Gunnison-Crested Butte Regional to Denver International GUC → DEN
132 nautical miles (152 statute miles) northeast on a straight line, true course 052°, about 040° magnetic at the departure end (variation 12E). At 120 knots that is 43 min at the quickest height in today's winds (30,000 ft, a 64-knot tailwind), arriving about 8:06 pm MDT (02:06 UTC), after sunset at the destination. Right now GUC is VFR, wind from the south-southwest (200°) at 11 knots; DEN is VFR, wind from the south (170°) at 13 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: 1,979 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 1W: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 8:55 pm MDT (02:55 UTC). Over the first 57 nm of the route.
as issued
WSUS33 KKCI 120055 MKCW WST 120055 CONVECTIVE SIGMET 1W VALID UNTIL 0255Z CO NM WY AZ UT FROM 40NNW CHE-40WNW TBE-60WNW CME-40N SJN-40ESE MTU-40NNW CHE AREA SEV TS MOV FROM 23040KT. TOPS TO FL340. WIND GUSTS TO 60KT POSS.
- AIRMET TANGO 1W: 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 first 19 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the whole route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the whole route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 38 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 GUC.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- UAL2238 at 38,000 ft, 26 nm south, 5:44 pm MDT (23:44 UTC): moderate turbulence, wind 244° at 64 knots. At the departure end, 26 nm south of the line.
as filed, and in English
ARP UAL2238 3807N 10649W 2344 F380 244/064KT TB CONT MOD TURB IC
- Report
- a routine report filed through ARP
- C680 at 18,000 ft, 33 nm northwest, 4:35 pm MDT (22:35 UTC): moderate turbulence, remarks: from 18,000 ft to 10,000 ft. 9 nm along the route, 33 nm northwest of the line.
as filed, and in English
ASE UA /OV ASE230020/TM 2235/FL180/TP C680/TB MOD/RM 180-100
- Report
- a routine report filed through ASE
- Where
- 20 nm southwest (230°) of ASE
- Time
- 22:35 UTC
- Height
- at 18,000 ft
- Aircraft
- C680
- Turbulence
- moderate
- Remarks
- from 18,000 ft to 10,000 ft
- C680A at 16,000 ft, 31 nm northwest, 4:59 pm MDT (22:59 UTC): moderate turbulence, scattered clouds above 16,000 ft, remarks: during the descent. 28 nm along the route, 31 nm northwest of the line.
as filed, and in English
ASE UA /OV HAERI/TM 2259/FL160/TP C680A/SK SCT160/TB CONS MOD/RM DURD
- Report
- a routine report filed through ASE
- Where
- haeri
- Time
- 22:59 UTC
- Height
- at 16,000 ft
- Aircraft
- C680A
- Sky
- scattered clouds from 16,000 ft
- Turbulence
- continuous moderate
- Remarks
- during the descent
- C650 at 40,000 ft, 42 nm northwest, 5:48 pm MDT (23:48 UTC): moderate turbulence, remarks: ZDVWC-03. 38 nm along the route, 42 nm northwest of the line.
as filed, and in English
ASE UA /OV DBL/TM 2348/FL400/TP C650/TB MOD /RM ZDVWC-03
- Report
- a routine report filed through ASE
- Where
- over DBL
- Time
- 23:48 UTC
- Height
- at 40,000 ft
- Aircraft
- C650
- Turbulence
- moderate
- Remarks
- ZDVWC-03
- GLF5 at 45,000 ft, 30 nm southeast, 4:44 pm MDT (22:44 UTC): moderate turbulence, remarks: ZDVWC-46. 104 nm along the route, 30 nm southeast of the line.
as filed, and in English
COS UA /OV COS350025/TM 2244/FL450/TP GLF5/TB MOD /RM ZDVWC-46
- Report
- a routine report filed through COS
- Where
- 25 nm north (350°) of COS
- Time
- 22:44 UTC
- Height
- at 45,000 ft
- Aircraft
- GLF5
- Turbulence
- moderate
- Remarks
- ZDVWC-46
- A21N at 32,000 ft, 46 nm northeast, 5:42 pm MDT (23:42 UTC): moderate chop turbulence, remarks: ZDVWC-61. At the destination end, 46 nm northeast of the line.
