Greenville Spartanburg International to Bozeman Yellowstone International GSP → BZN
1,465 nautical miles (1,686 statute miles) northwest on a straight line, true course 305°, about 311° magnetic at the departure end (variation 6W). At 120 knots that is 12 h 44 min at the quickest height in today's winds (4,500 ft, a 5-knot headwind), arriving about 9:47 am MDT (15:47 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
- AIRMET TANGO 5W: moderate turbulence below 18,000 ft (due to mountain wave) up to 10,000 ft. Over the route from 10 to 60 nm out.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 30 to 160 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 120 to 179 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 638 to 837 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 429 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 1087 to 1276 nm out.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 1216 to 1416 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). Near the route, 1286 nm along the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 1296 to 1396 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 169 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 20,000 ft. Over the last 50 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 destination end.
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 GSP.
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 14 forecast points nearest it (GSP, TYS, BNA, EVV, STL, COU, DSM, OMA, ONL, PIR, RAP, MLS, BIL, DLN). 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 14 kt | +5 kt | 15 °C | 115 kt | 12 h 44 min | 9:47 am MDT (15:47 UTC) |
| 6,500 ft | 230° at 12 kt | +6 kt | 15 °C | 114 kt | 12 h 51 min | 9:54 am MDT (15:54 UTC) |
| 8,500 ft | 250° at 13 kt | +9 kt | 11 °C | 111 kt | 13 h 12 min | 10:15 am MDT (16:15 UTC) |
| 10,500 ft | 250° at 15 kt | +11 kt | 7 °C | 109 kt | 13 h 26 min | 10:29 am MDT (16:29 UTC) |
| 12,500 ft | 240° at 17 kt | +12 kt | 4 °C | 108 kt | 13 h 34 min | 10:37 am MDT (16:37 UTC) |
| 14,500 ft | 250° at 19 kt | +14 kt | -1 °C | 106 kt | 13 h 49 min | 10:52 am MDT (16:52 UTC) |
| 16,500 ft | 250° at 21 kt | +17 kt | -5 °C | 103 kt | 14 h 13 min | 11:16 am MDT (17:16 UTC) |
| 18,000 ft FL180 | 250° at 23 kt | +18 kt | -8 °C | 102 kt | 14 h 22 min | 11:25 am MDT (17:25 UTC) |
| 24,000 ft FL240 | 260° at 25 kt | +21 kt | -20 °C | 99 kt | 14 h 48 min | 11:51 am MDT (17:51 UTC) |
| 30,000 ft FL300 | 260° at 33 kt | +29 kt | -34 °C | 91 kt | 16 h 06 min | 1:09 pm MDT (19:09 UTC) |
| 34,000 ft FL340 | 270° at 47 kt | +44 kt | -40 °C | 76 kt | 19 h 17 min | 4:20 pm MDT (22:20 UTC) |
| 39,000 ft FL390 | 270° at 48 kt | +46 kt | -48 °C | 74 kt | 19 h 48 min | 4:51 pm MDT (22:51 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| GSP | used from 0 nm out; 25 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° |
| TYS | used from 50 nm out; 28 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° |
| BNA | used from 199 nm out; 61 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° |
| EVV | used from 249 nm out; 46 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° |
| STL | used from 399 nm out; 36 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° |
| COU | used from 498 nm out; 58 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° |
| DSM | used from 598 nm out; 70 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° |
| OMA | used from 698 nm out; 28 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° |
| ONL | used from 798 nm out; 71 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° | |
| PIR | used from 997 nm out; 81 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° | |
| RAP | used from 1047 nm out; 38 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° | |
| MLS | used from 1196 nm out; 116 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° | |
| BIL | used from 1246 nm out; 97 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° | |
| DLN | used from 1446 nm out; 74 nm from the line | 090/6 -6° | 240/22 -4° | 210/34 -16° | 210/62 -25° | 210/66 -34° | 210/82 -36° | 220/77 -42° |
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 |
|---|---|---|---|---|---|---|---|
| GSP Greer, SC | departure | no report just now | 963 ft | ||||
| TYS Knoxville, TN | 100 nm out, 5 nm west of the line, tower | no report just now | 986 ft | ||||
| OWB Owensboro, KY | 289 nm out, 10 nm north of the line, tower | no report just now | 407 ft | ||||
| EVV Evansville, IN | 319 nm out, 15 nm northeast of the line, tower | no report just now | 421 ft | ||||
| ALN Alton/St Louis, IL | 449 nm out, 4 nm south of the line, tower | no report just now | 543 ft | ||||
| CRZ Corning, IA | 698 nm out, 2 nm northeast of the line | no report just now | 1,274 ft | ||||
| OMA Omaha, NE | 748 nm out, 6 nm southwest of the line, tower | no report just now | 984 ft | ||||
| ONL O'Neill, NE | 897 nm out, 5 nm east of the line | no report just now | 2,033 ft | ||||
| RAP Rapid City, SD | 1107 nm out, 14 nm north of the line, tower | no report just now | 3,203 ft | ||||
| SHR Sheridan, WY | 1276 nm out, 5 nm southwest of the line | no report just now | 4,021 ft | ||||
| LVM Livingston, MT | 1436 nm out, 4 nm north of the line | no report just now | 4,659 ft | ||||
| BZN Bozeman, MT | destination | no report just now | 4,473 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 BZN when you get there the forecast at the estimated arrival, 9:47 am MDT (15:47 UTC)
BZN 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 GSP 6:58 pm EDT (22:58 UTC), at BZN 6:44 pm MDT (00:44 UTC) (civil twilight ends 7:14 pm MDT (01:14 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: Greenville Spartanburg International, Bozeman Yellowstone International.