Portland International Jetport to Cyril E King Airport PWM → STT
1,543 nautical miles (1,776 statute miles) south on a straight line, true course 168°, about 183° magnetic at the departure end (variation 15W). At 120 knots that is 14 h 25 min at the quickest height in today's winds (12,500 ft, a 13-knot headwind), arriving about 12:25 pm AST (16:25 UTC). Right now PWM is marginal VFR, wind calm; STT is VFR, wind from the east (090°) at 7 knots. 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: 1 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 ZULU 1C: moderate icing up to 22,000 ft. Over the first 110 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the first 110 nm of the route.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 13,000 ft. Over the first 149 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Near the route, at the departure end.
- 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 route from 10 to 309 nm out.
- AIRMET TANGO 6W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 229 to 329 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 PWM.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- A333 at 15,000 ft, 29 nm west, 9:37 pm EDT (01:37 UTC): moderate chop turbulence up to 15,000 ft, remarks: during the climb. At the departure end, 29 nm west 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
- BCS3 at 13,000 ft, 45 nm west, 7:03 pm EDT (23:03 UTC): moderate turbulence from 13,000 ft to 16,000 ft, heavy rain, remarks: during the climb. 70 nm along the route, 45 nm west of the line.
as filed, and in English
BOS UA /OV BOS18005/TM 2303/FL130/TP BCS3/WX +RA/TB MOD 130-160/RM DURC
- Report
- a routine report filed through BOS
- Where
- BOS18005
- Time
- 23:03 UTC
- Height
- at 13,000 ft
- Aircraft
- BCS3
- Weather
- heavy rain
- Turbulence
- moderate from 13,000 ft to 16,000 ft
- Remarks
- during the climb
- A321 at 5,000 ft, 34 nm west, 8:46 pm EDT (00:46 UTC): moderate turbulence from 5,000 ft to 15,000 ft. 90 nm along the route, 34 nm west 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 600 ft, 45 nm west, 9:20 pm EDT (01:20 UTC): a broken layer above 600 ft, remarks: during the descent runway 22L bos. 70 nm along the route, 45 nm west 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 , 46 nm west, 8:56 pm EDT (00:56 UTC): remarks: braking action fair during landing runway 22L bos. 70 nm along the route, 46 nm west 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
- BCS3 at 700 ft, 44 nm west, 7:56 pm EDT (23:56 UTC): a broken layer above 700 ft, remarks: during the descent runway 22L bos. 70 nm along the route, 44 nm west of the line.
as filed, and in English
BOS UA /OV KBOS040003/TM 2356/FL007/TP BCS3/SK BKN007/RM DURD RY 22L BOS
- Report
- a routine report filed through BOS
- Where
- 3 nm northeast (040°) of KBOS
- Time
- 23:56 UTC
- Height
- at 700 ft
- Aircraft
- BCS3
- Sky
- a broken layer from 700 ft
- Remarks
- during the descent runway 22L bos
- B738 at 18,000 ft, 45 nm west, 7:47 pm EDT (23:47 UTC): light chop turbulence, remarks: better at at 19,000 ft. 80 nm along the route, 45 nm west 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
- BC3 at 20,000 ft, 40 nm west, 7:51 pm EDT (23:51 UTC): light chop turbulence, remarks: during the climb from 14,000 ft to 20,000 ft ssoxs sid. 100 nm along the route, 40 nm west 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
- BE40 at 16,000 ft, 31 nm west, 7:02 pm EDT (23:02 UTC): light to moderate chop turbulence. 129 nm along the route, 31 nm west of the line.
as filed, and in English
MVY UA /OV MVY090010/TM 2302/FL160/TP BE40/TB LGT OCNL MOD CHOP
- Report
- a routine report filed through MVY
- Where
- 10 nm east (090°) of MVY
- Time
- 23:02 UTC
- Height
- at 16,000 ft
- Aircraft
- BE40
- Turbulence
- light occasional moderate chop
- B764 at 35,000 ft, 27 nm west, 7:18 pm EDT (23:18 UTC): light to moderate turbulence. 179 nm along the route, 27 nm west 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
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 6 forecast points nearest it (PWM, BOS, ACK, ORF, ILM, MIA). 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 | 190° at 19 kt | +18 kt | 102 kt | 15 h 08 min | 1:08 pm AST (17:08 UTC) | |
| 6,500 ft | 200° at 21 kt | +18 kt | 13 °C | 102 kt | 15 h 08 min | 1:08 pm AST (17:08 UTC) |
| 8,500 ft | 210° at 23 kt | +17 kt | 12 °C | 103 kt | 14 h 59 min | 12:59 pm AST (16:59 UTC) |
