Bozeman Yellowstone International to Ontario International BZN → ONT
763 nautical miles (878 statute miles) southwest on a straight line, true course 205°, about 192° magnetic at the departure end (variation 13E). At 120 knots that is 7 h 04 min at the quickest height in today's winds (4,500 ft, a 12-knot headwind), arriving about 1:45 am PDT (08:45 UTC), after sunset at the destination. Right now BZN is low IFR, wind calm; ONT is VFR, wind from the west-southwest (240°) at 8 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: 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
- SIGMET 5W: thunderstorms (a convective SIGMET) up to 33,000 ft, moving from the southwest at 20 knots, until 8:55 pm MDT (02:55 UTC). Near the route, 357 nm along the route.
as issued
WSUS33 KKCI 120055 MKCW WST 120055 CONVECTIVE SIGMET 5W VALID UNTIL 0255Z NV FROM 10NNE BAM-40WSW BVL-60SW ELY-10SE OAL-30WNW OAL-10NNE BAM AREA TS MOV FROM 23020KT. TOPS TO FL330.
- 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 208 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the first 585 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 525 nm of the route.
- AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 59 to 644 nm out.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 357 to 595 nm out.
- AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Near the route, 605 nm along the route.
- AIRMET SIERRA 6E: mountains obscured by cloud (due to mountains obscured by clouds, 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 BZN.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B738 at 33,000 ft, 5 nm southeast, 5:57 pm MDT (23:57 UTC): moderate chop turbulence from 31,000 ft to 33,000 ft. 79 nm along the route, 5 nm southeast of the line.
as filed, and in English
IDA UA /OV DBS015030/TM 2357/FL330/TP B738/TB MOD CHOP 310-330 /ZLC
- Report
- a routine report filed through IDA
- Where
- 30 nm north (015°) of DBS
- Time
- 23:57 UTC
- Height
- at 33,000 ft
- Aircraft
- B738
- Turbulence
- moderate chop from 31,000 ft to 33,000 ft zlc
- B38M at 14,000 ft, 24 nm east, 6:13 pm MDT (00:13 UTC): moderate turbulence, light rime icing, 8 °C. At the destination end, 24 nm east of the line.
as filed, and in English
ONT UA /OV ONT053034/TM 0013/FL140/TP B38M/TA 08/TB MODERATE TURBULENCE/IC LIGHT RIME ICE 190 - 170
- Report
- a routine report filed through ONT
- Where
- 34 nm northeast (053°) of ONT
- Time
- 00:13 UTC
- Height
- at 14,000 ft
- Aircraft
- B38M
- Temperature
- 8 °C
- Turbulence
- moderate turbulence
- Icing
- light rime ice at 19,000 ft at 17,000 ft
- E75L descending, 0 nm northwest, 7:04 pm MDT (01:04 UTC): remarks: had the airport in sight at 400-500FT above ground. At the departure end, 0 nm northwest of the line.
as filed, and in English
BZN UA /OV BZN/TM 0104/FLDURD/TP E75L/RM HAD THE AIRPORT IN SIGHT AT 400-500FT AGL
- Report
- a routine report filed through BZN
- Where
- over BZN
- Time
- 01:04 UTC
- Height
- during the descent
- Aircraft
- E75L
- Remarks
- had the airport in sight at 400-500FT above ground
- B737 descending, 0 nm northwest, 6:28 pm MDT (00:28 UTC): scattered clouds above 8,000 ft, fog, snow, remarks: broke out about 100FT above mins. At the departure end, 0 nm northwest of the line.
as filed, and in English
BZN UA /OV BZN/TM 0028/FLDURD/TP B737/SK SCT080/WX 1/2SM SN FG/RM BROKE OUT ABOUT 100FT ABOVE MINS
- Report
- a routine report filed through BZN
- Where
- over BZN
- Time
- 00:28 UTC
- Height
- during the descent
- Aircraft
- B737
- Sky
- scattered clouds from 8,000 ft
- Weather
- 1/2SM, snow, fog
- Remarks
- broke out about 100FT above mins
- B738 at 24,000 ft, 30 nm west, 5:13 pm MDT (23:13 UTC): remarks: snow top flight level at 24,000 ft zlc. At the departure end, 30 nm west of the line.
