Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 5099 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 5099 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

76%
Arrive within 15 minutes
12 min
Average arrival delay
5.0%
Cancelled
11 min early
Median arrival delay

Based on 301 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(43 flights)
  • Tue84%(43 flights)
  • Wed74%(43 flights)
  • Thu76%(41 flights)
  • Fri66%(41 flights)
  • Sat77%(34 flights)
  • Sun81%(41 flights)
On-time by departure window
  • 6–9 AM84%(96 flights)
  • 9 AM–12 PM71%(86 flights)
  • 12–3 PM65%(57 flights)
  • 6–9 PM80%(45 flights)
  • 9 PM–12 AM—(2 flights)
On-time trend by month
72%
May

Jun 86% → May 72% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%29
July 202570%30
August 202596%28
December 202542%19
January 202658%33
February 202672%25
March 202685%46
April 202682%38
May 202672%29
Departures on time
77%
Diverted
0%
Flights flown
286
Months covered
10

Keep nerding

Based on 301 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.