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Flight Reliability

DL 737 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 737 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

81%
Arrive within 15 minutes
8 min
Average arrival delay
2.2%
Cancelled
5 min early
Median arrival delay

Based on 682 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon73%(94 flights)
  • Tue83%(96 flights)
  • Wed82%(96 flights)
  • Thu85%(96 flights)
  • Fri85%(95 flights)
  • Sat79%(93 flights)
  • Sun77%(92 flights)
On-time by departure window
  • 9 AM–12 PM82%(355 flights)
  • 12–3 PM79%(307 flights)
On-time trend by month
89%
May

Jun 77% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%53
July 202574%58
August 202582%60
September 202585%60
October 202587%62
November 202578%58
December 202566%50
January 202681%52
February 202686%56
March 202677%56
April 202688%60
May 202689%37
Departures on time
79%
Diverted
0.7%
Flights flown
662
Months covered
12

Keep nerding

Based on 682 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.