Harry Reid International to Great Falls International LAS → GTF
705 nautical miles (811 statute miles) north on a straight line, true course 013°, about 002° magnetic at the departure end (variation 11E). At 120 knots that is 3 h 45 min at the quickest height in today's winds (34,000 ft, a 68-knot tailwind), arriving about 11:29 pm MDT (05:29 UTC), after sunset at the destination. Right now LAS is VFR, wind from the south (190°) at 12 knots; GTF is low IFR, wind from the north-northeast (020°) 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: 223 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 3C: moderate icing up to 22,000 ft. Over the first 546 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 248 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 695 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the last 685 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 40 to 99 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 298 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 16,000 ft. Over the last 109 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 LAS.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B738 at 33,000 ft, 26 nm east, 4:57 pm PDT (23:57 UTC): moderate chop turbulence from 31,000 ft to 33,000 ft. 526 nm along the route, 26 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
- G280 at 41,000 ft, 35 nm southwest, 4:37 pm PDT (23:37 UTC): light to moderate clear-air turbulence, remarks: ZDVWC-46. At the departure 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
- B752 at 17,500 ft, 38 nm east, 3:48 pm PDT (22:48 UTC): a broken layer from 17,500 ft to 18,500 ft; overcast, remarks: layer of precip west of niitz 25 nautical miles lgt-hvy rain zlawc. At the departure end, 38 nm east of the line.
as filed, and in English
LAS UA /OV BLD065025/TM 2248/FL175/TP B752/SK BKN175-TOP185/OVC/RM LAYER OF PRECIP W OF NIITZ 25 NM LGT-HVY RAIN /ZLAWC AWC-WEB
- Report
- a routine report filed through LAS
- Where
- BLD065025 C
- Time
- 22:48 UTC
- Height
- at 17,500 ft
- Aircraft
- B752
- Sky
- a broken layer from 17,500 ft, tops 18,500 ft
- Remarks
- layer of precip west of niitz 25 nautical miles lgt-hvy rain zlawc
- B737 at 24,000 ft, 45 nm east, 4:29 pm PDT (23:29 UTC): light rime icing, -21 °C, remarks: during the descent during the descent choww arv zlawc. 40 nm along the route, 45 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
- E75L descending, 36 nm east, 6:04 pm PDT (01:04 UTC): remarks: had the airport in sight at 400-500FT above ground. 606 nm along the route, 36 nm east 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
- B737 descending, 36 nm east, 5:28 pm PDT (00:28 UTC): scattered clouds above 8,000 ft, fog, snow, remarks: broke out about 100FT above mins. 606 nm along the route, 36 nm east of the line.
as filed, and in English
BZN UA /OV BZN/TM 0028/FLDURD/TP B737/SK SCT080/WX 1/2SM SN FG/RM BROKE OUT ABOUT 100FT ABOVE MINS
- Report
- a routine report filed through BZN
- Where
- over BZN
- Time
- 00:28 UTC
- Height
- during the descent
- Aircraft
- B737
- Sky
- scattered clouds from 8,000 ft
- Weather
- 1/2SM, snow, fog
- Remarks
- broke out about 100FT above mins
- B738 at 24,000 ft, 7 nm northeast, 4:13 pm PDT (23:13 UTC): remarks: snow top flight level at 24,000 ft zlc. 606 nm along the route, 7 nm northeast 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
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 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 6 forecast points nearest it (LAS, ELY, SLC, PIH, DLN, GTF). 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 | 220° at 7 kt | −6 kt | 11 °C | 126 kt | 5 h 36 min | 1:20 am MDT (07:20 UTC) |
| 7,500 ft | 210° at 9 kt | −9 kt | 3 °C | 129 kt | 5 h 28 min | 1:12 am MDT (07:12 UTC) |
| 9,500 ft | 220° at 11 kt | −11 kt | 1 °C | 131 kt | 5 h 23 min | 1:07 am MDT (07:07 UTC) |
| 11,500 ft | 220° at 16 kt | −14 kt | -1 °C | 134 kt | 5 h 16 min | 1:00 am MDT (07:00 UTC) |
| 13,500 ft | 220° at 22 kt | −20 kt | -5 °C | 140 kt | 5 h 02 min | 12:46 am MDT (06:46 UTC) |
| 15,500 ft | 210° at 28 kt | −27 kt | -8 °C | 147 kt | 4 h 48 min | 12:32 am MDT (06:32 UTC) |
| 17,500 ft | 210° at 35 kt | −34 kt | -12 °C | 154 kt | 4 h 35 min | 12:19 am MDT (06:19 UTC) |
| 18,000 ft FL180 | 210° at 36 kt | −35 kt | -13 °C | 155 kt | 4 h 33 min | 12:17 am MDT (06:17 UTC) |
