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Flight Reliability

DL 1527 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1527 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

78%
Arrive within 15 minutes
6 min
Average arrival delay
1.8%
Cancelled
4 min early
Median arrival delay

Based on 730 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(103 flights)
  • Tue83%(101 flights)
  • Wed82%(102 flights)
  • Thu75%(104 flights)
  • Fri71%(104 flights)
  • Sat79%(98 flights)
  • Sun79%(104 flights)
On-time by departure window
  • 6–9 AM—(4 flights)
  • 9 AM–12 PM80%(355 flights)
  • 12–3 PM75%(357 flights)
On-time trend by month
93%
May

Jun 66% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202566%58
July 202576%62
August 202569%61
September 202592%60
October 202584%62
November 202590%60
December 202578%60
January 202666%58
February 202682%56
March 202666%59
April 202668%60
May 202693%60
Departures on time
80%
Diverted
0.1%
Flights flown
716
Months covered
12

Keep nerding

Based on 730 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.