According to PlainFlights' airport traffic ranking (BTS On-Time Performance total flights), Nantucket, MA (ACK) ranks #219 of 382 tracked US airports by total flights (most flights = #1). Nantucket, MA posts bottom-quartile on-time performance among the 382 tracked U.S. airports, as a mid-size U.S. airport.
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ACK on-time rate vs. the national average
Ahead of the U.S. average across all 382 tracked airports.
Volume vs. on-time rate
Where Nantucket, MA sits on volume vs. on-time rate
Among the 382 U.S. airports in the BTS corpus, Nantucket, MA handles more flight
volume than 43% of them, and has a higher on-time rate than
18% of them, placing it in the quadrant for quiet and delay-prone.
Flight volume and on-time rate are independent figures: a busy airport can still run
reliably, and a quiet one can still run late.
Nantucket, MA vs. a 29-airport national peer sample, volume percentile vs. on-time-rate percentile.
Total flights (2020-2025): 17,080 ·
On-time rate: 80.5%
Delay Cause Breakdown
Top delay cause: Late Aircraft.
Total delay minutes178,866 min
Late Aircraft85,611 min · 48%
NAS (National Aviation System)48,089 min · 27%
Carrier39,582 min · 22%
Weather5,251 min · 3%
Security333 min · 0%
Source: U.S. DOT Bureau of Transportation Statistics, On-Time Performance
ACK - seasonal on-time pattern
Best: January (100%) · worst: July (87.1%)
ACK - on-time rate by year
2020–2025, year-over-year trend.
ACK - taxi-out and taxi-in (monthly)
Average taxi-out 16.6 min · taxi-in 6.8 min over the last 24 reported months (U.S. airport mean taxi-out ≈ 16.4 min).
ACK's average taxi-out (16.6 min) sits near the recent U.S. airport mean (~16.4 min). Month-to-month, it swings from 13.2 min (October 2022) to 21.0 min (July 2025).
Two PlainFlights-derived comparison paths for Nantucket, MA, both outside Massachusetts so the neighborhoods are not same-state geography. Axes stay disjoint: volume peers exclude the on-time peer set. Same-state compare stays below.
The standout signal at Nantucket, MA is the delay mix: Late Aircraft owns 47.9% of 178,866 delay minutes across 17,080 BTS flights. The on-time headline is 80.5% (1.5 pts above the 79% national average), with 3,324 delayed and 426 cancelled (2.49%).
Delay minutes concentrate in Late Aircraft (47.9% late-aircraft, 22.1% carrier, 26.9% NAS, 2.9% weather, 0.2% security). Mid-volume books still show a clear delay fingerprint rather than a weather-only story.
On the multi-year calendar, ACK is strongest in January (100% on-time) and weakest in July (87.1%), a 12.9-point swing. Volume peaks in July (~814 flights/month). The busiest connecting route is to JFK (New York) at 76.2% on-time. Field definitions: on-time performance explained.
Nantucket, MA vs. the national on-time distribution
On-time rate among all 382 tracked U.S. airports
80.5%Top 82%higher than 18% of 382 airports
Nantucket, MA
60%95%
U.S. airports by on-time rate, bucketed by value
Each bar is a band; taller bars hold more airports. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data (2020–2025).
Statistics reflect cumulative performance across all available reporting periods. On-time rates exclude cancelled and diverted flights.
ACK's on-time book sits in the slower half of the BTS set; check the delay mix and the worst month before treating the headline as typical.
Check the busiest route from ACK before you book a connection. See top routes →
Travel in January rather than July if your dates are flexible. Seasonal patterns →
Gate-to-wheels taxi-out averages 16.6 min here; check the monthly series before a tight connection. Taxi times →
On-time rate reflects the BTS historical average across all reporting carriers at this airport, not any single flight or airline.
Frequently Asked Questions
What is Nantucket, MA's on-time rate?
Nantucket, MA (ACK) has a 80.5% on-time rate across 17,080 BTS-tracked flights (2020-2025), 1.5 pts above the 79% national flight-weighted average; that places it in roughly the bottom-quartile on-time performance.
How does ACK rank among U.S. airports by traffic volume?
Nantucket, MA ranks #219 of 382 tracked US airports by total BTS flights (most flights = #1), making it a mid-size U.S. airport.
What's the most common cause of delays at Nantucket, MA?
Late Aircraft is the leading delay cause at ACK, accounting for 47.9% of delay minutes. The full breakdown: 47.9% late-aircraft, 22.1% carrier, 26.9% NAS/air-traffic-control, 2.9% weather, and 0.2% security.
When is the best time to fly through Nantucket, MA?
January is historically ACK's strongest month at 100% on-time, while July is the weakest at 87.1%, a 12.9-point swing across the BTS historical record.