Bozeman Yellowstone International to Greenville Spartanburg International BZN → GSP
1,465 nautical miles (1,686 statute miles) east on a straight line, true course 106°, about 093° magnetic at the departure end (variation 13E). At 120 knots that is 8 h 50 min at the quickest height in today's winds (39,000 ft, a 46-knot tailwind), arriving about 10:06 am EDT (14:06 UTC). 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 8C: thunderstorms (a convective SIGMET) up to 32,000 ft, moving from the southwest at 40 knots, until 12:55 am MDT (06:55 UTC). Over the route from 309 to 339 nm out.
as issued
WSUS32 KKCI 120455 MKCC WST 120455 CONVECTIVE SIGMET 8C VALID UNTIL 0655Z NE SD WY FROM 50WNW RAP-20SSW RAP-60NW BFF-40ENE DDY-50WNW RAP DMSHG AREA TS MOV FROM 22040KT. TOPS TO FL320.
- 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 528 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the first 70 nm of the route.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Near the route, at the departure end.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 179 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 80 to 239 nm out.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 120 to 279 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the route from 140 to 339 nm out.
- 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 169 to 349 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). Over the route from 558 to 917 nm out.
- 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 route from 1156 to 1416 nm out.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1316 to 1426 nm out.
- AIRMET TANGO 5W: moderate turbulence above 18,000 ft (due to mountain wave) from 29,000 ft to 40,000 ft. Over the route from 1386 to 1455 nm out.
- AIRMET TANGO 5W: moderate turbulence below 18,000 ft (due to mountain wave) up to 10,000 ft. Over the last 60 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 BZN.
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 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 13 forecast points nearest it (BIL, MLS, RAP, PIR, ONL, OMA, DSM, COU, STL, EVV, BNA, TYS, GSP). 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 | 250° at 21 kt | −15 kt | 135 kt | 10 h 51 min | 12:07 pm EDT (16:07 UTC) | |
| 5,500 ft | 230° at 12 kt | −5 kt | 14 °C | 125 kt | 11 h 43 min | 12:59 pm EDT (16:59 UTC) |
| 7,500 ft | 240° at 13 kt | −7 kt | 13 °C | 127 kt | 11 h 32 min | 12:48 pm EDT (16:48 UTC) |
| 9,500 ft | 240° at 15 kt | −10 kt | 8 °C | 130 kt | 11 h 16 min | 12:32 pm EDT (16:32 UTC) |
| 11,500 ft | 240° at 17 kt | −11 kt | 6 °C | 131 kt | 11 h 11 min | 12:27 pm EDT (16:27 UTC) |
| 13,500 ft | 240° at 19 kt | −13 kt | 1 °C | 133 kt | 11 h 01 min | 12:17 pm EDT (16:17 UTC) |
| 15,500 ft | 250° at 21 kt | −16 kt | -3 °C | 136 kt | 10 h 46 min | 12:02 pm EDT (16:02 UTC) |
| 17,500 ft | 250° at 23 kt | −18 kt | -7 °C | 138 kt | 10 h 37 min | 11:53 am EDT (15:53 UTC) |
| 18,000 ft FL180 | 250° at 23 kt | −19 kt | -8 °C | 139 kt | 10 h 32 min | 11:48 am EDT (15:48 UTC) |
| 24,000 ft FL240 | 260° at 25 kt | −21 kt | -20 °C | 141 kt | 10 h 23 min | 11:39 am EDT (15:39 UTC) |
| 30,000 ft FL300 | 260° at 33 kt | −29 kt | -34 °C | 149 kt | 9 h 50 min | 11:06 am EDT (15:06 UTC) |
| 34,000 ft FL340 | 270° at 47 kt | −45 kt | -40 °C | 165 kt | 8 h 53 min | 10:09 am EDT (14:09 UTC) |
| 39,000 ft FL390 | 270° at 48 kt | −46 kt | -48 °C | 166 kt | 8 h 50 min | 10:06 am EDT (14:06 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; 86 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° | |
