Martin State Airport to Patrick Leahy Burlington International MTN → BTV
342 nautical miles (393 statute miles) northeast on a straight line, true course 024°, about 035° magnetic at the departure end (variation 11W). At 120 knots that is 2 h 33 min at the quickest height in today's winds (39,000 ft, a 14-knot tailwind), arriving about 7:39 am EDT (11:39 UTC). Right now MTN is marginal VFR, wind from the north (350°) at 4 knots; BTV is low IFR, wind calm. 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
- SIGMET E31E: thunderstorms (a convective SIGMET) up to 30,000 ft, until 6:55 am EDT (10:55 UTC). Near the route, at the departure end.
as issued
WSUS31 KKCI 120855 MKCE WST 120855 CONVECTIVE SIGMET 31E VALID UNTIL 1055Z MD VA DC FROM 20NNE DCA-30WSW SBY-RIC-CSN-20NNE DCA AREA TS MOV LTL. 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, fog). Over the whole route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 24,000 ft to 33,000 ft. Over the whole route.
- AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 6,000 ft. Near the route, 29 nm along the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, mist). Over the last 215 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 MTN.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- C560 at 13,000 ft, 16 nm southeast, 2:38 am EDT (06:38 UTC): moderate turbulence, overcast above 19,000 ft, heavy rain, remarks: during the descent. 59 nm along the route, 16 nm southeast of the line.
as filed, and in English
PHL UA /OV 20 NW PHL/TM 0638/FL130 /TP C560/SK OVC190/WX +RA/TB MOD/RM DURD
- Report
- a routine report filed through PHL
- Where
- 20 northwest phl
- Time
- 06:38 UTC
- Height
- at 13,000 ft
- Aircraft
- C560
- Sky
- overcast from 19,000 ft
- Weather
- heavy rain
- Turbulence
- moderate
- Remarks
- during the descent
- B737 at 800 ft, 15 nm southwest, 3:30 am EDT (07:30 UTC): remarks: bases 800 ft. At the departure end, 15 nm southwest of the line.
as filed, and in English
BWI UA /OV BWI/TM 0730/FL008/TP B737/RM BASES 008
- Report
- a routine report filed through BWI
- Where
- over BWI
- Time
- 07:30 UTC
- Height
- at 800 ft
- Aircraft
- B737
- Remarks
- bases 800 ft
- K35R at 400 ft, 45 nm southeast, 3:45 am EDT (07:45 UTC): overcast above 40,000 ft. At the departure end, 45 nm southeast of the line.
as filed, and in English
DOV UA /OV KDOV /TM 0745 /FL 004 /TP K35R /SK OVC004-TOPUNKN
- Report
- a routine report filed through DOV
- Where
- over KDOV
- Time
- 07:45 UTC
- Height
- at 400 ft
- Aircraft
- K35R
- Sky
- overcast from 400 ft, tops unknown
Winds aloft along the route, and the time en route the forecast for use 08:00–15:00 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 (ACY, AVP, ALB). 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 | 350° at 19 kt | +16 kt | 104 kt | 3 h 17 min | 8:23 am EDT (12:23 UTC) | |
| 5,500 ft | 360° at 19 kt | +17 kt | 103 kt | 3 h 19 min | 8:25 am EDT (12:25 UTC) | |
| 7,500 ft | 350° at 17 kt | +14 kt | 9 °C | 106 kt | 3 h 14 min | 8:20 am EDT (12:20 UTC) |
| 9,500 ft | 340° at 16 kt | +12 kt | 6 °C | 108 kt | 3 h 10 min | 8:16 am EDT (12:16 UTC) |
| 11,500 ft | 340° at 18 kt | +13 kt | 3 °C | 107 kt | 3 h 12 min | 8:18 am EDT (12:18 UTC) |
| 13,500 ft | 340° at 18 kt | +12 kt | -1 °C | 108 kt | 3 h 10 min | 8:16 am EDT (12:16 UTC) |
| 15,500 ft | 330° at 19 kt | +10 kt | -6 °C | 110 kt | 3 h 07 min | 8:13 am EDT (12:13 UTC) |
| 17,500 ft | 320° at 19 kt | +9 kt | -10 °C | 111 kt | 3 h 05 min | 8:11 am EDT (12:11 UTC) |
| 18,000 ft FL180 | 320° at 19 kt | +8 kt | -11 °C | 112 kt | 3 h 03 min | 8:09 am EDT (12:09 UTC) |
| 24,000 ft FL240 | 320° at 20 kt | +8 kt | -23 °C | 112 kt | 3 h 03 min | 8:09 am EDT (12:09 UTC) |
| 30,000 ft FL300 | 310° at 23 kt | +5 kt | -37 °C | 115 kt | 2 h 58 min | 8:04 am EDT (12:04 UTC) |
| 34,000 ft FL340 | 280° at 27 kt | −6 kt | -43 °C | 126 kt | 2 h 43 min | 7:49 am EDT (11:49 UTC) |
| 39,000 ft FL390 | 270° at 35 kt | −14 kt | -50 °C | 134 kt | 2 h 33 min | 7:39 am EDT (11:39 UTC) |
Based on data from the 12th at 06:00 UTC; valid on the 12th at 12:00 UTC for use 08:00 to 15:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| ACY | used from 0 nm out; 76 nm from the line | 350/12 | 340/12 11° | 340/12 6° | 340/13 2° | 270/10 -10° | 240/17 -23° | 230/46 -33° | 230/46 -40° | 240/46 -49° |
