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Flight Reliability

DL 4904 · Delta Air Lines

New York → Des Moines (LGA–DSM)96% of its flights flew this route. The rest (RIC–LGA, LGA–RIC) are included in these numbers.

39
Bring Snacks
WanderNerd Reliability Score
65%
Arrive within 15 minutes
17 min
Average arrival delay
6.6%
Cancelled
2 min early
Median arrival delay

Based on 351 historical flights. Data through May 2026.

What the data says

Mornings have a slight edge.

Departures between 9 AM–12 PM arrived on time 68% of the time, against 65% between 3–6 PM.

Sunday scaries are real for this one.

DL 4904 arrived on time 72% of the time on Saturdays. On Sundays: 57%.

A bit behind the LGA–DSM route.

DL 4904 arrived on time 65% of the time, versus 68% across the LGA–DSM route.

Well behind the Delta Air Lines network.

DL 4904 arrived on time 65% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon58%(48 flights)
  • Tue71%(49 flights)
  • Wed69%(51 flights)
  • Thu62%(42 flights)
  • Fri69%(48 flights)
  • Sat72%(39 flights)
  • Sun57%(47 flights)
On-time by departure window
  • 9 AM–12 PM68%(22 flights)
  • 12–3 PM—(9 flights)
  • 3–6 PM65%(293 flights)
On-time trend by month
63%
May

Jun 46% → May 63% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202546%24
July 202556%27
August 202591%32
September 202588%25
October 202573%26
November 202546%24
December 202550%26
January 202672%29
February 202692%24
March 202654%28
April 202652%29
May 202663%30
Departures on time
72%
Diverted
1.1%
Flights flown
324
Months covered
12

Same route, other flights

Keep nerding

Based on 351 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.