Plan a flight · Sun 8:11 pm MDT (02:11 UTC)

Bert Mooney Airport to Harry Reid International BTM → LAS

605 nautical miles (696 statute miles) south on a straight line, true course 192°, about 180° magnetic at the departure end (variation 12E). At 120 knots that is 5 h 30 min at the quickest height in today's winds (4,500 ft, a 10-knot headwind), arriving about 12:41 am PDT (07:41 UTC), after sunset at the destination. Right now BTM is IFR, wind from the northwest (320°) at 7 knots, gusting to 15; LAS is VFR, wind from the south-southeast (150°) at 8 knots, gusting to 21. 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: 2 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 W10W: thunderstorms (a convective SIGMET) up to 30,000 ft, moving from the southwest at 20 knots, until 9:55 pm MDT (03:55 UTC). Near the route, 288 nm along the route.
as issued
```
WSUS33 KKCI 120155
MKCW WST 120155
CONVECTIVE SIGMET 10W
VALID UNTIL 0355Z
NV
FROM 70SW TWF-40NNW BVL-40SW ELY-30ESE OAL-40WNW OAL-70SW TWF
AREA TS MOV FROM 23020KT. TOPS TO FL300.
```
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 first 178 nm of the route.
AIRMET ZULU 2C: moderate icing up to 16,000 ft. Over the first 50 nm of the route.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the first 585 nm of the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 595 nm of the route.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the last 535 nm of the route.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the last 258 nm of the route.
AIRMET SIERRA 2E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the route from 506 to 565 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 BTM.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

B738 at 33,000 ft, 45 nm east, 5:57 pm MDT (23:57 UTC): moderate chop turbulence from 31,000 ft to 33,000 ft. 79 nm along the route, 45 nm east of the line.
as filed, and in English
```
IDA UA /OV DBS015030/TM 2357/FL330/TP B738/TB MOD CHOP 310-330 /ZLC
```
Report
a routine report filed through IDA
Where
30 nm north (015°) of DBS
Time
23:57 UTC
Height
at 33,000 ft
Aircraft
B738
Turbulence
moderate chop from 31,000 ft to 33,000 ft zlc
E145 at 15,000 ft, 45 nm southwest, 7:45 pm MDT (01:45 UTC): moderate chop turbulence, light rime icing, -9 °C. At the destination end, 45 nm southwest of the line.
as filed, and in English
```
LAS UA /OV LAS213045/TM 0145/FL150/TP E145/TA M09/TB MOD CHOP/IC LGT RIME
```
Report
a routine report filed through LAS
Where
45 nm southwest (213°) of LAS
Time
01:45 UTC
Height
at 15,000 ft
Aircraft
E145
Temperature
−9 °C
Turbulence
moderate chop
Icing
light rime
B738 at 24,000 ft, 28 nm east, 5:13 pm MDT (23:13 UTC): remarks: snow top flight level at 24,000 ft zlc. At the departure end, 28 nm east of the line.
as filed, and in English
```
BZN UA /OV BZN270030/TM 2313/FL240/TP B738/RM SN TOP FL 240 /ZLC
```
Report
a routine report filed through BZN
Where
30 nm west (270°) of BZN
Time
23:13 UTC
Height
at 24,000 ft
Aircraft
B738
Remarks
snow top flight level at 24,000 ft zlc
PC12 at 6,000 ft, 45 nm west, 7:09 pm MDT (01:09 UTC): scattered clouds up to 6,000 ft, remarks: multiple scattered layers during the descent runway 31. 159 nm along the route, 45 nm west of the line.
as filed, and in English
```
SUN UA /OV KSUN/TM 0109/FL060/TP PC12/SK SCT-TOP060/WX FV05SM/RM MULTIPLE SCT LAYERS DURD RY31
```
Report
a routine report filed through SUN
Where
over KSUN
Time
01:09 UTC
Height
at 6,000 ft
Aircraft
PC12
Sky
scattered clouds, tops 6,000 ft
Weather
flight visibility 5 miles
Remarks
multiple scattered layers during the descent runway 31
E550 at 21,000 ft, 45 nm west, 5:27 pm MDT (23:27 UTC): light turbulence, a few clouds above 7,000 ft, remarks: during the climb zlc. 159 nm along the route, 45 nm west of the line.
as filed, and in English
```
SUN UA /OV SUN/TM 2327/FL210/TP E550/SK FEW070/TB CONS LGT/RM DURC /ZLC
```
Report
a routine report filed through SUN
Where
over SUN
Time
23:27 UTC
Height
at 21,000 ft
Aircraft
E550
Sky
a few clouds from 7,000 ft
Turbulence
continuous light
Remarks
during the climb zlc
B737 at 24,000 ft, 46 nm east, 5:29 pm MDT (23:29 UTC): light rime icing, -21 °C, remarks: during the descent during the descent choww arv zlawc. 565 nm along the route, 46 nm east of the line.
as filed, and in English
```
CDC UA /OV MMM120015/TM 2329/FL240/TP B737/TA M21/IC LGT RIME/RM DURD DURD CHOWW ARV /ZLAWC AWC-WEB
```
Report
a routine report filed through CDC
Where
15 nm southeast (120°) of MMM
Time
23:29 UTC
Height
at 24,000 ft
Aircraft
B737
Temperature
−21 °C
Icing
light rime
Remarks
during the descent during the descent choww arv zlawc
G280 at 41,000 ft, 35 nm southwest, 5:37 pm MDT (23:37 UTC): light to moderate clear-air turbulence, remarks: ZDVWC-46. At the destination end, 35 nm southwest of the line.
as filed, and in English
```
ALS UA /OV LAS190035/TM 2337/FL410/TP G280/TB LGT-MOD CAT/RM ZDVWC-46
```
Report
a routine report filed through ALS
Where
35 nm south (190°) of LAS
Time
23:37 UTC
Height
at 41,000 ft
Aircraft
G280
Turbulence
light to moderate clear-air turbulence
Remarks
ZDVWC-46

