Boeing Fld/King County International to Jacqueline Cochran Regional BFI → TRM
880 nautical miles (1,012 statute miles) south on a straight line, true course 159°, about 144° magnetic at the departure end (variation 15E). At 120 knots that is 6 h 52 min at the quickest height in today's winds (24,000 ft, a 8-knot tailwind), arriving about 11:24 pm PDT (06:24 UTC), after sunset at the destination. Right now BFI is VFR, wind variable at 4 knots; TRM is VFR, wind from the south-southwest (200°) at 5 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: 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
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 25,000 ft to 39,000 ft. Over the first 0 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 14,000 ft. Over the route from 140 to 220 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 190 to 240 nm out.
- AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the route from 570 to 700 nm out.
- AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the last 170 nm of the route.
- AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 730 to 830 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 790 to 840 nm out.
- AIRMET SIERRA 6E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Near the route, at the destination end.
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 BFI.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- E75L at 10,000 ft, 38 nm southwest, 3:04 pm PDT (22:04 UTC): moderate rime icing, -9 °C, remarks: from 10,000 ft to 7,500 ft during the descent. 80 nm along the route, 38 nm southwest of the line.
as filed, and in English
PDX UA /OV PDX360025/TM 2204/FL100/TP E75L/TA M9/IC MOD RIME /RM 100-075 DURD
- Report
- a routine report filed through PDX
- Where
- 25 nm north (360°) of PDX
- Time
- 22:04 UTC
- Height
- at 10,000 ft
- Aircraft
- E75L
- Temperature
- −9 °C
- Icing
- moderate rime
- Remarks
- from 10,000 ft to 7,500 ft during the descent
- E75L at 18,000 ft, 41 nm west, 4:24 pm PDT (23:24 UTC): moderate turbulence from 18,000 ft to 22,000 ft, remarks: mountain wave a 10-knot loss of airspeed entered by zoa fdcs. 620 nm along the route, 41 nm west of the line.
as filed, and in English
LOL UA /OV BIH300011/TM 2324/FL 180/TP E75L/TB MOD 180-220/RM MTN WAVE /-10 ENTERED BY ZOA FDCS AWC-WEB
- Report
- a routine report filed through LOL
- Where
- 11 nm northwest (300°) of BIH
- Time
- 23:24 UTC
- Height
- at 18,000 ft
- Aircraft
- E75L
- Turbulence
- moderate from 18,000 ft to 22,000 ft
- Remarks
- mountain wave a 10-knot loss of airspeed entered by zoa fdcs
- CL30 at 24,000 ft, 6 nm northeast, 2:00 pm PDT (21:00 UTC): moderate clear-air turbulence from 19,000 ft to 24,000 ft, light rime icing, -3 °C, remarks: during the climb zlawc. 810 nm along the route, 6 nm northeast of the line.
as filed, and in English
DAG UA /OV HEC/TM 2100/FL240/TP CL30/TA M03/TB MOD CAT OCNL 190-240/IC LGT RIME/RM DURC ZLAWC AWC-WEB
- Report
- a routine report filed through DAG
- Where
- over HEC
- Time
- 21:00 UTC
- Height
- at 24,000 ft
- Aircraft
- CL30
- Temperature
- −3 °C
- Turbulence
- moderate clear-air turbulence occasional from 19,000 ft to 24,000 ft
- Icing
- light rime
- Remarks
- during the climb zlawc
- C182 at 8,000 ft, 36 nm west, 3:52 pm PDT (22:52 UTC): light rime icing, -2 °C. 100 nm along the route, 36 nm west of the line.
as filed, and in English
PDX UA /OV PDX040017/TM 2252/FL080/TP C182/TA M02/IC LGT RIME
- Report
- a routine report filed through PDX
- Where
- 17 nm northeast (040°) of PDX
- Time
- 22:52 UTC
- Height
- at 8,000 ft
- Aircraft
- C182
- Temperature
- −2 °C
- Icing
- light rime
- E75L at 33,000 ft, 36 nm east, 1:40 pm PDT (20:40 UTC): light to moderate chop turbulence, remarks: zse. 120 nm along the route, 36 nm east of the line.
