Bozeman Yellowstone International to Philadelphia International BZN → PHL
1,606 nautical miles (1,848 statute miles) east on a straight line, true course 090°, about 077° magnetic at the departure end (variation 13E). At 120 knots that is 9 h 27 min at the quickest height in today's winds (39,000 ft, a 50-knot tailwind), arriving about 9:06 pm EDT (01:06 UTC), after sunset at the destination. Right now BZN is low IFR, wind from the south (170°) at 6 knots; PHL is marginal VFR, wind from the north-northwest (340°) at 15 knots, gusting to 27. 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: 2 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 C22C: thunderstorms (a convective SIGMET) up to 37,000 ft, moving from the southwest at 40 knots, until 10:55 am MDT (16:55 UTC). Over the route from 459 to 479 nm out.
as issued
WSUS32 KKCI 121455 MKCC WST 121455 CONVECTIVE SIGMET 22C VALID UNTIL 1655Z SD ND FROM 60W GFK-30WNW FAR-40NNE PIR-50NNE DPR-30NNW BIS-60W GFK AREA TS MOV FROM 21040KT. TOPS TO FL370.
- 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 718 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 140 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Near the route, 130 nm along the route.
- AIRMET SIERRA 1E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, mist). Over the route from 1297 to 1477 nm out.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, mist). Over the route from 1387 to 1516 nm out.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 24,000 ft to 40,000 ft. Over the last 140 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 14:00–21:00 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 14 forecast points nearest it (BIL, MLS, DIK, PIR, ABR, AXN, MSP, LSE, GRB, MKG, CLE, AGC, PSB, ACY). 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 10 kt | −8 kt | 128 kt | 12 h 33 min | 12:12 am EDT (04:12 UTC) | |
| 5,500 ft | 270° at 11 kt | −10 kt | 6 °C | 130 kt | 12 h 21 min | 12:00 am EDT (04:00 UTC) |
| 7,500 ft | 270° at 14 kt | −14 kt | 11 °C | 134 kt | 11 h 59 min | 11:38 pm EDT (03:38 UTC) |
| 9,500 ft | 260° at 17 kt | −17 kt | 7 °C | 137 kt | 11 h 43 min | 11:22 pm EDT (03:22 UTC) |
| 11,500 ft | 260° at 19 kt | −19 kt | 4 °C | 139 kt | 11 h 33 min | 11:12 pm EDT (03:12 UTC) |
| 13,500 ft | 260° at 20 kt | −20 kt | 0 °C | 140 kt | 11 h 28 min | 11:07 pm EDT (03:07 UTC) |
| 15,500 ft | 260° at 22 kt | −22 kt | -5 °C | 142 kt | 11 h 19 min | 10:58 pm EDT (02:58 UTC) |
| 17,500 ft | 260° at 24 kt | −23 kt | -9 °C | 143 kt | 11 h 14 min | 10:53 pm EDT (02:53 UTC) |
| 18,000 ft FL180 | 260° at 24 kt | −23 kt | -10 °C | 143 kt | 11 h 14 min | 10:53 pm EDT (02:53 UTC) |
| 24,000 ft FL240 | 250° at 30 kt | −28 kt | -22 °C | 148 kt | 10 h 51 min | 10:30 pm EDT (02:30 UTC) |
| 30,000 ft FL300 | 260° at 37 kt | −35 kt | -35 °C | 155 kt | 10 h 22 min | 10:01 pm EDT (02:01 UTC) |
| 34,000 ft FL340 | 260° at 41 kt | −41 kt | -40 °C | 161 kt | 9 h 59 min | 9:38 pm EDT (01:38 UTC) |
| 39,000 ft FL390 | 270° at 48 kt | −50 kt | -47 °C | 170 kt | 9 h 27 min | 9:06 pm EDT (01:06 UTC) |
Based on data from the 12th at 12:00 UTC; valid on the 12th at 18:00 UTC for use 14:00 to 21:00 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 | L/V | 250/11 -1° | 240/20 -2° | 230/28 -15° | 220/28 -28° | 220/53 -34° | 220/55 -39° | 220/63 -44° | |
