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Flight Reliability

DL 3156 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3156 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

85%
Arrive within 15 minutes
2 min early
Average arrival delay
0.2%
Cancelled
11 min early
Median arrival delay

Based on 498 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon83%(70 flights)
  • Tue90%(71 flights)
  • Wed97%(71 flights)
  • Thu89%(71 flights)
  • Fri90%(71 flights)
  • Sat83%(69 flights)
  • Sun66%(73 flights)
On-time by departure window
  • 6–9 AM91%(107 flights)
  • 9 AM–12 PM92%(158 flights)
  • 12–3 PM78%(229 flights)
  • 3–6 PM—(2 flights)
On-time trend by month
94%
May

Jun 79% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202579%53
July 202587%62
August 202597%62
September 202592%60
October 202587%62
November 202578%59
December 202564%50
March 202687%23
April 202690%30
May 202694%31
Departures on time
84%
Diverted
0.2%
Flights flown
496
Months covered
11

Keep nerding

Based on 498 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.