Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 3155 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3155 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

92%
Arrive within 15 minutes
1 min early
Average arrival delay
1.9%
Cancelled
12 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon88%(50 flights)
  • Tue96%(51 flights)
  • Wed96%(52 flights)
  • Thu90%(52 flights)
  • Fri94%(50 flights)
  • Sat90%(51 flights)
  • Sun90%(51 flights)
On-time by departure window
  • 6–9 AM93%(348 flights)
  • 9 AM–12 PM—(2 flights)
  • 3–6 PM—(7 flights)
On-time trend by month
93%
May

Jun 90% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%30
July 202583%30
August 2025100%30
September 202597%30
October 202594%31
November 202583%30
December 202593%30
January 202693%28
February 202696%28
March 202687%30
April 202697%30
May 202693%30
Departures on time
93%
Diverted
0.3%
Flights flown
357
Months covered
12

Keep nerding

Based on 365 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.