Bozeman Yellowstone International to General Edward Lawrence Logan International BZN → BOS
1,725 nautical miles (1,986 statute miles) east on a straight line, true course 082°, about 069° magnetic at the departure end (variation 13E). At 120 knots that is 9 h 26 min at the quickest height in today's winds (39,000 ft, a 63-knot tailwind), arriving about 5:14 am EDT (09:14 UTC), after sunset at the destination. Right now BZN is low IFR, wind calm; BOS is marginal VFR, wind from the southeast (130°) at 4 knots. 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: 395 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 349 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the first 329 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 130 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Near the route, 90 nm along the route.
- AIRMET ZULU 1C: moderate icing up to 24,000 ft. Over the last 259 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 259 nm of the route.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the last 259 nm of 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 route from 1476 to 1715 nm out.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1506 to 1646 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 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 13 forecast points nearest it (BIL, MLS, DIK, ABR, AXN, DLH, GRB, TVC, BUF, SYR, ALB, BDL, BOS). 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 | 190° at 9 kt | +1 kt | 119 kt | 14 h 30 min | 10:18 am EDT (14:18 UTC) | |
| 5,500 ft | 180° at 7 kt | +1 kt | 5 °C | 119 kt | 14 h 30 min | 10:18 am EDT (14:18 UTC) |
| 7,500 ft | 220° at 9 kt | −5 kt | 10 °C | 125 kt | 13 h 48 min | 9:36 am EDT (13:36 UTC) |
| 9,500 ft | 230° at 13 kt | −10 kt | 7 °C | 130 kt | 13 h 16 min | 9:04 am EDT (13:04 UTC) |
| 11,500 ft | 230° at 17 kt | −13 kt | 3 °C | 133 kt | 12 h 58 min | 8:46 am EDT (12:46 UTC) |
| 13,500 ft | 240° at 20 kt | −17 kt | -1 °C | 137 kt | 12 h 35 min | 8:23 am EDT (12:23 UTC) |
| 15,500 ft | 240° at 24 kt | −21 kt | -5 °C | 141 kt | 12 h 14 min | 8:02 am EDT (12:02 UTC) |
| 17,500 ft | 250° at 27 kt | −25 kt | -9 °C | 145 kt | 11 h 54 min | 7:42 am EDT (11:42 UTC) |
| 18,000 ft FL180 | 250° at 28 kt | −26 kt | -10 °C | 146 kt | 11 h 49 min | 7:37 am EDT (11:37 UTC) |
| 24,000 ft FL240 | 250° at 36 kt | −33 kt | -21 °C | 153 kt | 11 h 16 min | 7:04 am EDT (11:04 UTC) |
| 30,000 ft FL300 | 250° at 42 kt | −37 kt | -36 °C | 157 kt | 10 h 59 min | 6:47 am EDT (10:47 UTC) |
| 34,000 ft FL340 | 250° at 54 kt | −49 kt | -45 °C | 169 kt | 10 h 12 min | 6:00 am EDT (10:00 UTC) |
| 39,000 ft FL390 | 260° at 68 kt | −63 kt | -52 °C | 183 kt | 9 h 26 min | 5:14 am EDT (09:14 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; 84 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 150 nm out; 50 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 299 nm out; 41 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° | |
| ABR | used from 449 nm out; 77 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 598 nm out; 39 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° |
| DLH | used from 748 nm out; 52 nm from the line | 240/6 | 230/22 15° | 250/28 11° | 230/22 4° | 270/33 -12° | 280/47 -21° | 280/59 -37° | 290/65 -47° | 290/88 -55° |
| GRB | used from 898 nm out; 84 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° |
| TVC | used from 997 nm out; 65 nm from the line | 210/17 | 290/14 15° | 310/20 9° | 310/18 2° | 310/24 -11° | 320/35 -22° | 320/53 -39° | 310/45 -49° | 290/58 -51° |
| BUF | used from 1247 nm out; 140 nm from the line | 170/19 | L/V 10° | 040/9 6° | 220/8 2° | 230/15 -11° | 220/33 -22° | 220/47 -35° | 230/55 -41° | 230/56 -50° |
| SYR | used from 1446 nm out; 41 nm from the line | 160/17 | 200/22 10° | 250/10 6° | L/V 1° | 270/11 -11° | 220/25 -20° | 220/66 -36° | 230/89 -42° | 240/74 -51° |
| ALB | used from 1546 nm out; 36 nm from the line | 160/27 | 190/16 9° | 200/29 7° | 230/21 3° | 240/24 -9° | 240/43 -19° | 230/65 -33° | 240/91 -42° | 230/99 -53° |
| BDL | used from 1646 nm out; 50 nm from the line | 140/28 | 180/29 10° | 220/38 8° | 250/30 3° | 250/40 -8° | 240/46 -18° | 240/58 -32° | 240/80 -41° | 240/89 -55° |
| BOS | used from 1696 nm out; 15 nm from the line | 160/27 | 190/23 9° | 260/20 7° | 260/32 1° | 250/48 -7° | 240/56 -17° | 240/59 -33° | 250/75 -43° | 250/94 -55° |
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 | low IFR Sky: a few clouds at 300 feet, overcast at 1,100 feet Weather: snow, fog | calm | 0.5 mi | 1,100 ft | 4,473 ft | 4:56 pm MDT (22:56 UTC) |
