Boise Air Trml/Gowen Field to City Of Colorado Springs Municipal BOI → COS
593 nautical miles (683 statute miles) southeast on a straight line, true course 115°, about 102° magnetic at the departure end (variation 13E). At 120 knots that is 4 h 18 min at the quickest height in today's winds (34,000 ft, a 18-knot tailwind), arriving about 4:14 am MDT (10:14 UTC), after sunset at the destination. Right now BOI is VFR, wind from the west (270°) at 7 knots; COS is VFR, wind from the south (180°) at 11 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
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the first 109 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 30 to 386 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 49 to 455 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the last 316 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the last 297 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 237 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 356 to 395 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 BOI.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- urgent B737 at 7,600 ft, 25 nm north, 9:22 pm MDT (03:22 UTC): remarks: low-level wind shear 45 knots crosswind on final. 445 nm along the route, 25 nm north 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, 32 nm southwest, 10:30 pm MDT (04:30 UTC): remarks: low-level wind shear + 20K 1000-1500 above ground on approach. 494 nm along the route, 32 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
- E175 at 6,300 ft, 33 nm northeast, 10:20 pm MDT (04:20 UTC): overcast above 6,300 ft, remarks: during the descent runway 31. 79 nm along the route, 33 nm northeast of the line.
as filed, and in English
SUN UA /OV KSUN/TM 0420/FL063/TP E175/SK OVC063-TOPUNKN/RM DURD RY31
- Report
- a routine report filed through SUN
- Where
- over KSUN
- Time
- 04:20 UTC
- Height
- at 6,300 ft
- Aircraft
- E175
- Sky
- overcast from 6,300 ft, tops unknown
- Remarks
- during the descent runway 31
- E175 at 5,900 ft, 33 nm northeast, 9:29 pm MDT (03:29 UTC): a broken layer above 5,900 ft, remarks: during the descent runway 31. 79 nm along the route, 33 nm northeast of the line.
as filed, and in English
SUN UA /OV KSUN/TM 0329/FL059/TP E175/SK BKN059-TOPUNKN/RM DURD RY31
- Report
- a routine report filed through SUN
- Where
- over KSUN
- Time
- 03:29 UTC
- Height
- at 5,900 ft
- Aircraft
- E175
- Sky
- a broken layer from 5,900 ft, tops unknown
- Remarks
- during the descent runway 31
- E175 at 5,700 ft, 33 nm northeast, 8:59 pm MDT (02:59 UTC): a broken layer above 5,700 ft, remarks: during the descent runway 31. 79 nm along the route, 33 nm northeast of the line.
as filed, and in English
SUN UA /OV KSUN/TM 0259/FL057/TP E175/SK BKN057-TOPUNKN/RM DURD RY31
- Report
- a routine report filed through SUN
- Where
- over KSUN
- Time
- 02:59 UTC
- Height
- at 5,700 ft
- Aircraft
- E175
- Sky
- a broken layer from 5,700 ft, tops unknown
- Remarks
- during the descent runway 31
- CRJ7 at 6,300 ft, 35 nm northeast, 9:27 pm MDT (03:27 UTC): overcast above 6,300 ft, remarks: during the descent. 158 nm along the route, 35 nm northeast 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
- BE20 at 16,000 ft, 37 nm southwest, 9:28 pm MDT (03:28 UTC): light chop turbulence, light rime icing, -3 °C, remarks: ZDVWC-11. 455 nm along the route, 37 nm southwest of the line.
as filed, and in English
RIL UA /OV RIL/TM 0328/FL160/TP BE20/TA M03/TB LGT CHOP/IC LGT RIME/RM ZDVWC-11
- Report
- a routine report filed through RIL
- Where
- over RIL
- Time
- 03:28 UTC
- Height
- at 16,000 ft
- Aircraft
- BE20
- Temperature
- −3 °C
- Turbulence
- light chop
- Icing
- light rime
- Remarks
- ZDVWC-11
- E170 at 22,500 ft, 5 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. 554 nm along the route, 5 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
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 7 forecast points nearest it (BOI, PIH, SLC, RKS, GJT, 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 |
|---|---|---|---|---|---|---|
| 5,500 ft | 260° at 3 kt | −2 kt | 2 °C | 122 kt | 4 h 52 min | 4:48 am MDT (10:48 UTC) |
| 7,500 ft | 220° at 20 kt | −2 kt | 7 °C | 122 kt | 4 h 52 min | 4:48 am MDT (10:48 UTC) |
| 9,500 ft | 220° at 22 kt | −4 kt | 3 °C | 124 kt | 4 h 47 min | 4:43 am MDT (10:43 UTC) |
