Plan a flight · Mon 1:44 am MDT (07:44 UTC)

Denver International to Patrick Leahy Burlington International DEN → BTV

1,421 nautical miles (1,635 statute miles) east on a straight line, true course 068°, about 060° magnetic at the departure end (variation 8E). At 120 knots that is 8 h 10 min at the quickest height in today's winds (39,000 ft, a 54-knot tailwind), arriving about 11:54 am EDT (15:54 UTC). Right now DEN is VFR, wind from the south-southwest (210°) at 24 knots, gusting to 32; BTV is marginal VFR, 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: 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 TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft, from 12:00 am MDT (06:00 UTC). Over the first 119 nm of the route.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft, from 12:00 am MDT (06:00 UTC). Over the first 70 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), from 12:00 am MDT (06:00 UTC). Over the route from 89 to 715 nm out.
AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist), from 12:00 am MDT (06:00 UTC). Over the last 517 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft, from 12:00 am MDT (06:00 UTC). Over the last 99 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist), from 12:00 am MDT (06:00 UTC). Over the last 79 nm of the route.
AIRMET ZULU 1C: moderate icing up to 22,000 ft, from 12:00 am MDT (06:00 UTC). Over the last 60 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 DEN.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

B737 at 18,000 ft, 47 nm northwest, 1:24 am MDT (07:24 UTC): moderate turbulence, remarks: FL180-130. At the departure end, 47 nm northwest of the line.
as filed, and in English
```
DEN UA /OV DEN330050/TM 0724/FL180/TP B737/TB MOD/RM FL180-130
```
Report
a routine report filed through DEN
Where
50 nm northwest (330°) of DEN
Time
07:24 UTC
Height
at 18,000 ft
Aircraft
B737
Turbulence
moderate
Remarks
FL180-130
B737 descending, 3 nm south, 1:10 am MDT (07:10 UTC): remarks: smooth. At the departure end, 3 nm south of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0710/FLDURD/TP B737/RM SMOOTH
```
Report
a routine report filed through DEN
Where
over DEN
Time
07:10 UTC
Height
during the descent
Aircraft
B737
Remarks
smooth
A20N at 25,000 ft, 45 nm west, 12:19 am MDT (06:19 UTC): light chop turbulence up to 26,000 ft, remarks: during the climb ZDVWC-06. At the departure 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, 12:15 am MDT (06:15 UTC): light chop turbulence. At the departure 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
A359 at 37,000 ft, 29 nm south, 12:18 am MDT (06:18 UTC): light to moderate chop turbulence. 1291 nm along the route, 29 nm south of the line.
as filed, and in English
```
ART UA /OV ART/TM 0618/FL370/TP A359/TB CONS LGT OCNL MOD CHOP
```
Report
a routine report filed through ART
Where
over ART
Time
06:18 UTC
Height
at 37,000 ft
Aircraft
A359
Turbulence
continuous light occasional moderate 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 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 14 forecast points nearest it (DEN, GLD, GRI, OMA, DSM, MCW, DBQ, GRB, MKG, TVC, BUF, SYR, ALB, 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
3,500 ft	250° at 22 kt	−22 kt		142 kt	10 h	1:44 pm EDT (17:44 UTC)
5,500 ft	250° at 21 kt	−22 kt	21 °C	142 kt	10 h	1:44 pm EDT (17:44 UTC)
7,500 ft	260° at 16 kt	−17 kt	12 °C	137 kt	10 h 22 min	2:06 pm EDT (18:06 UTC)
9,500 ft	260° at 13 kt	−14 kt	9 °C	134 kt	10 h 36 min	2:20 pm EDT (18:20 UTC)
11,500 ft	250° at 14 kt	−15 kt	5 °C	135 kt	10 h 32 min	2:16 pm EDT (18:16 UTC)
13,500 ft	260° at 16 kt	−17 kt	1 °C	137 kt	10 h 22 min	2:06 pm EDT (18:06 UTC)
15,500 ft	260° at 18 kt	−19 kt	-4 °C	139 kt	10 h 13 min	1:57 pm EDT (17:57 UTC)
17,500 ft	270° at 21 kt	−21 kt	-8 °C	141 kt	10 h 05 min	1:49 pm EDT (17:49 UTC)
18,000 ft FL180	270° at 21 kt	−22 kt	-9 °C	142 kt	10 h	1:44 pm EDT (17:44 UTC)
24,000 ft FL240	260° at 28 kt	−28 kt	-21 °C	148 kt	9 h 36 min	1:20 pm EDT (17:20 UTC)
30,000 ft FL300	270° at 37 kt	−38 kt	-35 °C	158 kt	9 h	12:44 pm EDT (16:44 UTC)
