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Flight Reliability

DL 305 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 305 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

76%
Arrive within 15 minutes
7 min
Average arrival delay
3.7%
Cancelled
9 min early
Median arrival delay

Based on 712 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(93 flights)
  • Tue76%(99 flights)
  • Wed77%(100 flights)
  • Thu81%(98 flights)
  • Fri84%(99 flights)
  • Sat82%(100 flights)
  • Sun60%(89 flights)
On-time by departure window
  • 9 AM–12 PM80%(347 flights)
  • 3–6 PM71%(331 flights)
On-time trend by month
91%
May

Jun 72% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202572%58
July 202569%58
August 202573%62
September 202579%58
October 202578%60
November 202578%55
December 202573%48
January 202681%53
February 202667%52
March 202659%56
April 202688%60
May 202691%58
Departures on time
74%
Diverted
1.1%
Flights flown
678
Months covered
12

Keep nerding

Based on 712 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.