as filed, and in English
AKO UA /OV AKO270030/TM 2342/FL320/TP A21N/TB INTMT MOD CHOP/RM ZDVWC-61
- Report
- a routine report filed through AKO
- Where
- 30 nm west (270°) of AKO
- Time
- 23:42 UTC
- Height
- at 32,000 ft
- Aircraft
- A21N
- Turbulence
- intermittent moderate chop
- Remarks
- ZDVWC-61
- BCS3 at 24,000 ft, 42 nm northwest, 5:28 pm MDT (23:28 UTC): moderate turbulence from 22,000 ft to 24,000 ft, remarks: during the descent. At the destination end, 42 nm northwest of the line.
as filed, and in English
DEN UA /OV DEN320045/TM 2328/FL240/TP BCS3/TB MOD 240-220/RM DURD
- Report
- a routine report filed through DEN
- Where
- 45 nm northwest (320°) of DEN
- Time
- 23:28 UTC
- Height
- at 24,000 ft
- Aircraft
- BCS3
- Turbulence
- moderate from 24,000 ft to 22,000 ft
- Remarks
- during the descent
- LJ60 at 15,000 ft, 33 nm northwest, 6:28 pm MDT (00:28 UTC): light to moderate icing from 16,500 ft to 19,000 ft, -13 °C, remarks: during the descent zdvwc. At the departure end, 33 nm northwest of the line.
as filed, and in English
MTJ UA /OV MTJ030030/TM 0028/FL150/TP LJ60/TA M13/IC LGT-MOD 190-165/RM DURD ZDVWC
- Report
- a routine report filed through MTJ
- Where
- 30 nm northeast (030°) of MTJ
- Time
- 00:28 UTC
- Height
- at 15,000 ft
- Aircraft
- LJ60
- Temperature
- −13 °C
- Icing
- light to moderate from 19,000 ft to 16,500 ft
- Remarks
- during the descent zdvwc
- UAL2862 at 34,000 ft, 37 nm northwest, 4:39 pm MDT (22:39 UTC): no turbulence, wind 238° at 63 knots. 19 nm along the route, 37 nm northwest of the line.
as filed, and in English
ARP UAL2862 3911N 10708W 2239 F340 238/063KT TB SMTH IC
- Report
- a routine report filed through ARP
- C680A at 14,000 ft, 42 nm northwest, 5:02 pm MDT (23:02 UTC): light to moderate chop turbulence. 38 nm along the route, 42 nm northwest of the line.
as filed, and in English
ASE UA /OV DBL/TM 2302/FL140/TP C680A/TB LGT OCNL MOD CHOP
- Report
- a routine report filed through ASE
- Where
- over DBL
- Time
- 23:02 UTC
- Height
- at 14,000 ft
- Aircraft
- C680A
- Turbulence
- light occasional moderate chop
- B738 at 38,000 ft, 37 nm northwest, 4:39 pm MDT (22:39 UTC): light chop turbulence, remarks: light mountain wave a 8-knot loss of airspeed zdvwc. 75 nm along the route, 37 nm northwest of the line.
as filed, and in English
ASE UA /OV DBL047040/TM 2239/FL380/TP B738/TB LGT CHOP/RM LGT MTN WAVE +/-8KTS ZDVWC
- Report
- a routine report filed through ASE
- Where
- 40 nm northeast (047°) of DBL
- Time
- 22:39 UTC
- Height
- at 38,000 ft
- Aircraft
- B738
- Turbulence
- light chop
- Remarks
- light mountain wave a 8-knot loss of airspeed zdvwc
- B737 at 25,000 ft, 41 nm southeast, 6:29 pm MDT (00:29 UTC): light rime icing, 0 °C, remarks: during the climb ZDVWC-29. 85 nm along the route, 41 nm southeast of the line.
