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Flight Reliability

DL 4938 · Delta Air Lines

New York → Birmingham (LGA–BHM)88% of its flights flew this route. The rest (AUS–RDU, CVG–MCO) are included in these numbers.

28
Bring Snacks
WanderNerd Reliability Score
66%
Arrive within 15 minutes
19 min
Average arrival delay
10.0%
Cancelled
5 min early
Median arrival delay

Based on 339 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

DL 4938 departing between 9 AM–12 PM arrived on time 84% of the time, versus 59% between 9 PM–12 AM.

Thursdays have been rough.

DL 4938 arrived on time 74% of the time on Saturdays and just 58% on Thursdays. That gap is worth planning around.

A bit behind the LGA–BHM route.

DL 4938 arrived on time 66% of the time, versus 72% across the LGA–BHM route.

Well behind the Delta Air Lines network.

DL 4938 arrived on time 66% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon71%(45 flights)
  • Tue67%(45 flights)
  • Wed69%(48 flights)
  • Thu58%(43 flights)
  • Fri68%(47 flights)
  • Sat74%(27 flights)
  • Sun60%(48 flights)
On-time by departure window
  • 9 AM–12 PM84%(25 flights)
  • 12–3 PM73%(11 flights)
  • 3–6 PM—(3 flights)
  • 6–9 PM68%(183 flights)
  • 9 PM–12 AM59%(81 flights)
On-time trend by month
50%
May

Jun 62% → May 50% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202562%26
July 202567%27
August 202571%35
September 202588%25
October 202563%24
November 202565%23
December 202563%27
January 202679%24
February 202677%22
March 202657%21
April 202652%25
May 202650%24
Departures on time
68%
Diverted
0.6%
Flights flown
303
Months covered
12

Same route, other flights

Keep nerding

Based on 339 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.