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Flight Reliability

DL 850 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 850 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

62%
Arrive within 15 minutes
23 min
Average arrival delay
2.1%
Cancelled
4 min
Median arrival delay

Based on 707 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon61%(100 flights)
  • Tue61%(101 flights)
  • Wed52%(97 flights)
  • Thu57%(98 flights)
  • Fri66%(99 flights)
  • Sat74%(97 flights)
  • Sun62%(96 flights)
On-time by departure window
  • 3–6 PM56%(342 flights)
  • 6–9 PM67%(346 flights)
On-time trend by month
67%
May

Jun 42% → May 67% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202542%55
July 202542%57
August 202578%60
September 202572%60
October 202573%62
November 202552%58
December 202582%45
January 202655%53
February 202661%56
March 202658%62
April 202662%60
May 202667%60
Departures on time
60%
Diverted
0.6%
Flights flown
688
Months covered
12

Keep nerding

Based on 707 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.