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Flight Reliability

DL 1491 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1491 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

73%
Arrive within 15 minutes
7 min
Average arrival delay
1.5%
Cancelled
5 min early
Median arrival delay

Based on 665 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon76%(102 flights)
  • Tue74%(92 flights)
  • Wed70%(90 flights)
  • Thu66%(98 flights)
  • Fri72%(101 flights)
  • Sat85%(74 flights)
  • Sun68%(97 flights)
On-time by departure window
  • 3–6 PM73%(350 flights)
  • 6–9 PM73%(304 flights)
On-time trend by month
52%
May

Jun 46% → May 52% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202546%55
July 202550%62
August 202571%62
September 202588%60
October 202582%62
November 202582%56
December 202577%57
January 202690%50
February 202693%40
March 202670%47
April 202676%53
May 202652%50
Departures on time
68%
Diverted
0.2%
Flights flown
654
Months covered
12

Keep nerding

Based on 665 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.