Nantucket Memorial to Patrick Leahy Burlington International ACK → BTV
236 nautical miles (272 statute miles) northwest on a straight line, true course 326°, about 340° magnetic at the departure end (variation 14W). At 120 knots that is 1 h 44 min at the quickest height in today's winds (4,500 ft, a 16-knot tailwind), arriving about 11:51 pm EDT (03:51 UTC), after sunset at the destination. 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
- 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 first 207 nm of the route.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 13,000 ft. Over the whole route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 187 nm of the route.
- AIRMET ZULU 1C: moderate icing up to 22,000 ft. Over the last 177 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 138 to 217 nm out.
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 ACK.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- BCS3 at 18,000 ft, 19 nm west, 8:17 pm EDT (00:17 UTC): moderate chop turbulence, remarks: moderate CHOP180-210 smooth above 22,000 ft. 39 nm along the route, 19 nm west of the line.
as filed, and in English
EWB UA /OV EWB/TM 0017/FL180/TP BCS3/TB MOD CHOP/RM MOD CHOP180-210 SMOOTH ABOVE FL220
- Report
- a routine report filed through EWB
- Where
- over EWB
- Time
- 00:17 UTC
- Height
- at 18,000 ft
- Aircraft
- BCS3
- Turbulence
- moderate chop
- Remarks
- moderate CHOP180-210 smooth above 22,000 ft
- A321 at 5,000 ft, 7 nm northeast, 8:46 pm EDT (00:46 UTC): moderate turbulence from 5,000 ft to 15,000 ft. 59 nm along the route, 7 nm northeast of the line.
as filed, and in English
BOS UA /OV BOS150020/TM 0046/FL050/TP A321/TB MOD 150-050
- Report
- a routine report filed through BOS
- Where
- 20 nm southeast (150°) of BOS
- Time
- 00:46 UTC
- Height
- at 5,000 ft
- Aircraft
- A321
- Turbulence
- moderate from 15,000 ft to 5,000 ft
- BCS3 at 12,000 ft, 10 nm west, 8:11 pm EDT (00:11 UTC): moderate turbulence, rain, remarks: ssoxs dept from 12,000 ft to 16,000 ft. 59 nm along the route, 10 nm west of the line.
as filed, and in English
BOS UA /OV BOS200020/TM 0011/FL120/TP BCS3/WX RA+/TB MOD/RM SSOXS DEPT 120-160
- Report
- a routine report filed through BOS
- Where
- 20 nm south (200°) of BOS
- Time
- 00:11 UTC
- Height
- at 12,000 ft
- Aircraft
- BCS3
- Weather
- ra+
- Turbulence
- moderate
- Remarks
- ssoxs dept from 12,000 ft to 16,000 ft
- E75S at 16,000 ft, 41 nm southwest, 7:35 pm EDT (23:35 UTC): moderate clear-air turbulence above 16,000 ft, remarks: moderate in +ra to light chop. 79 nm along the route, 41 nm southwest of the line.
as filed, and in English
SFZ UA /OV PUT360003/TM 2335/FL160/TP E75S/TB MOD 160 CAT/RM MOD IN +RA TO LGT CHOP
- Report
- a routine report filed through SFZ
- Where
- 3 nm north (360°) of PUT
- Time
- 23:35 UTC
- Height
- at 16,000 ft
- Aircraft
- E75S
- Turbulence
- moderate at 16,000 ft clear-air turbulence
- Remarks
- moderate in +ra to light chop
- A333 at 15,000 ft, 34 nm northeast, 9:37 pm EDT (01:37 UTC): moderate chop turbulence up to 15,000 ft, remarks: during the climb. 108 nm along the route, 34 nm northeast of the line.
as filed, and in English
PSM UA /OV PSM/TM 0137/FL150/TP A333/TB MOD CHOP BLO 150/RM DURC
- Report
- a routine report filed through PSM
- Where
- over PSM
- Time
- 01:37 UTC
- Height
- at 15,000 ft
- Aircraft
- A333
- Turbulence
- moderate chop below 15,000 ft
- Remarks
- during the climb
- GLF4 at 10,000 ft, 48 nm southwest, 9:03 pm EDT (01:03 UTC): moderate turbulence above 10,000 ft, light rain, remarks: instrument conditions. 108 nm along the route, 48 nm southwest of the line.
as filed, and in English
BDL UA /OV CEF060010/TM 0103/FL100/TP GLF4/WX -RA/TB MOD 100/RM IMC
- Report
- a routine report filed through BDL
- Where
- 10 nm northeast (060°) of CEF
- Time
- 01:03 UTC
- Height
- at 10,000 ft
- Aircraft
- GLF4
- Weather
- light rain
- Turbulence
- moderate at 10,000 ft
- Remarks
- instrument conditions
- B764 at 35,000 ft, 33 nm south, 7:18 pm EDT (23:18 UTC): light to moderate turbulence. At the departure end, 33 nm south of the line.
