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Flight Reliability

DL 3938 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3938 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

87%
Arrive within 15 minutes
2 min
Average arrival delay
1.5%
Cancelled
12 min early
Median arrival delay

Based on 272 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon87%(38 flights)
  • Tue89%(37 flights)
  • Wed90%(38 flights)
  • Thu93%(40 flights)
  • Fri85%(41 flights)
  • Sat73%(33 flights)
  • Sun90%(41 flights)
On-time by departure window
  • 6–9 AM92%(164 flights)
  • 9 AM–12 PM88%(42 flights)
  • 6–9 PM74%(62 flights)
On-time trend by month
84%
May

Jun 96% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202596%23
August 202581%32
September 202594%36
October 2025100%27
January 202681%26
February 202675%28
March 202679%28
April 202693%30
May 202684%31
Departures on time
87%
Diverted
0%
Flights flown
268
Months covered
11

Keep nerding

Based on 272 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.