Plan a flight · Mon 2:51 am EDT (06:51 UTC)

Patrick Leahy Burlington International to Denver International BTV → DEN

1,421 nautical miles (1,635 statute miles) west on a straight line, true course 270°, about 285° magnetic at the departure end (variation 15W). At 120 knots that is 13 h 24 min at the quickest height in today's winds (10,500 ft, a 14-knot headwind), arriving about 2:15 pm MDT (20:15 UTC). Right now BTV is marginal VFR, wind calm; DEN is VFR, wind from the southwest (220°) at 21 knots, gusting to 29. 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: 432 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 517 nm of the route.
AIRMET ZULU 1C: moderate icing up to 22,000 ft. Over the first 60 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the first 99 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 79 nm of the route.
AIRMET TANGO 3W: 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 route from 705 to 1331 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the last 119 nm of the route.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the last 70 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

A20N at 25,000 ft, 45 nm west, 2:19 am EDT (06:19 UTC): light chop turbulence up to 26,000 ft, remarks: during the climb ZDVWC-06. At the destination end, 45 nm west of the line.
as filed, and in English
```
DEN UA /OV DEN250045/TM 0619/FL250/TP A20N/TB OCNL LGT CHOP BLO 260/RM DURC. ZDVWC-06
```
Report
a routine report filed through DEN
Where
45 nm west (250°) of DEN
Time
06:19 UTC
Height
at 25,000 ft
Aircraft
A20N
Turbulence
occasional light chop below 26,000 ft
Remarks
during the climb ZDVWC-06
B738 descending, 3 nm south, 2:15 am EDT (06:15 UTC): light chop turbulence. At the destination end, 3 nm south of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0615/FLDURD/TP B738/TB LGT CHOP
```
Report
a routine report filed through DEN
Where
over DEN
Time
06:15 UTC
Height
during the descent
Aircraft
B738
Turbulence
light chop

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 12 forecast points nearest it (ALB, SYR, BUF, TVC, MKG, GRB, DBQ, MCW, OMA, GRI, GLD, DEN). 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	250° at 22 kt	+23 kt	21 °C	97 kt	14 h 39 min	3:30 pm MDT (21:30 UTC)
6,500 ft	260° at 18 kt	+19 kt	14 °C	101 kt	14 h 04 min	2:55 pm MDT (20:55 UTC)
8,500 ft	260° at 14 kt	+15 kt	10 °C	105 kt	13 h 32 min	2:23 pm MDT (20:23 UTC)
10,500 ft	260° at 13 kt	+14 kt	7 °C	106 kt	13 h 24 min	2:15 pm MDT (20:15 UTC)
12,500 ft	260° at 14 kt	+15 kt	3 °C	105 kt	13 h 32 min	2:23 pm MDT (20:23 UTC)
14,500 ft	260° at 17 kt	+18 kt	-1 °C	102 kt	13 h 56 min	2:47 pm MDT (20:47 UTC)
16,500 ft	260° at 19 kt	+20 kt	-6 °C	100 kt	14 h 13 min	3:04 pm MDT (21:04 UTC)
18,000 ft FL180	270° at 21 kt	+22 kt	-9 °C	98 kt	14 h 30 min	3:21 pm MDT (21:21 UTC)
24,000 ft FL240	260° at 27 kt	+28 kt	-21 °C	92 kt	15 h 27 min	4:18 pm MDT (22:18 UTC)
30,000 ft FL300	270° at 37 kt	+37 kt	-35 °C	83 kt	17 h 07 min	5:58 pm MDT (23:58 UTC)
34,000 ft FL340	270° at 44 kt	+44 kt	-42 °C	76 kt	18 h 42 min	7:33 pm MDT (01:33 UTC)
39,000 ft FL390	270° at 55 kt	+53 kt	-50 °C	67 kt	21 h 13 min	10:04 pm MDT (04:04 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; 103 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°
SYR	used from 50 nm out; 96 nm from the line	280/13	350/18 10°	340/10 6°	300/15 1°	280/17 -12°	270/16 -23°	280/25 -38°	250/40 -42°	240/53 -50°
BUF	used from 199 nm out; 86 nm from the line	320/10	010/16 10°	360/10 6°	340/13 2°	330/22 -11°	300/25 -23°	320/31 -38°	300/29 -44°	280/36 -50°
TVC	used from 397 nm out; 120 nm from the line	260/31	280/22 15°	290/18 10°	270/13 2°	290/25 -10°	300/35 -21°	310/52 -37°	320/59 -47°	300/84 -54°
MKG	used from 546 nm out; 31 nm from the line	260/22	290/16 15°	300/11 10°	290/5 3°	300/26 -9°	300/32 -20°	320/48 -36°	320/61 -45°	310/74 -53°
GRB	used from 646 nm out; 69 nm from the line	250/36	270/23 16°	270/14 9°	240/18 4°	280/26 -9°	280/29 -20°	290/42 -36°	290/51 -45°	290/72 -55°