as filed, and in English
DLS UA /OV LTJ053027/TM 2040/FL330/TP E75L/TB LGT OCNL MOD CHOP /RM ZSE
- Report
- a routine report filed through DLS
- Where
- 27 nm northeast (053°) of LTJ
- Time
- 20:40 UTC
- Height
- at 33,000 ft
- Aircraft
- E75L
- Turbulence
- light occasional moderate chop
- Remarks
- zse
- E75L at 9,500 ft, 23 nm southwest, 4:07 pm PDT (23:07 UTC): light rime icing from 7,000 ft to 9,500 ft, a broken layer above 7,300 ft, -2 °C, remarks: during the descent runway 5. 200 nm along the route, 23 nm southwest of the line.
as filed, and in English
RDM UA /OV RDM/TM 2307/FL095/TP E75L/SK BKN073-TOPSUNKN/TA M2/IC LGT RIME 095-070/RM DURD RWY 5
- Report
- a routine report filed through RDM
- Where
- over RDM
- Time
- 23:07 UTC
- Height
- at 9,500 ft
- Aircraft
- E75L
- Sky
- a broken layer from 7,300 ft, tops unknown
- Temperature
- −2 °C
- Icing
- light rime from 9,500 ft to 7,000 ft
- Remarks
- during the descent runway 5
- E170 at 10,000 ft, 23 nm southwest, 3:02 pm PDT (22:02 UTC): light rime icing from 7,000 ft to 10,000 ft. 200 nm along the route, 23 nm southwest of the line.
as filed, and in English
RDM UA /OV RDM/TM 2202/FL100/TP E170/SK BASE 065-TOPS UNKN/TA UNKN/IC LGT RIME 100-070
- Report
- a routine report filed through RDM
- Where
- over RDM
- Time
- 22:02 UTC
- Height
- at 10,000 ft
- Aircraft
- E170
- Sky
- base 065-TOPS unknown
- Temperature
- UNKN
- Icing
- light rime from 10,000 ft to 7,000 ft
- E75L at 9,000 ft, 32 nm west, 4:05 pm PDT (23:05 UTC): light rime icing, -6 °C, remarks: zse. 210 nm along the route, 32 nm west of the line.
as filed, and in English
RDM UA /OV DSD155012/TM 2305/FL090/TP E75L/TA M06/IC LGT RIME/RM ZSE
- Report
- a routine report filed through RDM
- Where
- 12 nm southeast (155°) of DSD
- Time
- 23:05 UTC
- Height
- at 9,000 ft
- Aircraft
- E75L
- Temperature
- −6 °C
- Icing
- light rime
- Remarks
- zse
- PC24 at 40,000 ft, 40 nm east, 4:10 pm PDT (23:10 UTC): light to moderate turbulence. 390 nm along the route, 40 nm east of the line.
as filed, and in English
LOL UA /OV SDO291023/TM 2310/FL400/TP PC24/TB LGT OCNL MOD /ZLC
- Report
- a routine report filed through LOL
- Where
- 23 nm west (291°) of SDO
- Time
- 23:10 UTC
- Height
- at 40,000 ft
- Aircraft
- PC24
- Turbulence
- light occasional moderate zlc
- E75L at 29,000 ft, 13 nm east, 2:03 pm PDT (21:03 UTC): light to moderate chop turbulence. 470 nm along the route, 13 nm east of the line.
as filed, and in English
WMC UA /OV WMC200050/TM 2103/FL290/TP E75L/TB CONS LGT OCNL MOD CHOP /ZLC
- Report
- a routine report filed through WMC
- Where
- 50 nm south (200°) of WMC
- Time
- 21:03 UTC
- Height
- at 29,000 ft
- Aircraft
- E75L
- Turbulence
- continuous light occasional moderate chop zlc
- B38M at 37,000 ft, 21 nm east, 3:25 pm PDT (22:25 UTC): -41 °C, wind 215° at 61 knots, remarks: produced by skypath. 670 nm along the route, 21 nm east 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
- EPIC at 16,000 ft, 34 nm west, 1:48 pm PDT (20:48 UTC): light rime icing, -10 °C, remarks: zlawc. 770 nm along the route, 34 nm west of the line.
