Plan a flight · Mon 12:27 am PDT (07:27 UTC)

Palm Springs International to Seattle-Tacoma International PSP → SEA

859 nautical miles (988 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 52 min at the quickest height in today's winds (39,000 ft, a 5-knot tailwind), arriving about 7:19 am PDT (14:19 UTC), after sunset at the destination. Right now PSP is VFR, wind calm; SEA is VFR, wind from the east-southeast (120°) at 7 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: 3,361 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 W16W: thunderstorms (a convective SIGMET) up to 27,000 ft, moving from the southwest at 20 knots, until 1:55 am PDT (08:55 UTC). Near the route, 280 nm along the route.
as issued
```
WSUS33 KKCI 120655
MKCW WST 120655
CONVECTIVE SIGMET 16W
VALID UNTIL 0855Z
UT NV
FROM 50NW BVL-20NE BVL-40SE OAL-20N OAL-50NW BVL
AREA TS MOV FROM 24020KT. TOPS TO FL270.
```
AIRMET TANGO 2W: moderate turbulence above 18,000 ft from 35,000 ft to 45,000 ft. Over the first 10 nm of the route.
AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the first 190 nm of the route.
AIRMET TANGO 3W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 160 to 160 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 429 nm of the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 609 to 659 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

PC12 at 17,000 ft, 12 nm east, 9:52 pm PDT (04:52 UTC): moderate turbulence, moderate rime icing, -15 °C, remarks: entered by zoa fdcs. 260 nm along the route, 12 nm east of the line.
as filed, and in English
```
TPH UA /OV OAL/TM 0452/FL 170/TP PC12/TA M15/TB MOD/IC MOD RIME/RM ENTERED BY ZOA FDCS AWC-WEB
```
Report
a routine report filed through TPH
Where
over OAL
Time
04:52 UTC
Height
at 17,000 ft
Aircraft
PC12
Temperature
−15 °C
Turbulence
moderate
Icing
moderate rime
Remarks
entered by zoa fdcs
B38M at 3,000 ft, 44 nm west, 10:47 pm PDT (05:47 UTC): a broken layer from 2,900 ft to 8,000 ft, remarks: BASE030. At the departure end, 44 nm west of the line.
as filed, and in English
```
ONT UA /OV KONT080005/TM 0547/FL030/TP B38M/SK BKN029-TOP080/RM BASE030
```
Report
a routine report filed through ONT
Where
5 nm east (080°) of KONT
Time
05:47 UTC
Height
at 3,000 ft
Aircraft
B38M
Sky
a broken layer from 2,900 ft, tops 8,000 ft
Remarks
BASE030
A321 at 3,300 ft, 41 nm west, 9:59 pm PDT (04:59 UTC): a broken layer above 3,300 ft, remarks: during the descent. At the departure end, 41 nm west of the line.
as filed, and in English
```
ONT UA /OV ONT078008/TM 0459/FL033/TP A321/SK BKN033-TOPUNKN/RM DURD
```
Report
a routine report filed through ONT
Where
8 nm east (078°) of ONT
Time
04:59 UTC
Height
at 3,300 ft
Aircraft
A321
Sky
a broken layer from 3,300 ft, tops unknown
Remarks
during the descent

