Plan a flight · Mon 1:14 am EDT (05:14 UTC)

Patrick Leahy Burlington International to Nantucket Memorial BTV → ACK

236 nautical miles (272 statute miles) southeast on a straight line, true course 144°, about 159° magnetic at the departure end (variation 15W). At 120 knots that is 1 h 46 min at the quickest height in today's winds (9,500 ft, a 14-knot tailwind), arriving about 3:00 am EDT (07:00 UTC), after sunset at the destination. Right now BTV is VFR, wind calm; ACK is IFR, wind from the east (080°) at 9 knots, gusting to 18. For planning, not a briefing: the legal preflight briefing comes from Flight Service (1-800-WX-BRIEF) or the FAA's own tools. Airlines fly this pair: 3 flights in the DOT's last twelve reported months, the route's page.

The route the straight line, the warnings crossed, restrictions, pilot reports and the airports along the way · click a mark for its words

Green, blue, red and purple airport dots are the flying conditions reported there now (VFR, marginal VFR, IFR, low IFR); grey means no report. Red areas are SIGMETs, orange areas AIRMETs, hatched red areas temporary flight restrictions. Map tiles: OpenFreeMap, data © OpenStreetMap contributors.

Warnings the route crosses SIGMETs and AIRMETs whose area the line passes through or comes within 25 nm of

SIGMET E18E: thunderstorms (a convective SIGMET) up to 30,000 ft, moving from the southwest at 35 knots, until 2:55 am EDT (06:55 UTC). Over the last 59 nm of the route.

as issued

WSUS31 KKCI 120455
MKCE WST 120455
CONVECTIVE SIGMET 18E
VALID UNTIL 0655Z
MA RI CT AND MA RI NY CSTL WTRS
FROM 40E BOS-130SE ACK-170S ACK-50SE HTO-20NW PVD-40E BOS
AREA EMBD TS MOV FROM 24035KT. TOPS TO FL300.

AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the whole route.
AIRMET ZULU 1C: moderate icing up to 22,000 ft. Over the first 148 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the first 217 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 98 nm of the route.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 10,000 ft. Over the last 167 nm of the route.
AIRMET TANGO 4W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Over the last 39 nm of the route.

A SIGMET warns of weather hazardous to all aircraft; an AIRMET of weather that matters to small aircraft and to flying without instruments. "From 60 to 180 nm out" is measured along the route from BTV.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

UAL330 at 35,000 ft, 4 nm southwest, 12:30 am EDT (04:30 UTC): moderate turbulence, wind 235° at 92 knots. 108 nm along the route, 4 nm southwest of the line.
as filed, and in English
```
ARP UAL330 4257N 07145W 0430 F350 235/092KT TB MOD TURB CONT MOD CHOP IC
```
Report
a routine report filed through ARP
UAL932 at 35,000 ft, 33 nm northeast, 12:34 am EDT (04:34 UTC): moderate turbulence, wind 240° at 69 knots. 197 nm along the route, 33 nm northeast of the line.
as filed, and in English
```
ARP UAL932 4206N 06957W 0434 F350 240/069KT TB MOD TURB IC
```
Report
a routine report filed through ARP
UAL932 at 35,000 ft, 30 nm northeast, 12:33 am EDT (04:33 UTC): moderate turbulence. 197 nm along the route, 30 nm northeast of the line.
as filed, and in English
```
ARP UAL932 4206N 07001W 0433 F350 TB MODERATE SK CLEAR IC NONE
```
Report
a routine report filed through ARP
CRJ7 descending, 7 nm northeast, 12:09 am EDT (04:09 UTC): a routine report with nothing remarked on. 118 nm along the route, 7 nm northeast of the line.
as filed, and in English
```
MHT UA /OV RWY 6/TM 0409/FLDURD/TP CRJ7/SK 006
```
Report
a routine report filed through MHT
Where
runway 6
Time
04:09 UTC
Height
during the descent
Aircraft
CRJ7
Sky
at 600 ft
CRJ9 descending, 7 nm northeast, 11:16 pm EDT (03:16 UTC): a routine report with nothing remarked on. 118 nm along the route, 7 nm northeast of the line.
as filed, and in English
```
MHT UA /OV RWY 6/TM 0316/FLDURD/TP CRJ9/SK 004
```
Report
a routine report filed through MHT
Where
runway 6
Time
03:16 UTC
Height
during the descent
Aircraft
CRJ9
Sky
at 400 ft
B38M descending, 7 nm northeast, 10:53 pm EDT (02:53 UTC): overcast above 1,500 ft; scattered clouds above 500 ft. 118 nm along the route, 7 nm northeast of the line.
as filed, and in English
```
MHT UA /OV RWY 17/TM 0253/FLDURD/TP B38M/SK 015 OVC / 005 SCT
```
Report
a routine report filed through MHT
Where
runway 17
Time
02:53 UTC
Height
during the descent
Aircraft
B38M
Sky
at 1,500 ft overcast; at 500 ft scattered
B738 at 300 ft, 3 nm northeast, 11:00 pm EDT (03:00 UTC): a broken layer above 500 ft, remarks: during the descent runway 4R bos. 158 nm along the route, 3 nm northeast of the line.
as filed, and in English
```
BOS UA /OV KBOS/TM 0300/FL003/TP B738/SK BKN005/RM DURD RY 4R BOS
```
Report
a routine report filed through BOS
Where
over KBOS
Time
03:00 UTC
Height
at 300 ft
Aircraft
B738
Sky
a broken layer from 500 ft
Remarks
during the descent runway 4R bos

