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Flight Reliability

DL 5766 · Delta Air Lines

New York → Boston (LGA–BOS)86% of its flights flew this route. The rest (IND–LGA, LGA–SAV) are included in these numbers.

81
Pretty Reliable
WanderNerd Reliability Score
90%
Arrive within 15 minutes
4 min early
Average arrival delay
4.4%
Cancelled
11 min early
Median arrival delay

Based on 270 historical flights. Data through May 2026.

What the data says

Saturdays have been rough.

DL 5766 arrived on time 94% of the time on Thursdays and just 75% on Saturdays. That gap is worth planning around.

Well ahead of the LGA–BOS route.

DL 5766 arrived on time 90% of the time, versus 74% across the LGA–BOS route.

Better than the Delta Air Lines network average.

DL 5766 arrived on time 90% of the time, versus 81% across the Delta Air Lines network.

Keep a backup plan handy.

DL 5766 was cancelled 4.4% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon91%(45 flights)
  • Tue93%(45 flights)
  • Wed94%(47 flights)
  • Thu94%(48 flights)
  • Fri87%(45 flights)
  • Sat75%(24 flights)
  • Sun—(4 flights)
On-time by departure window
  • 6–9 AM91%(233 flights)
  • 9 AM–12 PM—(8 flights)
  • 12–3 PM—(4 flights)
  • 3–6 PM—(4 flights)
  • 6–9 PM—(9 flights)
On-time trend by month
77%
May

Jun 88% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202588%24
July 202596%23
August 202592%25
September 202587%23
October 202596%23
November 2025100%17
December 202585%27
January 202687%23
February 2026100%18
March 202680%20
April 202696%22
May 202677%13
Departures on time
92%
Diverted
0%
Flights flown
258
Months covered
12

Same route, other flights

Keep nerding

Based on 270 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.