as filed, and in English
BZN UA /OV BZN270030/TM 2313/FL240/TP B738/RM SN TOP FL 240 /ZLC
- Report
- a routine report filed through BZN
- Where
- 30 nm west (270°) of BZN
- Time
- 23:13 UTC
- Height
- at 24,000 ft
- Aircraft
- B738
- Remarks
- snow top flight level at 24,000 ft zlc
- BCS3 at 31,000 ft, 44 nm southeast, 4:44 pm MDT (22:44 UTC): remarks: mountain wave 20 kts/zlawc. 654 nm along the route, 44 nm southeast of the line.
as filed, and in English
DAG UA /OV DAG030040/TM 2244/FL310/TP BCS3/RM MTN WAVE /- 20 KTS/ZLAWC AWC-WEB
- Report
- a routine report filed through DAG
- Where
- 40 nm northeast (030°) of DAG
- Time
- 22:44 UTC
- Height
- at 31,000 ft
- Aircraft
- BCS3
- Remarks
- mountain wave 20 kts/zlawc
- A21N at 29,500 ft, 34 nm southeast, 4:50 pm MDT (22:50 UTC): remarks: mountain wave 10-15 kts/zlawc. 684 nm along the route, 34 nm southeast of the line.
as filed, and in English
DAG UA /OV DAG045010/TM 2250/FL295/TP A21N/RM MTN WAVE /- 10-15 KTS/ZLAWC AWC-WEB
- Report
- a routine report filed through DAG
- Where
- 10 nm northeast (045°) of DAG
- Time
- 22:50 UTC
- Height
- at 29,500 ft
- Aircraft
- A21N
- Remarks
- mountain wave 10-15 kts/zlawc
- B739 at 33,000 ft, 15 nm west, 5:02 pm MDT (23:02 UTC): remarks: mountain wave 10 knots zlawc. At the destination end, 15 nm west of the line.
as filed, and in English
DRA UA /OV VCV242015/TM 2302/FL330/TP B739/RM MTN WAVE /- 10 KT /ZLAWC AWC-WEB
- Report
- a routine report filed through DRA
- Where
- 15 nm southwest (242°) of VCV
- Time
- 23:02 UTC
- Height
- at 33,000 ft
- Aircraft
- B739
- Remarks
- mountain wave 10 knots zlawc
- B739 at 33,000 ft, 34 nm northwest, 5:01 pm MDT (23:01 UTC): remarks: mountain wave 10 knots zlawc. At the destination end, 34 nm northwest of the line.
as filed, and in English
SDB UA /OV PMD/TM 2301/FL330/TP B739/RM MTN WAVE /- 10 KT /ZLAWC AWC-WEB
- Report
- a routine report filed through SDB
- Where
- over PMD
- Time
- 23:01 UTC
- Height
- at 33,000 ft
- Aircraft
- B739
- Remarks
- mountain wave 10 knots zlawc
- SLG4 at 3,000 ft, 16 nm west, 7:33 pm MDT (01:33 UTC): scattered clouds above 4,000 ft. At the destination end, 16 nm west of the line.
as filed, and in English
EMT UA /OV EMT070006/TM 0133/FL030/TP SLG4/SK SCT040
- Report
- a routine report filed through EMT
- Where
- 6 nm east (070°) of EMT
- Time
- 01:33 UTC
- Height
- at 3,000 ft
- Aircraft
- SLG4
- Sky
- scattered clouds from 4,000 ft
- B737 at 6,400 ft, 31 nm southwest, 7:30 pm MDT (01:30 UTC): a broken layer from 3,300 ft to 6,400 ft. At the destination end, 31 nm southwest of the line.
as filed, and in English
LGB UA /OV LGB/TM 0130/FL064/TP B737/SK BKN033-TOP064
- Report
- a routine report filed through LGB
- Where
- over LGB
- Time
- 01:30 UTC
- Height
- at 6,400 ft
- Aircraft
- B737
- Sky
- a broken layer from 3,300 ft, tops 6,400 ft
- A21N at 2,000 ft, 12 nm southwest, 7:06 pm MDT (01:06 UTC): remarks: ils 25L haze below the ceiling. At the destination end, 12 nm southwest of the line.
as filed, and in English
LAX UA /OV LAX070030/TM 0106/FL020/TP A21N/SK TOPS068 BASES040/RM ILS 25L - HZ BELOW THE CEILING
- Report
- a routine report filed through LAX
- Where
- 30 nm east (070°) of LAX
- Time
- 01:06 UTC
- Height
- at 2,000 ft
- Aircraft
- A21N
- Sky
- TOPS068 BASES040
- Remarks
- ils 25L haze below the ceiling
- A20N at 5,300 ft, 26 nm southwest, 7:00 pm MDT (01:00 UTC): a broken layer from 4,300 ft to 5,300 ft. At the destination end, 26 nm southwest of the line.
