Denver International to Bert Mooney Airport DEN → BTM
502 nautical miles (577 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 53 min at the quickest height in today's winds (30,000 ft, a 9-knot tailwind), arriving about 1:22 am MDT (07:22 UTC), after sunset at the destination. Right now DEN is VFR, wind from the south-southwest (200°) at 16 knots; BTM is marginal VFR, wind from the west-northwest (300°) at 6 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: 732 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 2C: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the southwest at 40 knots, until 10:55 pm MDT (04:55 UTC). Near the route, 69 nm along the route.
as issued
WSUS32 KKCI 120255 MKCC WST 120255 CONVECTIVE SIGMET 2C VALID UNTIL 0455Z NE CO WY FROM 40SE CZI-30WNW BFF-30SSE LAR-70NW LAR-40SE CZI AREA TS MOV FROM 22040KT. TOPS TO FL310.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the first 344 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 413 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 route from 39 to 354 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 187 to 433 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 315 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 197 to 216 nm out.
- AIRMET SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the last 256 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 20,000 ft. Over the last 59 nm of the route.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the last 39 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 DEN.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- GLF4 at 25,000 ft, 39 nm southwest, 8:05 pm MDT (02:05 UTC): moderate turbulence, remarks: during the climb ZDVWC-05. At the departure end, 39 nm southwest of the line.
as filed, and in English
DEN UA /OV FQF250040/TM 0205/FL250/TP GLF4/TB MOD /RM DURC ZDVWC-05
- Report
- a routine report filed through DEN
- Where
- 40 nm west (250°) of FQF
- Time
- 02:05 UTC
- Height
- at 25,000 ft
- Aircraft
- GLF4
- Turbulence
- moderate
- Remarks
- during the climb ZDVWC-05
- B738 at 23,000 ft, 17 nm southwest, 8:34 pm MDT (02:34 UTC): moderate turbulence, remarks: during the climb ZDVWC-05. At the departure end, 17 nm southwest of the line.
as filed, and in English
DEN UA /OV DVV270030/TM 0234/FL230/TP B738/TB MOD /RM DURC ZDVWC-05
- Report
- a routine report filed through DEN
- Where
- 30 nm west (270°) of DVV
- Time
- 02:34 UTC
- Height
- at 23,000 ft
- Aircraft
- B738
- Turbulence
- moderate
- Remarks
- during the climb ZDVWC-05
- BCS1 at 24,000 ft, 17 nm southwest, 7:30 pm MDT (01:30 UTC): moderate turbulence from 22,000 ft to 24,000 ft, remarks: during the climb ZDVWC-05. At the departure end, 17 nm southwest of the line.
as filed, and in English
DEN UA /OV DVV270030/TM 0130/FL240/TP BCS1/TB MOD 220-240/RM DURC ZDVWC-05
- Report
- a routine report filed through DEN
- Where
- 30 nm west (270°) of DVV
- Time
- 01:30 UTC
- Height
- at 24,000 ft
- Aircraft
- BCS1
- Turbulence
- moderate from 22,000 ft to 24,000 ft
- Remarks
- during the climb ZDVWC-05
- CRJ2 at 19,000 ft, 9 nm southwest, 6:47 pm MDT (00:47 UTC): moderate chop turbulence, remarks: ZDVWC-13. 79 nm along the route, 9 nm southwest of the line.
as filed, and in English
EGE UA /OV RLG010052/TM 0047/FL190/TP CRJ2/TB COSN MOD CHOP/RM ZDVWC-13
- Report
- a routine report filed through EGE
- Where
- 52 nm north (010°) of RLG
- Time
- 00:47 UTC
- Height
- at 19,000 ft
- Aircraft
- CRJ2
- Turbulence
- cosn moderate chop
- Remarks
- ZDVWC-13
- S22T at 15,000 ft, 7 nm southwest, 7:47 pm MDT (01:47 UTC): moderate rime icing above 15,000 ft, -5 °C. 354 nm along the route, 7 nm southwest of the line.
