Billings Logan International to Havre City-County BIL → HVR
172 nautical miles (197 statute miles) north on a straight line, true course 344°, about 334° magnetic at the departure end (variation 10E). At 120 knots that is 1 h 04 min at the quickest height in today's winds (30,000 ft, a 41-knot tailwind), arriving about 12:16 am MDT (06:16 UTC), after sunset at the destination. Right now BIL is marginal VFR, wind from the north-northwest (340°) at 7 knots; HVR is IFR, wind from the northeast (040°) at 7 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: 1,322 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 SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the whole route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the first 0 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 29 to 105 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 BIL.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
Not fetched just now.
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 2 forecast points nearest it (BIL, 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 |
|---|---|---|---|---|---|---|
| 4,500 ft | 080° at 12 kt | −1 kt | 121 kt | 1 h 25 min | 12:37 am MDT (06:37 UTC) | |
| 6,500 ft | 080° at 11 kt | −1 kt | 121 kt | 1 h 25 min | 12:37 am MDT (06:37 UTC) | |
| 8,500 ft | 110° at 8 kt | −5 kt | 125 kt | 1 h 23 min | 12:35 am MDT (06:35 UTC) | |
| 10,500 ft | 170° at 13 kt | −13 kt | -4 °C | 133 kt | 1 h 18 min | 12:30 am MDT (06:30 UTC) |
| 12,500 ft | 190° at 23 kt | −20 kt | -5 °C | 140 kt | 1 h 14 min | 12:26 am MDT (06:26 UTC) |
| 14,500 ft | 200° at 28 kt | −22 kt | -8 °C | 142 kt | 1 h 13 min | 12:25 am MDT (06:25 UTC) |
| 16,500 ft | 210° at 34 kt | −24 kt | -10 °C | 144 kt | 1 h 12 min | 12:24 am MDT (06:24 UTC) |
| 18,000 ft FL180 | 210° at 38 kt | −26 kt | -12 °C | 146 kt | 1 h 11 min | 12:23 am MDT (06:23 UTC) |
| 24,000 ft FL240 | 210° at 41 kt | −30 kt | -22 °C | 150 kt | 1 h 09 min | 12:21 am MDT (06:21 UTC) |
| 30,000 ft FL300 | 210° at 56 kt | −41 kt | -37 °C | 161 kt | 1 h 04 min | 12:16 am MDT (06:16 UTC) |
| 34,000 ft FL340 | 230° at 70 kt | −32 kt | -39 °C | 152 kt | 1 h 08 min | 12:20 am MDT (06:20 UTC) |
| 39,000 ft FL390 | 230° at 74 kt | −35 kt | -45 °C | 155 kt | 1 h 07 min | 12:19 am MDT (06:19 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| BIL | used from 0 nm out; 24 nm from the line | 080/13 | 180/9 -2° | 210/38 0° | 220/51 -11° | 210/46 -22° | 210/58 -35° | 230/73 -39° | 230/72 -45° | |
| GTF | used from 95 nm out; 82 nm from the line | 070/11 | 080/15 -7° | 110/19 -9° | 190/25 -14° | 200/34 -23° | 200/54 -39° | 220/66 -40° | 220/77 -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 |
|---|---|---|---|---|---|---|---|
| BIL Billings, MT | departure | marginal VFR Sky: overcast at 1,200 feet Weather: light rain, light snow, mist | from the north-northwest (340°) at 7 knots | 4 mi | 1,200 ft | 3,662 ft | 10:53 pm MDT (04:53 UTC) |
| RPX Roundup, MT | 38 nm out, 11 nm east of the line | no report just now | 3,490 ft | ||||
| LWT Lewistown, MT | 86 nm out, 15 nm southwest of the line | no report just now | 4,170 ft | ||||
| HVR Havre, MT | destination | IFR Sky: overcast at 1,000 feet Weather: light snow, mist | from the northeast (040°) at 7 knots | 1.25 mi | 1,000 ft | 2,591 ft | 11:04 pm MDT (05:04 UTC) |
The highest airport on this list sits at 4,170 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At HVR when you get there the forecast at the estimated arrival, 12:16 am MDT (06:16 UTC)
Wind from the northeast at 12 knots, visibility 1½ miles, light snow, mist, overcast at 700 feet IFR
30% chance between Sun 9:00 pm MDT (03:00 UTC) and 3:00 am MDT (09:00 UTC): visibility ¾ mile, light snow, mist, overcast at 500 feet low IFR
The whole forecast for HVR
- From Sun 6:00 pm MDT (00:00 UTC): wind from the northeast at 13 knots, visibility 6 miles, light rain snow, mist, a broken layer at 600 feet, overcast at 2,500 feet
- From Sun 9:00 pm MDT (03:00 UTC): wind from the northeast at 12 knots, visibility 1½ miles, light snow, mist, overcast at 700 feet
- 30% chance between Sun 9:00 pm MDT (03:00 UTC) and 3:00 am MDT (09:00 UTC): visibility ¾ mile, light snow, mist, overcast at 500 feet
- From Mon 4:00 am MDT (10:00 UTC): wind from the northeast at 9 knots, visibility 3 miles, light snow, mist, overcast at 1,000 feet
- From Mon 11:00 am MDT (17:00 UTC): wind from the north-northwest at 6 knots, visibility 6 miles, mist, scattered clouds at 800 feet, overcast at 1,500 feet
- From Mon 2:00 pm MDT (20:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 900 feet, overcast at 2,500 feet
The forecast for BIL, the departure
- From Sun 8:00 pm MDT (02:00 UTC): wind from the north-northeast at 11 knots, visibility 3 miles, light snow, mist, overcast at 500 feet
- From Sun 9:00 pm MDT (03:00 UTC): wind from the north at 8 knots, visibility 2 miles, light snow, mist, freezing fog, a broken layer at 500 feet
- From Mon 8:00 am MDT (14:00 UTC): wind from the north-northwest at 5 knots, visibility 6 miles, mist, showers nearby, scattered clouds at 300 feet, a broken layer at 700 feet and more above
- From Mon 3:00 pm MDT (21:00 UTC): wind from the northeast at 6 knots, visibility 6 miles, mist, overcast at 1,500 feet
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 BIL 6:33 pm MDT (00:33 UTC), at HVR 6:35 pm MDT (00:35 UTC) (civil twilight ends 7:07 pm MDT (01:07 UTC)). At 120 knots the arrival at HVR is before sunrise there (7:34 am MDT (13:34 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: Billings Logan International, Havre City-County.