as filed, and in English
SNA UA /OV SNA/TM 0100/FL053/TP A20N/SK BKN043-TOP053
- Report
- a routine report filed through SNA
- Where
- over SNA
- Time
- 01:00 UTC
- Height
- at 5,300 ft
- Aircraft
- A20N
- Sky
- a broken layer from 4,300 ft, tops 5,300 ft
- B739 at 4,000 ft, 39 nm west, 6:32 pm MDT (00:32 UTC): overcast above 4,000 ft. At the destination end, 39 nm west of the line.
as filed, and in English
BUR UA /OV BUR/TM 0032/FL040/TP B739/SK OVC040
- Report
- a routine report filed through BUR
- Where
- over BUR
- Time
- 00:32 UTC
- Height
- at 4,000 ft
- Aircraft
- B739
- Sky
- overcast from 4,000 ft
4 more routine reports are on the map.
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 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 7 forecast points nearest it (DLN, PIH, SLC, ELY, LAS, WJF, ONT). 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 13 kt | +12 kt | 10 °C | 108 kt | 7 h 04 min | 1:45 am PDT (08:45 UTC) |
| 6,500 ft | 230° at 15 kt | +13 kt | 8 °C | 107 kt | 7 h 08 min | 1:49 am PDT (08:49 UTC) |
| 8,500 ft | 230° at 15 kt | +14 kt | 3 °C | 106 kt | 7 h 12 min | 1:53 am PDT (08:53 UTC) |
| 10,500 ft | 230° at 19 kt | +17 kt | 1 °C | 103 kt | 7 h 24 min | 2:05 am PDT (09:05 UTC) |
| 12,500 ft | 220° at 23 kt | +21 kt | -3 °C | 99 kt | 7 h 42 min | 2:23 am PDT (09:23 UTC) |
| 14,500 ft | 220° at 29 kt | +28 kt | -6 °C | 92 kt | 8 h 18 min | 2:59 am PDT (09:59 UTC) |
| 16,500 ft | 210° at 35 kt | +34 kt | -10 °C | 86 kt | 8 h 52 min | 3:33 am PDT (10:33 UTC) |
| 18,000 ft FL180 | 210° at 40 kt | +39 kt | -12 °C | 81 kt | 9 h 25 min | 4:06 am PDT (11:06 UTC) |
| 24,000 ft FL240 | 210° at 52 kt | +52 kt | -23 °C | 68 kt | 11 h 13 min | 5:54 am PDT (12:54 UTC) |
| 30,000 ft FL300 | 210° at 64 kt | +64 kt | -30 °C | 56 kt | 13 h 38 min | 8:19 am PDT (15:19 UTC) |
| 34,000 ft FL340 | 220° at 70 kt | +68 kt | -36 °C | 52 kt | 14 h 40 min | 9:21 am PDT (16:21 UTC) |
| 39,000 ft FL390 | 220° at 67 kt | +63 kt | -44 °C | 57 kt | 13 h 23 min | 8:04 am PDT (15:04 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| DLN | used from 0 nm out; 50 nm from the line | 080/10 -3° | 180/8 -3° | 180/23 -14° | 200/58 -22° | 200/80 -36° | 220/85 -41° | 230/81 -45° | ||
| PIH | used from 99 nm out; 60 nm from the line | 270/10 | 270/13 1° | 210/16 -2° | 200/56 -11° | 200/51 -23° | 200/68 -33° | 220/77 -37° | 230/73 -44° | |
| SLC | used from 297 nm out; 99 nm from the line | 280/8 | 210/39 5° | 210/52 -1° | 200/50 -11° | 200/56 -23° | 220/61 -28° | 230/73 -37° | 230/73 -45° | |
| ELY | used from 347 nm out; 50 nm from the line | 210/20 4° | 240/21 -1° | 230/37 -13° | 200/58 -25° | 220/73 -27° | 220/73 -36° | 220/69 -44° | ||
| LAS | used from 545 nm out; 76 nm from the line | 200/25 11° | 230/22 5° | 240/25 -1° | 220/37 -12° | 220/44 -21° | 210/52 -27° | 210/60 -34° | 220/58 -44° | |
| WJF | used from 644 nm out; 79 nm from the line | 220/30 8° | 240/28 5° | 230/34 -2° | 220/34 -13° | 220/48 -20° | 220/47 -29° | 210/48 -34° | 220/52 -44° | |
| ONT | used from 694 nm out; 45 nm from the line | 230/11 | 200/17 6° | 230/27 4° | 230/32 -2° | 210/39 -12° | 220/51 -20° | 220/48 -29° | 210/51 -34° | 210/52 -44° |
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 300 feet Weather: light snow, mist | calm | 1.5 mi | 300 ft | 4,473 ft | 7:25 pm MDT (01:25 UTC) |