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 8 forecast points nearest it (ONT, WJF, BIH, RNO, LKV, RDM, PDX, 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	090° at 1 kt	−1 kt	2 °C	121 kt	7 h 06 min	7:33 am PDT (14:33 UTC)
6,500 ft	060° at 1 kt	0	2 °C	120 kt	7 h 10 min	7:37 am PDT (14:37 UTC)
8,500 ft	340° at 3 kt	+3 kt	-4 °C	117 kt	7 h 21 min	7:48 am PDT (14:48 UTC)
10,500 ft	310° at 3 kt	+2 kt	-5 °C	118 kt	7 h 17 min	7:44 am PDT (14:44 UTC)
12,500 ft	290° at 3 kt	+2 kt	-9 °C	118 kt	7 h 17 min	7:44 am PDT (14:44 UTC)
14,500 ft	310° at 5 kt	+4 kt	-11 °C	116 kt	7 h 24 min	7:51 am PDT (14:51 UTC)
16,500 ft	320° at 8 kt	+7 kt	-15 °C	113 kt	7 h 36 min	8:03 am PDT (15:03 UTC)
18,000 ft FL180	330° at 10 kt	+9 kt	-17 °C	111 kt	7 h 44 min	8:11 am PDT (15:11 UTC)
24,000 ft FL240	330° at 21 kt	+20 kt	-24 °C	100 kt	8 h 35 min	9:02 am PDT (16:02 UTC)
30,000 ft FL300	310° at 21 kt	+18 kt	-32 °C	102 kt	8 h 25 min	8:52 am PDT (15:52 UTC)
34,000 ft FL340	280° at 20 kt	+7 kt	-37 °C	113 kt	7 h 36 min	8:03 am PDT (15:03 UTC)
39,000 ft FL390	240° at 28 kt	−5 kt	-42 °C	125 kt	6 h 52 min	7:19 am PDT (14:19 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; 49 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 50 nm out; 66 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 150 nm out; 61 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°
RNO	used from 300 nm out; 69 nm from the line		010/9	320/10 -2°	210/23 -9°	210/34 -19°	220/36 -25°	230/31 -29°	230/41 -33°	230/38 -42°
LKV	used from 449 nm out; 64 nm from the line			010/8 -8°	350/13 -11°	340/21 -21°	360/60 -26°	350/37 -32°	310/26 -35°	260/25 -39°
RDM	used from 599 nm out; 42 nm from the line		040/17 -1°	030/31 -8°	010/29 -12°	010/61 -19°	360/95 -25°	360/82 -36°	360/40 -37°	310/19 -40°
PDX	used from 699 nm out; 60 nm from the line	L/V	030/7 1°	020/12 -6°	020/29 -9°	010/69 -16°	010/81 -25°	360/83 -40°	360/67 -46°	320/29 -42°
SEA	used from 799 nm out; 35 nm from the line	050/7	050/11 1°	050/12 -5°	030/31 -7°	010/61 -15°	010/69 -26°	360/73 -40°	360/62 -47°	330/21 -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	VFR Sky: a broken layer at 7,000 feet	calm	10+ mi	7,000 ft	476 ft	11:53 pm PDT (06:53 UTC)
DAG Daggett, CA	60 nm out, 5 nm northeast of the line	VFR Sky: a few clouds at 11,000 feet	from the northwest (320°) at 10 knots	10+ mi	none	1,930 ft	06:50 UTC
HTH Hawthorne, NV	300 nm out, 17 nm west of the line	marginal VFR Sky: overcast at 2,100 feet Weather: haze	from the north-northwest (340°) at 5 knots	3 mi	2,100 ft	4,230 ft	07:15 UTC
FLX Fallon, NV	360 nm out, 6 nm southwest of the line	no report just now				3,966 ft
RDM Redmond, OR	659 nm out, 18 nm west of the line, tower	VFR	calm	10+ mi	none	3,081 ft	06:56 UTC
DLS The Dalles, OR	739 nm out, 8 nm northeast of the line	VFR Sky: overcast at 10,000 feet	from the west-southwest (240°) at 5 knots	10+ mi	10,000 ft	246 ft	06:53 UTC
PLU Puyallup, WA	839 nm out, 6 nm west of the line	VFR Weather: light drizzle	calm	10+ mi	none	537 ft	07:15 UTC
SEA Seattle, WA	destination	VFR	from the east-southeast (120°) at 7 knots	10+ mi	none	432 ft	11:53 pm PDT (06:53 UTC)

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 SEA when you get there the forecast at the estimated arrival, 7:19 am PDT (14:19 UTC)

Wind from the southeast at 4 knots, visibility more than 6 miles, patches of fog, clear skies VFR

The whole forecast for SEA

From Sun 11:00 pm PDT (06:00 UTC): wind from the east-northeast at 6 knots, visibility more than 6 miles, clear skies
From Mon 3:00 am PDT (10:00 UTC): wind from the southeast at 4 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 4 knots, visibility more than 6 miles, clear skies
From Mon 11:00 am PDT (18:00 UTC): wind from the west at 6 knots, visibility more than 6 miles, clear skies
From Mon 8:00 pm PDT (03:00 UTC): wind from the south at 4 knots, visibility more than 6 miles, scattered clouds at 25,000 feet

The forecast for PSP, the departure

From Sun 11:00 pm PDT (06:00 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 northwest at 11 knots, gusting to 18, visibility more than 6 miles, a few clouds at 10,000 feet

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 6:14 pm PDT (01:14 UTC), at SEA 6:25 pm PDT (01:25 UTC) (civil twilight ends 6:56 pm PDT (01:56 UTC)). At 120 knots the arrival at SEA 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

Radar now, the Pacific Southwest · loop National Weather Service

Radar now, the Pacific Northwest · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

Forecast chart, 24 hours ahead Weather Prediction Center

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, Seattle-Tacoma International.