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Flight Reliability

DL 438 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 438 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

83%
Arrive within 15 minutes
1 min
Average arrival delay
0.8%
Cancelled
12 min early
Median arrival delay

Based on 514 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(74 flights)
  • Tue88%(73 flights)
  • Wed86%(71 flights)
  • Thu85%(72 flights)
  • Fri92%(73 flights)
  • Sat82%(71 flights)
  • Sun77%(75 flights)
On-time by departure window
  • 6–9 AM83%(198 flights)
  • 9 AM–12 PM88%(161 flights)
  • 12–3 PM74%(54 flights)
  • 3–6 PM80%(96 flights)
On-time trend by month
89%
May

Jun 88% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202588%57
July 202587%62
August 202586%62
September 202597%60
October 202581%36
November 202582%28
December 202545%31
January 202665%17
February 202680%10
March 202688%48
April 202676%42
May 202689%56
Departures on time
84%
Diverted
0.2%
Flights flown
509
Months covered
12

Keep nerding

Based on 514 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.