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Flight Reliability

DL 5751 · Delta Air Lines

New York → Washington (LGA–DCA)98% of its flights flew this route. The rest (LGA–CLT, LGA–STL) are included in these numbers.

31
Bring Snacks
WanderNerd Reliability Score
61%
Arrive within 15 minutes
18 min
Average arrival delay
8.5%
Cancelled
2 min early
Median arrival delay

Based on 282 historical flights. Data through May 2026.

What the data says

Thursdays have been rough.

DL 5751 arrived on time 68% of the time on Mondays and just 51% on Thursdays. That gap is worth planning around.

Lagging the LGA–DCA route.

DL 5751 arrived on time 61% of the time, versus 69% across the LGA–DCA route.

Well behind the Delta Air Lines network.

DL 5751 arrived on time 61% of the time, versus 81% across the Delta Air Lines network.

Keep a backup plan handy.

DL 5751 was cancelled 8.5% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon68%(41 flights)
  • Tue64%(45 flights)
  • Wed61%(44 flights)
  • Thu51%(41 flights)
  • Fri60%(42 flights)
  • Sat—(4 flights)
  • Sun54%(41 flights)
On-time by departure window
  • 3–6 PM—(4 flights)
  • 6–9 PM—(1 flights)
  • 9 PM–12 AM60%(253 flights)
On-time trend by month
58%
Apr

Jun 50% → Apr 58% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202550%26
July 202555%20
August 202592%24
September 202576%25
October 202563%24
November 202538%21
December 202559%17
January 202668%22
February 202664%22
March 202632%22
April 202658%26
Departures on time
60%
Diverted
0%
Flights flown
258
Months covered
12

Same route, other flights

Keep nerding

Based on 282 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.