Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 5237 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 5237 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

90%
Arrive within 15 minutes
2 min early
Average arrival delay
2.9%
Cancelled
13 min early
Median arrival delay

Based on 310 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon90%(41 flights)
  • Tue98%(42 flights)
  • Wed95%(43 flights)
  • Thu90%(40 flights)
  • Fri84%(43 flights)
  • Sat84%(50 flights)
  • Sun88%(41 flights)
On-time by departure window
  • 6–9 AM94%(249 flights)
  • 9 AM–12 PM—(9 flights)
  • 12–3 PM—(6 flights)
  • 3–6 PM67%(36 flights)
On-time trend by month
87%
May

Jun 86% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%29
July 2025100%29
August 202597%30
September 2025100%29
October 2025100%31
November 202597%29
December 202594%18
January 202678%27
February 202682%17
March 202654%24
April 202693%14
May 202687%23
Departures on time
91%
Diverted
0.3%
Flights flown
300
Months covered
12

Keep nerding

Based on 310 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.