month
91%
May

Jun 97% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%30
July 202594%31
August 202597%31
September 2025100%30
October 202597%31
November 202593%30
December 202597%31
January 202683%29
February 202693%28
March 202663%54
April 2026100%41
May 202691%55
Departures on time
90%
Diverted
0%
Flights flown
421
Months covered
12

Keep nerding

Based on 425 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.