Palm Springs International to Boise Air Trml/Gowen Field PSP → BOI
585 nautical miles (673 statute miles) north on a straight line, true course 001°, about 348° magnetic at the departure end (variation 13E). At 120 knots that is 3 h 22 min at the quickest height in today's winds (34,000 ft, a 54-knot tailwind), arriving about 10:32 pm MDT (04:32 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: 164 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 12,000 ft. Over the first 149 nm of the route.
- AIRMET SIERRA 6E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 10 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the last 555 nm of the route.
- AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the last 545 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 159 to 188 nm out.
- AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the route from 198 to 307 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Near the route, 228 nm along 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 PSP.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B38M at 14,000 ft, 24 nm west, 5:13 pm PDT (00:13 UTC): moderate turbulence, light rime icing, 8 °C. 30 nm along the route, 24 nm west 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
- A21N at 29,500 ft, 5 nm northeast, 3:50 pm PDT (22:50 UTC): remarks: mountain wave 10-15 kts/zlawc. 69 nm along the route, 5 nm northeast 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
- BCS3 at 31,000 ft, 23 nm east, 3:44 pm PDT (22:44 UTC): remarks: mountain wave 20 kts/zlawc. 99 nm along the route, 23 nm east 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
- G280 at 41,000 ft, 49 nm east, 4:37 pm PDT (23:37 UTC): light to moderate clear-air turbulence, remarks: ZDVWC-46. 109 nm along the route, 49 nm east of the line.
as filed, and in English
ALS UA /OV LAS190035/TM 2337/FL410/TP G280/TB LGT-MOD CAT/RM ZDVWC-46
- Report
- a routine report filed through ALS
- Where
- 35 nm south (190°) of LAS
- Time
- 23:37 UTC
- Height
- at 41,000 ft
- Aircraft
- G280
- Turbulence
- light to moderate clear-air turbulence
- Remarks
- ZDVWC-46
- B38M at 37,000 ft, 28 nm west, 3:25 pm PDT (22:25 UTC): -41 °C, wind 215° at 61 knots, remarks: produced by skypath. 198 nm along the route, 28 nm west of the line.
as filed, and in English
TPH UA /OV BTY308020 /TM 2225 /FL370 /TP B38M /TA M41 /WV 21561KT /RM PRODUCED BY SKYPATH
- Report
- a routine report filed through TPH
- Where
- 20 nm northwest (308°) of BTY
- Time
- 22:25 UTC
- Height
- at 37,000 ft
- Aircraft
- B38M
- Temperature
- −41 °C
- Wind
- from 215° at 61 knots
- Remarks
- produced by skypath
- CL60 descending, 2 nm southeast, 4:00 pm PDT (23:00 UTC): remarks: + 10 knots on final. At the destination end, 2 nm southeast of the line.
as filed, and in English
BOI UA /OV BOI/TM 2300/FLDURD/TP CL60/RM +/- 10 KTS ON FINAL
- Report
- a routine report filed through BOI
- Where
- over BOI
- Time
- 23:00 UTC
- Height
- during the descent
- Aircraft
- CL60
- Remarks
- + 10 knots on final
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 6 forecast points nearest it (ONT, LAS, BIH, ELY, 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 | 220° at 10 kt | −7 kt | 8 °C | 127 kt | 4 h 36 min | 11:46 pm MDT (05:46 UTC) |
| 6,500 ft | 220° at 12 kt | −9 kt | 6 °C | 129 kt | 4 h 32 min | 11:42 pm MDT (05:42 UTC) |
| 8,500 ft | 230° at 14 kt | −10 kt | 4 °C | 130 kt | 4 h 30 min | 11:40 pm MDT (05:40 UTC) |
| 10,500 ft | 230° at 20 kt | −13 kt | 0 °C | 133 kt | 4 h 24 min | 11:34 pm MDT (05:34 UTC) |
| 12,500 ft | 230° at 26 kt | −17 kt | -4 °C | 137 kt | 4 h 16 min | 11:26 pm MDT (05:26 UTC) |
| 14,500 ft | 220° at 30 kt | −22 kt | -8 °C | 142 kt | 4 h 07 min | 11:17 pm MDT (05:17 UTC) |
| 16,500 ft | 220° at 35 kt | −27 kt | -12 °C | 147 kt | 3 h 59 min | 11:09 pm MDT (05:09 UTC) |
| 18,000 ft FL180 | 220° at 39 kt | −31 kt | -15 °C | 151 kt | 3 h 52 min | 11:02 pm MDT (05:02 UTC) |
| 24,000 ft FL240 | 210° at 50 kt | −44 kt | -24 °C | 164 kt | 3 h 34 min | 10:44 pm MDT (04:44 UTC) |
| 30,000 ft FL300 | 220° at 64 kt | −53 kt | -29 °C | 173 kt | 3 h 23 min | 10:33 pm MDT (04:33 UTC) |
| 34,000 ft FL340 | 220° at 65 kt | −54 kt | -34 °C | 174 kt | 3 h 22 min | 10:32 pm MDT (04:32 UTC) |
| 39,000 ft FL390 | 220° at 60 kt | −47 kt | -43 °C | 167 kt | 3 h 30 min | 10:40 pm MDT (04:40 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| ONT | used from 0 nm out; 56 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° |
| LAS | used from 99 nm out; 64 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° | |
| BIH | used from 198 nm out; 94 nm from the line | L/V | 210/14 6° | 210/20 -2° | 230/26 -14° | 220/32 -24° | 220/63 -27° | 220/56 -35° | 230/50 -44° | |
| ELY | used from 248 nm out; 91 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° | ||
| BAM | used from 347 nm out; 43 nm from the line | 270/8 4° | 230/27 -4° | 220/49 -18° | 210/52 -26° | 220/77 -29° | 220/71 -33° | 220/63 -43° | ||
| BOI | used from 495 nm out; 64 nm from the line | 330/14 4° | 230/5 -2° | 220/20 -7° | 210/37 -20° | 200/59 -26° | 200/67 -34° | 210/73 -35° | 220/62 -41° |
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 |
|---|---|---|---|---|---|---|---|
| PSP Palm Springs, CA | departure | no report just now | 476 ft | ||||
| DAG Daggett, CA | 59 nm out, 15 nm west of the line | no report just now | 1,930 ft | ||||
| BTY Beatty, NV | 178 nm out, 18 nm west of the line | no report just now | 3,169 ft | ||||
| EKO Elko, NV | 416 nm out, 24 nm east of the line | no report just now | 5,139 ft | ||||
| BOI Boise, ID | destination | no report just now | 2,871 ft |
The highest airport on this list sits at 5,139 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, 10:32 pm MDT (04:32 UTC)
BOI has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/8887 Indio, CA, Sunday, October 11, 2026 through Monday, October 12, 2026 Local 15 nm from the route, at the departure end · security · until 12 October · ZLA
Daylight
Sunset at PSP 6:16 pm PDT (01:16 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 after sunset there (7:08 pm MDT (01:08 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: Palm Springs International, Boise Air Trml/Gowen Field.