Billings Logan International to Willow Run Airport BIL → YIP
1,096 nautical miles (1,261 statute miles) east on a straight line, true course 092°, about 082° magnetic at the departure end (variation 10E). At 120 knots that is 5 h 52 min at the quickest height in today's winds (39,000 ft, a 67-knot tailwind), arriving about 4:02 am EDT (08:02 UTC), after sunset at the destination. 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 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 8W: thunderstorms (a convective SIGMET) up to 35,000 ft, moving from the southwest at 40 knots, until 9:55 pm MDT (03:55 UTC). Near the route, 60 nm along the route.
as issued
WSUS33 KKCI 120155 MKCW WST 120155 CONVECTIVE SIGMET 8W VALID UNTIL 0355Z CO MT WY FROM 40N SHR-60WNW RAP-20ENE CYS-30SW CYS-10NW BOY-40N SHR AREA TS MOV FROM 22040KT. TOPS TO FL350.
- 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 339 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the first 279 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 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 first 30 nm of the route.
- AIRMET ZULU 3C: moderate icing up to 22,000 ft. Near the route, at the departure end.
- 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 route from 498 to 518 nm out.
- AIRMET TANGO 3W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Near the route, 638 nm along the route.
- AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the last 10 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 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 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 11 forecast points nearest it (BIL, MLS, DIK, PIR, ABR, AXN, MSP, LSE, GRB, MKG, FWA). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 3,500 ft | 240° at 8 kt | −5 kt | 125 kt | 8 h 46 min | 6:56 am EDT (10:56 UTC) | |
| 5,500 ft | 220° at 6 kt | −3 kt | 7 °C | 123 kt | 8 h 55 min | 7:05 am EDT (11:05 UTC) |
| 7,500 ft | 230° at 9 kt | −7 kt | 12 °C | 127 kt | 8 h 38 min | 6:48 am EDT (10:48 UTC) |
| 9,500 ft | 240° at 13 kt | −11 kt | 8 °C | 131 kt | 8 h 22 min | 6:32 am EDT (10:32 UTC) |
| 11,500 ft | 240° at 17 kt | −14 kt | 4 °C | 134 kt | 8 h 11 min | 6:21 am EDT (10:21 UTC) |
| 13,500 ft | 240° at 20 kt | −18 kt | 0 °C | 138 kt | 7 h 57 min | 6:07 am EDT (10:07 UTC) |
| 15,500 ft | 250° at 24 kt | −22 kt | -4 °C | 142 kt | 7 h 43 min | 5:53 am EDT (09:53 UTC) |
| 17,500 ft | 250° at 27 kt | −26 kt | -9 °C | 146 kt | 7 h 30 min | 5:40 am EDT (09:40 UTC) |
| 18,000 ft FL180 | 250° at 28 kt | −27 kt | -10 °C | 147 kt | 7 h 27 min | 5:37 am EDT (09:37 UTC) |
| 24,000 ft FL240 | 260° at 34 kt | −34 kt | -21 °C | 154 kt | 7 h 07 min | 5:17 am EDT (09:17 UTC) |
| 30,000 ft FL300 | 270° at 36 kt | −38 kt | -36 °C | 158 kt | 6 h 56 min | 5:06 am EDT (09:06 UTC) |
| 34,000 ft FL340 | 270° at 45 kt | −46 kt | -45 °C | 166 kt | 6 h 36 min | 4:46 am EDT (08:46 UTC) |
| 39,000 ft FL390 | 270° at 65 kt | −67 kt | -51 °C | 187 kt | 5 h 52 min | 4:02 am EDT (08:02 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| BIL | used from 0 nm out; 25 nm from the line | 080/24 | 130/14 -1° | 180/33 0° | 210/43 -10° | 220/58 -21° | 200/55 -36° | 220/75 -44° | 240/83 -48° | |
| MLS | used from 50 nm out; 55 nm from the line | 120/22 5° | 170/18 4° | 200/33 1° | 230/49 -10° | 230/58 -21° | 220/54 -37° | 230/64 -44° | 250/74 -49° | |
| DIK | used from 199 nm out; 78 nm from the line | 110/15 6° | 200/17 5° | 230/31 1° | 240/47 -10° | 240/52 -20° | 230/52 -36° | 240/57 -45° | 250/67 -51° | |
| PIR | used from 299 nm out; 62 nm from the line | L/V 17° | 230/13 12° | 220/22 6° | 250/31 -9° | 250/34 -21° | 240/50 -35° | 230/61 -43° | 240/62 -51° | |
| ABR | used from 349 nm out; 56 nm from the line | 030/24 | 220/5 16° | 230/18 12° | 230/32 5° | 240/38 -10° | 250/37 -20° | 240/40 -35° | 240/56 -44° | 250/72 -52° |
| AXN | used from 498 nm out; 74 nm from the line | L/V | 220/23 17° | 230/24 12° | 240/25 5° | 260/32 -11° | 260/40 -21° | 270/50 -35° | 270/57 -45° | 270/81 -55° |
| MSP | used from 598 nm out; 40 nm from the line | 200/28 | 240/30 19° | 240/24 12° | 240/17 5° | 270/24 -10° | 270/33 -20° | 280/48 -35° | 290/55 -45° | 280/84 -54° |
| LSE | used from 698 nm out; 22 nm from the line | 220/33 | 250/29 17° | 250/15 9° | 260/12 6° | 280/21 -9° | 280/33 -20° | 300/43 -36° | 310/56 -45° | 300/79 -53° |
| GRB | used from 797 nm out; 77 nm from the line | 240/24 | 260/18 16° | 270/20 11° | 290/14 4° | 280/24 -9° | 300/34 -21° | 310/51 -38° | 310/54 -48° | 300/71 -51° |
| MKG | used from 897 nm out; 46 nm from the line | 250/5 | 320/10 15° | 310/19 9° | 320/21 3° | 310/23 -10° | 330/37 -22° | 330/51 -38° | 320/44 -47° | 300/60 -49° |
| FWA | used from 1046 nm out; 98 nm from the line | 350/9 | 350/24 15° | 360/25 9° | 360/29 4° | 350/31 -10° | 340/39 -22° | 330/40 -37° | 320/38 -43° | 320/48 -48° |
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 | no report just now | 3,662 ft | ||||
| MBG Mobridge, SD | 339 nm out, 15 nm north of the line | no report just now | 1,716 ft | ||||
| GDB Granite Falls, MN | 548 nm out, 5 nm northeast of the line | no report just now | 1,047 ft | ||||
| FBL Faribault, MN | 648 nm out, 3 nm southeast of the line | no report just now | 1,060 ft | ||||
| CMY Sparta, WI | 767 nm out, 5 nm northwest of the line, tower | no report just now | 839 ft | ||||
| UNU Juneau, WI | 857 nm out, 3 nm south of the line | no report just now | 934 ft | ||||
| MWC Milwaukee, WI | 887 nm out, 13 nm south of the line, tower | no report just now | 744 ft | ||||
| GRR Grand Rapids, MI | 996 nm out, 8 nm northeast of the line, tower | no report just now | 793 ft | ||||
| YIP Detroit, MI | destination | no report just now | 715 ft |
The highest airport on this list sits at 3,662 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At YIP when you get there the forecast at the estimated arrival, 4:02 am EDT (08:02 UTC)
YIP has no terminal forecast; use the nearest airport that does.
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 YIP 6:57 pm EDT (22:57 UTC) (civil twilight ends 7:25 pm EDT (23:25 UTC)). At 120 knots the arrival at YIP is before sunrise there (7:43 am EDT (11:43 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, Willow Run Airport.