Winds aloft along the route, and the time en route the forecast for use 20:00–03:00 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 5 forecast points nearest it (DLN, PIH, SLC, ELY, LAS). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
4,500 ft	230° at 12 kt	+10 kt	11 °C	110 kt	5 h 30 min	12:41 am PDT (07:41 UTC)
6,500 ft	230° at 13 kt	+10 kt	10 °C	110 kt	5 h 30 min	12:41 am PDT (07:41 UTC)
8,500 ft	220° at 14 kt	+12 kt	3 °C	108 kt	5 h 36 min	12:47 am PDT (07:47 UTC)
10,500 ft	220° at 17 kt	+14 kt	1 °C	106 kt	5 h 42 min	12:53 am PDT (07:53 UTC)
12,500 ft	220° at 21 kt	+18 kt	-3 °C	102 kt	5 h 56 min	1:07 am PDT (08:07 UTC)
14,500 ft	220° at 28 kt	+25 kt	-6 °C	95 kt	6 h 22 min	1:33 am PDT (08:33 UTC)
16,500 ft	210° at 34 kt	+32 kt	-10 °C	88 kt	6 h 52 min	2:03 am PDT (09:03 UTC)
18,000 ft FL180	210° at 39 kt	+37 kt	-12 °C	83 kt	7 h 17 min	2:28 am PDT (09:28 UTC)
24,000 ft FL240	200° at 53 kt	+52 kt	-23 °C	68 kt	8 h 54 min	4:05 am PDT (11:05 UTC)
30,000 ft FL300	210° at 67 kt	+64 kt	-30 °C	56 kt	10 h 48 min	5:59 am PDT (12:59 UTC)
34,000 ft FL340	220° at 73 kt	+65 kt	-37 °C	55 kt	11 h	6:11 am PDT (13:11 UTC)
39,000 ft FL390	230° at 70 kt	+58 kt	-44 °C	62 kt	9 h 45 min	4:56 am PDT (11:56 UTC)

Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 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	6,000	9,000	12,000	18,000	24,000	30,000	34,000	39,000
DLN	used from 0 nm out; 18 nm from the line		080/10 -3°	180/8 -3°	180/23 -14°	200/58 -22°	200/80 -36°	220/85 -41°	230/81 -45°
PIH	used from 99 nm out; 66 nm from the line	270/10	270/13 1°	210/16 -2°	200/56 -11°	200/51 -23°	200/68 -33°	220/77 -37°	230/73 -44°
SLC	used from 248 nm out; 93 nm from the line	280/8	210/39 5°	210/52 -1°	200/50 -11°	200/56 -23°	220/61 -28°	230/73 -37°	230/73 -45°
ELY	used from 297 nm out; 92 nm from the line		210/20 4°	240/21 -1°	230/37 -13°	200/58 -25°	220/73 -27°	220/73 -36°	220/69 -44°
LAS	used from 496 nm out; 84 nm from the line	200/25 11°	230/22 5°	240/25 -1°	220/37 -12°	220/44 -21°	210/52 -27°	210/60 -34°	220/58 -44°

