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Flight Reliability

DL 1155 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1155 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

86%
Arrive within 15 minutes
0 min
Average arrival delay
1.8%
Cancelled
10 min early
Median arrival delay

Based on 658 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon83%(92 flights)
  • Tue91%(95 flights)
  • Wed87%(93 flights)
  • Thu75%(91 flights)
  • Fri88%(94 flights)
  • Sat92%(88 flights)
  • Sun87%(92 flights)
On-time by departure window
  • 9 AM–12 PM87%(453 flights)
  • 3–6 PM84%(192 flights)
On-time trend by month
97%
May

Jun 90% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%60
July 202594%62
August 202576%62
September 202590%59
October 202582%62
November 202579%56
December 202584%57
January 202688%32
February 202674%23
March 202681%52
April 202691%58
May 202697%62
Departures on time
86%
Diverted
0.2%
Flights flown
645
Months covered
12

Keep nerding

Based on 658 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.