Casper/Natrona County International to Denver International CPR → DEN
200 nautical miles (230 statute miles) southeast on a straight line, true course 156°, about 144° magnetic at the departure end (variation 12E). At 120 knots that is 1 h 34 min at the quickest height in today's winds (7,500 ft, a 8-knot tailwind), arriving about 4:33 am MDT (10:33 UTC), after sunset at the destination. Right now CPR is VFR, wind from the southwest (230°) at 22 knots, gusting to 28; DEN is VFR, wind from the south (180°) 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: 5,178 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 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 whole route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 42,000 ft. Over the whole route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the whole route.
- AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Near the route, 40 nm along the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Near the route, 50 nm along 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 CPR.
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 08:00–15:00 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 3 forecast points nearest it (LND, BFF, 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 | 270° at 22 kt | −8 kt | 8 °C | 128 kt | 1 h 34 min | 4:33 am MDT (10:33 UTC) |
| 9,500 ft | 260° at 23 kt | −5 kt | 8 °C | 125 kt | 1 h 36 min | 4:35 am MDT (10:35 UTC) |
| 11,500 ft | 240° at 22 kt | +2 kt | 4 °C | 118 kt | 1 h 42 min | 4:41 am MDT (10:41 UTC) |
| 13,500 ft | 230° at 28 kt | +7 kt | 1 °C | 113 kt | 1 h 46 min | 4:45 am MDT (10:45 UTC) |
| 15,500 ft | 230° at 35 kt | +11 kt | -4 °C | 109 kt | 1 h 50 min | 4:49 am MDT (10:49 UTC) |
| 17,500 ft | 220° at 42 kt | +16 kt | -9 °C | 104 kt | 1 h 55 min | 4:54 am MDT (10:54 UTC) |
| 18,000 ft FL180 | 220° at 44 kt | +17 kt | -10 °C | 103 kt | 1 h 57 min | 4:56 am MDT (10:56 UTC) |
| 24,000 ft FL240 | 220° at 48 kt | +18 kt | -21 °C | 102 kt | 1 h 58 min | 4:57 am MDT (10:57 UTC) |
| 30,000 ft FL300 | 230° at 60 kt | +19 kt | -31 °C | 101 kt | 1 h 59 min | 4:58 am MDT (10:58 UTC) |
| 34,000 ft FL340 | 230° at 67 kt | +14 kt | -36 °C | 106 kt | 1 h 53 min | 4:52 am MDT (10:52 UTC) |
| 39,000 ft FL390 | 240° at 66 kt | +11 kt | -46 °C | 109 kt | 1 h 50 min | 4:49 am MDT (10:49 UTC) |
Based on data from the 12th at 06:00 UTC; valid on the 12th at 12:00 UTC for use 08:00 to 15:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| LND | used from 0 nm out; 112 nm from the line | 240/10 3° | 240/30 0° | 220/42 -13° | 230/52 -23° | 220/54 -33° | 220/52 -36° | 220/53 -44° | ||
| BFF | used from 50 nm out; 98 nm from the line | 280/28 | 260/39 11° | 240/34 5° | 210/38 -11° | 210/52 -22° | 230/61 -31° | 230/61 -36° | 240/56 -45° | |
| DEN | used from 100 nm out; 75 nm from the line | 270/24 11° | 230/13 5° | 230/48 -8° | 230/46 -20° | 230/63 -30° | 240/78 -36° | 240/78 -48° |
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 |
|---|---|---|---|---|---|---|---|
| CPR Casper, WY | departure | VFR Sky: scattered clouds at 6,500 feet, a broken layer at 10,000 feet | from the southwest (230°) at 22 knots, gusting to 28 | 10+ mi | 10,000 ft | 5,344 ft | 2:53 am MDT (08:53 UTC) |
| LAR Laramie, WY | 100 nm out, 7 nm southwest of the line | VFR | from the west-southwest (240°) at 18 knots, gusting to 24 | 10+ mi | none | 7,283 ft | 08:53 UTC |
| FNL Fort Collins/Loveland, CO | 160 nm out, 1 nm south of the line, tower | VFR | from the southeast (140°) at 3 knots | 10+ mi | none | 5,020 ft | 08:56 UTC |
| DEN Denver, CO | destination | VFR | from the south (180°) at 13 knots | 10+ mi | none | 5,433 ft | 2:53 am MDT (08:53 UTC) |
The highest airport on this list sits at 7,283 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, 4:33 am MDT (10:33 UTC)
Wind from the south at 15 knots, visibility more than 6 miles, clear skies VFR
The whole forecast for DEN
- From Mon 3:00 am MDT (09:00 UTC): wind from the south at 15 knots, visibility more than 6 miles, clear skies
- 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 CPR, the departure
- From Mon 12:00 am MDT (06:00 UTC): wind from the south-southwest at 11 knots, visibility more than 6 miles, a broken layer at 10,000 feet
- 30% chance between Mon 12:00 am MDT (06:00 UTC) and 4:00 am MDT (10:00 UTC): visibility 5 miles, light rain showers, a broken layer at 3,000 feet
- From Mon 9:00 am MDT (15:00 UTC): wind from the north at 8 knots, visibility more than 6 miles, scattered clouds at 2,000 feet, a broken layer at 3,500 feet
- From Mon 3:00 pm MDT (21:00 UTC): wind from the north-northeast at 10 knots, visibility more than 6 miles, light rain showers, scattered clouds at 1,500 feet, a broken layer at 5,000 feet and more above
- From Mon 6:00 pm MDT (00:00 UTC): wind from the northeast at 10 knots, visibility 6 miles, light rain showers, scattered clouds at 1,000 feet, a broken layer at 2,000 feet and more above
- 30% chance between Mon 6:00 pm MDT (00:00 UTC) and 12:00 am MDT (06:00 UTC): visibility 4 miles, rain, a broken layer at 1,200 feet
Temporary flight restrictions on the line or within 25 nm of it
- 6/8911 DENVER, CO, Monday, October 12, 2026 UTC 5 nm from the route, 190 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZDV
Daylight
Sunset at CPR 6:26 pm MDT (00:26 UTC), at DEN 6:22 pm MDT (00:22 UTC) (civil twilight ends 6:49 pm MDT (00:49 UTC)). At 120 knots the arrival at DEN is before sunrise there (7:05 am MDT (13:05 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: Casper/Natrona County International, Denver International.