Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 5248 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 5248 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
7 min
Average arrival delay
0.8%
Cancelled
8 min early
Median arrival delay

Based on 237 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(31 flights)
  • Tue92%(37 flights)
  • Wed70%(37 flights)
  • Thu94%(32 flights)
  • Fri85%(33 flights)
  • Sat74%(34 flights)
  • Sun68%(31 flights)
On-time by departure window
  • 6–9 AM83%(114 flights)
  • 9 AM–12 PM84%(25 flights)
  • 12–3 PM79%(48 flights)
  • 6–9 PM71%(48 flights)
On-time trend by month
96%
Apr

Jun 85% → Apr 96% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202585%27
July 202574%31
August 202584%31
September 202565%20
January 202688%17
February 202682%34
March 202666%38
April 202696%22
Departures on time
82%
Diverted
0%
Flights flown
235
Months covered
12

Keep nerding

Based on 237 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.