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Flight Reliability

DL 1337 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1337 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

89%
Arrive within 15 minutes
2 min early
Average arrival delay
3.7%
Cancelled
11 min early
Median arrival delay

Based on 730 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(98 flights)
  • Tue90%(97 flights)
  • Wed87%(100 flights)
  • Thu89%(103 flights)
  • Fri92%(103 flights)
  • Sat94%(99 flights)
  • Sun90%(103 flights)
On-time by departure window
  • 6–9 AM91%(496 flights)
  • 9 AM–12 PM84%(203 flights)
  • 12–3 PM—(4 flights)
On-time trend by month
95%
May

Jun 92% → May 95% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202592%59
July 202584%57
August 202588%59
September 202597%60
October 202592%62
November 202598%54
December 202588%60
January 202685%58
February 202673%55
March 202681%59
April 202690%60
May 202695%60
Departures on time
89%
Diverted
0%
Flights flown
703
Months covered
12

Keep nerding

Based on 730 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.