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Flight Reliability

DL 1188 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1188 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

83%
Arrive within 15 minutes
1 min
Average arrival delay
2.9%
Cancelled
8 min early
Median arrival delay

Based on 591 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon82%(83 flights)
  • Tue82%(91 flights)
  • Wed77%(91 flights)
  • Thu85%(87 flights)
  • Fri89%(90 flights)
  • Sat81%(82 flights)
  • Sun88%(48 flights)
On-time by departure window
  • 6–9 AM86%(105 flights)
  • 9 AM–12 PM85%(297 flights)
  • 12–3 PM—(3 flights)
  • 3–6 PM77%(167 flights)
On-time trend by month
100%
May

Jun 86% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%14
July 202570%20
August 202588%42
September 202590%50
October 202585%53
November 202574%49
December 202560%48
January 202680%60
February 202682%56
March 202681%58
April 202690%60
May 2026100%62
Departures on time
89%
Diverted
0.3%
Flights flown
572
Months covered
12

Keep nerding

Based on 591 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.