Billings Logan International to Nashville International BIL → BNA
1,144 nautical miles (1,316 statute miles) southeast on a straight line, true course 113°, about 103° magnetic at the departure end (variation 10E). At 120 knots that is 6 h 53 min at the quickest height in today's winds (39,000 ft, a 46-knot tailwind), arriving about 7:51 am CDT (12:51 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: 4 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 428 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the first 129 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Near the route, at the departure end.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 40 to 169 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 80 to 239 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the route from 90 to 209 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 438 to 815 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 last 40 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
No pilot reports within 50 nautical miles of the line in the last three hours.
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 12 forecast points nearest it (BIL, MLS, RAP, PIR, ONL, OMA, MKC, COU, STL, CGI, EVV, BNA). 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 | 230° at 28 kt | −10 kt | 130 kt | 8 h 48 min | 9:46 am CDT (14:46 UTC) | |
| 5,500 ft | 220° at 18 kt | −2 kt | 14 °C | 122 kt | 9 h 23 min | 10:21 am CDT (15:21 UTC) |
| 7,500 ft | 220° at 18 kt | −5 kt | 13 °C | 125 kt | 9 h 09 min | 10:07 am CDT (15:07 UTC) |
| 9,500 ft | 230° at 18 kt | −7 kt | 9 °C | 127 kt | 9 h | 9:58 am CDT (14:58 UTC) |
| 11,500 ft | 230° at 19 kt | −7 kt | 6 °C | 127 kt | 9 h | 9:58 am CDT (14:58 UTC) |
| 13,500 ft | 230° at 20 kt | −9 kt | 2 °C | 129 kt | 8 h 52 min | 9:50 am CDT (14:50 UTC) |
| 15,500 ft | 240° at 21 kt | −11 kt | -2 °C | 131 kt | 8 h 44 min | 9:42 am CDT (14:42 UTC) |
| 17,500 ft | 240° at 23 kt | −14 kt | -7 °C | 134 kt | 8 h 32 min | 9:30 am CDT (14:30 UTC) |
| 18,000 ft FL180 | 250° at 23 kt | −14 kt | -8 °C | 134 kt | 8 h 32 min | 9:30 am CDT (14:30 UTC) |
| 24,000 ft FL240 | 250° at 27 kt | −17 kt | -20 °C | 137 kt | 8 h 21 min | 9:19 am CDT (14:19 UTC) |
| 30,000 ft FL300 | 250° at 36 kt | −26 kt | -34 °C | 146 kt | 7 h 50 min | 8:48 am CDT (13:48 UTC) |
| 34,000 ft FL340 | 270° at 50 kt | −42 kt | -40 °C | 162 kt | 7 h 04 min | 8:02 am CDT (13:02 UTC) |
| 39,000 ft FL390 | 270° at 52 kt | −46 kt | -48 °C | 166 kt | 6 h 53 min | 7:51 am CDT (12:51 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| BIL | used from 0 nm out; 25 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 99 nm out; 87 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 149 nm out; 82 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 348 nm out; 78 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 398 nm out; 47 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 547 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° |
| MKC | used from 696 nm out; 68 nm from the line | 220/44 | 250/28 18° | 250/18 13° | 240/12 6° | 280/24 -6° | 240/34 -18° | 260/47 -30° | 260/51 -40° | 270/58 -50° |
| COU | used from 746 nm out; 68 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 895 nm out; 26 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° |
| CGI | used from 945 nm out; 37 nm from the line | 240/20 | 270/15 15° | 280/15 11° | 300/13 6° | 290/20 -6° | 280/24 -18° | 300/34 -32° | 300/47 -41° | 310/49 -51° |
| EVV | used from 1044 nm out; 73 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 1094 nm out; 25 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° |
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 | ||||
| SPF Spearfish, SD | 219 nm out, 11 nm north of the line | no report just now | 3,933 ft | ||||
| RAP Rapid City, SD | 259 nm out, 3 nm northwest of the line, tower | no report just now | 3,203 ft | ||||
| SUO Rosebud, SD | 358 nm out, 6 nm east of the line | no report just now | 2,724 ft | ||||
| ONL O'Neill, NE | 467 nm out, 9 nm northeast of the line | no report just now | 2,033 ft | ||||
| OMA Omaha, NE | 617 nm out, 13 nm north of the line, tower | no report just now | 984 ft | ||||
| CHT Chillicothe, MO | 756 nm out, 7 nm southwest of the line | no report just now | 783 ft | ||||
| SUS St Louis, MO | 905 nm out, 12 nm north of the line, tower | no report just now | 463 ft | ||||
| MDH Carbondale/Murphysboro, IL | 985 nm out, 6 nm northeast of the line, tower | no report just now | 411 ft | ||||
| CKV Clarksville, TN | 1094 nm out, 4 nm east of the line | no report just now | 549 ft | ||||
| BNA Nashville, TN | destination | no report just now | 599 ft |
The highest airport on this list sits at 3,933 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BNA when you get there the forecast at the estimated arrival, 7:51 am CDT (12:51 UTC)
BNA has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/7634 CENTRALIA, MO, Monday, October 12, 2026 UTC 4 nm from the route, 825 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZKC
- 6/0708 Goodlettsville, TN, Saturday, August 1, 2026 through Sunday, August 1, 2027 UTC 10 nm from the route, at the destination end · security · until 1 August · ZME
Daylight
Sunset at BIL 6:33 pm MDT (00:33 UTC), at BNA 6:15 pm CDT (23:15 UTC) (civil twilight ends 6:40 pm CDT (23:40 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, Nashville International.