| BIL Billings, MT | 110 nm out, 11 nm south of the line, tower | IFR Sky: a broken layer at 800 feet, overcast at 1,200 feet Weather: light rain, mist | from the north-northeast (020°) at 13 knots | 6 mi | 800 ft | 3,662 ft | 22:53 UTC |
| BWW Bowman, ND | 329 nm out, 5 nm south of the line | low IFR Sky: overcast at 400 feet Weather: mist | from the east-northeast (060°) at 15 knots, gusting to 20 | 3 mi | 400 ft | 2,965 ft | 23:35 UTC |
| HEI Hettinger, ND | 359 nm out, 16 nm south of the line | IFR Sky: overcast at 500 feet Weather: mist | from the northeast (050°) at 14 knots | 4 mi | 500 ft | 2,705 ft | 23:45 UTC |
| BWP Wahpeton, ND | 608 nm out, 2 nm northwest of the line | VFR | from the north (360°) at 16 knots, gusting to 23 | 10+ mi | none | 968 ft | 23:35 UTC |
| HYR Hayward, WI | 818 nm out, 6 nm northeast of the line | VFR | from the south (180°) at 3 knots | 10+ mi | none | 1,215 ft | 22:53 UTC |
| PKF Park Falls, WI | 868 nm out, 7 nm northwest of the line | no report just now | 1,501 ft | ||||
| APN Alpena, MI | 1157 nm out, 2 nm northeast of the line, tower | VFR | from the east-southeast (120°) at 4 knots | 10+ mi | none | 689 ft | 22:54 UTC |
| CYOS Owen Sound, | 1277 nm out, 1 nm southeast of the line | no report just now | 1,007 ft | ||||
| RME Rome, NY | 1526 nm out, 15 nm south of the line, tower | VFR Sky: overcast at 4,400 feet Weather: rain, mist | from the east (100°) at 7 knots | 6 mi | 4,400 ft | 504 ft | 22:53 UTC |
| ASH Nashua, NH | 1696 nm out, 16 nm north of the line, tower | VFR Sky: overcast at 11,000 feet Weather: rain | calm | 7 mi | 11,000 ft | 200 ft | 22:56 UTC |
| BOS Boston, MA | destination | marginal VFR Sky: scattered clouds at 2,200 feet, a broken layer at 2,800 feet, overcast at 8,000 feet Weather: heavy rain, mist | from the southeast (130°) at 4 knots | 4 mi | 2,800 ft | 19 ft | 6:54 pm EDT (22:54 UTC) |
The highest airport on this list sits at 4,473 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BOS when you get there the forecast at the estimated arrival, 5:14 am EDT (09:14 UTC)
Wind from the northeast at 8 knots, visibility 2 miles, light rain showers, mist, overcast at 300 feet low IFR
The whole forecast for BOS
- From Sun 8:00 pm EDT (00:00 UTC): wind from the southeast at 4 knots, visibility 4 miles, heavy rain, mist, scattered clouds at 2,200 feet, a broken layer at 2,800 feet and more above
- From Sun 10:00 pm EDT (02:00 UTC): wind from the east-southeast at 5 knots, visibility 3 miles, light rain, mist, overcast at 1,000 feet
- From Sun 11:00 pm EDT (03:00 UTC): wind from the east at 6 knots, visibility 2 miles, light rain, mist, overcast at 800 feet
- From Mon 2:00 am EDT (06:00 UTC): wind from the northeast at 8 knots, visibility 2 miles, light rain showers, mist, overcast at 300 feet
- From Mon 9:00 am EDT (13:00 UTC): wind from the north at 7 knots, visibility 3 miles, mist, a broken layer at 800 feet
- From Mon 1:00 pm EDT (17:00 UTC): wind from the north-northwest at 5 knots, visibility more than 6 miles, scattered clouds at 15,000 feet
- From Mon 11:00 pm EDT (03:00 UTC): wind from the north-northeast at 5 knots, visibility more than 6 miles, scattered clouds at 4,500 feet
The forecast for BZN, the departure
- From Sun 6:00 pm MDT (00:00 UTC): wind light and variable, visibility ½ mile, snow, fog, overcast at 300 feet
- At times between Sun 9:00 pm MDT (03:00 UTC) and 12:00 am MDT (06:00 UTC): visibility 2 miles, light snow, mist, scattered clouds at 300 feet, overcast at 1,200 feet
- From Mon 12:00 am MDT (06:00 UTC): wind from the west at 7 knots, visibility 2 miles, light snow, mist, overcast at 800 feet
- At times between Mon 12:00 am MDT (06:00 UTC) and 3:00 am MDT (09:00 UTC): visibility 6 miles, light snow, mist, overcast at 800 feet
- From Mon 3:00 am MDT (09:00 UTC): wind light and variable, visibility more than 6 miles, overcast at 800 feet
- From Mon 12:00 pm MDT (18:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 800 feet, overcast at 2,000 feet
- From Mon 5:00 pm MDT (23:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 1,500 feet, a broken layer at 11,000 feet
Temporary flight restrictions on the line or within 25 nm of it
- 6/8802 Foxborough, MA, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 19 nm from the route, at the destination end · drones kept away from a public gathering · starts Saturday 17 October · ZBW
Daylight
Sunset at BZN 6:44 pm MDT (00:44 UTC), at BOS 6:07 pm EDT (22:07 UTC) (civil twilight ends 6:35 pm EDT (22:35 UTC)). At 120 knots the arrival at BOS is before sunrise there (6:53 am EDT (10:53 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, General Edward Lawrence Logan International.