as filed, and in English
ACK UA /OV ACK200035/TM 2318/FL350/TP B764/TB LGT OCNL MOD
- Report
- a routine report filed through ACK
- Where
- 35 nm south (200°) of ACK
- Time
- 23:18 UTC
- Height
- at 35,000 ft
- Aircraft
- B764
- Turbulence
- light occasional moderate
- E75S at 12,000 ft, 19 nm west, 8:59 pm EDT (00:59 UTC): light turbulence, remarks: during the climb from 12,000 ft to 17,000 ft smooth above 18,000 ft. 39 nm along the route, 19 nm west of the line.
as filed, and in English
EWB UA /OV EWB/TM 0059/FL120/TP E75S/TB LGT MOD/RM DURC 120-170 SMOOTH ABOVE 180
- Report
- a routine report filed through EWB
- Where
- over EWB
- Time
- 00:59 UTC
- Height
- at 12,000 ft
- Aircraft
- E75S
- Turbulence
- light moderate
- Remarks
- during the climb from 12,000 ft to 17,000 ft smooth above 18,000 ft
- BC3 at 20,000 ft, 3 nm southwest, 7:51 pm EDT (23:51 UTC): light chop turbulence, remarks: during the climb from 14,000 ft to 20,000 ft ssoxs sid. 49 nm along the route, 3 nm southwest of the line.
as filed, and in English
PYM UA /OV PYM/TM 2351/FL200/TP BC3/TB LGT CHOP/RM DURC 140-200 SSOXS SID
- Report
- a routine report filed through PYM
- Where
- over PYM
- Time
- 23:51 UTC
- Height
- at 20,000 ft
- Aircraft
- BC3
- Turbulence
- light chop
- Remarks
- during the climb from 14,000 ft to 20,000 ft ssoxs sid
- E75S at 11,000 ft, 16 nm southwest, 7:59 pm EDT (23:59 UTC): light to moderate turbulence. 59 nm along the route, 16 nm southwest of the line.
as filed, and in English
BOS UA /OV BOS210025/TM 2359/FL110/TP E75S/TB LGT TO MOD
- Report
- a routine report filed through BOS
- Where
- 25 nm southwest (210°) of BOS
- Time
- 23:59 UTC
- Height
- at 11,000 ft
- Aircraft
- E75S
- Turbulence
- light to moderate
- B738 at 18,000 ft, 5 nm northwest, 7:47 pm EDT (23:47 UTC): light chop turbulence, remarks: better at at 19,000 ft. 59 nm along the route, 5 nm northwest of the line.
as filed, and in English
BOS UA /OV BOS180015/TM 2347/FL180/TP B738/TB CONS LGT CHOP OCNL MOD CHOP 080-180/RM BETTER AT 190
- Report
- a routine report filed through BOS
- Where
- 15 nm south (180°) of BOS
- Time
- 23:47 UTC
- Height
- at 18,000 ft
- Aircraft
- B738
- Turbulence
- continuous light chop occasional moderate chop from 8,000 ft to 18,000 ft
- Remarks
- better at at 19,000 ft
- BCS3 at 600 ft, 5 nm northeast, 9:20 pm EDT (01:20 UTC): a broken layer above 600 ft, remarks: during the descent runway 22L bos. 79 nm along the route, 5 nm northeast of the line.
as filed, and in English
BOS UA /OV KBOS040002/TM 0120/FL006/TP BCS3/SK BKN006/RM DURD RY 22L BOS
- Report
- a routine report filed through BOS
- Where
- 2 nm northeast (040°) of KBOS
- Time
- 01:20 UTC
- Height
- at 600 ft
- Aircraft
- BCS3
- Sky
- a broken layer from 600 ft
- Remarks
- during the descent runway 22L bos
- A321 , 3 nm northeast, 8:56 pm EDT (00:56 UTC): remarks: braking action fair during landing runway 22L bos. 79 nm along the route, 3 nm northeast of the line.
as filed, and in English
BOS UA /OV KBOS/TM 0056/FL000/TP A321/RM BRAKING ACTION FAIR DURING LANDING RY 22L BOS
- Report
- a routine report filed through BOS
- Where
- over KBOS
- Time
- 00:56 UTC
- Height
- at 0 ft
- Aircraft
- A321
- Remarks
- braking action fair during landing runway 22L bos
- B772 at 37,000 ft, 49 nm southwest, 8:04 pm EDT (00:04 UTC): light turbulence. 79 nm along the route, 49 nm southwest of the line.
as filed, and in English
IJD UA /OV LZD/TM 0004/FL370/TP B772/TB LGT MOD CHOP 370
- Report
- a routine report filed through IJD
- Where
- over LZD
- Time
- 00:04 UTC
- Height
- at 37,000 ft
- Aircraft
- B772
- Turbulence
- light moderate chop at 37,000 ft
8 more routine reports are on the map.
