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Flight Reliability

DL 304 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 304 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

71%
Arrive within 15 minutes
15 min
Average arrival delay
0.2%
Cancelled
2 min
Median arrival delay

Based on 419 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon73%(64 flights)
  • Tue59%(44 flights)
  • Wed77%(64 flights)
  • Thu73%(60 flights)
  • Fri71%(63 flights)
  • Sat65%(63 flights)
  • Sun71%(59 flights)
On-time by departure window
  • 6–9 AM71%(217 flights)
  • 9 AM–12 PM69%(170 flights)
  • 12–3 PM77%(30 flights)
On-time trend by month
67%
Feb

Jun 88% → Feb 67% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202588%24
July 202566%38
August 202567%54
September 202588%56
October 202569%62
November 202572%58
December 202561%49
January 202659%32
February 202667%30
Departures on time
78%
Diverted
0.2%
Flights flown
417
Months covered
12

Keep nerding

Based on 419 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.