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Flight Reliability

DL 5725 · Delta Air Lines

New York → Boston (LGA–BOS)100% of its flights flew this route. The rest (LGA–GSO) are included in these numbers.

41
Bring Snacks
WanderNerd Reliability Score
67%
Arrive within 15 minutes
17 min
Average arrival delay
7.3%
Cancelled
4 min early
Median arrival delay

Based on 358 historical flights. Data through May 2026.

What the data says

Thursdays have been rough.

DL 5725 arrived on time 87% of the time on Saturdays and just 51% on Thursdays. That gap is worth planning around.

Lagging the LGA–BOS route.

DL 5725 arrived on time 67% of the time, versus 74% across the LGA–BOS route.

Lagging the Delta Air Lines network.

DL 5725 arrived on time 67% of the time, versus 81% across the Delta Air Lines network.

Keep a backup plan handy.

DL 5725 was cancelled 7.3% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon71%(44 flights)
  • Tue62%(50 flights)
  • Wed68%(47 flights)
  • Thu51%(47 flights)
  • Fri63%(49 flights)
  • Sat87%(45 flights)
  • Sun67%(49 flights)
On-time by departure window
  • 3–6 PM67%(329 flights)
  • 6–9 PM—(2 flights)
On-time trend by month
62%
May

Jun 50% → May 62% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202550%28
July 202563%27
August 202587%30
September 202543%28
October 202562%29
November 202562%26
December 202579%29
January 2026100%28
February 202669%26
March 202662%26
April 202661%28
May 202662%26
Departures on time
70%
Diverted
0.3%
Flights flown
331
Months covered
12

Same route, other flights

Keep nerding

Based on 358 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.