| 11,500 ft | 230° at 28 kt | −8 kt | 0 °C | 128 kt | 4 h 38 min | 4:34 am MDT (10:34 UTC) |
| 13,500 ft | 220° at 33 kt | −8 kt | -4 °C | 128 kt | 4 h 38 min | 4:34 am MDT (10:34 UTC) |
| 15,500 ft | 220° at 38 kt | −7 kt | -8 °C | 127 kt | 4 h 40 min | 4:36 am MDT (10:36 UTC) |
| 17,500 ft | 220° at 44 kt | −5 kt | -12 °C | 125 kt | 4 h 45 min | 4:41 am MDT (10:41 UTC) |
| 18,000 ft FL180 | 210° at 45 kt | −5 kt | -13 °C | 125 kt | 4 h 45 min | 4:41 am MDT (10:41 UTC) |
| 24,000 ft FL240 | 210° at 58 kt | −2 kt | -24 °C | 122 kt | 4 h 52 min | 4:48 am MDT (10:48 UTC) |
| 30,000 ft FL300 | 220° at 61 kt | −10 kt | -29 °C | 130 kt | 4 h 34 min | 4:30 am MDT (10:30 UTC) |
| 34,000 ft FL340 | 220° at 64 kt | −18 kt | -34 °C | 138 kt | 4 h 18 min | 4:14 am MDT (10:14 UTC) |
| 39,000 ft FL390 | 220° at 58 kt | −16 kt | -43 °C | 136 kt | 4 h 22 min | 4:18 am MDT (10:18 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| BOI | used from 0 nm out; 25 nm from the line | 300/7 2° | 280/5 -4° | 210/16 -9° | 210/60 -20° | 210/75 -29° | 210/63 -32° | 220/64 -32° | 220/54 -39° | |
| PIH | used from 99 nm out; 50 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° | |
| SLC | used from 198 nm out; 69 nm from the line | 200/5 | 230/8 2° | 220/20 -2° | 210/40 -12° | 190/53 -25° | 210/62 -30° | 220/69 -34° | 220/64 -43° | |
| RKS | used from 297 nm out; 43 nm from the line | 200/41 | 220/44 1° | 220/35 -11° | 220/46 -24° | 210/53 -27° | 220/62 -35° | 230/61 -44° | ||
| GJT | used from 395 nm out; 77 nm from the line | 210/43 7° | 230/45 1° | 220/49 -12° | 220/62 -22° | 220/59 -28° | 230/60 -33° | 220/55 -45° | ||
| DEN | used from 494 nm out; 68 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 544 nm out; 54 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 |
|---|---|---|---|---|---|---|---|
| BOI Boise, ID | departure | VFR Sky: overcast at 9,000 feet | from the west (270°) at 7 knots | 10+ mi | 9,000 ft | 2,871 ft | 11:53 pm MDT (05:53 UTC) |
| GNG Gooding, ID | 79 nm out, 9 nm southwest of the line | VFR Sky: scattered clouds at 3,700 feet, overcast at 4,800 feet | from the south (190°) at 7 knots | 10+ mi | 4,800 ft | 3,732 ft | 05:35 UTC |
| BYI Burley, ID | 119 nm out, 10 nm south of the line | VFR Sky: overcast at 3,900 feet | from the west-southwest (240°) at 6 knots | 10+ mi | 3,900 ft | 4,153 ft | 04:53 UTC |
| MLD Malad City, ID | 188 nm out, 4 nm east of the line | no report just now | 4,503 ft | ||||
| FBR Fort Bridger, WY | 287 nm out, 2 nm southeast of the line | VFR Sky: scattered clouds at 7,000 feet, overcast at 9,000 feet | from the west-southwest (250°) at 10 knots, gusting to 15 | 10+ mi | 9,000 ft | 7,038 ft | 05:35 UTC |
| EGE Eagle, CO | 474 nm out, 12 nm south of the line, tower | VFR Sky: a few clouds at 6,000 feet, a broken layer at 9,000 feet, overcast at 11,000 feet | from the west (280°) at 10 knots, gusting to 15 | 10+ mi | 9,000 ft | 6,547 ft | 04:56 UTC |
| LXV Leadville, CO | 514 nm out, 19 nm southwest of the line | VFR Sky: a broken layer at 7,000 feet | from the south (170°) at 10 knots | 10+ mi | 7,000 ft | 9,933 ft | 05:53 UTC |
| COS Colorado Springs, CO | destination | VFR Sky: a broken layer at 18,000 feet | from the south (180°) at 11 knots | 10+ mi | 18,000 ft | 6,187 ft | 10:54 pm MDT (04:54 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 COS when you get there the forecast at the estimated arrival, 4:14 am MDT (10:14 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 BOI, the departure
- From Mon 12:00 am MDT (06:00 UTC): wind light and variable, visibility more than 6 miles, a broken layer at 8,000 feet
- From Mon 2:00 am MDT (08:00 UTC): wind from the west-northwest at 5 knots, visibility more than 6 miles, scattered clouds at 4,000 feet, a broken layer at 8,000 feet
- From Mon 12:00 pm MDT (18:00 UTC): wind from the northwest at 10 knots, visibility more than 6 miles, a broken layer at 10,000 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 8 nm from the route, 563 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 13 October · ZDV
Daylight
Sunset at BOI 7:06 pm MDT (01:06 UTC), at COS 6:25 pm MDT (00:25 UTC) (civil twilight ends 6:51 pm MDT (00:51 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: Boise Air Trml/Gowen Field, City Of Colorado Springs Municipal.