as filed, and in English
JAC UA /OV DNW010020/TM 0147/FL150/TP S22T/TA M05/IC MOD RIME 150 /ZLC
- Report
- a routine report filed through JAC
- Where
- 20 nm north (010°) of DNW
- Time
- 01:47 UTC
- Height
- at 15,000 ft
- Aircraft
- S22T
- Temperature
- −5 °C
- Icing
- moderate rime at 15,000 ft zlc
- A320 descending, 3 nm south, 9:19 pm MDT (03:19 UTC): no turbulence up to 10,000 ft. At the departure end, 3 nm south 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
- B737 descending, 3 nm south, 8:29 pm MDT (02:29 UTC): no turbulence up to 10,000 ft. At the departure end, 3 nm south of the line.
as filed, and in English
DEN UA /OV DEN/TM 0229/FLDURD/TP B737/TB NEG BLO 100
- Report
- a routine report filed through DEN
- Where
- over DEN
- Time
- 02:29 UTC
- Height
- during the descent
- Aircraft
- B737
- Turbulence
- no below 10,000 ft
- B737 descending, 3 nm south, 7:23 pm MDT (01:23 UTC): no turbulence up to 10,000 ft. At the departure end, 3 nm south of the line.
as filed, and in English
DEN UA /OV DEN/TM 0123/FLDURD/TP B737/TB NEG BLO 100
- Report
- a routine report filed through DEN
- Where
- over DEN
- Time
- 01:23 UTC
- Height
- during the descent
- Aircraft
- B737
- Turbulence
- no below 10,000 ft
- E55P at 38,000 ft, 48 nm south, 7:23 pm MDT (01:23 UTC): light chop turbulence, remarks: ZDVWC-05. At the departure end, 48 nm south of the line.
as filed, and in English
DEN UA /OV FQF200040/TM 0123/FL380/TP E55P/TB LGT CHOP/RM ZDVWC-05
- Report
- a routine report filed through DEN
- Where
- 40 nm south (200°) of FQF
- Time
- 01:23 UTC
- Height
- at 38,000 ft
- Aircraft
- E55P
- Turbulence
- light chop
- Remarks
- ZDVWC-05
- GLF6 at 40,000 ft, 44 nm south, 6:48 pm MDT (00:48 UTC): light to moderate chop turbulence, remarks: ZDVWC-46. At the departure end, 44 nm south 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
- C56X at 13,000 ft, 22 nm northeast, 7:33 pm MDT (01:33 UTC): light chop turbulence, remarks: zdvwc. 98 nm along the route, 22 nm northeast of the line.
as filed, and in English
LAR UA /OV LAR/TM 0133/FL130/TP C56X/SK BASE160/TB OCNL CONS LGT CHOP/RM ZDVWC
- Report
- a routine report filed through LAR
- Where
- over LAR
- Time
- 01:33 UTC
- Height
- at 13,000 ft
- Aircraft
- C56X
- Sky
- BASE160
- Turbulence
- occasional continuous light chop
- Remarks
- zdvwc
- CRJ2 at 9,000 ft, 45 nm northeast, 6:35 pm MDT (00:35 UTC): light chop turbulence, vmc, remarks: occasional moderate turbulence at at 15,000 ft. 187 nm along the route, 45 nm northeast of the line.
as filed, and in English
CPR UA /OV CPR215015/TM 0035/FL090/TP CRJ2/WX VMC/TB LGT CHOP/RM OCNL MOD TURB AT 150
- Report
- a routine report filed through CPR
- Where
- 15 nm southwest (215°) of CPR
- Time
- 00:35 UTC
- Height
- at 9,000 ft
- Aircraft
- CRJ2
- Weather
- visual conditions
- Turbulence
- light chop
- Remarks
- occasional moderate turbulence at at 15,000 ft
- A320 descending, 47 nm southwest, 6:54 pm MDT (00:54 UTC): overcast above 7,500 ft, remarks: braking action good during the descent runway 19. 354 nm along the route, 47 nm southwest of the line.
