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Flight Reliability

DL 499 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 499 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
4 min
Average arrival delay
1.5%
Cancelled
5 min early
Median arrival delay

Based on 714 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon82%(96 flights)
  • Tue75%(99 flights)
  • Wed79%(102 flights)
  • Thu78%(102 flights)
  • Fri81%(102 flights)
  • Sat91%(99 flights)
  • Sun78%(102 flights)
On-time by departure window
  • 6–9 AM85%(359 flights)
  • 9 AM–12 PM76%(343 flights)
On-time trend by month
87%
May

Jun 80% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%60
July 202580%60
August 202593%60
September 202560%60
October 202566%62
November 202590%60
December 202572%50
January 202675%55
February 202691%53
March 202682%62
April 202690%60
May 202687%60
Departures on time
83%
Diverted
0.1%
Flights flown
702
Months covered
12

Keep nerding

Based on 714 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.