DBQ	used from 695 nm out; 66 nm from the line	230/33	250/30 16°	280/15 9°	260/15 5°	260/21 -7°	260/24 -20°	250/37 -33°	270/42 -43°	280/63 -52°
MCW	used from 844 nm out; 32 nm from the line	220/44	250/30 17°	230/14 12°	240/17 6°	250/22 -8°	270/29 -20°	250/34 -34°	260/52 -43°	260/59 -51°
OMA	used from 944 nm out; 65 nm from the line	220/47	240/33 19°	250/18 11°	230/17 6°	260/29 -8°	250/33 -19°	250/51 -33°	260/61 -40°	270/62 -49°
GRI	used from 1043 nm out; 66 nm from the line		230/35 21°	230/23 13°	220/20 7°	240/25 -8°	240/37 -20°	250/49 -33°	260/57 -38°	260/58 -47°
GLD	used from 1242 nm out; 84 nm from the line		230/49	230/42 15°	220/26 8°	240/18 -7°	230/27 -21°	240/62 -30°	240/61 -35°	250/57 -47°
DEN	used from 1341 nm out; 55 nm from the line			240/21 14°	250/44 6°	220/49 -8°	220/49 -21°	230/54 -30°	240/57 -35°	240/49 -45°

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	marginal VFR Sky: a few clouds at 400 feet, overcast at 2,900 feet Weather: light rain	calm	10+ mi	2,900 ft	334 ft	2:26 am EDT (06:26 UTC)
SLK Saranac Lake, NY	50 nm out, 7 nm southeast of the line	marginal VFR Sky: scattered clouds at 200 feet, overcast at 1,800 feet	calm	10+ mi	1,800 ft	1,662 ft	06:20 UTC
CYPQ Peterborough,	228 nm out, 8 nm southeast of the line	low IFR Sky: overcast at 300 feet Weather: mist	calm	5 mi	300 ft	628 ft	06:35 UTC
CYOS Owen Sound,	328 nm out, 23 nm north of the line	no report just now				1,007 ft
MBS Saginaw, MI	477 nm out, 24 nm south of the line, tower	VFR	from the southwest (220°) at 8 knots	8 mi	none	668 ft	05:53 UTC
MSN Madison, WI	705 nm out, 8 nm south of the line, tower	VFR	from the south-southwest (200°) at 9 knots	10+ mi	none	886 ft	05:53 UTC
ALO Waterloo, IA	844 nm out, 13 nm south of the line, tower	VFR	from the south (180°) at 8 knots	10+ mi	none	873 ft	05:54 UTC
MEY Mapleton, IA	993 nm out, 3 nm northwest of the line	no report just now				1,116 ft
SUX Sioux City, IA	1013 nm out, 23 nm northwest of the line, tower	VFR	from the southwest (220°) at 4 knots	9 mi	none	1,098 ft	05:52 UTC
LBF North Platte, NE	1222 nm out, 8 nm northwest of the line	VFR	from the east (080°) at 5 knots	10+ mi	none	2,777 ft	05:53 UTC
HEQ Holyoke, CO	1301 nm out, 1 nm west of the line	VFR	from the south (190°) at 7 knots	10+ mi	none	3,729 ft	06:35 UTC
DEN Denver, CO	destination	VFR Sky: a few clouds at 6,000 feet, scattered clouds at 22,000 feet	from the southwest (220°) at 21 knots, gusting to 29	10+ mi	none	5,433 ft	11:53 pm MDT (05:53 UTC)

The highest airport on this list sits at 5,433 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At DEN when you get there the forecast at the estimated arrival, 2:15 pm MDT (20:15 UTC)

Wind from the southwest at 14 knots, gusting to 21, visibility more than 6 miles, clear skies VFR

The whole forecast for DEN

From Mon 12:00 am MDT (06:00 UTC): wind from the south-southwest at 15 knots, gusting to 25, visibility more than 6 miles, a few clouds at 14,000 feet
From Mon 3:00 am MDT (09:00 UTC): wind from the south at 11 knots, visibility more than 6 miles, a few clouds at 22,000 feet
From Mon 10:00 am MDT (16:00 UTC): wind from the southwest at 14 knots, gusting to 21, visibility more than 6 miles, clear skies
From Mon 4:00 pm MDT (22:00 UTC): wind from the south at 9 knots, visibility more than 6 miles, clear skies
From Mon 7:00 pm MDT (01:00 UTC): wind from the northeast at 8 knots, visibility more than 6 miles, a few clouds at 15,000 feet
From Mon 11:00 pm MDT (05:00 UTC): wind from the north at 10 knots, visibility more than 6 miles, a few clouds at 3,000 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

No temporary flight restriction on or near this route right now.

Daylight

Sunset at BTV 6:13 pm EDT (22:13 UTC), at DEN 6:22 pm MDT (00:22 UTC) (civil twilight ends 6:49 pm MDT (00:49 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 now, the central Great Lakes · loop National Weather Service

Radar now, the upper Mississippi valley · 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, Denver International.