as filed, and in English
LAX UA /OV LAX016092/TM 2048/FL160/TP EPIC/TA M10/IC LGT RIME/RM ZLAWC AWC-WEB
- Report
- a routine report filed through LAX
- Where
- 92 nm north (016°) of LAX
- Time
- 20:48 UTC
- Height
- at 16,000 ft
- Aircraft
- EPIC
- Temperature
- −10 °C
- Icing
- light rime
- Remarks
- zlawc
- BCS3 at 31,000 ft, 38 nm east, 3:44 pm PDT (22:44 UTC): remarks: mountain wave 20 kts/zlawc. 780 nm along the route, 38 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
- A20N at 23,000 ft, 45 nm east, 2:37 pm PDT (21:37 UTC): light rime icing from 21,000 ft to 23,000 ft, -21 °C, remarks: during the climb zlawc. 780 nm along the route, 45 nm east of the line.
as filed, and in English
CDC UA /OV LAS210050/TM 2137/FL230/TP A20N/TA M21/IC LGT RIME 210-230/RM DURC ZLAWC AWC-WEB
- Report
- a routine report filed through CDC
- Where
- 50 nm southwest (210°) of LAS
- Time
- 21:37 UTC
- Height
- at 23,000 ft
- Aircraft
- A20N
- Temperature
- −21 °C
- Icing
- light rime from 21,000 ft to 23,000 ft
- Remarks
- during the climb zlawc
2 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 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 10 forecast points nearest it (SEA, YKM, PDX, RDM, LKV, RNO, BIH, 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 |
|---|---|---|---|---|---|---|
| 5,500 ft | 290° at 3 kt | −2 kt | 4 °C | 122 kt | 7 h 13 min | 11:45 pm PDT (06:45 UTC) |
| 7,500 ft | 320° at 4 kt | −4 kt | -1 °C | 124 kt | 7 h 06 min | 11:38 pm PDT (06:38 UTC) |
| 9,500 ft | 290° at 5 kt | −3 kt | -2 °C | 123 kt | 7 h 09 min | 11:41 pm PDT (06:41 UTC) |
| 11,500 ft | 250° at 7 kt | 0 | -6 °C | 120 kt | 7 h 20 min | 11:52 pm PDT (06:52 UTC) |
| 13,500 ft | 250° at 8 kt | 0 | -10 °C | 120 kt | 7 h 20 min | 11:52 pm PDT (06:52 UTC) |
| 15,500 ft | 260° at 8 kt | −1 kt | -13 °C | 121 kt | 7 h 16 min | 11:48 pm PDT (06:48 UTC) |
| 17,500 ft | 270° at 8 kt | −1 kt | -16 °C | 121 kt | 7 h 16 min | 11:48 pm PDT (06:48 UTC) |
| 18,000 ft FL180 | 270° at 7 kt | −1 kt | -17 °C | 121 kt | 7 h 16 min | 11:48 pm PDT (06:48 UTC) |
| 24,000 ft FL240 | 290° at 14 kt | −8 kt | -25 °C | 128 kt | 6 h 52 min | 11:24 pm PDT (06:24 UTC) |
| 30,000 ft FL300 | 260° at 22 kt | −4 kt | -31 °C | 124 kt | 7 h 06 min | 11:38 pm PDT (06:38 UTC) |
| 34,000 ft FL340 | 240° at 26 kt | +4 kt | -35 °C | 116 kt | 7 h 35 min | 12:07 am PDT (07:07 UTC) |
| 39,000 ft FL390 | 240° at 30 kt | +6 kt | -42 °C | 114 kt | 7 h 43 min | 12:15 am PDT (07:15 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SEA | used from 0 nm out; 21 nm from the line | 360/9 | 350/10 1° | 010/10 -5° | 030/20 -11° | 020/60 -17° | 010/86 -26° | 360/90 -40° | 010/68 -42° | 360/31 -43° |
| YKM | used from 50 nm out; 48 nm from the line | 030/16 | 020/18 0° | 030/30 -8° | 030/23 -13° | 020/40 -23° | 010/73 -29° | 010/54 -36° | 360/29 -37° | 330/16 -40° |
| PDX | used from 100 nm out; 56 nm from the line | 330/7 | 360/13 0° | 040/22 -6° | 030/23 -12° | 020/64 -18° | 010/93 -25° | 010/91 -39° | 360/62 -40° | 350/41 -43° |
| RDM | used from 150 nm out; 35 nm from the line | 010/15 -2° | 030/21 -8° | 020/26 -12° | 020/46 -22° | 010/72 -27° | 360/47 -34° | 340/31 -35° | 320/20 -40° | |
| LKV | used from 250 nm out; 65 nm from the line | 010/18 -6° | 280/7 -11° | 290/9 -22° | 280/13 -27° | 290/20 -31° | 260/19 -34° | 260/27 -39° | ||
| RNO | used from 400 nm out; 88 nm from the line | 320/7 | 260/13 1° | 230/21 -7° | 210/38 -17° | 220/43 -26° | 230/54 -29° | 230/59 -32° | 230/54 -41° | |