Winds aloft along the route, and the time en route the forecast for use 02:00–09:00 UTC · at 120 knots true airspeed

The eastbound cruising heights for this course (VFR: odd thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 3 forecast points nearest it (BML, BOS, ACK). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
3,500 ft	220° at 10 kt	+2 kt		118 kt	2 h	3:14 am EDT (07:14 UTC)
5,500 ft	240° at 15 kt	−1 kt		121 kt	1 h 57 min	3:11 am EDT (07:11 UTC)
7,500 ft	260° at 18 kt	−8 kt	9 °C	128 kt	1 h 51 min	3:05 am EDT (07:05 UTC)
9,500 ft	270° at 22 kt	−14 kt	6 °C	134 kt	1 h 46 min	3:00 am EDT (07:00 UTC)
11,500 ft	260° at 24 kt	−12 kt	3 °C	132 kt	1 h 47 min	3:01 am EDT (07:01 UTC)
13,500 ft	260° at 26 kt	−11 kt	-1 °C	131 kt	1 h 48 min	3:02 am EDT (07:02 UTC)
15,500 ft	250° at 30 kt	−10 kt	-5 °C	130 kt	1 h 49 min	3:03 am EDT (07:03 UTC)
17,500 ft	250° at 33 kt	−9 kt	-9 °C	129 kt	1 h 50 min	3:04 am EDT (07:04 UTC)
18,000 ft FL180	250° at 34 kt	−9 kt	-10 °C	129 kt	1 h 50 min	3:04 am EDT (07:04 UTC)
24,000 ft FL240	230° at 52 kt	+1 kt	-20 °C	119 kt	1 h 59 min	3:13 am EDT (07:13 UTC)
30,000 ft FL300	240° at 67 kt	−1 kt	-34 °C	121 kt	1 h 57 min	3:11 am EDT (07:11 UTC)
34,000 ft FL340	240° at 86 kt	−8 kt	-42 °C	128 kt	1 h 51 min	3:05 am EDT (07:05 UTC)
39,000 ft FL390	240° at 90 kt	−8 kt	-53 °C	128 kt	1 h 51 min	3:05 am EDT (07:05 UTC)

Based on data from the 12th at 00:00 UTC; valid on the 12th at 06:00 UTC for use 02:00 to 09:00 UTC; temperatures above 24,000 ft are below zero. Heights are above sea level; a height is left out when the forecast has no wind for it over most of the line (the ground is higher). Ground speed is the airspeed less the headwind; the time en route is for the straight line and ignores climb, descent and routing around weather.

The forecast points as issued

Point	From	3,000	6,000	9,000	12,000	18,000	24,000	30,000	34,000	39,000
BML	used from 0 nm out; 75 nm from the line	260/22	300/13 8°	280/13 4°	260/13 0°	260/16 -11°	240/45 -21°	240/59 -36°	240/77 -44°	240/83 -53°
BOS	used from 98 nm out; 34 nm from the line	110/20	200/26 12°	280/24 8°	260/29 3°	250/47 -10°	230/59 -19°	230/74 -33°	240/95 -41°	240/96 -53°
ACK	used from 197 nm out; 20 nm from the line	230/29	270/37 16°	270/38 10°	270/40 4°	240/46 -8°	230/52 -17°	240/74 -31°	240/83 -41°	240/91 -53°

The weather now: both ends and the airports along the way public airports with a weather report within 25 nm of the line, one for each stretch

Airport	Where	Conditions	Wind	Visibility	Ceiling	Elevation	Reported
BTV Burlington, VT	departure	VFR Sky: scattered clouds at 3,700 feet, a broken layer at 4,400 feet, overcast at 9,500 feet Weather: light rain	calm	8 mi	4,400 ft	334 ft	12:54 am EDT (04:54 UTC)
MPV Barre/Montpelier, VT	30 nm out, 11 nm northeast of the line	VFR Sky: a broken layer at 3,800 feet, overcast at 7,000 feet Weather: light rain	calm	10+ mi	3,800 ft	1,165 ft	04:51 UTC
LEB Lebanon, NH	59 nm out, 4 nm southeast of the line, tower	VFR Sky: a few clouds at 2,000 feet, overcast at 3,600 feet Weather: light rain	from the north (360°) at 3 knots	7 mi	3,600 ft	603 ft	04:53 UTC
ASH Nashua, NH	128 nm out, 4 nm northwest of the line, tower	low IFR Sky: overcast at 400 feet Weather: light rain, mist	from the north-northwest (340°) at 5 knots	4 mi	400 ft	200 ft	04:56 UTC
BOS Boston, MA	158 nm out, 3 nm northeast of the line, tower	IFR Sky: a broken layer at 500 feet, a broken layer at 2,700 feet, overcast at 4,000 feet Weather: light rain, mist	from the north-northeast (030°) at 11 knots	4 mi	500 ft	19 ft	04:57 UTC
HYA Hyannis, MA	207 nm out, 7 nm east of the line, tower	IFR Sky: overcast at 600 feet Weather: heavy rain, mist	from the north-northeast (030°) at 8 knots, gusting to 17	4 mi	600 ft	54 ft	04:56 UTC
ACK Nantucket, MA	destination	IFR Sky: a broken layer at 700 feet, overcast at 1,300 feet Weather: light rain, mist	from the east (080°) at 9 knots, gusting to 18	4 mi	700 ft	46 ft	12:53 am EDT (04:53 UTC)

