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Flight Reliability

DL 5491 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 5491 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
10 min
Average arrival delay
2.5%
Cancelled
10 min early
Median arrival delay

Based on 284 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon83%(48 flights)
  • Tue78%(36 flights)
  • Wed80%(35 flights)
  • Thu93%(40 flights)
  • Fri77%(39 flights)
  • Sat81%(37 flights)
  • Sun71%(42 flights)
On-time by departure window
  • 12–3 PM88%(120 flights)
  • 3–6 PM79%(124 flights)
  • 6–9 PM—(7 flights)
  • 9 PM–12 AM50%(26 flights)
On-time trend by month
75%
Mar

Jun 66% → Mar 75% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202566%32
September 2025100%40
October 202595%62
November 202571%56
December 202567%49
March 202675%12
Departures on time
81%
Diverted
0%
Flights flown
277
Months covered
11

Keep nerding

Based on 284 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.