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Flight Reliability

DL 1131 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1131 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
12 min
Average arrival delay
2.8%
Cancelled
3 min early
Median arrival delay

Based on 319 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon77%(52 flights)
  • Tue79%(29 flights)
  • Wed77%(30 flights)
  • Thu69%(54 flights)
  • Fri67%(55 flights)
  • Sat77%(35 flights)
  • Sun69%(55 flights)
On-time by departure window
  • 6–9 AM100%(15 flights)
  • 12–3 PM92%(73 flights)
  • 3–6 PM59%(131 flights)
  • 6–9 PM73%(91 flights)
On-time trend by month
52%
May

Jun 68% → May 52% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202568%22
July 202545%29
August 202555%20
September 202592%12
October 202559%17
December 202596%26
January 202691%33
February 202692%24
March 202675%51
April 202676%42
May 202652%31
Departures on time
72%
Diverted
0%
Flights flown
310
Months covered
12

Keep nerding

Based on 319 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.