Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 4905 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4905 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

67%
Arrive within 15 minutes
19 min
Average arrival delay
4.1%
Cancelled
4 min early
Median arrival delay

Based on 469 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon76%(62 flights)
  • Tue62%(63 flights)
  • Wed66%(64 flights)
  • Thu78%(68 flights)
  • Fri61%(69 flights)
  • Sat64%(56 flights)
  • Sun62%(65 flights)
On-time by departure window
  • 6–9 AM74%(74 flights)
  • 9 AM–12 PM—(1 flights)
  • 12–3 PM69%(194 flights)
  • 3–6 PM60%(162 flights)
  • 6–9 PM81%(16 flights)
On-time trend by month
62%
May

Jun 56% → May 62% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202556%32
July 202567%33
August 202572%18
September 202556%41
October 202589%36
November 202580%30
December 202561%31
January 202671%51
February 202677%47
March 202649%47
April 202667%52
May 202662%29
Departures on time
69%
Diverted
0.6%
Flights flown
447
Months covered
12

Keep nerding

Based on 469 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.