Idaho Falls Regional to City Of Colorado Springs Municipal IDA → COS
437 nautical miles (502 statute miles) southeast on a straight line, true course 128°, about 116° magnetic at the departure end (variation 12E). At 120 knots that is 3 h 22 min at the quickest height in today's winds (39,000 ft, a 10-knot tailwind), arriving about 3:34 am MDT (09:34 UTC), after sunset at the destination. Right now IDA is marginal VFR, wind calm; COS is VFR, wind from the south (180°) at 10 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: 4 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 ZULU 2C: moderate icing up to 23,000 ft. Over the first 238 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 288 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the last 327 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the last 318 nm of the route.
- 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 last 248 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 189 to 248 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 IDA.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- urgent B737 at 7,600 ft, 6 nm west, 9:22 pm MDT (03:22 UTC): remarks: low-level wind shear 45 knots crosswind on final. 288 nm along the route, 6 nm west of the line.
as filed, and in English
HDN UUA /OV HDN/TM 0322/FL076/TP B737/RM LLWS 45 KTS CROSSWIND ON FINAL
- Report
- an urgent report filed through HDN
- Where
- over HDN
- Time
- 03:22 UTC
- Height
- at 7,600 ft
- Aircraft
- B737
- Remarks
- low-level wind shear 45 knots crosswind on final
- urgent E75L at 9,000 ft, 49 nm southwest, 10:30 pm MDT (04:30 UTC): remarks: low-level wind shear + 20K 1000-1500 above ground on approach. 347 nm along the route, 49 nm southwest of the line.
as filed, and in English
ASE UUA /OV ASE/TM 0430/FL090/TP E75L/RM LLWS +/- 20K 1000-1500 AGL ON APCH
- Report
- an urgent report filed through ASE
- Where
- over ASE
- Time
- 04:30 UTC
- Height
- at 9,000 ft
- Aircraft
- E75L
- Remarks
- low-level wind shear + 20K 1000-1500 above ground on approach
- CRJ7 at 6,300 ft, 43 nm southwest, 9:27 pm MDT (03:27 UTC): overcast above 6,300 ft, remarks: during the descent. At the departure end, 43 nm southwest of the line.
as filed, and in English
PIH UA /OV KPIH/TM 0327/FL063/TP CRJ7/SK OVC063-TOPUNKN/RM DURD
- Report
- a routine report filed through PIH
- Where
- over KPIH
- Time
- 03:27 UTC
- Height
- at 6,300 ft
- Aircraft
- CRJ7
- Sky
- overcast from 6,300 ft, tops unknown
- Remarks
- during the descent
- B38M at 21,500 ft, 46 nm northeast, 10:33 pm MDT (04:33 UTC): light turbulence up to 25,000 ft, remarks: during the descent flati star ZDVWC-13. 327 nm along the route, 46 nm northeast of the line.
as filed, and in English
DEN UA /OV DEN305065/TM 0433/FL215/TP B38M/TB LGT BLO 250/RM DURD FLATI STAR. ZDVWC-13
- Report
- a routine report filed through DEN
- Where
- 65 nm northwest (305°) of DEN
- Time
- 04:33 UTC
- Height
- at 21,500 ft
- Aircraft
- B38M
- Turbulence
- light below 25,000 ft
- Remarks
- during the descent flati star ZDVWC-13
- E170 at 22,500 ft, 11 nm southwest, 11:06 pm MDT (05:06 UTC): light to moderate turbulence up to 23,000 ft, remarks: during the descent tbarr star ZDVWC-13. 397 nm along the route, 11 nm southwest of the line.
as filed, and in English
DEN UA /OV DEN216057/TM 0506/FL225/TP E170/TB CONS LGT OCNL MOD BLO 230/RM DURD TBARR STAR. ZDVWC-13
- Report
- a routine report filed through DEN
- Where
- 57 nm southwest (216°) of DEN
- Time
- 05:06 UTC
- Height
- at 22,500 ft
- Aircraft
- E170
- Turbulence
- continuous light occasional moderate below 23,000 ft
- Remarks
- during the descent tbarr star ZDVWC-13
- A320 descending, 46 nm northeast, 9:19 pm MDT (03:19 UTC): no turbulence up to 10,000 ft. 397 nm along the route, 46 nm northeast of the line.
