Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 381 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 381 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

66%
Arrive within 15 minutes
20 min
Average arrival delay
1.7%
Cancelled
2 min
Median arrival delay

Based on 723 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(100 flights)
  • Tue65%(101 flights)
  • Wed64%(101 flights)
  • Thu67%(103 flights)
  • Fri74%(103 flights)
  • Sat72%(98 flights)
  • Sun51%(103 flights)
On-time by departure window
  • 6–9 AM74%(54 flights)
  • 9 AM–12 PM69%(352 flights)
  • 12–3 PM62%(302 flights)
  • 6–9 PM—(1 flights)
On-time trend by month
82%
May

Jun 57% → May 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%53
July 202557%62
August 202562%60
September 202568%60
October 202564%58
November 202567%60
December 202568%62
January 202660%58
February 202664%56
March 202687%60
April 202660%60
May 202682%60
Departures on time
72%
Diverted
0.3%
Flights flown
709
Months covered
12

Keep nerding

Based on 723 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.