Historical on-time performance
Washington to Nantucket
405 miData through Dec 2025Source: US DOT · BTS
Flights on DCA–ACK arrive on time 76% of the time over the last 12 months.
On-time rate76%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled3.1%of scheduled flights
based on 224 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Republic AirwaysbestOn-time83%Medianon timep9020 minCancel2.3%Flights132
- JetBlue AirwaysOn-time67%Medianon timep9040 minCancel4.3%Flights92
Why flights run late
Delay causes
- Airline16%
- Weather3%
- Air traffic (NAS)28%
- Late aircraft53%
- 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 DCA → 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 70% to 81% on time.
- Middays81% on time · p90 25 min · 207 flights
- Mornings79% on time · p90 35 min · 78 flights · limited
- Afternoons70% on time · p90 50 min · 579 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 63% to 79% on time.
- Wednesdays79% on time · p90 30 min · 107 flights · limited
- Saturdays78% on time · p90 30 min · 155 flights · limited
- Tuesdays76% on time · p90 30 min · 112 flights · limited
- Mondays75% on time · p90 30 min · 123 flights · limited
- Thursdays75% on time · p90 35 min · 119 flights · limited
- Fridays67% on time · p90 45 min · 122 flights · limited
- Sundays63% on time · p90 55 min · 126 flights · limited
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