| MLS | used from 150 nm out; 63 nm from the line | 320/9 -2° | 270/14 0° | 260/22 -1° | 220/30 -14° | 210/43 -26° | 230/53 -34° | 230/54 -38° | 230/59 -44° | |
| DIK | used from 299 nm out; 80 nm from the line | 330/11 1° | 230/20 4° | 220/22 0° | 230/29 -12° | 240/27 -25° | 240/40 -34° | 230/49 -37° | 240/55 -44° | |
| PIR | used from 399 nm out; 67 nm from the line | 300/15 10° | 270/10 10° | 220/18 4° | 220/36 -11° | 230/43 -21° | 240/48 -33° | 240/51 -37° | 240/55 -44° | |
| ABR | used from 499 nm out; 23 nm from the line | 020/9 | 230/5 12° | 190/14 11° | 200/25 5° | 230/37 -11° | 230/50 -23° | 240/39 -34° | 240/49 -38° | 240/55 -46° |
| AXN | used from 599 nm out; 74 nm from the line | 110/18 | 200/12 17° | 220/22 12° | 230/26 4° | 240/31 -10° | 240/45 -21° | 240/38 -36° | 250/49 -38° | 260/56 -47° |
| MSP | used from 698 nm out; 44 nm from the line | 140/8 | 210/22 19° | 230/31 13° | 240/31 5° | 240/29 -9° | 250/34 -21° | 250/38 -36° | 260/46 -38° | 270/55 -47° |
| LSE | used from 798 nm out; 31 nm from the line | 240/16 | 230/27 20° | 250/35 12° | 260/28 5° | 260/30 -9° | 260/37 -21° | 260/38 -36° | 280/44 -37° | 280/52 -47° |
| GRB | used from 948 nm out; 59 nm from the line | 260/10 | 240/27 16° | 260/31 10° | 270/25 5° | 280/31 -10° | 280/35 -22° | 270/46 -37° | 290/43 -40° | 300/64 -48° |
| MKG | used from 998 nm out; 52 nm from the line | 240/27 | 240/26 15° | 270/27 9° | 280/27 5° | 280/28 -9° | 280/32 -22° | 270/41 -38° | 290/44 -41° | 300/60 -48° |
| CLE | used from 1197 nm out; 77 nm from the line | 280/17 | 270/17 14° | 280/22 10° | 290/26 4° | 290/25 -8° | 280/31 -21° | 280/35 -36° | 280/43 -44° | 300/53 -48° |
| AGC | used from 1347 nm out; 63 nm from the line | 270/15 | 320/17 14° | 320/22 9° | 340/23 4° | 310/25 -8° | 290/30 -19° | 280/40 -36° | 290/49 -45° | 300/53 -49° |
| PSB | used from 1397 nm out; 41 nm from the line | 330/23 14° | 340/24 9° | 340/25 3° | 320/24 -8° | 300/29 -20° | 310/39 -36° | 310/52 -46° | 310/56 -50° | |
| ACY | used from 1546 nm out; 74 nm from the line | 010/26 | 360/24 11° | 350/28 8° | 350/26 4° | 340/29 -8° | 350/39 -21° | 350/57 -35° | 350/52 -43° | 310/50 -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 |
|---|---|---|---|---|---|---|---|
| BZN Bozeman, MT | departure | low IFR Sky: overcast at 200 feet Weather: mist | from the south (170°) at 6 knots | 3 mi | 200 ft | 4,473 ft | 9:00 am MDT (15:00 UTC) |
| BIL Billings, MT | 110 nm out, 3 nm north of the line, tower | VFR Sky: a few clouds at 500 feet, a few clouds at 2,100 feet, scattered clouds at 3,700 feet | from the southwest (230°) at 3 knots | 10+ mi | none | 3,662 ft | 14:53 UTC |
| MBG Mobridge, SD | 449 nm out, 15 nm north of the line | marginal VFR Sky: scattered clouds at 700 feet, overcast at 1,000 feet Weather: mist | from the north-northwest (340°) at 8 knots | 3 mi | 1,000 ft | 1,716 ft | 15:34 UTC |
| ATY Watertown, SD | 589 nm out, 4 nm southeast of the line | low IFR Sky: overcast at 200 feet Weather: mist | from the northeast (050°) at 8 knots | 2.5 mi | 200 ft | 1,749 ft | 15:19 UTC |
| RST Rochester, MN | 798 nm out, 22 nm south of the line, tower | VFR | from the south-southwest (200°) at 13 knots | 7 mi | none | 1,317 ft | 14:54 UTC |
| CMY Sparta, WI | 878 nm out, 5 nm west of the line, tower | VFR | from the southwest (220°) at 8 knots | 10+ mi | none | 839 ft | 14:55 UTC |