as filed, and in English
JAC UA /OV JAC/TM 0054/FLUNKN/TP A320/SK OVC075/RM BRAKING ACTION GOOD DURD RY19
- Report
- a routine report filed through JAC
- Where
- over JAC
- Time
- 00:54 UTC
- Height
- height not given
- Aircraft
- A320
- Sky
- overcast from 7,500 ft
- Remarks
- braking action good during the descent runway 19
- E75L descending, 32 nm northeast, 7:04 pm MDT (01:04 UTC): remarks: had the airport in sight at 400-500FT above ground. 453 nm along the route, 32 nm northeast of the line.
as filed, and in English
BZN UA /OV BZN/TM 0104/FLDURD/TP E75L/RM HAD THE AIRPORT IN SIGHT AT 400-500FT AGL
- Report
- a routine report filed through BZN
- Where
- over BZN
- Time
- 01:04 UTC
- Height
- during the descent
- Aircraft
- E75L
- Remarks
- had the airport in sight at 400-500FT above ground
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 4 forecast points nearest it (DEN, RKS, LND, DLN). 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 | 200° at 16 kt | −7 kt | 4 °C | 127 kt | 3 h 57 min | 1:26 am MDT (07:26 UTC) |
| 10,500 ft | 220° at 23 kt | −2 kt | 2 °C | 122 kt | 4 h 07 min | 1:36 am MDT (07:36 UTC) |
| 12,500 ft | 230° at 32 kt | +2 kt | -1 °C | 118 kt | 4 h 15 min | 1:44 am MDT (07:44 UTC) |
| 14,500 ft | 230° at 34 kt | −1 kt | -5 °C | 121 kt | 4 h 09 min | 1:38 am MDT (07:38 UTC) |
| 16,500 ft | 220° at 37 kt | −4 kt | -9 °C | 124 kt | 4 h 03 min | 1:32 am MDT (07:32 UTC) |
| 18,000 ft FL180 | 220° at 39 kt | −7 kt | -12 °C | 127 kt | 3 h 57 min | 1:26 am MDT (07:26 UTC) |
| 24,000 ft FL240 | 220° at 48 kt | −7 kt | -23 °C | 127 kt | 3 h 57 min | 1:26 am MDT (07:26 UTC) |
| 30,000 ft FL300 | 220° at 56 kt | −9 kt | -30 °C | 129 kt | 3 h 53 min | 1:22 am MDT (07:22 UTC) |
| 34,000 ft FL340 | 220° at 68 kt | −9 kt | -36 °C | 129 kt | 3 h 53 min | 1:22 am MDT (07:22 UTC) |
| 39,000 ft FL390 | 230° at 66 kt | +1 kt | -44 °C | 119 kt | 4 h 13 min | 1:42 am MDT (07:42 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; 25 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 98 nm out; 118 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 148 nm out; 84 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° | ||
| DLN | used from 344 nm out; 110 nm from the line | 090/6 -6° | 240/22 -4° | 210/34 -16° | 210/62 -25° | 210/66 -34° | 210/82 -36° | 220/77 -42° |
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 |
|---|---|---|---|---|---|---|---|
| DEN Denver, CO | departure | VFR Sky: a few clouds at 14,000 feet, a broken layer at 22,000 feet | from the south-southwest (200°) at 16 knots | 10+ mi | 22,000 ft | 5,433 ft | 8:53 pm MDT (02:53 UTC) |
| FNL Fort Collins/Loveland, CO | 39 nm out, 12 nm northeast of the line, tower | VFR | from the northeast (050°) at 5 knots | 10+ mi | none | 5,020 ft | 02:56 UTC |
| LAR Laramie, WY | 98 nm out, 23 nm northeast of the line | VFR Sky: a few clouds at 8,000 feet, scattered clouds at 10,000 feet, a broken layer at 11,000 feet | from the south-southwest (200°) at 6 knots | 10+ mi | 11,000 ft | 7,283 ft | 02:53 UTC |
| SAA Saratoga, WY | 138 nm out, 11 nm southwest of the line | reported, no category | from the south-southeast (160°) at 17 knots, gusting to 23 | 10+ mi | none | 7,014 ft | 03:10 UTC |