The highest airport on this list sits at 1,165 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At ACK when you get there the forecast at the estimated arrival, 3:00 am EDT (07:00 UTC)

Wind from the east-northeast at 15 knots, visibility 1 mile, light rain showers, mist, overcast at 300 feet low IFR

The whole forecast for ACK

From Sun 8:00 pm EDT (00:00 UTC): wind from the east at 11 knots, visibility more than 6 miles, light rain, a few clouds at 2,400 feet, scattered clouds at 3,500 feet and more above
From Sun 10:00 pm EDT (02:00 UTC): wind from the east at 14 knots, gusting to 24, visibility 2 miles, rain, mist, overcast at 1,000 feet
From Mon 1:00 am EDT (05:00 UTC): wind from the east at 16 knots, gusting to 23, visibility 3 miles, rain, mist, overcast at 300 feet
From Mon 3:00 am EDT (07:00 UTC): wind from the east-northeast at 15 knots, visibility 1 mile, light rain showers, mist, overcast at 300 feet
From Mon 5:00 am EDT (09:00 UTC): wind from the north-northeast at 15 knots, visibility ¾ mile, mist, overcast at 300 feet
30% chance between Mon 5:00 am EDT (09:00 UTC) and 6:00 am EDT (10:00 UTC): visibility ¾ mile, light rain showers, mist, overcast at 100 feet
From Mon 11:00 am EDT (15:00 UTC): wind from the north-northeast at 15 knots, visibility more than 6 miles, a broken layer at 800 feet
From Mon 4:00 pm EDT (20:00 UTC): wind from the north at 13 knots, gusting to 21, visibility more than 6 miles, scattered clouds at 3,000 feet

The forecast for BTV, the departure

From Sun 8:00 pm EDT (00:00 UTC): wind from the south at 8 knots, gusting to 16, visibility more than 6 miles, overcast at 6,000 feet
30% chance between Sun 8:00 pm EDT (00:00 UTC) and 12:00 am EDT (04:00 UTC): visibility 5 miles, light rain, mist, overcast at 3,500 feet
From Mon 12:00 am EDT (04:00 UTC): wind from the south at 7 knots, visibility more than 6 miles, overcast at 3,500 feet
30% chance between Mon 12:00 am EDT (04:00 UTC) and 2:00 am EDT (06:00 UTC): visibility 5 miles, light rain, mist
From Mon 5:00 am EDT (09:00 UTC): wind light and variable, visibility more than 6 miles, overcast at 1,500 feet
From Mon 8:00 am EDT (12:00 UTC): wind light and variable, visibility more than 6 miles, a broken layer at 4,000 feet
From Mon 2:00 pm EDT (18:00 UTC): wind from the north at 6 knots, visibility more than 6 miles, a broken layer at 2,500 feet

Temporary flight restrictions on the line or within 25 nm of it

6/8802 Foxborough, MA, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 15 nm from the route, 167 nm along the route · drones kept away from a public gathering · starts Saturday 17 October · ZBW

Daylight

Sunset at BTV 6:13 pm EDT (22:13 UTC), at ACK 6:04 pm EDT (22:04 UTC) (civil twilight ends 6:32 pm EDT (22:32 UTC)). At 120 knots the arrival at ACK is before sunrise there (6:48 am EDT (10:48 UTC)).

Each restriction opens the FAA's own page with the exact area, heights and times. Ordinary notices to air missions (closed runways, lights out) are not shown: the FAA's notice search is not open to sites like this one at this time.

Radar and forecast charts for the regions crossed government pictures, the latest each time the page loads

Radar now, the Northeast · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

Forecast chart, 24 hours ahead Weather Prediction Center

Sources: the Aviation Weather Center's data service (SIGMETs, AIRMETs, graphical AIRMETs, pilot reports, winds and temperatures aloft, observations and terminal forecasts), the National Weather Service radar, the Weather Prediction Center's charts, the FAA's temporary flight restriction list and shapes, and the FAA's airport file for the positions, elevations and magnetic variation. Fetched when the page is viewed and kept a few minutes. Each leg is the straight line between its two airports; airways, terrain and airspace are not considered. The airports in detail: Patrick Leahy Burlington International, Nantucket Memorial.