Long Beach (Daugherty Field) to Boise Air Trml/Gowen Field LGB → BOI
592 nautical miles (681 statute miles) north on a straight line, true course 008°, about 354° magnetic at the departure end (variation 14E). At 120 knots that is 3 h 28 min at the quickest height in today's winds (30,000 ft, a 51-knot tailwind), arriving about 12:34 am MDT (06:34 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: 41 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 TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the first 296 nm of the route.
- AIRMET SIERRA 6E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 69 nm of the route.
- AIRMET TANGO 3W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Near the route, 168 nm along the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the last 316 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 316 to 375 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 LGB.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B737 at 6,400 ft, 0 nm south, 6:30 pm PDT (01:30 UTC): a broken layer from 3,300 ft to 6,400 ft. At the departure end, 0 nm south 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
- A20N at 5,300 ft, 17 nm southeast, 6:00 pm PDT (01:00 UTC): a broken layer from 4,300 ft to 5,300 ft. At the departure end, 17 nm southeast 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
- A21B at 4,000 ft, 16 nm northwest, 5:11 pm PDT (00:11 UTC): a broken layer above 4,000 ft, remarks: during the descent runway 25L. At the departure end, 16 nm northwest of the line.
as filed, and in English
LAX UA /OV LAX/TM 0011/FL040/TP A21B/SK BKN-BASE040/RM DURD RY25L
- Report
- a routine report filed through LAX
- Where
- over LAX
- Time
- 00:11 UTC
- Height
- at 4,000 ft
- Aircraft
- A21B
- Sky
- BKN-BASE040
- Remarks
- during the descent runway 25L
- A21N at 2,000 ft, 15 nm east, 6:06 pm PDT (01:06 UTC): remarks: ils 25L haze below the ceiling. At the departure end, 15 nm east 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 climbing, 24 nm east, 8:03 pm PDT (03:03 UTC): a routine report with nothing remarked on. At the departure end, 24 nm east of the line.
as filed, and in English
ONT UA /OV ONT204003/TM 0303/FLDURC/TP A20N/SK B-030
- Report
- a routine report filed through ONT
- Where
- 3 nm southwest (204°) of ONT
- Time
- 03:03 UTC
- Height
- during the climb
- Aircraft
- A20N
- Sky
- B-030
- B737 climbing, 10 nm east, 8:01 pm PDT (03:01 UTC): a routine report with nothing remarked on. At the departure end, 10 nm east of the line.
as filed, and in English
ONT UA /OV ONT278016/TM 0301/FLDURC/TP B737/SK B-047 -T080
- Report
- a routine report filed through ONT
- Where
- 16 nm west (278°) of ONT
- Time
- 03:01 UTC
- Height
- during the climb
- Aircraft
- B737
- Sky
- B-047 T080
- SLG4 at 3,000 ft, 9 nm east, 6:33 pm PDT (01:33 UTC): scattered clouds above 4,000 ft. At the departure end, 9 nm east 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
- B739 at 4,000 ft, 14 nm west, 5:32 pm PDT (00:32 UTC): overcast above 4,000 ft. At the departure end, 14 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
- E75L climbing, 2 nm west, 7:15 pm PDT (02:15 UTC): a routine report with nothing remarked on. 30 nm along the route, 2 nm west of the line.
as filed, and in English
ONT UA /OV ONT290030/TM 0215/FLDURC/TP E75L/SK T-078
- Report
- a routine report filed through ONT
- Where
- 30 nm west (290°) of ONT
- Time
- 02:15 UTC
- Height
- during the climb
- Aircraft
- E75L
- Sky
- T-078
- PC12 at 14,000 ft, 42 nm east, 7:13 pm PDT (02:13 UTC): light turbulence up to 21,000 ft, light rime icing from 10,000 ft to 14,000 ft, -10 °C. 562 nm along the route, 42 nm east of the line.