| EKS Ennis, MT | 40 nm out, 7 nm northwest of the line | IFR Sky: overcast at 500 feet Weather: light snow, mist | from the north (350°) at 15 knots, gusting to 22 | 1.5 mi | 500 ft | 5,432 ft | 01:30 UTC |
| IDA Idaho Falls, ID | 139 nm out, 21 nm southeast of the line, tower | IFR Sky: a broken layer at 700 feet, a broken layer at 3,200 feet, overcast at 4,000 feet Weather: light rain | from the south-southeast (150°) at 6 knots | 10+ mi | 700 ft | 4,743 ft | 01:31 UTC |
| PIH Pocatello, ID | 178 nm out, 15 nm southeast of the line, tower | VFR Sky: scattered clouds at 1,200 feet, a broken layer at 6,000 feet, overcast at 8,500 feet Weather: light rain | from the southwest (230°) at 9 knots | 10+ mi | 6,000 ft | 4,451 ft | 00:53 UTC |
| ENV Wendover, UT | 327 nm out, 9 nm southeast of the line | VFR Sky: scattered clouds at 11,000 feet | from the east-southeast (110°) at 5 knots | 10+ mi | none | 4,236 ft | 00:56 UTC |
| ELY Ely, NV | 426 nm out, 9 nm east of the line | VFR | from the south (170°) at 12 knots, gusting to 22 | 10+ mi | none | 6,259 ft | 00:53 UTC |
| BTY Beatty, NV | 595 nm out, 24 nm northwest of the line | no report just now | 3,169 ft | ||||
| VCV Victorville, CA | 733 nm out, 5 nm north of the line, tower | VFR | from the south (170°) at 25 knots, gusting to 32 | 10+ mi | none | 2,885 ft | 01:35 UTC |
| ONT Ontario, CA | destination | VFR Sky: scattered clouds at 4,900 feet, a broken layer at 12,000 feet | from the west-southwest (240°) at 8 knots | 10+ mi | 12,000 ft | 944 ft | 5:53 pm PDT (00:53 UTC) |
The highest airport on this list sits at 6,259 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At ONT when you get there the forecast at the estimated arrival, 1:45 am PDT (08:45 UTC)
Wind from the west-southwest at 8 knots, visibility more than 6 miles, showers nearby, overcast at 2,500 feet marginal VFR
The whole forecast for ONT
- From Sun 5:00 pm PDT (00:00 UTC): wind from the southwest at 11 knots, gusting to 18, visibility more than 6 miles, a few clouds at 3,000 feet, a broken layer at 5,000 feet
- From Sun 11:00 pm PDT (06:00 UTC): wind from the west-southwest at 8 knots, visibility more than 6 miles, showers nearby, overcast at 2,500 feet
- From Mon 3:00 am PDT (10:00 UTC): wind from the west-southwest at 4 knots, visibility more than 6 miles, showers nearby, a few clouds at 2,500 feet, a broken layer at 5,000 feet
- From Mon 11:00 am PDT (18:00 UTC): wind from the west-southwest at 5 knots, visibility more than 6 miles, a broken layer at 5,000 feet
- From Mon 2:00 pm PDT (21:00 UTC): wind from the west-southwest at 11 knots, gusting to 18, visibility more than 6 miles, a broken layer at 5,000 feet
- From Mon 8:00 pm PDT (03:00 UTC): wind from the west-southwest at 9 knots, visibility more than 6 miles, a broken layer at 6,000 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
- 4/3635 DISNEYLAND THEME PARK, ANAHEIM,, CA 19 nm from the route, at the destination end · security · ZLA
Daylight
Sunset at BZN 6:44 pm MDT (00:44 UTC), at ONT 6:20 pm PDT (01:20 UTC) (civil twilight ends 6:45 pm PDT (01:45 UTC)). At 120 knots the arrival at ONT is before sunrise there (6:53 am PDT (13:53 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, Ontario International.