| AVP | used from 49 nm out; 54 nm from the line | 010/20 | 020/24 11° | 360/19 8° | 350/23 2° | 320/24 -11° | 330/25 -22° | 330/27 -37° | 310/28 -42° | 290/30 -50° |
| ALB | used from 195 nm out; 26 nm from the line | 340/22 | 340/19 9° | 320/16 7° | 330/16 2° | 330/19 -11° | 320/21 -23° | 320/25 -39° | 280/30 -44° | 270/41 -51° |
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 |
|---|---|---|---|---|---|---|---|
| MTN Baltimore, MD | departure | marginal VFR Sky: overcast at 1,100 feet Weather: light rain | from the north (350°) at 4 knots | 10+ mi | 1,100 ft | 22 ft | 4:55 am EDT (08:55 UTC) |
| EVY Middletown, DE | 20 nm out, 25 nm east of the line | no report just now | 69 ft | ||||
| RDG Reading, PA | 68 nm out, 8 nm west of the line, tower | marginal VFR Sky: overcast at 1,600 feet | from the north (360°) at 5 knots | 10+ mi | 1,600 ft | 343 ft | 08:54 UTC |
| ABE Allentown, PA | 88 nm out, 8 nm east of the line, tower | marginal VFR Sky: overcast at 1,100 feet | from the north (350°) at 5 knots | 10+ mi | 1,100 ft | 393 ft | 08:51 UTC |
| MSV Monticello, NY | 156 nm out, 9 nm east of the line | low IFR Sky: overcast at 400 feet | from the northwest (310°) at 3 knots | 10+ mi | 400 ft | 1,403 ft | 08:56 UTC |
| SCH Schenectady, NY | 244 nm out, 13 nm southeast of the line, tower | marginal VFR Sky: a broken layer at 1,100 feet, overcast at 2,000 feet Weather: rain | from the northeast (040°) at 4 knots | 7 mi | 1,100 ft | 377 ft | 00:51 UTC |
| GFL Glens Falls, NY | 273 nm out, 12 nm southeast of the line | marginal VFR Sky: a few clouds at 100 feet, overcast at 4,000 feet Weather: mist | calm | 3 mi | 4,000 ft | 328 ft | 09:00 UTC |
| BTV Burlington, VT | destination | low IFR Sky: overcast at 300 feet Weather: light rain, mist | calm | 3 mi | 300 ft | 334 ft | 4:54 am EDT (08:54 UTC) |
The highest airport on this list sits at 1,403 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, 7:39 am EDT (11:39 UTC)
Wind calm, visibility 6 miles, mist, overcast at 1,400 feet marginal VFR
At times between Mon 5:00 am EDT (09:00 UTC) and 9:00 am EDT (13:00 UTC): visibility 3 miles, light rain, mist, overcast at 300 feet low IFR
The whole forecast for BTV
- From Mon 5:00 am EDT (09:00 UTC): wind calm, visibility 6 miles, mist, overcast at 1,400 feet
- At times between Mon 5:00 am EDT (09:00 UTC) and 9:00 am EDT (13:00 UTC): visibility 3 miles, light rain, mist, overcast at 300 feet
- From Mon 9:00 am EDT (13:00 UTC): wind calm, visibility more than 6 miles, a broken layer at 2,100 feet
- From Mon 1:00 pm EDT (17:00 UTC): wind light and variable, visibility more than 6 miles, a broken layer at 5,000 feet
- From Mon 5:00 pm EDT (21:00 UTC): wind from the north at 6 knots, visibility 6 miles, mist, overcast at 1,900 feet
The forecast for MTN, the departure
- From Mon 2:00 am EDT (06:00 UTC): wind from the north-northwest at 5 knots, visibility 6 miles, light rain, overcast at 700 feet
- From Mon 10:00 am EDT (14:00 UTC): wind from the northwest at 10 knots, gusting to 19, visibility more than 6 miles, overcast at 1,200 feet
- From Mon 2:00 pm EDT (18:00 UTC): wind from the west-northwest at 10 knots, gusting to 18, visibility more than 6 miles, scattered clouds at 1,500 feet, overcast at 2,500 feet
- From Mon 5:00 pm EDT (21:00 UTC): wind from the west-northwest at 7 knots, visibility more than 6 miles, scattered clouds at 2,500 feet, a broken layer at 3,500 feet
- From Mon 8:00 pm EDT (00:00 UTC): wind from the west at 5 knots, visibility more than 6 miles, scattered clouds at 4,000 feet
Temporary flight restrictions on the line or within 25 nm of it
- 4/9383 WASHINGTON, DC., USA 10 nm from the route, at the departure end · security · ZDC
- 6/8800 Baltimore, MD, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 9 nm from the route, at the departure end · drones kept away from a public gathering · starts Saturday 17 October · ZDC
Daylight
Sunset at MTN 6:31 pm EDT (22:31 UTC), at BTV 6:13 pm EDT (22:13 UTC) (civil twilight ends 6:43 pm EDT (22:43 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: Martin State Airport, Patrick Leahy Burlington International.