as filed, and in English
COS UA /OV BRK242015/TM 0029/FL250/TP B737/SK TOP280/TA 00/IC LGT RIME/RM DURC ZDVWC-29
- Report
- a routine report filed through COS
- Where
- 15 nm southwest (242°) of BRK
- Time
- 00:29 UTC
- Height
- at 25,000 ft
- Aircraft
- B737
- Sky
- TOP280
- Temperature
- 0 °C
- Icing
- light rime
- Remarks
- during the climb ZDVWC-29
- GLF6 at 40,000 ft, 32 nm southeast, 6:48 pm MDT (00:48 UTC): light to moderate chop turbulence, remarks: ZDVWC-46. 104 nm along the route, 32 nm southeast of the line.
as filed, and in English
COS UA /OV COS340020/TM 0048/FL400/TP GLF6/TB LGT-MOD CHOP/RM ZDVWC-46
- Report
- a routine report filed through COS
- Where
- 20 nm north (340°) of COS
- Time
- 00:48 UTC
- Height
- at 40,000 ft
- Aircraft
- GLF6
- Turbulence
- light to moderate chop
- Remarks
- ZDVWC-46
- B737 at 14,000 ft, 24 nm southeast, 6:20 pm MDT (00:20 UTC): light to moderate turbulence, remarks: light to moderate from 14,000 ft to 16,000 ft occn light above 16,000 ft. 113 nm along the route, 24 nm southeast of the line.
as filed, and in English
DEN UA /OV DEN170025/TM 0020/FL140/TP B737/TB LGT-MOD/RM LGT-MOD 140-160 OCCN LGT ABOVE 160
- Report
- a routine report filed through DEN
- Where
- 25 nm south (170°) of DEN
- Time
- 00:20 UTC
- Height
- at 14,000 ft
- Aircraft
- B737
- Turbulence
- light to moderate
- Remarks
- light to moderate from 14,000 ft to 16,000 ft occn light above 16,000 ft
6 more routine reports are on the map.
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 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 2 forecast points nearest it (ALS, 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 |
|---|---|---|---|---|---|---|
| 7,500 ft | 190° at 31 kt | −23 kt | 16 °C | 143 kt | 55 min | 8:18 pm MDT (02:18 UTC) |
| 9,500 ft | 190° at 31 kt | −24 kt | 14 °C | 144 kt | 55 min | 8:18 pm MDT (02:18 UTC) |
| 11,500 ft | 210° at 32 kt | −29 kt | 7 °C | 149 kt | 53 min | 8:16 pm MDT (02:16 UTC) |
| 13,500 ft | 220° at 34 kt | −33 kt | 3 °C | 153 kt | 52 min | 8:15 pm MDT (02:15 UTC) |
| 15,500 ft | 230° at 38 kt | −38 kt | -2 °C | 158 kt | 50 min | 8:13 pm MDT (02:13 UTC) |
| 17,500 ft | 230° at 42 kt | −42 kt | -7 °C | 162 kt | 49 min | 8:12 pm MDT (02:12 UTC) |
| 18,000 ft FL180 | 240° at 43 kt | −43 kt | -8 °C | 163 kt | 49 min | 8:12 pm MDT (02:12 UTC) |
| 24,000 ft FL240 | 230° at 48 kt | −48 kt | -21 °C | 168 kt | 47 min | 8:10 pm MDT (02:10 UTC) |
| 30,000 ft FL300 | 240° at 64 kt | −64 kt | -31 °C | 184 kt | 43 min | 8:06 pm MDT (02:06 UTC) |
| 34,000 ft FL340 | 250° at 68 kt | −66 kt | -37 °C | 186 kt | 43 min | 8:06 pm MDT (02:06 UTC) |
| 39,000 ft FL390 | 250° at 61 kt | −59 kt | -47 °C | 179 kt | 44 min | 8:07 pm MDT (02:07 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| ALS | used from 0 nm out; 86 nm from the line | 210/32 5° | 230/48 -8° | 230/49 -20° | 230/78 -30° | 240/74 -36° | 240/61 -47° | |||
| DEN | used from 47 nm out; 61 nm from the line | 190/31 16° | 210/32 7° | 240/41 -8° | 230/47 -21° | 240/56 -32° | 250/65 -37° | 250/61 -47° |
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 |
|---|---|---|---|---|---|---|---|
| GUC Gunnison, CO | departure | VFR Sky: a broken layer at 8,000 feet, overcast at 9,500 feet | from the south-southwest (200°) at 11 knots | 10+ mi | 8,000 ft | 7,679 ft | 6:56 pm MDT (00:56 UTC) |