| RWL Rawlins, WY | 167 nm out, 10 nm southwest of the line | VFR | from the south (180°) at 5 knots | 10+ mi | none | 6,816 ft | 13:53 UTC |
| RIW Riverton, WY | 256 nm out, 2 nm north of the line | IFR Sky: a broken layer at 500 feet | from the northeast (050°) at 3 knots | 10+ mi | 500 ft | 5,516 ft | 03:22 UTC |
| DUB Dubois, WY | 315 nm out, 17 nm southwest of the line | low IFR Sky: overcast at 300 feet Weather: light rain | from the east-southeast (120°) at 9 knots, gusting to 16 | 7 mi | 300 ft | 7,298 ft | 03:15 UTC |
| WYS West Yellowstone, MT | 403 nm out, 14 nm southwest of the line | low IFR Sky: overcast at 300 feet Weather: light snow, mist | variable at 5 knots | 1.25 mi | 300 ft | 6,649 ft | 03:15 UTC |
| EKS Ennis, MT | 453 nm out, 6 nm south of the line | low IFR Sky: overcast at 300 feet Weather: light snow, mist | from the north (350°) at 17 knots | 1 mi | 300 ft | 5,432 ft | 03:15 UTC |
| BTM Butte, MT | destination | marginal VFR Sky: a few clouds at 1,000 feet, overcast at 3,200 feet Weather: light snow, mist | from the west-northwest (300°) at 6 knots | 5 mi | 3,200 ft | 5,550 ft | 9:23 pm MDT (03:23 UTC) |
The highest airport on this list sits at 7,298 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BTM when you get there the forecast at the estimated arrival, 1:22 am MDT (07:22 UTC)
Wind from the south at 2 knots, visibility 1 mile, mist, fog nearby, scattered clouds at 500 feet, overcast at 1,500 feet IFR
30% chance between Mon 12:00 am MDT (06:00 UTC) and 3:00 am MDT (09:00 UTC): visibility ½ mile, snow, overcast at 700 feet low IFR
The whole forecast for BTM
- From Sun 7:00 pm MDT (01:00 UTC): wind light and variable, visibility ½ mile, light snow, fog, overcast at 1,500 feet
- From Sun 9:00 pm MDT (03:00 UTC): wind from the south-southeast at 5 knots, visibility 4 miles, light snow, mist, a broken layer at 2,000 feet
- From Mon 12:00 am MDT (06:00 UTC): wind from the south at 2 knots, visibility 1 mile, mist, fog nearby, scattered clouds at 500 feet, overcast at 1,500 feet
- 30% chance between Mon 12:00 am MDT (06:00 UTC) and 3:00 am MDT (09:00 UTC): visibility ½ mile, snow, overcast at 700 feet
- From Mon 3:00 am MDT (09:00 UTC): wind from the north-northeast at 5 knots, visibility 1 mile, mist, fog nearby, overcast at 1,500 feet
- From Mon 10:00 am MDT (16:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 3,000 feet
The forecast for DEN, the departure
- From Sun 9:00 pm MDT (03:00 UTC): wind from the south at 14 knots, gusting to 23, visibility more than 6 miles, a few clouds at 14,000 feet, a broken layer at 22,000 feet
- At times between Sun 9:00 pm MDT (03:00 UTC) and 12:00 am MDT (06:00 UTC): wind from the south-southwest at 25 knots, gusting to 37
- 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
Temporary flight restrictions on the line or within 25 nm of it
No temporary flight restriction on or near this route right now.
Daylight
Sunset at DEN 6:24 pm MDT (00:24 UTC), at BTM 6:49 pm MDT (00:49 UTC) (civil twilight ends 7:19 pm MDT (01:19 UTC)). At 120 knots the arrival at BTM is before sunrise there (7:42 am MDT (13:42 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: Denver International, Bert Mooney Airport.