Patrick Leahy Burlington International to Martin State Airport BTV → MTN
342 nautical miles (393 statute miles) southwest on a straight line, true course 206°, about 221° magnetic at the departure end (variation 15W). At 120 knots that is 2 h 52 min at the quickest height in today's winds (6,500 ft, a 1-knot headwind), arriving about 6:00 am EDT (10:00 UTC), after sunset at the destination. Right now BTV is low IFR, wind calm; MTN is 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
- 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 117 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the whole route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 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 BTV.
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. 283 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
- GA6C descending, 37 nm east, 12:32 am EDT (04:32 UTC): overcast above 1,000 ft, remarks: bases OVC010. 185 nm along the route, 37 nm east of the line.
as filed, and in English
SWF UA /OV SWF 270005/TM 0432/FLDURD/TP GA6C/SK OVC010/RM BASES OVC010
- Report
- a routine report filed through SWF
- Where
- 5 nm west (270°) of SWF
- Time
- 04:32 UTC
- Height
- during the descent
- Aircraft
- GA6C
- Sky
- overcast from 1,000 ft
- Remarks
- bases OVC010
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 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 (ALB, AVP, ACY). 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 | 240° at 2 kt | +2 kt | 118 kt | 2 h 54 min | 6:02 am EDT (10:02 UTC) | |
| 6,500 ft | 290° at 7 kt | +1 kt | 10 °C | 119 kt | 2 h 52 min | 6:00 am EDT (10:00 UTC) |
| 8,500 ft | 250° at 11 kt | +7 kt | 8 °C | 113 kt | 3 h 02 min | 6:10 am EDT (10:10 UTC) |
| 10,500 ft | 250° at 13 kt | +10 kt | 5 °C | 110 kt | 3 h 07 min | 6:15 am EDT (10:15 UTC) |
| 12,500 ft | 250° at 16 kt | +12 kt | 2 °C | 108 kt | 3 h 10 min | 6:18 am EDT (10:18 UTC) |
| 14,500 ft | 250° at 21 kt | +15 kt | -3 °C | 105 kt | 3 h 15 min | 6:23 am EDT (10:23 UTC) |
| 16,500 ft | 250° at 26 kt | +18 kt | -7 °C | 102 kt | 3 h 21 min | 6:29 am EDT (10:29 UTC) |
| 18,000 ft FL180 | 250° at 29 kt | +20 kt | -10 °C | 100 kt | 3 h 25 min | 6:33 am EDT (10:33 UTC) |
| 24,000 ft FL240 | 240° at 38 kt | +30 kt | -22 °C | 90 kt | 3 h 48 min | 6:56 am EDT (10:56 UTC) |
| 30,000 ft FL300 | 240° at 60 kt | +52 kt | -34 °C | 68 kt | 5 h 02 min | 8:10 am EDT (12:10 UTC) |
| 34,000 ft FL340 | 230° at 71 kt | +62 kt | -41 °C | 58 kt | 5 h 54 min | 9:02 am EDT (13:02 UTC) |
| 39,000 ft FL390 | 240° at 63 kt | +53 kt | -50 °C | 67 kt | 5 h 06 min | 8:14 am EDT (12:14 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| ALB | used from 0 nm out; 83 nm from the line | 120/9 | 270/8 10° | L/V 5° | 260/9 1° | 260/34 -10° | 250/42 -22° | 240/57 -35° | 240/70 -42° | 240/65 -50° |
| AVP | used from 146 nm out; 52 nm from the line | 150/5 | 350/13 12° | 270/20 8° | 260/17 4° | 260/25 -11° | 240/31 -22° | 240/54 -35° | 230/61 -41° | 240/55 -49° |
| ACY | used from 293 nm out; 76 nm from the line | 220/19 | 220/18 14° | 210/36 9° | 210/35 5° | 220/36 -8° | 240/49 -21° | 220/90 -31° | 230/103 -40° | 230/81 -50° |
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 | low IFR Sky: a broken layer at 300 feet, overcast at 2,900 feet Weather: light rain | calm | 10+ mi | 300 ft | 334 ft | 2:54 am EDT (06:54 UTC) |
| GFL Glens Falls, NY | 68 nm out, 12 nm southeast of the line | low IFR Sky: a broken layer at 400 feet, overcast at 4,800 feet | calm | 10+ mi | 400 ft | 328 ft | 06:53 UTC |
| SCH Schenectady, NY | 98 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 |
| MSV Monticello, NY | 185 nm out, 9 nm east of the line | low IFR Sky: overcast at 400 feet | calm | 10+ mi | 400 ft | 1,403 ft | 06:56 UTC |
| ABE Allentown, PA | 254 nm out, 8 nm east of the line, tower | marginal VFR Sky: overcast at 1,300 feet | from the northeast (050°) at 8 knots | 10+ mi | 1,300 ft | 393 ft | 06:51 UTC |
| RDG Reading, PA | 273 nm out, 8 nm west of the line, tower | marginal VFR Sky: overcast at 1,100 feet | from the north-northeast (020°) at 6 knots | 10+ mi | 1,100 ft | 343 ft | 06:54 UTC |
| EVY Middletown, DE | 322 nm out, 25 nm east of the line | no report just now | 69 ft | ||||
| MTN Baltimore, MD | destination | IFR Sky: overcast at 900 feet Weather: rain | calm | 5 mi | 900 ft | 22 ft | 2:55 am EDT (06:55 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 MTN when you get there the forecast at the estimated arrival, 6:00 am EDT (10:00 UTC)
Wind from the north-northwest at 5 knots, visibility 6 miles, light rain, overcast at 700 feet IFR
The whole forecast for MTN
- 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
The forecast for BTV, the departure
- From Mon 2:00 am EDT (06:00 UTC): wind from the south at 5 knots, visibility 6 miles, light rain, mist, overcast at 3,500 feet
- From Mon 5:00 am EDT (09:00 UTC): wind calm, visibility 6 miles, mist, overcast at 1,400 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
Temporary flight restrictions on the line or within 25 nm of it
- 4/9383 WASHINGTON, DC., USA 10 nm from the route, at the destination end · security · ZDC
- 6/8800 Baltimore, MD, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 9 nm from the route, at the destination end · drones kept away from a public gathering · starts Saturday 17 October · ZDC
Daylight
Sunset at BTV 6:13 pm EDT (22:13 UTC), at MTN 6:31 pm EDT (22:31 UTC) (civil twilight ends 6:58 pm EDT (22:58 UTC)). At 120 knots the arrival at MTN is before sunrise there (7:12 am EDT (11:12 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: Patrick Leahy Burlington International, Martin State Airport.