Historical on-time performance
Boston to Nantucket
91 miData through Dec 2025Source: US DOT · BTS
Flights on BOS–ACK arrive on time 80% of the time over the last 12 months.
On-time rate80%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.5%of scheduled flights
based on 193 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- JetBlue AirwaysOn-time80%Medianon timep9040 minCancel0.5%Flights193
Why flights run late
Delay causes
- Airline12%
- Weather36%
- Air traffic (NAS)14%
- Late aircraft38%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly BOS → ACK
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 59% to 82% on time.
- Middays82% on time · p90 40 min · 386 flights
- Mornings80% on time · p90 40 min · 111 flights · limited
- Afternoons59% on time · p90 100 min · 125 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 86% on time.
- Wednesdays86% on time · p90 30 min · 69 flights · limited
- Saturdays81% on time · p90 40 min · 102 flights · limited
- Sundays78% on time · p90 35 min · 103 flights · limited
- Tuesdays77% on time · p90 45 min · 71 flights · limited
- Thursdays75% on time · p90 80 min · 88 flights · limited
- Fridays73% on time · p90 65 min · 102 flights · limited
- Mondays71% on time · p90 70 min · 87 flights · limited
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