Flight Reliability
DL 5727 · Delta Air Lines
New York → Boston (LGA–BOS)95% of its flights flew this route. The rest (CHS–BOS, BOS–RDU) are included in these numbers.
- 62%
- Arrive within 15 minutes
- 20 min
- Average arrival delay
- 4.2%
- Cancelled
- 2 min
- Median arrival delay
Based on 283 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
DL 5727 departing between 12–3 PM arrived on time 74% of the time, versus 60% between 3–6 PM.
Mondays have been rough.
DL 5727 arrived on time 73% of the time on Wednesdays and just 55% on Mondays. That gap is worth planning around.
Lagging the LGA–BOS route.
DL 5727 arrived on time 62% of the time, versus 74% across the LGA–BOS route.
Well behind the Delta Air Lines network.
DL 5727 arrived on time 62% of the time, versus 81% across the Delta Air Lines network.
The breakdown
- Mon55%(44 flights)
- Tue67%(45 flights)
- Wed73%(44 flights)
- Thu58%(40 flights)
- Fri58%(45 flights)
- Sat—(6 flights)
- Sun60%(47 flights)
- 12–3 PM74%(39 flights)
- 3–6 PM60%(232 flights)
Jun 60% → May 64% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 60% | 25 |
| July 2025 | 44% | 25 |
| August 2025 | 76% | 25 |
| September 2025 | 39% | 26 |
| October 2025 | 42% | 26 |
| November 2025 | 71% | 24 |
| December 2025 | 64% | 25 |
| January 2026 | 91% | 11 |
| February 2026 | 80% | 10 |
| March 2026 | 75% | 20 |
| April 2026 | 69% | 26 |
| May 2026 | 64% | 28 |
- Departures on time
- 65%
- Diverted
- 0%
- Flights flown
- 271
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 283 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.