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Flight Reliability

DL 1181 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1181 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

70%
Arrive within 15 minutes
14 min
Average arrival delay
2.6%
Cancelled
1 min early
Median arrival delay

Based on 492 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon70%(67 flights)
  • Tue70%(70 flights)
  • Wed73%(69 flights)
  • Thu71%(70 flights)
  • Fri75%(69 flights)
  • Sat78%(63 flights)
  • Sun52%(68 flights)
On-time by departure window
  • 9 AM–12 PM73%(139 flights)
  • 12–3 PM53%(17 flights)
  • 3–6 PM68%(124 flights)
  • 6–9 PM65%(31 flights)
  • 9 PM–12 AM71%(165 flights)
On-time trend by month
68%
May

Jun 54% → May 68% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202554%24
July 202535%23
August 202576%29
September 202590%30
October 202580%30
November 202582%28
December 202561%28
January 202673%55
February 202683%52
March 202662%58
April 202665%60
May 202668%59
Departures on time
71%
Diverted
0.6%
Flights flown
476
Months covered
12

Keep nerding

Based on 492 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.