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Flight Reliability

DL 4949 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4949 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

82%
Arrive within 15 minutes
3 min
Average arrival delay
1.5%
Cancelled
10 min early
Median arrival delay

Based on 263 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon85%(39 flights)
  • Tue76%(38 flights)
  • Wed94%(33 flights)
  • Thu88%(34 flights)
  • Fri82%(38 flights)
  • Sat86%(36 flights)
  • Sun68%(41 flights)
On-time by departure window
  • 6–9 AM91%(143 flights)
  • 9 AM–12 PM78%(27 flights)
  • 12–3 PM66%(65 flights)
  • 3–6 PM79%(24 flights)
On-time trend by month
83%
Apr

Jun 82% → Apr 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202582%28
July 2025100%31
August 202597%31
September 202593%29
December 202581%16
January 202670%10
February 202677%17
March 202663%49
April 202683%36
Departures on time
85%
Diverted
0%
Flights flown
259
Months covered
11

Keep nerding

Based on 263 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.