ACK to LGA flight delays & on-time performance
Nonstop flights from Nantucket Memorial Airport to LaGuardia Airport · 202 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ACK or LGA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Nantucket (ACK) to New York (LGA) arrived on time 76% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 5.8% were cancelled, and 12% arrived an hour or more late.
- JetBlue was the most punctual airline here (82% on time); Republic Airways was the least (75%).
- Departures scheduled around 1pm did best (83% on time); around 4pm did worst (73%).
- Tuesday was the most reliable day to fly (90% on time) and Wednesday the least (67%).
- The largest source of delay minutes was air traffic control & airport congestion (55%).
Which airline is most on time from ACK to LGA?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| JetBlue | 82% | 3.3% | 18 min | 11.2% | 92 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 75% | 6.6% | 23 min | 11.7% | 320 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 11am82%96 flights
- 12pm75%109 flights
- 1pm83%30 flights
- 2pm77%50 flights
- 4pm73%109 flights
- 7pm56%10 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday71%5.2% cancelled
- Tuesday90%16.7% cancelled
- Wednesday67%2.2% cancelled
- Thursday81%1.7% cancelled
- Friday83%1.4% cancelled
- Saturday73%6.7% cancelled
- Sunday70%8.8% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Air traffic control & airport congestion55%
- Late-arriving aircraft26%
- Airline (crew, maintenance, cleaning, fueling)16%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather38%
- Airline (crew, maintenance, cleaning, fueling)33%
- Air traffic control & airport congestion29%
- Security0%
ACK to LGA: common questions
- How often are ACK to LGA flights on time?
- 76% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Nantucket to New York cancelled?
- 5.8% of scheduled flights were cancelled (24 of 412).
- How long are typical delays?
- Across all flights the average arrival delay was 22 min (early arrivals count as zero). Flights that were late arrived 90 min behind schedule on average, and 11.6% of flights were an hour or more late.
- How long is taxi time at ACK?
- Flights on this route spent 21 min taxiing from the gate to takeoff on average.
Related routes
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ACK → LGA, nonstop flights by US airlines that report to the DOT. How we calculate this.