Bozeman Yellowstone International to Austin-Bergstrom International BZN → AUS
1,129 nautical miles (1,299 statute miles) southeast on a straight line, true course 141°, about 128° magnetic at the departure end (variation 13E). At 120 knots that is 8 h 45 min at the quickest height in today's winds (39,000 ft, a 9-knot tailwind), arriving about 6:48 am CDT (11:48 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: 23 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 first 180 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 20,000 ft. Over the first 30 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 270 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 30 to 599 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 40 to 270 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 90 to 440 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 110 to 569 nm out.
- AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 250 to 250 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 400 to 400 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 599 to 689 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 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 10 forecast points nearest it (DLN, BIL, LND, RKS, DEN, PUB, AMA, LBB, ABI, SAT). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 7,500 ft | 210° at 23 kt | +9 kt | 11 °C | 111 kt | 10 h 10 min | 8:13 am CDT (13:13 UTC) |
| 9,500 ft | 220° at 22 kt | +6 kt | 10 °C | 114 kt | 9 h 54 min | 7:57 am CDT (12:57 UTC) |
| 11,500 ft | 230° at 27 kt | +2 kt | 6 °C | 118 kt | 9 h 34 min | 7:37 am CDT (12:37 UTC) |
| 13,500 ft | 230° at 29 kt | +3 kt | 2 °C | 117 kt | 9 h 39 min | 7:42 am CDT (12:42 UTC) |
| 15,500 ft | 230° at 31 kt | +5 kt | -2 °C | 115 kt | 9 h 49 min | 7:52 am CDT (12:52 UTC) |
| 17,500 ft | 220° at 33 kt | +7 kt | -7 °C | 113 kt | 9 h 59 min | 8:02 am CDT (13:02 UTC) |
| 18,000 ft FL180 | 220° at 33 kt | +8 kt | -8 °C | 112 kt | 10 h 05 min | 8:08 am CDT (13:08 UTC) |
| 24,000 ft FL240 | 230° at 38 kt | +4 kt | -19 °C | 116 kt | 9 h 44 min | 7:47 am CDT (12:47 UTC) |
| 30,000 ft FL300 | 230° at 51 kt | +3 kt | -29 °C | 117 kt | 9 h 39 min | 7:42 am CDT (12:42 UTC) |
| 34,000 ft FL340 | 240° at 53 kt | −2 kt | -37 °C | 122 kt | 9 h 15 min | 7:18 am CDT (12:18 UTC) |
| 39,000 ft FL390 | 250° at 48 kt | −9 kt | -47 °C | 129 kt | 8 h 45 min | 6:48 am CDT (11:48 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| DLN | used from 0 nm out; 76 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° | ||
| BIL | used from 50 nm out; 88 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° | |
| LND | used from 100 nm out; 84 nm from the line | 200/23 6° | 220/31 1° | 220/39 -11° | 230/39 -23° | 220/51 -28° | 220/66 -37° | 230/68 -45° | ||
| RKS | used from 300 nm out; 109 nm from the line | 200/41 | 220/44 1° | 220/35 -11° | 220/46 -24° | 210/53 -27° | 220/62 -35° | 230/61 -44° | ||
| DEN | used from 350 nm out; 82 nm from the line | 240/21 14° | 250/44 6° | 220/49 -8° | 220/49 -21° | 230/54 -30° | 240/57 -35° | 240/49 -45° | ||
| PUB | used from 500 nm out; 31 nm from the line | 230/25 13° | 230/32 6° | 220/44 -8° | 230/49 -21° | 240/70 -28° | 240/67 -34° | 240/58 -46° | ||
| AMA | used from 649 nm out; 92 nm from the line | 210/38 | 230/29 14° | 240/29 7° | 220/27 -5° | 240/37 -18° | 240/66 -28° | 250/59 -37° | 260/47 -49° | |
| LBB | used from 849 nm out; 79 nm from the line | 200/36 18° | 220/19 15° | 240/20 8° | 230/24 -4° | 240/37 -16° | 250/57 -28° | 250/51 -38° | 270/47 -50° | |
| ABI | used from 899 nm out; 43 nm from the line | 200/31 17° | 210/21 15° | 240/15 9° | 250/14 -4° | 250/24 -14° | 250/36 -28° | 270/35 -38° | 290/41 -50° | |
| SAT | used from 1049 nm out; 88 nm from the line | 150/26 | 180/18 19° | 180/18 14° | 200/14 9° | 230/16 -6° | 210/9 -13° | 270/8 -29° | 280/6 -39° | 340/19 -51° |
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 | 20 nm out, 20 nm northeast of the line | no report just now | 4,659 ft | ||||
| RIW Riverton, WY | 200 nm out, 8 nm southwest of the line | no report just now | 5,516 ft | ||||
| SAA Saratoga, WY | 320 nm out, 8 nm southwest of the line | no report just now | 7,014 ft | ||||
| BJC Denver, CO | 440 nm out, 3 nm east of the line, tower | no report just now | 5,673 ft | ||||
| APA Denver, CO | 470 nm out, 5 nm north of the line, tower | no report just now | 5,884 ft | ||||
| LHX La Junta, CO | 579 nm out, 5 nm north of the line | no report just now | 4,228 ft | ||||
| AMA Amarillo, TX | 769 nm out, 17 nm west of the line, tower | no report just now | 3,606 ft | ||||
| CDS Childress, TX | 839 nm out, 17 nm east of the line | no report just now | 1,953 ft | ||||
| ABI Abilene, TX | 959 nm out, 21 nm southwest of the line, tower | no report just now | 1,790 ft | ||||
| GTU Georgetown, TX | 1099 nm out, 15 nm east of the line, tower | no report just now | 789 ft | ||||
| AUS Austin, TX | destination | no report just now | 541 ft |
The highest airport on this list sits at 7,014 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At AUS when you get there the forecast at the estimated arrival, 6:48 am CDT (11:48 UTC)
AUS has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/8770 COLORADO SPRINGS, CO, Saturday, October 10, 2026 through Monday, October 12, 2026 UTC 21 nm from the route, 490 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 12 October · ZDV
- 6/5849 Austin, TX, Friday, October 2, 2026 through Monday, October 12, 2026 UTC 3 nm from the route, at the destination end · drones kept away from a public gathering · until 12 October · ZHU
Daylight
Sunset at BZN 6:44 pm MDT (00:44 UTC), at AUS 7:03 pm CDT (00:03 UTC) (civil twilight ends 7:27 pm CDT (00:27 UTC)). At 120 knots the arrival at AUS is before sunrise there (7:30 am CDT (12:30 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, Austin-Bergstrom International.