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
BTM Butte, MT	departure	IFR Sky: overcast at 1,600 feet Weather: light snow, mist	from the northwest (320°) at 7 knots, gusting to 15	1.5 mi	1,600 ft	5,550 ft	8:03 pm MDT (02:03 UTC)
DLN Dillon, MT	40 nm out, 7 nm southeast of the line	low IFR Sky: a broken layer at 300 feet, overcast at 800 feet Weather: light snow, mist	from the north-northeast (030°) at 4 knots	1 mi	300 ft	5,244 ft	02:06 UTC
AOC Arco, ID	149 nm out, 6 nm northwest of the line	no report just now				5,334 ft
BYI Burley, ID	208 nm out, 12 nm west of the line	VFR Sky: a broken layer at 5,000 feet	from the south-southwest (210°) at 4 knots	10+ mi	5,000 ft	4,153 ft	01:53 UTC
ENV Wendover, UT	317 nm out, 4 nm southwest of the line	VFR Sky: a broken layer at 10,000 feet	from the southeast (130°) at 5 knots	10+ mi	10,000 ft	4,236 ft	01:56 UTC
ELY Ely, NV	416 nm out, 22 nm west of the line	VFR	from the south (170°) at 14 knots, gusting to 21	10+ mi	none	6,259 ft	01:53 UTC
LAS Las Vegas, NV	destination	VFR Sky: a few clouds at 5,000 feet, a few clouds at 8,500 feet, a broken layer at 10,000 feet, a broken layer at 15,000 feet	from the south-southeast (150°) at 8 knots, gusting to 21	10+ mi	10,000 ft	2,183 ft	6:56 pm PDT (01:56 UTC)

The highest airport on this list sits at 6,259 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At LAS when you get there the forecast at the estimated arrival, 12:41 am PDT (07:41 UTC)

Wind from the south at 12 knots, gusting to 20, visibility more than 6 miles, a few clouds at 8,000 feet, a broken layer at 10,000 feet VFR

The whole forecast for LAS

From Sun 5:00 pm PDT (00:00 UTC): wind from the south-southwest at 14 knots, gusting to 24, visibility more than 6 miles, showers nearby, a few clouds at 6,000 feet, scattered clouds at 8,000 feet and more above
From Sun 8:00 pm PDT (03:00 UTC): wind from the south at 12 knots, gusting to 20, visibility more than 6 miles, a few clouds at 8,000 feet, a broken layer at 10,000 feet
From Mon 1:00 am PDT (08:00 UTC): wind from the south at 7 knots, visibility more than 6 miles, a few clouds at 8,000 feet, a broken layer at 10,000 feet
From Mon 8:00 am PDT (15:00 UTC): wind from the south at 8 knots, visibility more than 6 miles, showers nearby, scattered clouds at 7,000 feet, a broken layer at 10,000 feet
From Mon 12:00 pm PDT (19:00 UTC): wind from the south-southwest at 15 knots, gusting to 25, visibility more than 6 miles, showers nearby, scattered clouds at 7,000 feet, a broken layer at 12,000 feet
From Mon 8:00 pm PDT (03:00 UTC): wind from the southwest at 10 knots, visibility more than 6 miles, a few clouds at 8,000 feet, scattered clouds at 10,000 feet

The forecast for BTM, the departure

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

Temporary flight restrictions on the line or within 25 nm of it

6/8890 LAS VEGAS, NV, Tuesday, October 13, 2026 Local on the route, 575 nm along the route · a VIP movement · starts tomorrow · ZLA
6/8808 Las Vegas, NV, Tuesday, October 13, 2026 Local on the route, at the destination end · security · starts tomorrow · ZLA

Daylight

Sunset at BTM 6:49 pm MDT (00:49 UTC), at LAS 6:08 pm PDT (01:08 UTC) (civil twilight ends 6:34 pm PDT (01:34 UTC)). At 120 knots the arrival at LAS is before sunrise there (6:44 am PDT (13:44 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

Radar now, the northern Rockies · loop National Weather Service

Radar now, the Pacific Northwest · loop National Weather Service

Radar now, the southern Rockies · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

Forecast chart, 24 hours ahead Weather Prediction Center

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: Bert Mooney Airport, Harry Reid International.