34,000 ft FL340	270° at 45 kt	−45 kt	-42 °C	165 kt	8 h 37 min	12:21 pm EDT (16:21 UTC)
39,000 ft FL390	270° at 55 kt	−54 kt	-50 °C	174 kt	8 h 10 min	11:54 am EDT (15:54 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
DEN	used from 0 nm out; 25 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°
GLD	used from 99 nm out; 76 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°
GRI	used from 199 nm out; 81 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°
OMA	used from 348 nm out; 58 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°
DSM	used from 447 nm out; 69 nm from the line	230/40	250/33 17°	250/18 12°	240/17 5°	260/28 -8°	270/34 -19°	260/41 -33°	260/55 -41°	270/62 -51°
MCW	used from 497 nm out; 39 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°
DBQ	used from 596 nm out; 48 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°
GRB	used from 745 nm out; 62 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°
MKG	used from 795 nm out; 43 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°
TVC	used from 894 nm out; 63 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°
BUF	used from 1043 nm out; 136 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°
SYR	used from 1242 nm out; 83 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°
ALB	used from 1341 nm out; 106 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°
BML	used from 1391 nm out; 100 nm from the line	260/22	300/13 8°	280/13 4°	260/13 0°	260/16 -11°	240/45 -21°	240/59 -36°	240/77 -44°	240/83 -53°

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
DEN Denver, CO	departure	VFR Sky: a few clouds at 6,000 feet, a broken layer at 18,000 feet	from the south-southwest (210°) at 24 knots, gusting to 32	10+ mi	18,000 ft	5,433 ft	12:53 am MDT (06:53 UTC)
HEQ Holyoke, CO	119 nm out, 1 nm west of the line	VFR	from the south-southwest (200°) at 7 knots	10+ mi	none	3,729 ft	07:35 UTC
LBF North Platte, NE	199 nm out, 8 nm northwest of the line	VFR	from the east (080°) at 4 knots	10+ mi	none	2,777 ft	06:53 UTC
SUX Sioux City, IA	407 nm out, 23 nm northwest of the line, tower	VFR	calm	10+ mi	none	1,098 ft	06:52 UTC
MEY Mapleton, IA	427 nm out, 3 nm northwest of the line	no report just now				1,116 ft
ALO Waterloo, IA	576 nm out, 13 nm south of the line, tower	VFR	from the south (180°) at 9 knots	10+ mi	none	873 ft	06:54 UTC
MSN Madison, WI	715 nm out, 8 nm south of the line, tower	VFR	from the south-southwest (200°) at 8 knots	10+ mi	none	886 ft	06:53 UTC
MBS Saginaw, MI	944 nm out, 24 nm south of the line, tower	VFR	from the south-southwest (210°) at 7 knots	7 mi	none	668 ft	06:53 UTC
CYOS Owen Sound,	1093 nm out, 23 nm north of the line	no report just now				1,007 ft
CYPQ Peterborough,	1192 nm out, 8 nm southeast of the line	low IFR Sky: overcast at 300 feet Weather: fog	calm	0.38 mi	300 ft	628 ft	07:25 UTC
SLK Saranac Lake, NY	1371 nm out, 7 nm southeast of the line	marginal VFR Sky: scattered clouds at 200 feet, overcast at 1,100 feet Weather: mist	calm	4 mi	1,100 ft	1,662 ft	07:30 UTC
BTV Burlington, VT	destination	marginal VFR Sky: scattered clouds at 400 feet, overcast at 2,800 feet	calm	10+ mi	2,800 ft	334 ft	3:09 am EDT (07:09 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 BTV when you get there the forecast at the estimated arrival, 11:54 am EDT (15:54 UTC)

Wind calm, visibility more than 6 miles, a broken layer at 2,100 feet marginal VFR

The whole forecast for BTV

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

The forecast for DEN, the departure

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

Temporary flight restrictions on the line or within 25 nm of it

6/8911 DENVER, CO, Monday, October 12, 2026 UTC 8 nm from the route, at the departure end · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZDV

Daylight

Sunset at DEN 6:22 pm MDT (00:22 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

Radar now, the southern Rockies · loop National Weather Service

Radar now, the northern Rockies · 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: Denver International, Patrick Leahy Burlington International.