Routes › New York (LGA) › LGA to ACK
Route · 12 months to July 2026
New York to Nantucket: on-time record
LaGuardia to Nantucket Memorial
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report. Data through July 2026; this is a monthly history, not live flight status.
Flights from New York (LGA) to Nantucket (ACK) arrived on time 78.4% of the time in the 12 months to July 2026. Reporting carriers scheduled 412 flights on the route in that period, about 1.1 a day, a distance of 202 miles.
That is 2.4 points above the national on-time share of 76.0% for the same period and 8.5 points above the 69.9% recorded for all departures from LGA. Flights that did arrive were 2.0 minutes early on average, and 3.4% of scheduled flights were cancelled (national: 1.8%).
2 reporting carriers flew the route at least 60 times. Republic Airline had the highest on-time share at 79.1% of 320 flights; JetBlue Airways had the lowest at 76.1% of 92.
By scheduled departure hour (local time at LGA), flights leaving from 11 am to 12 pm had the highest on-time share, 96.0%; those leaving from 2 pm to 3 pm had the lowest, 74.3%.
The on-time share is down 3.6 points on the previous 12 months (82.0%); cancellations moved from 2.9% to 3.4%.
Of the delay minutes that carriers assigned to a BTS cause category on this route, late-arriving aircraft 44%, air carrier 28% and national aviation system 24%.
- On time 78.4%
- Arrived 15+ minutes late 17.5%
- Cancelled 3.4%
- Diverted 0.7%
Airlines on the route compared
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| YX Republic Airline | 320 | 78% | 79.1% | -3.3 min | 3.1% |
| B6 JetBlue Airways | 92 | 22% | 76.1% | 2.6 min | 4.3% |
Carriers with at least 24 flights in the 12 months to July 2026. The on-time pill is green when a carrier is at or above the route's overall share. Regional carriers operate flights sold under larger airlines' brands; BTS lists the carrier that operated the flight.
Compared with the airports and the nation
| Measure | LGA to ACK | All departures from LGA | All arrivals at ACK | All reported flights |
|---|---|---|---|---|
| Arrived on time | 78.4% | 69.9% | 77.5% | 76.0% |
| Arrived 15+ minutes late | 17.5% | 25.2% | 18.1% | 21.9% |
| Cancelled | 3.4% | 4.6% | 3.8% | 1.8% |
| Diverted | 0.7% | 0.3% | 0.6% | 0.3% |
| Average arrival delay | -2.0 min | 10.3 min | 0.8 min | 8.1 min |
| Delay minutes per 100 flights | 958 | 1,986 | 1,196 | 1,684 |
| Scheduled flights | 412 | 135,840 | 1,690 | 7,043,858 |
12 months to July 2026. Delay minutes count late arrivals only (an early arrival is zero), so the per-100-flights row is a normalised total rather than an average of early and late.
The return direction, ACK to LGA, recorded 71.8% on time across 412 flights in the same period.
Month by month
Year on year: on time 78.4% against 82.0% (−3.6 pts), cancelled 3.4% against 2.9%, flights 412 against 416.
By scheduled departure hour
Delay causes
Seasonality
| Calendar month | Flights | On time | Cancelled | Avg arrival delay | Years in sample |
|---|---|---|---|---|---|
| May | 82 | 81.7% | 1.2% | -4.3 min | 3 |
| Jun | 272 | 77.6% | 1.8% | 0.3 min | 3 |
| Jul | 385 | 71.7% | 6.0% | 6.5 min | 3 |
| Aug | 368 | 86.7% | 1.4% | -4.0 min | 3 |
| Sep | 135 | 83.7% | 3.7% | 4.5 min | 3 |
| Oct | 59 | 79.7% | 1.7% | 3.8 min | 3 |
Each calendar month summed across the 36 months on file, so most rows combine three years. The pill compares the month with the route's own 12-month share.
Other routes from New York (LGA)
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| LGA–ORD | New York to Chicago | 11,611 | 64.2% | 20.1 min | 5.3% |
| LGA–ATL | New York to Atlanta | 8,411 | 73.1% | 8.2 min | 4.1% |
| LGA–BOS | New York to Boston | 7,343 | 69.7% | 8.8 min | 5.4% |
| LGA–DFW | New York to Dallas/Fort Worth | 6,700 | 66.8% | 13.2 min | 4.9% |
| LGA–MIA | New York to Miami | 5,986 | 67.3% | 15.9 min | 4.0% |
| LGA–MCO | New York to Orlando | 5,216 | 67.1% | 14.8 min | 4.2% |
| LGA–DCA | New York to Washington | 4,829 | 63.5% | 12.4 min | 5.4% |
| LGA–FLL | New York to Fort Lauderdale | 4,692 | 65.7% | 15.1 min | 4.3% |
All 78 routes and the airport record for LGA · airport record for ACK
Questions and answers
How often are flights from New York to Nantucket on time?
78.4% of the 412 flights scheduled from LGA to ACK in the 12 months to July 2026 arrived less than 15 minutes after their scheduled time. The national share for the same period was 76.0%. Cancelled and diverted flights count as not on time.
Which airline has the highest on-time share from LGA to ACK?
Among reporting carriers with at least 60 flights on the route, Republic Airline had the highest on-time share (79.1%), followed by JetBlue Airways (76.1%). Differences of a point or two on a few hundred flights are small.
What causes delays between New York and Nantucket?
For flights that arrived 15 or more minutes late, carriers attributed the delay minutes as follows: late-arriving aircraft 44%, air carrier 28%, national aviation system 24%, extreme weather 4%, security 0%. The categories are the carriers' own reports to BTS; weather that slows the wider system is usually recorded under the National Aviation System rather than extreme weather.
What time of day has the highest on-time share from LGA?
Flights scheduled to leave LGA from 11 am to 12 pm arrived on time 96.0% of the time, the highest of any hour with enough flights to compare. The lowest was 2 pm to 3 pm at 74.3%. Delays tend to build through the day as late aircraft carry over to later flights.
Is it getting better?
The on-time share for the 12 months to July 2026 was 78.4%, down 3.6 points on the previous 12 months (82.0%). The monthly chart on this page shows each of the last 36 months.
Where does this data come from?
Every figure is computed from the Bureau of Transportation Statistics Reporting Carrier On-Time Performance files, which list each scheduled domestic flight by the carriers required to report. This page covers August 2023 to July 2026. It shows totals and averages only; it is not a live flight-status service.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987 to present), monthly files August 2023 to July 2026, a US government work in the public domain. Figures are totals and averages over all scheduled flights by reporting carriers on the route; no individual flight or aircraft is identified. Times are local to the departure airport. The load factor and passenger counts from the BTS T-100 series are not included in this edition. See the methodology; report processing errors through corrections.