| MLS | used from 199 nm out; 109 nm from the line | 150/23 2° | 190/29 4° | 210/44 2° | 220/32 -10° | 210/36 -21° | 200/48 -37° | 230/63 -40° | 240/71 -47° | |
| RAP | used from 249 nm out; 86 nm from the line | 180/23 12° | 200/38 13° | 210/38 6° | 220/28 -10° | 230/34 -21° | 230/37 -36° | 250/52 -38° | 250/59 -46° | |
| PIR | used from 449 nm out; 80 nm from the line | 170/22 19° | 190/25 13° | 210/32 6° | 240/23 -9° | 250/32 -21° | 250/38 -36° | 260/44 -40° | 260/52 -47° | |
| ONL | used from 498 nm out; 49 nm from the line | 210/31 20° | 230/27 13° | 230/18 7° | 220/19 -8° | 240/26 -20° | 250/44 -35° | 270/52 -39° | 260/57 -47° | |
| OMA | used from 648 nm out; 42 nm from the line | 220/47 | 240/33 19° | 250/18 11° | 230/17 6° | 260/29 -8° | 250/33 -19° | 250/51 -33° | 260/61 -40° | 270/62 -49° |
| DSM | used from 798 nm out; 59 nm from the line | 230/40 | 250/33 17° | 250/18 12° | 240/17 5° | 260/28 -8° | 270/34 -19° | 260/41 -33° | 260/55 -41° | 270/62 -51° |
| COU | used from 847 nm out; 84 nm from the line | 230/31 | 230/30 15° | 260/16 11° | 270/14 6° | 260/24 -6° | 270/27 -18° | 270/37 -32° | 280/49 -41° | 290/56 -51° |
| STL | used from 947 nm out; 43 nm from the line | 250/24 | 250/24 16° | 260/23 9° | 270/16 6° | 260/25 -6° | 270/29 -19° | 290/34 -33° | 290/48 -41° | 290/54 -51° |
| EVV | used from 1097 nm out; 30 nm from the line | 280/15 | 290/12 17° | 310/16 10° | 320/13 5° | 310/22 -6° | 320/26 -18° | 320/38 -33° | 310/56 -41° | 320/55 -51° |
| BNA | used from 1196 nm out; 64 nm from the line | 310/20 | 340/20 17° | 330/24 10° | 340/22 5° | 330/26 -6° | 340/29 -18° | 330/52 -33° | 320/62 -41° | 340/45 -50° |
| TYS | used from 1296 nm out; 42 nm from the line | 320/20 | 340/18 11° | 340/32 9° | 340/36 4° | 330/37 -7° | 330/38 -19° | 330/50 -34° | 330/53 -38° | 330/44 -48° |
| GSP | used from 1396 nm out; 45 nm from the line | 320/22 | 340/19 13° | 320/18 8° | 310/24 5° | 300/34 -7° | 300/36 -18° | 290/30 -33° | 300/32 -39° | 320/42 -49° |
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 |
|---|---|---|---|---|---|---|---|
| BZN Bozeman, MT | departure | no report just now | 4,473 ft | ||||
| LVM Livingston, MT | 30 nm out, 4 nm north of the line | no report just now | 4,659 ft | ||||
| SHR Sheridan, WY | 189 nm out, 5 nm southwest of the line | no report just now | 4,021 ft | ||||
| RAP Rapid City, SD | 359 nm out, 14 nm north of the line, tower | no report just now | 3,203 ft | ||||
| ONL O'Neill, NE | 568 nm out, 5 nm east of the line | no report just now | 2,033 ft | ||||
| OMA Omaha, NE | 718 nm out, 6 nm southwest of the line, tower | no report just now | 984 ft | ||||
| CRZ Corning, IA | 768 nm out, 2 nm northeast of the line | no report just now | 1,274 ft | ||||
| ALN Alton/St Louis, IL | 1017 nm out, 4 nm south of the line, tower | no report just now | 543 ft | ||||
| EVV Evansville, IN | 1146 nm out, 15 nm northeast of the line, tower | no report just now | 421 ft | ||||
| OWB Owensboro, KY | 1176 nm out, 10 nm north of the line, tower | no report just now | 407 ft | ||||
| TYS Knoxville, TN | 1366 nm out, 5 nm west of the line, tower | no report just now | 986 ft | ||||
| GSP Greer, SC | destination | no report just now | 963 ft |
The highest airport on this list sits at 4,659 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At GSP when you get there the forecast at the estimated arrival, 10:06 am EDT (14:06 UTC)
GSP 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 BZN 6:44 pm MDT (00:44 UTC), at GSP 6:58 pm EDT (22:58 UTC) (civil twilight ends 7:23 pm EDT (23:23 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: Bozeman Yellowstone International, Greenville Spartanburg International.