| GRR Grand Rapids, MI | 1107 nm out, 2 nm east of the line, tower | VFR Sky: a broken layer at 25,000 feet | from the south-southwest (210°) at 7 knots | 9 mi | 25,000 ft | 793 ft | 14:53 UTC |
| LAN Lansing, MI | 1147 nm out, 8 nm northeast of the line, tower | VFR | from the south-southwest (200°) at 6 knots | 10+ mi | none | 860 ft | 14:53 UTC |
| CGF Cleveland, OH | 1307 nm out, 16 nm southwest of the line, tower | marginal VFR Sky: a broken layer at 1,200 feet | from the west (260°) at 8 knots | 10+ mi | 1,200 ft | 876 ft | 14:45 UTC |
| LNS Lancaster, PA | 1556 nm out, 6 nm southwest of the line, tower | VFR | from the north (350°) at 10 knots, gusting to 19 | 10+ mi | none | 402 ft | 14:53 UTC |
| PHL Philadelphia, PA | destination | marginal VFR Sky: a broken layer at 2,100 feet, a broken layer at 5,500 feet, a broken layer at 20,000 feet | from the north-northwest (340°) at 15 knots, gusting to 27 | 10+ mi | 2,100 ft | 35 ft | 11:33 am EDT (15:33 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 PHL when you get there the forecast at the estimated arrival, 9:06 pm EDT (01:06 UTC)
Wind light and variable, visibility more than 6 miles, a few clouds at 25,000 feet VFR
The whole forecast for PHL
- From Mon 11:00 am EDT (15:00 UTC): wind from the north at 12 knots, gusting to 20, visibility more than 6 miles, a broken layer at 2,000 feet, a broken layer at 6,000 feet
- From Mon 1:00 pm EDT (17:00 UTC): wind from the north-northwest at 12 knots, visibility more than 6 miles, scattered clouds at 5,000 feet
- From Mon 6:00 pm EDT (22:00 UTC): wind from the northwest at 8 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
- From Mon 9:00 pm EDT (01:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 25,000 feet
- From Tue 12:00 pm EDT (16:00 UTC): wind from the south-southwest at 5 knots, visibility more than 6 miles, a few clouds at 15,000 feet
The forecast for BZN, the departure
- From Mon 10:00 am MDT (16:00 UTC): wind light and variable, visibility 6 miles, mist, scattered clouds at 400 feet, overcast at 1,500 feet
- At times between Mon 9:00 am MDT (15:00 UTC) and 11:00 am MDT (17:00 UTC): visibility 5 miles, mist, overcast at 400 feet
- From Mon 11:00 am MDT (17:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 600 feet, overcast at 1,500 feet
- From Mon 7:00 pm MDT (01:00 UTC): wind light and variable, visibility 6 miles, mist, overcast at 300 feet
Temporary flight restrictions on the line or within 25 nm of it
- 6/8992 Monroe, MI, Thursday, October 15, 2026 Local 19 nm from the route, 1217 nm along the route · a VIP movement · starts Thursday 15 October · ZOB
- 6/8587 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local on the route, 1337 nm along the route · a VIP movement · today · ZOB
- 6/8888 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 17 nm from the route, 1347 nm along the route · security · today · ZOB
- 6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 13 nm from the route, 1347 nm along the route · a VIP movement · today · ZOB
Daylight
Sunset at BZN 6:42 pm MDT (00:42 UTC), at PHL 6:26 pm EDT (22:26 UTC) (civil twilight ends 6:53 pm EDT (22:53 UTC)). At 120 knots the arrival at PHL is after sunset there (6:26 pm EDT (22:26 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, Philadelphia International.