| BIH | used from 550 nm out; 69 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° | |
| LAS | used from 700 nm out; 93 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 750 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 800 nm out; 62 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 |
|---|---|---|---|---|---|---|---|
| BFI Seattle, WA | departure | VFR Sky: a few clouds at 5,000 feet | variable at 4 knots | 10+ mi | none | 21 ft | 3:53 pm PDT (22:53 UTC) |
| PLU Puyallup, WA | 20 nm out, 9 nm southwest of the line | VFR Weather: light drizzle | from the north (010°) at 6 knots | 10+ mi | none | 537 ft | 23:15 UTC |
| DLS The Dalles, OR | 120 nm out, 6 nm east of the line | VFR Sky: overcast at 9,500 feet | from the west-northwest (300°) at 3 knots | 10+ mi | 9,500 ft | 246 ft | 22:53 UTC |
| RDM Redmond, OR | 200 nm out, 23 nm southwest of the line, tower | VFR Sky: a broken layer at 3,200 feet, a broken layer at 4,200 feet, overcast at 7,500 feet | from the north-northwest (340°) at 10 knots | 10+ mi | 3,200 ft | 3,081 ft | 22:56 UTC |
| LOL Lovelock, NV | 480 nm out, 6 nm northeast of the line | VFR Sky: a few clouds at 12,000 feet | from the northeast (040°) at 12 knots, gusting to 20 | 10+ mi | none | 3,907 ft | 22:53 UTC |
| GAB Gabbs, NV | 550 nm out, 10 nm east of the line | no report just now | 4,699 ft | ||||
| PSP Palm Springs, CA | 860 nm out, 14 nm southwest of the line, tower | VFR | from the north-northwest (330°) at 12 knots, gusting to 17 | 10+ mi | none | 476 ft | 22:53 UTC |
| TRM Palm Springs, CA | destination | VFR | from the south-southwest (200°) at 5 knots | 10+ mi | none | -114 ft | 3:52 pm PDT (22:52 UTC) |
The highest airport on this list sits at 4,699 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At TRM when you get there the forecast at the estimated arrival, 11:24 pm PDT (06:24 UTC)
Wind from the northwest at 10 knots, visibility more than 6 miles, scattered clouds at 10,000 feet VFR
The whole forecast for TRM
- From Sun 5:00 pm PDT (00:00 UTC): wind from the northwest at 10 knots, visibility more than 6 miles, scattered clouds at 10,000 feet
- From Mon 1:00 am PDT (08:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 10,000 feet
- From Mon 2:00 pm PDT (21:00 UTC): wind from the west at 12 knots, visibility more than 6 miles, a few clouds at 10,000 feet
The forecast for BFI, the departure
- From Sun 11:00 am PDT (18:00 UTC): wind from the north at 5 knots, visibility more than 6 miles, a few clouds at 10,000 feet
- From Sun 2:00 pm PDT (21:00 UTC): wind from the north-northwest at 9 knots, visibility more than 6 miles, scattered clouds at 20,000 feet
- From Sun 7:00 pm PDT (02:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
- From Mon 2:00 am PDT (09:00 UTC): wind from the southeast at 2 knots, visibility more than 6 miles, patches of fog, clear skies
- From Mon 9:00 am PDT (16:00 UTC): wind from the south-southeast at 3 knots, visibility more than 6 miles, clear skies
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 4 nm from the route, at the destination end · security · until 12 October · ZLA
Daylight
Sunset at BFI 6:27 pm PDT (01:27 UTC), at TRM 6:14 pm PDT (01:14 UTC) (civil twilight ends 6:39 pm PDT (01:39 UTC)). At 120 knots the arrival at TRM is before sunrise there (6:46 am PDT (13:46 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: Boeing Fld/King County International, Jacqueline Cochran Regional.