| 10,500 ft | 220° at 26 kt | +15 kt | 9 °C | 105 kt | 14 h 42 min | 12:42 pm AST (16:42 UTC) |
| 12,500 ft | 230° at 28 kt | +13 kt | 5 °C | 107 kt | 14 h 25 min | 12:25 pm AST (16:25 UTC) |
| 14,500 ft | 230° at 30 kt | +13 kt | 1 °C | 107 kt | 14 h 25 min | 12:25 pm AST (16:25 UTC) |
| 16,500 ft | 240° at 33 kt | +13 kt | -3 °C | 107 kt | 14 h 25 min | 12:25 pm AST (16:25 UTC) |
| 18,000 ft FL180 | 240° at 35 kt | +13 kt | -6 °C | 107 kt | 14 h 25 min | 12:25 pm AST (16:25 UTC) |
| 24,000 ft FL240 | 240° at 37 kt | +15 kt | -16 °C | 105 kt | 14 h 42 min | 12:42 pm AST (16:42 UTC) |
| 30,000 ft FL300 | 230° at 44 kt | +24 kt | -31 °C | 96 kt | 16 h 04 min | 2:04 pm AST (18:04 UTC) |
| 34,000 ft FL340 | 230° at 49 kt | +27 kt | -41 °C | 93 kt | 16 h 35 min | 2:35 pm AST (18:35 UTC) |
| 39,000 ft FL390 | 230° at 51 kt | +26 kt | -53 °C | 94 kt | 16 h 25 min | 2:25 pm AST (18:25 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| PWM | used from 0 nm out; 25 nm from the line | 200/23 | 190/21 5° | 260/23 5° | 270/20 0° | 250/29 -9° | 250/54 -19° | 250/71 -33° | 250/78 -43° | 250/105 -56° |
| BOS | used from 50 nm out; 46 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° |
| ACK | used from 100 nm out; 26 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° |
| ORF | used from 597 nm out; 461 nm from the line | 210/45 | 210/41 15° | 210/39 13° | 220/37 7° | 230/55 -5° | 230/65 -16° | 220/71 -30° | 220/75 -40° | 220/72 -53° |
| ILM | used from 797 nm out; 599 nm from the line | 230/27 | 220/35 14° | 230/45 13° | 230/48 8° | 240/59 -4° | 230/57 -14° | 220/66 -30° | 210/66 -40° | 210/59 -52° |
| MIA | used from 1045 nm out; 753 nm from the line | 190/8 | L/V 18° | 180/5 14° | L/V 9° | 190/10 -5° | 160/10 -16° | 150/13 -30° | 160/26 -40° | 150/23 -52° |
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 |
|---|---|---|---|---|---|---|---|
| PWM Portland, ME | departure | marginal VFR Sky: scattered clouds at 2,100 feet, scattered clouds at 7,000 feet, overcast at 10,000 feet Weather: light rain, mist | calm | 5 mi | 10,000 ft | 75 ft | 9:51 pm EDT (01:51 UTC) |
| ACK Nantucket, MA | 139 nm out, 19 nm west of the line, tower | marginal VFR Sky: a broken layer at 2,600 feet, overcast at 3,500 feet Weather: light rain | from the east (100°) at 15 knots | 9 mi | 2,600 ft | 46 ft | 01:53 UTC |
| STT Charlotte Amalie, VI | destination | VFR | from the east (090°) at 7 knots | 10+ mi | none | 23 ft | 9:53 pm AST (01:53 UTC) |
The highest airport on this list sits at 75 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At STT when you get there the forecast at the estimated arrival, 12:25 pm AST (16:25 UTC)
Wind from the east-southeast at 10 knots, visibility more than 6 miles, showers nearby, scattered clouds at 3,500 feet VFR
The whole forecast for STT
- From Sun 8:00 pm AST (00:00 UTC): wind from the east-northeast at 6 knots, visibility more than 6 miles, showers nearby, scattered clouds at 2,500 feet, a broken layer at 5,000 feet
- From Mon 9:00 am AST (13:00 UTC): wind from the east-southeast at 10 knots, visibility more than 6 miles, showers nearby, scattered clouds at 3,500 feet
- From Mon 7:00 pm AST (23:00 UTC): wind from the east at 7 knots, visibility more than 6 miles, showers nearby, scattered clouds at 2,500 feet, scattered clouds at 5,000 feet
The forecast for PWM, the departure
- From Sun 8:00 pm EDT (00:00 UTC): wind from the south-southwest at 5 knots, visibility more than 6 miles, a broken layer at 12,000 feet
- From Sun 10:00 pm EDT (02:00 UTC): wind light and variable, visibility more than 6 miles, light rain, overcast at 3,000 feet
- From Mon 2:00 am EDT (06:00 UTC): wind calm, visibility 4 miles, light rain, overcast at 600 feet
- From Mon 9:00 am EDT (13:00 UTC): wind from the west-northwest at 6 knots, visibility more than 6 miles, a broken layer at 2,500 feet, overcast at 6,000 feet
- From Mon 12:00 pm EDT (16:00 UTC): wind from the northwest at 6 knots, visibility more than 6 miles, a broken layer at 5,000 feet
Temporary flight restrictions on the line or within 25 nm of it
- 6/2698 VIEQUES, PR, Monday, January 19, 2026 through Friday, December 18, 2026 UTC 20 nm from the route, at the destination end · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 18 December · ZSU
Daylight
Sunset at PWM 6:03 pm EDT (22:03 UTC), at STT 5:59 pm AST (21:59 UTC) (civil twilight ends 6:21 pm AST (22:21 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: Portland International Jetport, Cyril E King Airport.