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324 km · Domestic

Nantucket Memorial (ACK) – LaGuardia (LGA)

In July 2026, 223 flights operated between Nantucket Memorial and LaGuardia (both directions), and 77.1% left on time, according to the US BTS.

Flights operated · latest month223▼ 11.5%vs July 2025
On-time departures82.5%Average delay 11.1 min
Cancelled4.3%57 of 1,312 scheduled flights
Airlines2
Rank in country#2,013

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Partial coverage: only airlines that report on-time data to the US DOT · 10 of 10 periods have data

October 2024 June 2025 September 2025 May 2026 July 2026

Short series — ACK–LGA has only 10 months so far. Enough to show the level now, not enough to read a trend.

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods9 periods

Period	Flights operated 2025	Flights operated 2026	Change vs last year
January	–	–	–
February	–	–	–
March	–	–	–
April	–	–	–
May	40	44	▲ 10.0%
June	155	176	▲ 13.5%
July	252	223	▼ 11.5%
August	251	–	–
September	74	–	–
October	18	–	in progress
November	–	–	–
December	–	–	–

On-time departures by month

Partial coverage: only airlines that report on-time data to the US DOT · 10 of 10 periods have data

October 2024 June 2025 September 2025 May 2026 July 2026

Short series — ACK–LGA has only 10 months so far. Enough to show the level now, not enough to read a trend.

Departures within 15 minutes of schedule.

The most recent periods9 periods

Period	On-time departures 2025	On-time departures 2026	Change vs last year
January	–	–	–
February	–	–	–
March	–	–	–
April	–	–	–
May	90.0%	72.7%	▼ 19.2%
June	79.4%	84.7%	▲ 6.7%
July	79.8%	77.1%	▼ 3.4%
August	88.8%	–	–
September	86.5%	–	–
October	77.8%	–	in progress
November	–	–	–
December	–	–	–

Cancelled flights by month

Partial coverage: only airlines that report on-time data to the US DOT · 10 of 10 periods have data

October 2024 June 2025 September 2025 May 2026 July 2026

Short series — ACK–LGA has only 10 months so far. Enough to show the level now, not enough to read a trend.

The most recent periods9 periods

Period	Cancelled flights 2025	Cancelled flights 2026	Change vs last year
January	–	–	–
February	–	–	–
March	–	–	–
April	–	–	–
May	0	0	–
June	7	6	▼ 14.3%
July	12	27	▲ 125.0%
August	1	–	–
September	2	–	–
October	2	–	in progress
November	–	–	–
December	–	–	–

By direction

ACK → LGA

Scheduled flights: 656
Flights operated: 620
Cancelled: 36 · 5.5%
On-time departures: 81.0%

LGA → ACK

Scheduled flights: 656
Flights operated: 635
Cancelled: 21 · 3.2%
On-time departures: 83.9%

ACK → LGA and LGA → ACK counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026

Airline	Scheduled flights	Share	On-time departures	Cancelled
Republic Airways YX	1,034	78.8%	82.5%	46
JetBlue Airways B6	278	21.2%	82.4%	11

Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

Times are local to the departure airport of each flight; both directions are combined.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay13:00–14:005.8min · 216 recorded · 209 measured

Gap to highest-delay hour10.5min13:00 ↔ 12:00

Recorded flights1,312ACK–LGA

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT

Hover, tap or focus a point to see its value, sample and source.

View the figures

Departure hour	On-time departures	Average departure delay	With departure time	Recorded flights
00:00	No observations	—	—	—
01:00	No observations	—	—	—
02:00	No observations	—	—	—
03:00	No observations	—	—	—
04:00	No observations	—	—	—
05:00	No observations	—	—	—
06:00	No observations	—	—	—
07:00	No observations	—	—	—
08:00	No observations	—	—	—
09:00	Fewer than 200 measured departures	—	32	32
10:00	Fewer than 200 measured departures	—	161	163
11:00	Fewer than 200 measured departures	—	198	203
12:00	85.5%	16.4 min	235	242
13:00	85.2%	5.8 min	209	216
14:00	79.6%	16.0 min	201	215
15:00	Fewer than 200 measured departures	—	19	19
16:00	Fewer than 200 measured departures	—	169	186
17:00	Fewer than 200 measured departures	—	4	6
18:00	Fewer than 200 measured departures	—	18	20
19:00	Fewer than 200 measured departures	—	9	10
20:00	No observations	—	—	—
21:00	No observations	—	—	—
22:00	No observations	—	—	—
23:00	No observations	—	—	—

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT

Hover, tap or focus a point to see its value, sample and source.

View the figures

Day of week	On-time departures	Average departure delay	With departure time	Recorded flights
Monday	Fewer than 200 measured departures	—	174	182
Tuesday	Fewer than 200 measured departures	—	140	158
Wednesday	Fewer than 200 measured departures	—	153	154
Thursday	Fewer than 200 measured departures	—	185	192
Friday	84.2%	5.5 min	222	224
Saturday	Fewer than 200 measured departures	—	178	188
Sunday	79.8%	10.5 min	203	214

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures Partial coverage: only airlines that report on-time data to the US DOT

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT

Hover, tap or focus a point to see its value, sample and source.

View the figures

Month of year	On-time departures	Average departure delay	With departure time	Recorded flights
Jan	No observations	—	—	—
Feb	No observations	—	—	—
Mar	No observations	—	—	—
Apr	No observations	—	—	—
May	Fewer than 200 measured departures	—	84	84
Jun	82.2%	12.9 min	331	344
Jul	78.5%	19.5 min	475	514
Aug	88.8%	-0.1 min	251	252
Sep	Fewer than 200 measured departures	—	74	76
Oct	Fewer than 200 measured departures	—	40	42
Nov	No observations	—	—	—
Dec	No observations	—	—	—

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

On time 78.9% 1,035
Delayed >15 min 16.8% 220
Cancelled 4.3% 57
Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Flight numbers on this route

14

14 of 14

Flight numbers	By direction	Departures	On time
B662432	LGA → ACK	128	80.3%
B66831	ACK → LGA	128	82.1%
YX5856	ACK → LGA	126	86.4%
YX5856	LGA → ACK	126	89.6%
YX5737	LGA → ACK	109	80.2%
YX5737	ACK → LGA	109	69.0%
YX4599	LGA → ACK	76	88.2%
YX4599	ACK → LGA	76	90.7%
YX5712	LGA → ACK	55	81.5%
YX5712	ACK → LGA	55	77.4%
YX5767	LGA → ACK	55	80.4%
YX5767	ACK → LGA	55	83.0%
YX4546	ACK → LGA	50	79.1%
YX4546	LGA → ACK	50	91.3%

Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.

Monthly figures

Period	Flights operated	Change vs last year	Cancelled	On-time departures
July 2026	223	−11.5%	27	77.1%
June 2026	176	+13.5%	6	84.7%
May 2026	44	+10.0%	0	72.7%
October 2025	18	−18.2%	2	77.8%
September 2025	74		2	86.5%
August 2025	251		1	88.8%
July 2025	252		12	79.8%
June 2025	155		7	79.4%
May 2025	40		0	90.0%
October 2024	22		0	95.5%