as filed, and in English
DEN UA /OV DEN/TM 0319/FLDURD/TP A320/TB NEG BLO 100
- Report
- a routine report filed through DEN
- Where
- over DEN
- Time
- 03:19 UTC
- Height
- during the descent
- Aircraft
- A320
- Turbulence
- no below 10,000 ft
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 4 forecast points nearest it (PIH, RKS, DEN, PUB). 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 | 210° at 26 kt | +4 kt | 14 °C | 116 kt | 3 h 46 min | 3:58 am MDT (09:58 UTC) |
| 9,500 ft | 220° at 28 kt | +2 kt | 7 °C | 118 kt | 3 h 42 min | 3:54 am MDT (09:54 UTC) |
| 11,500 ft | 230° at 34 kt | −5 kt | 3 °C | 125 kt | 3 h 30 min | 3:42 am MDT (09:42 UTC) |
| 13,500 ft | 230° at 36 kt | −4 kt | -2 °C | 124 kt | 3 h 31 min | 3:43 am MDT (09:43 UTC) |
| 15,500 ft | 220° at 38 kt | −2 kt | -6 °C | 122 kt | 3 h 35 min | 3:47 am MDT (09:47 UTC) |
| 17,500 ft | 220° at 40 kt | +1 kt | -10 °C | 119 kt | 3 h 40 min | 3:52 am MDT (09:52 UTC) |
| 18,000 ft FL180 | 220° at 40 kt | +2 kt | -11 °C | 118 kt | 3 h 42 min | 3:54 am MDT (09:54 UTC) |
| 24,000 ft FL240 | 210° at 52 kt | +5 kt | -23 °C | 115 kt | 3 h 48 min | 4:00 am MDT (10:00 UTC) |
| 30,000 ft FL300 | 220° at 59 kt | 0 | -28 °C | 120 kt | 3 h 38 min | 3:50 am MDT (09:50 UTC) |
| 34,000 ft FL340 | 230° at 63 kt | −7 kt | -35 °C | 127 kt | 3 h 26 min | 3:38 am MDT (09:38 UTC) |
| 39,000 ft FL390 | 230° at 58 kt | −10 kt | -44 °C | 130 kt | 3 h 22 min | 3:34 am MDT (09:34 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| PIH | used from 0 nm out; 47 nm from the line | L/V | 240/13 1° | 240/15 -3° | 210/42 -15° | 200/70 -25° | 220/74 -29° | 220/71 -36° | 220/62 -43° | |
| RKS | used from 99 nm out; 52 nm from the line | 200/41 | 220/44 1° | 220/35 -11° | 220/46 -24° | 210/53 -27° | 220/62 -35° | 230/61 -44° | ||
| DEN | used from 298 nm out; 86 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° | ||
| PUB | used from 397 nm out; 51 nm from the line | 230/25 13° | 230/32 6° | 220/44 -8° | 230/49 -21° | 240/70 -28° | 240/67 -34° | 240/58 -46° |
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 |
|---|---|---|---|---|---|---|---|
| IDA Idaho Falls, ID | departure | marginal VFR Sky: overcast at 2,000 feet | calm | 10+ mi | 2,000 ft | 4,743 ft | 11:53 pm MDT (05:53 UTC) |
| AFO Afton, WY | 69 nm out, 7 nm southwest of the line | VFR Sky: a broken layer at 4,100 feet, overcast at 4,700 feet | from the southeast (130°) at 3 knots | 10+ mi | 4,100 ft | 6,220 ft | 05:55 UTC |
| BPI Big Piney, WY | 99 nm out, 10 nm northeast of the line | VFR Sky: a broken layer at 7,500 feet, overcast at 9,000 feet | calm | 10+ mi | 7,500 ft | 6,993 ft | 05:53 UTC |
| RKS Rock Springs, WY | 179 nm out, 7 nm southwest of the line | marginal VFR Sky: a broken layer at 1,700 feet, overcast at 2,400 feet Weather: light rain | from the west-southwest (250°) at 11 knots | 10+ mi | 1,700 ft | 6,764 ft | 05:54 UTC |
| DWX Dixon, WY | 248 nm out, 15 nm northeast of the line | VFR Sky: a broken layer at 11,000 feet | from the south-southeast (150°) at 15 knots, gusting to 23 | 10+ mi | 11,000 ft | 6,548 ft | 05:55 UTC |
| HDN Hayden, CO | 288 nm out, 6 nm west of the line | VFR Sky: scattered clouds at 11,000 feet | from the northeast (050°) at 7 knots | 10+ mi | none | 6,606 ft | 05:56 UTC |
| GNB Granby, CO | 347 nm out, 20 nm northeast of the line | VFR Sky: scattered clouds at 4,600 feet, scattered clouds at 9,000 feet | from the west-southwest (240°) at 5 knots | 10+ mi | none | 8,207 ft | 05:55 UTC |
| COS Colorado Springs, CO | destination | 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) |
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 COS when you get there the forecast at the estimated arrival, 3:34 am MDT (09:34 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 VFR
The whole forecast for COS
- 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
The forecast for IDA, the departure
- From Mon 12:00 am MDT (06:00 UTC): wind light and variable, visibility 4 miles, mist, showers nearby, scattered clouds at 900 feet, a broken layer at 1,400 feet and more above
- From Mon 5:00 am MDT (11:00 UTC): wind light and variable, visibility 5 miles, light rain, mist, a broken layer at 600 feet, overcast at 1,500 feet
- From Mon 12:00 pm MDT (18:00 UTC): wind from the southwest at 11 knots, visibility 6 miles, light rain showers, mist, scattered clouds at 1,500 feet, overcast at 2,500 feet
- From Mon 10:00 pm MDT (04:00 UTC): wind light and variable, visibility 6 miles, mist, showers nearby, scattered clouds at 2,500 feet, a broken layer at 3,500 feet and more above
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 13 nm from the route, 407 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 13 October · ZDV
Daylight
Sunset at IDA 6:48 pm MDT (00:48 UTC), at COS 6:23 pm MDT (00:23 UTC) (civil twilight ends 6:50 pm MDT (00:50 UTC)). At 120 knots the arrival at COS is before sunrise there (7:04 am MDT (13:04 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: Idaho Falls Regional, City Of Colorado Springs Municipal.