Palm Springs International to Boeing Fld/King County International PSP → BFI
863 nautical miles (993 statute miles) north on a straight line, true course 344°, about 331° magnetic at the departure end (variation 13E). At 120 knots that is 6 h 54 min at the quickest height in today's winds (39,000 ft, a 5-knot tailwind), arriving about 1:39 am PDT (08:39 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: 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 5W: thunderstorms (a convective SIGMET) up to 33,000 ft, moving from the southwest at 20 knots, until 7:55 pm PDT (02:55 UTC). Over the route from 268 to 288 nm out.
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 TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the first 159 nm of the route.
- AIRMET SIERRA 6E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 40 nm of the route.
- AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 60 to 367 nm out.
- AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the route from 159 to 318 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 347 to 347 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 318 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 16,000 ft. Over the route from 585 to 695 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 595 to 655 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 PSP.
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 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 8 forecast points nearest it (ONT, WJF, BIH, RNO, LKV, RDM, YKM, SEA). 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 | 300° at 4 kt | +3 kt | 2 °C | 117 kt | 7 h 23 min | 2:08 am PDT (09:08 UTC) |
| 6,500 ft | 300° at 4 kt | +3 kt | 1 °C | 117 kt | 7 h 23 min | 2:08 am PDT (09:08 UTC) |
| 8,500 ft | 310° at 5 kt | +4 kt | -3 °C | 116 kt | 7 h 26 min | 2:11 am PDT (09:11 UTC) |
| 10,500 ft | 280° at 6 kt | +2 kt | -4 °C | 118 kt | 7 h 19 min | 2:04 am PDT (09:04 UTC) |
| 12,500 ft | 260° at 7 kt | 0 | -8 °C | 120 kt | 7 h 12 min | 1:57 am PDT (08:57 UTC) |
| 14,500 ft | 260° at 7 kt | +1 kt | -12 °C | 119 kt | 7 h 15 min | 2:00 am PDT (09:00 UTC) |
| 16,500 ft | 270° at 7 kt | +2 kt | -15 °C | 118 kt | 7 h 19 min | 2:04 am PDT (09:04 UTC) |
| 18,000 ft FL180 | 280° at 7 kt | +3 kt | -18 °C | 117 kt | 7 h 23 min | 2:08 am PDT (09:08 UTC) |
| 24,000 ft FL240 | 300° at 14 kt | +10 kt | -25 °C | 110 kt | 7 h 51 min | 2:36 am PDT (09:36 UTC) |
| 30,000 ft FL300 | 270° at 22 kt | +5 kt | -31 °C | 115 kt | 7 h 30 min | 2:15 am PDT (09:15 UTC) |
| 34,000 ft FL340 | 250° at 24 kt | −3 kt | -35 °C | 123 kt | 7 h 01 min | 1:46 am PDT (08:46 UTC) |
| 39,000 ft FL390 | 240° at 30 kt | −5 kt | -42 °C | 125 kt | 6 h 54 min | 1:39 am PDT (08:39 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; 49 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° |
| WJF | used from 50 nm out; 66 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° | |
| BIH | used from 149 nm out; 62 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° | |
| RNO | used from 298 nm out; 71 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° | |
| LKV | used from 446 nm out; 67 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° | ||
| RDM | used from 595 nm out; 46 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° | |
| YKM | used from 744 nm out; 52 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° |
| SEA | used from 794 nm out; 40 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° |
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 | 60 nm out, 5 nm northeast of the line | no report just now | 1,930 ft | ||||
| HTH Hawthorne, NV | 298 nm out, 18 nm west of the line | no report just now | 4,230 ft | ||||
| FLX Fallon, NV | 357 nm out, 6 nm west of the line | no report just now | 3,966 ft | ||||
| RDM Redmond, OR | 665 nm out, 20 nm southwest of the line, tower | no report just now | 3,081 ft | ||||
| DLS The Dalles, OR | 744 nm out, 8 nm east of the line | no report just now | 246 ft | ||||
| PLU Puyallup, WA | 843 nm out, 9 nm southwest of the line | no report just now | 537 ft | ||||
| BFI Seattle, WA | destination | no report just now | 21 ft |
The highest airport on this list sits at 4,230 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BFI when you get there the forecast at the estimated arrival, 1:39 am PDT (08:39 UTC)
BFI 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 BFI 6:27 pm PDT (01:27 UTC) (civil twilight ends 6:58 pm PDT (01:58 UTC)). At 120 knots the arrival at BFI is before sunrise there (7:23 am PDT (14:23 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, Boeing Fld/King County International.