| 24,000 ft FL240 | 200° at 54 kt | −53 kt | -23 °C | 173 kt | 4 h 05 min | 11:49 pm MDT (05:49 UTC) |
| 30,000 ft FL300 | 210° at 69 kt | −67 kt | -31 °C | 187 kt | 3 h 46 min | 11:30 pm MDT (05:30 UTC) |
| 34,000 ft FL340 | 220° at 75 kt | −68 kt | -38 °C | 188 kt | 3 h 45 min | 11:29 pm MDT (05:29 UTC) |
| 39,000 ft FL390 | 230° at 71 kt | −60 kt | -44 °C | 180 kt | 3 h 55 min | 11:39 pm MDT (05:39 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 | 3,000 | 6,000 | 9,000 | 12,000 | 18,000 | 24,000 | 30,000 | 34,000 | 39,000 |
|---|---|---|---|---|---|---|---|---|---|---|
| LAS | used from 0 nm out; 25 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° | |
| ELY | used from 99 nm out; 73 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° | ||
| SLC | used from 298 nm out; 79 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° | |
| PIH | used from 348 nm out; 57 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° | |
| DLN | used from 496 nm out; 44 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° | ||
| GTF | used from 645 nm out; 35 nm from the line | 070/21 | 080/18 -6° | 120/5 -5° | 180/30 -14° | 200/53 -24° | 210/80 -38° | 220/83 -44° | 230/68 -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 |
|---|---|---|---|---|---|---|---|
| LAS Las Vegas, NV | departure | VFR Sky: a few clouds at 7,500 feet, scattered clouds at 10,000 feet, a broken layer at 15,000 feet | from the south (190°) at 12 knots | 10+ mi | 15,000 ft | 2,183 ft | 5:56 pm PDT (00:56 UTC) |
| ENV Wendover, UT | 288 nm out, 12 nm west of the line | VFR Sky: scattered clouds at 11,000 feet | from the east-southeast (110°) at 5 knots | 10+ mi | none | 4,236 ft | 00:56 UTC |
| PIH Pocatello, ID | 427 nm out, 20 nm east of the line, tower | VFR Sky: scattered clouds at 1,200 feet, a broken layer at 6,000 feet, overcast at 8,500 feet Weather: light rain | from the southwest (230°) at 9 knots | 10+ mi | 6,000 ft | 4,451 ft | 00:53 UTC |
| RVF Twin Bridges, MT | 586 nm out, 8 nm west of the line | IFR Sky: scattered clouds at 300 feet, a broken layer at 800 feet, a broken layer at 1,400 feet Weather: mist | from the north-northeast (030°) at 23 knots, gusting to 29 | 1 mi | 800 ft | 4,788 ft | 01:35 UTC |
| HLN Helena, MT | 645 nm out, 11 nm northwest of the line, tower | IFR Sky: scattered clouds at 700 feet, overcast at 1,400 feet Weather: light snow, mist | from the west (280°) at 8 knots | 1.25 mi | 1,400 ft | 3,877 ft | 01:36 UTC |
| GTF Great Falls, MT | destination | low IFR Sky: a broken layer at 400 feet, overcast at 800 feet Weather: light snow, mist | from the north-northeast (020°) at 10 knots | 0.75 mi | 400 ft | 3,680 ft | 7:08 pm MDT (01:08 UTC) |
The highest airport on this list sits at 4,788 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At GTF when you get there the forecast at the estimated arrival, 11:29 pm MDT (05:29 UTC)
Wind from the north-northeast at 12 knots, visibility ¾ mile, light snow, mist, a broken layer at 500 feet, overcast at 1,200 feet low IFR
The whole forecast for GTF
- From Sun 6:00 pm MDT (00:00 UTC): wind from the north-northeast at 12 knots, visibility ¾ mile, light snow, mist, a broken layer at 500 feet, overcast at 1,200 feet
- At times between Mon 12:00 am MDT (06:00 UTC) and 3:00 am MDT (09:00 UTC): visibility 2 miles, light snow, overcast at 600 feet
- From Mon 3:00 am MDT (09:00 UTC): wind from the north at 9 knots, visibility 3 miles, light snow, mist, overcast at 500 feet
- From Mon 9:00 am MDT (15:00 UTC): wind light and variable, visibility 6 miles, light snow, mist, a broken layer at 800 feet, overcast at 1,500 feet
- From Mon 3:00 pm MDT (21:00 UTC): wind light and variable, visibility more than 6 miles, a broken layer at 2,500 feet
The forecast for LAS, the departure
- 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
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, at the departure end · a VIP movement · starts tomorrow · ZLA
- 6/8808 Las Vegas, NV, Tuesday, October 13, 2026 Local on the route, at the departure end · security · starts tomorrow · ZLA
Daylight
Sunset at LAS 6:08 pm PDT (01:08 UTC), at GTF 6:43 pm MDT (00:43 UTC) (civil twilight ends 7:14 pm MDT (01:14 UTC)). At 120 knots the arrival at GTF is after sunset there (6:45 pm MDT (00:45 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: Harry Reid International, Great Falls International.