as filed, and in English
BOI UA /OV BOI117049/TM 0213/FL140/TP PC12/TA M10/TB CONS LGT 210 BLO/IC LGT RIME 140-100 /ZLC
- Report
- a routine report filed through BOI
- Where
- 49 nm southeast (117°) of BOI
- Time
- 02:13 UTC
- Height
- at 14,000 ft
- Aircraft
- PC12
- Temperature
- −10 °C
- Turbulence
- continuous light at 21,000 ft below
- Icing
- light rime from 14,000 ft to 10,000 ft zlc
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 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 5 forecast points nearest it (ONT, WJF, BIH, BAM, BOI). 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 | 210° at 8 kt | −8 kt | 4 °C | 128 kt | 4 h 38 min | 1:44 am MDT (07:44 UTC) |
| 6,500 ft | 210° at 10 kt | −9 kt | 4 °C | 129 kt | 4 h 35 min | 1:41 am MDT (07:41 UTC) |
| 8,500 ft | 240° at 8 kt | −6 kt | 1 °C | 126 kt | 4 h 42 min | 1:48 am MDT (07:48 UTC) |
| 10,500 ft | 230° at 13 kt | −10 kt | -3 °C | 130 kt | 4 h 33 min | 1:39 am MDT (07:39 UTC) |
| 12,500 ft | 220° at 18 kt | −15 kt | -6 °C | 135 kt | 4 h 23 min | 1:29 am MDT (07:29 UTC) |
| 14,500 ft | 210° at 25 kt | −23 kt | -10 °C | 143 kt | 4 h 08 min | 1:14 am MDT (07:14 UTC) |
| 16,500 ft | 210° at 32 kt | −30 kt | -14 °C | 150 kt | 3 h 57 min | 1:03 am MDT (07:03 UTC) |
| 18,000 ft FL180 | 200° at 38 kt | −36 kt | -16 °C | 156 kt | 3 h 48 min | 12:54 am MDT (06:54 UTC) |
| 24,000 ft FL240 | 200° at 50 kt | −48 kt | -26 °C | 168 kt | 3 h 31 min | 12:37 am MDT (06:37 UTC) |
| 30,000 ft FL300 | 220° at 59 kt | −51 kt | -29 °C | 171 kt | 3 h 28 min | 12:34 am MDT (06:34 UTC) |
| 34,000 ft FL340 | 220° at 56 kt | −48 kt | -34 °C | 168 kt | 3 h 31 min | 12:37 am MDT (06:37 UTC) |
| 39,000 ft FL390 | 220° at 50 kt | −41 kt | -42 °C | 161 kt | 3 h 41 min | 12:47 am MDT (06:47 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| ONT | used from 0 nm out; 26 nm from the line | 190/8 | 190/19 6° | 210/23 4° | 210/29 -3° | 210/47 -13° | 210/49 -19° | 220/47 -30° | 220/50 -36° | 220/55 -43° |
| WJF | used from 49 nm out; 23 nm from the line | 200/28 6° | 210/28 3° | 210/29 -4° | 210/28 -14° | 220/41 -20° | 220/47 -29° | 220/46 -37° | 220/53 -44° | |
| BIH | used from 148 nm out; 55 nm from the line | L/V | 240/7 1° | 190/13 -3° | 200/26 -16° | 210/43 -26° | 220/54 -28° | 220/51 -35° | 220/47 -43° | |
| BAM | used from 296 nm out; 91 nm from the line | 310/7 0° | 270/19 -7° | 200/38 -17° | 190/49 -28° | 220/69 -29° | 220/63 -33° | 230/48 -41° | ||
| BOI | used from 493 nm out; 74 nm from the line | 300/7 2° | 280/5 -4° | 210/16 -9° | 210/60 -20° | 210/75 -29° | 210/63 -32° | 220/64 -32° | 220/54 -39° |
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 |
|---|---|---|---|---|---|---|---|
| LGB Long Beach, CA | departure | no report just now | 60 ft | ||||
| PMD Palmdale, CA | 49 nm out, 4 nm west of the line, tower | no report just now | 2,542 ft | ||||
| MHV Mojave, CA | 69 nm out, 12 nm northwest of the line, tower | no report just now | 2,801 ft | ||||
| TPH Tonopah, NV | 257 nm out, 14 nm east of the line | no report just now | 5,430 ft | ||||
| TMT Austin, NV | 345 nm out, 5 nm southwest of the line | no report just now | 5,735 ft | ||||
| BAM Battle Mountain, NV | 414 nm out, 3 nm south of the line | no report just now | 4,536 ft | ||||
| BOI Boise, ID | destination | no report just now | 2,871 ft |
The highest airport on this list sits at 5,735 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BOI when you get there the forecast at the estimated arrival, 12:34 am MDT (06:34 UTC)
BOI has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 4/3635 DISNEYLAND THEME PARK, ANAHEIM,, CA 9 nm from the route, at the departure end · security · ZLA
- 6/8783 38NM NE BAKERSFIELD, CA, Saturday, October 10, 2026 through Friday, October 23, 2026 UTC 23 nm from the route, 109 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 23 October · ZLA
Daylight
Sunset at LGB 6:22 pm PDT (01:22 UTC), at BOI 7:06 pm MDT (01:06 UTC) (civil twilight ends 7:35 pm MDT (01:35 UTC)). At 120 knots the arrival at BOI is before sunrise there (7:55 am MDT (13:55 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: Long Beach (Daugherty Field), Boise Air Trml/Gowen Field.