Winds aloft along the route, and the time en route the forecast for use 20:00–03:00 UTC · at 120 knots true airspeed
The westbound cruising heights for this course (VFR: even 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 (ACK, BOS, BML). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 4,500 ft | 180° at 20 kt | −16 kt | 136 kt | 1 h 44 min | 11:51 pm EDT (03:51 UTC) | |
| 6,500 ft | 200° at 20 kt | −12 kt | 8 °C | 132 kt | 1 h 47 min | 11:54 pm EDT (03:54 UTC) |
| 8,500 ft | 230° at 18 kt | −2 kt | 7 °C | 122 kt | 1 h 56 min | 12:03 am EDT (04:03 UTC) |
| 10,500 ft | 250° at 23 kt | +5 kt | 4 °C | 115 kt | 2 h 03 min | 12:10 am EDT (04:10 UTC) |
| 12,500 ft | 250° at 30 kt | +9 kt | 0 °C | 111 kt | 2 h 08 min | 12:15 am EDT (04:15 UTC) |
| 14,500 ft | 250° at 32 kt | +9 kt | -3 °C | 111 kt | 2 h 08 min | 12:15 am EDT (04:15 UTC) |
| 16,500 ft | 250° at 35 kt | +9 kt | -6 °C | 111 kt | 2 h 08 min | 12:15 am EDT (04:15 UTC) |
| 18,000 ft FL180 | 250° at 37 kt | +9 kt | -8 °C | 111 kt | 2 h 08 min | 12:15 am EDT (04:15 UTC) |
| 24,000 ft FL240 | 250° at 49 kt | +11 kt | -18 °C | 109 kt | 2 h 10 min | 12:17 am EDT (04:17 UTC) |
| 30,000 ft FL300 | 240° at 63 kt | +10 kt | -33 °C | 110 kt | 2 h 09 min | 12:16 am EDT (04:16 UTC) |
| 34,000 ft FL340 | 250° at 77 kt | +20 kt | -43 °C | 100 kt | 2 h 22 min | 12:29 am EDT (04:29 UTC) |
| 39,000 ft FL390 | 250° at 100 kt | +26 kt | -55 °C | 94 kt | 2 h 31 min | 12:38 am EDT (04:38 UTC) |
Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| ACK | used from 0 nm out; 25 nm from the line | 150/19 | 170/30 8° | 210/31 9° | 230/42 3° | 250/44 -7° | 250/50 -17° | 240/62 -32° | 250/71 -42° | 250/86 -55° |
| BOS | used from 49 nm out; 6 nm from the line | 160/27 | 190/23 9° | 260/20 7° | 260/32 1° | 250/48 -7° | 240/56 -17° | 240/59 -33° | 250/75 -43° | 250/94 -55° |
| BML | used from 148 nm out; 75 nm from the line | 220/19 | 210/17 9° | 240/12 4° | 270/22 1° | 250/21 -11° | 260/41 -19° | 250/68 -34° | 250/82 -44° | 250/115 -55° |
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 |
|---|---|---|---|---|---|---|---|
| ACK Nantucket, MA | departure | no report just now | 46 ft | ||||
| HYA Hyannis, MA | 30 nm out, 7 nm east of the line, tower | no report just now | 54 ft | ||||
| BOS Boston, MA | 79 nm out, 3 nm northeast of the line, tower | no report just now | 19 ft | ||||
| ASH Nashua, NH | 108 nm out, 4 nm northwest of the line, tower | no report just now | 200 ft | ||||
| LEB Lebanon, NH | 177 nm out, 4 nm southeast of the line, tower | no report just now | 603 ft | ||||
| MPV Barre/Montpelier, VT | 207 nm out, 11 nm northeast of the line | no report just now | 1,165 ft | ||||
| BTV Burlington, VT | destination | no report just now | 334 ft |
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 BTV when you get there the forecast at the estimated arrival, 11:51 pm EDT (03:51 UTC)
BTV has no terminal forecast; use the nearest airport that does.
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, 69 nm along the route · drones kept away from a public gathering · starts Saturday 17 October · ZBW
Daylight
Sunset at ACK 6:04 pm EDT (22:04 UTC), at BTV 6:13 pm EDT (22:13 UTC) (civil twilight ends 6:43 pm EDT (22:43 UTC)). At 120 knots the arrival at BTV is before sunrise there (7:03 am EDT (11:03 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
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: Nantucket Memorial, Patrick Leahy Burlington International.