City Of Colorado Springs Municipal to Jackson Hole Airport COS → JAC
397 nautical miles (456 statute miles) northwest on a straight line, true course 319°, about 311° magnetic at the departure end (variation 8E). At 120 knots that is 3 h 06 min at the quickest height in today's winds (8,500 ft, a 8-knot tailwind), arriving about 3:39 am MDT (09:39 UTC), after sunset at the destination. Right now COS is VFR, wind from the south (180°) at 10 knots; JAC is VFR, wind from the southwest (230°) at 5 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: 5 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 C10C: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 1:55 am MDT (07:55 UTC). Near the route, at the departure end.
as issued
WSUS32 KKCI 120555 MKCC WST 120555 CONVECTIVE SIGMET 10C VALID UNTIL 0755Z CO NM FROM 20NNE PUB-40WSW LAA-30WSW CIM-50WSW ALS-50ESE HBU-20NNE PUB AREA TS MOV FROM 22040KT. TOPS TO FL340.
- 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 258 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the first 337 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 347 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 248 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the last 208 nm of the route.
- AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 188 to 268 nm out.
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 COS.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
Not fetched just now.
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 (DEN, RKS, LND). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 8,500 ft | 210° at 28 kt | −8 kt | 11 °C | 128 kt | 3 h 06 min | 3:39 am MDT (09:39 UTC) |
| 10,500 ft | 220° at 33 kt | −2 kt | 8 °C | 122 kt | 3 h 15 min | 3:48 am MDT (09:48 UTC) |
| 12,500 ft | 230° at 39 kt | +3 kt | 2 °C | 117 kt | 3 h 24 min | 3:57 am MDT (09:57 UTC) |
| 14,500 ft | 230° at 40 kt | 0 | -2 °C | 120 kt | 3 h 18 min | 3:51 am MDT (09:51 UTC) |
| 16,500 ft | 220° at 41 kt | −3 kt | -6 °C | 123 kt | 3 h 14 min | 3:47 am MDT (09:47 UTC) |
| 18,000 ft FL180 | 220° at 41 kt | −5 kt | -10 °C | 125 kt | 3 h 11 min | 3:44 am MDT (09:44 UTC) |
| 24,000 ft FL240 | 220° at 45 kt | −4 kt | -23 °C | 124 kt | 3 h 12 min | 3:45 am MDT (09:45 UTC) |
| 30,000 ft FL300 | 220° at 52 kt | −6 kt | -28 °C | 126 kt | 3 h 09 min | 3:42 am MDT (09:42 UTC) |
| 34,000 ft FL340 | 230° at 60 kt | 0 | -36 °C | 120 kt | 3 h 18 min | 3:51 am MDT (09:51 UTC) |
| 39,000 ft FL390 | 230° at 58 kt | +6 kt | -45 °C | 114 kt | 3 h 29 min | 4:02 am MDT (10:02 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; 48 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° | ||
| RKS | used from 149 nm out; 91 nm from the line | 200/41 | 220/44 1° | 220/35 -11° | 220/46 -24° | 210/53 -27° | 220/62 -35° | 230/61 -44° | ||
| LND | used from 297 nm out; 36 nm from the line | 200/23 6° | 220/31 1° | 220/39 -11° | 230/39 -23° | 220/51 -28° | 220/66 -37° | 230/68 -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 |
|---|---|---|---|---|---|---|---|
| COS Colorado Springs, CO | departure | VFR Sky: a few clouds at 2,000 feet, a few clouds at 18,000 feet | from the south (180°) at 10 knots | 10+ mi | none | 6,187 ft | 11:54 pm MDT (05:54 UTC) |
| GNB Granby, CO | 99 nm out, 10 nm east of the line | VFR Sky: a broken layer at 9,000 feet | from the west-southwest (250°) at 5 knots | 10+ mi | 9,000 ft | 8,207 ft | 06:15 UTC |
| SBS Steamboat Springs, CO | 139 nm out, 7 nm west of the line | VFR Sky: scattered clouds at 7,000 feet, a broken layer at 8,500 feet, a broken layer at 12,000 feet | from the east (080°) at 4 knots | 10+ mi | 8,500 ft | 6,882 ft | 06:15 UTC |
| DWX Dixon, WY | 188 nm out, 6 nm south of the line | VFR Sky: scattered clouds at 6,500 feet, scattered clouds at 10,000 feet, a broken layer at 12,000 feet | from the south-southeast (160°) at 10 knots, gusting to 17 | 10+ mi | 12,000 ft | 6,548 ft | 06:15 UTC |
| PNA Pinedale, WY | 337 nm out, 7 nm south of the line | VFR Sky: scattered clouds at 2,900 feet, a broken layer at 7,500 feet, overcast at 11,000 feet | calm | 10+ mi | 7,500 ft | 7,096 ft | 06:15 UTC |
| JAC Jackson, WY | destination | VFR Sky: overcast at 5,500 feet | from the southwest (230°) at 5 knots | 10+ mi | 5,500 ft | 6,451 ft | 11:56 pm MDT (05:56 UTC) |
The highest airport on this list sits at 8,207 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At JAC when you get there the forecast at the estimated arrival, 3:39 am MDT (09:39 UTC)
Wind from the south at 7 knots, visibility more than 6 miles, showers nearby, scattered clouds at 1,500 feet, overcast at 2,500 feet marginal VFR
The whole forecast for JAC
- From Mon 12:00 am MDT (06:00 UTC): wind from the south at 7 knots, visibility more than 6 miles, showers nearby, scattered clouds at 1,500 feet, overcast at 2,500 feet
- From Mon 7:00 am MDT (13:00 UTC): wind from the north-northeast at 5 knots, visibility 6 miles, light rain showers, scattered clouds at 1,000 feet, overcast at 1,800 feet
- From Mon 3:00 pm MDT (21:00 UTC): wind from the southwest at 7 knots, visibility more than 6 miles, scattered clouds at 2,000 feet, overcast at 3,500 feet
- 30% chance between Mon 3:00 pm MDT (21:00 UTC) and 9:00 pm MDT (03:00 UTC): visibility 5 miles, light rain showers, a broken layer at 2,500 feet
- From Mon 9:00 pm MDT (03:00 UTC): wind from the north-northeast at 4 knots, visibility 6 miles, light rain showers, scattered clouds at 2,000 feet, overcast at 3,000 feet
The forecast for COS, the departure
- From Mon 12:00 am MDT (06:00 UTC): wind from the south at 12 knots, visibility more than 6 miles, scattered clouds at 6,000 feet, a broken layer at 20,000 feet
- From Mon 6:00 am MDT (12:00 UTC): wind from the north-northeast at 8 knots, visibility more than 6 miles, clear skies
- From Mon 11:00 am MDT (17:00 UTC): wind from the south at 15 knots, gusting to 25, visibility more than 6 miles, scattered clouds at 12,000 feet
- From Mon 1:00 pm MDT (19:00 UTC): wind from the south-southwest at 20 knots, gusting to 30, visibility more than 6 miles, scattered clouds at 12,000 feet
- From Mon 7:00 pm MDT (01:00 UTC): wind from the south-southwest at 12 knots, visibility more than 6 miles, clear skies
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 16 nm from the route, 30 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 13 October · ZDV
Daylight
Sunset at COS 6:23 pm MDT (00:23 UTC), at JAC 6:43 pm MDT (00:43 UTC) (civil twilight ends 7:12 pm MDT (01:12 UTC)). At 120 knots the arrival at JAC is before sunrise there (7:33 am MDT (13:33 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: City Of Colorado Springs Municipal, Jackson Hole Airport.