| AEJ Buena Vista, CO | 38 nm out, 10 nm southeast of the line | VFR Sky: scattered clouds at 11,000 feet | from the southeast (130°) at 19 knots, gusting to 24 | 10+ mi | none | 7,950 ft | 01:15 UTC |
| LXV Leadville, CO | 47 nm out, 15 nm northwest of the line | VFR Sky: scattered clouds at 8,000 feet, a broken layer at 9,000 feet, a broken layer at 11,000 feet | from the south (170°) at 9 knots | 10+ mi | 9,000 ft | 9,933 ft | 00:53 UTC |
| APA Denver, CO | 113 nm out, 9 nm southeast of the line, tower | VFR Sky: a few clouds at 10,000 feet, scattered clouds at 14,000 feet, a broken layer at 22,000 feet | from the south-southwest (200°) at 23 knots, gusting to 31 | 10+ mi | 22,000 ft | 5,884 ft | 00:53 UTC |
| DEN Denver, CO | destination | VFR Sky: a few clouds at 11,000 feet, a few clouds at 14,000 feet, a broken layer at 22,000 feet | from the south (170°) at 13 knots | 10+ mi | 22,000 ft | 5,433 ft | 6:53 pm MDT (00:53 UTC) |
The highest airport on this list sits at 9,933 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, 8:06 pm MDT (02:06 UTC)
Wind from the southwest at 14 knots, gusting to 23, visibility more than 6 miles, a few clouds at 14,000 feet, scattered clouds at 22,000 feet VFR
The whole forecast for DEN
- From Sun 7:00 pm MDT (01:00 UTC): wind from the south at 14 knots, gusting to 21, visibility more than 6 miles, a few clouds at 10,000 feet, a few clouds at 14,000 feet and more above
- From Sun 7:00 pm MDT (01:00 UTC): wind from the southwest at 14 knots, gusting to 23, visibility more than 6 miles, a few clouds at 14,000 feet, scattered clouds at 22,000 feet
- From Mon 1:00 am MDT (07:00 UTC): wind from the south at 11 knots, visibility more than 6 miles, a few clouds at 22,000 feet
- From Mon 9:00 am MDT (15:00 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, clear skies
The forecast for GUC, the departure
- From Sun 6:00 pm MDT (00:00 UTC): wind from the south-southeast at 11 knots, gusting to 23, visibility more than 6 miles, scattered clouds at 9,000 feet, a broken layer at 12,000 feet
- 30% chance between Sun 6:00 pm MDT (00:00 UTC) and 9:00 pm MDT (03:00 UTC): visibility 4 miles, light rain showers, a broken layer at 6,000 feet
- From Sun 10:00 pm MDT (04:00 UTC): wind from the south at 9 knots, visibility more than 6 miles, scattered clouds at 4,500 feet, a broken layer at 8,000 feet
- From Mon 1:00 am MDT (07:00 UTC): wind from the southwest at 8 knots, visibility more than 6 miles, a few clouds at 5,000 feet, scattered clouds at 13,000 feet
- From Mon 3:00 am MDT (09:00 UTC): wind from the south-southwest at 5 knots, visibility more than 6 miles, a few clouds at 7,000 feet, scattered clouds at 20,000 feet
- From Mon 1:00 pm MDT (19:00 UTC): wind from the west-southwest at 8 knots, visibility more than 6 miles, a few clouds at 7,000 feet, scattered clouds at 25,000 feet
Temporary flight restrictions on the line or within 25 nm of it
- 6/8784 LAKE GEORGE, CO, Sunday, October 11, 2026 through Tuesday, October 13, 2026 UTC 20 nm from the route, 75 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 13 October · ZDV
Daylight
Sunset at GUC 6:34 pm MDT (00:34 UTC), at DEN 6:24 pm MDT (00:24 UTC) (civil twilight ends 6:51 pm MDT (00:51 UTC)). At 120 knots the arrival at DEN is after sunset there (6:25 pm MDT (00:25 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: Gunnison-Crested Butte Regional, Denver International.