Historical on-time performance
New York to Nantucket
199 miData through Dec 2025Source: US DOT · BTS
Flights on JFK–ACK arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled3.6%of scheduled flights
based on 278 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- Republic AirwaysOn-time86%Medianon timep9025 minCancel3.3%Flights92
- JetBlue AirwaysOn-time80%Medianon timep9035 minCancel3.8%Flights186
Why flights run late
Delay causes
- Airline42%
- Weather2%
- Air traffic (NAS)21%
- Late aircraft35%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly JFK → ACK
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Middays are the most reliable time of day to fly this route — 79% on time.
- Middays79% on time · p90 50 min · 711 flights
- Afternoons70% on time · p90 70 min · 251 flights
- Mornings68% on time · p90 80 min · 148 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 66% to 80% on time.
- Wednesdays80% on time · p90 60 min · 147 flights · limited
- Thursdays80% on time · p90 25 min · 161 flights · limited
- Tuesdays79% on time · p90 35 min · 150 flights · limited
- Fridays78% on time · p90 60 min · 161 flights · limited
- Saturdays75% on time · p90 75 min · 174 flights · limited
- Mondays71% on time · p90 60 min · 157 flights · limited
- Sundays66% on time · p90 90 min · 160 flights · limited
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