Plan a flight · Sun 6:49 pm PDT (01:49 UTC)

Boeing Fld/King County International to Los Angeles International BFI → LAX

835 nautical miles (960 statute miles) south on a straight line, true course 166°, about 151° magnetic at the departure end (variation 15E). At 120 knots that is 6 h 25 min at the quickest height in today's winds (24,000 ft, a 10-knot tailwind), arriving about 1:14 am PDT (08:14 UTC), after sunset at the destination. Right now BFI is VFR, wind from the northwest (310°) at 6 knots; LAX is VFR, wind from the west-southwest (240°) at 8 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: 73 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 18,000 ft to 39,000 ft. Over the first 407 nm of the route.
AIRMET ZULU 2C: moderate icing up to 16,000 ft. Over the route from 199 to 268 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 229 to 248 nm out.
AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the route from 556 to 636 nm out.
AIRMET SIERRA 6E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 60 nm of the route.
AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. 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 18,000 ft, 35 nm east, 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. 626 nm along the route, 35 nm east 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
PC12 at 13,000 ft, 20 nm northeast, 5:42 pm PDT (00:42 UTC): remarks: zse. 50 nm along the route, 20 nm northeast of the line.
as filed, and in English
```
YKM UA /OV YKM270050/TM 0042/FL130/TP PC12/SK TOP130/RM -ZSE
```
Report
a routine report filed through YKM
Where
50 nm west (270°) of YKM
Time
00:42 UTC
Height
at 13,000 ft
Aircraft
PC12
Sky
TOP130
Remarks
zse
PC12 at 15,000 ft, 20 nm northeast, 5:42 pm PDT (00:42 UTC): remarks: zse. 50 nm along the route, 20 nm northeast of the line.
as filed, and in English
```
YKM UA /OV YKM270050/TM 0042/FL150/TP PC12/SK TOP130/RM -ZSE
```
Report
a routine report filed through YKM
Where
50 nm west (270°) of YKM
Time
00:42 UTC
Height
at 15,000 ft
Aircraft
PC12
Sky
TOP130
Remarks
zse
C182 at 8,000 ft, 24 nm west, 3:52 pm PDT (22:52 UTC): light rime icing, -2 °C. 109 nm along the route, 24 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
B738 at 11,000 ft, 4 nm southeast, 6:19 pm PDT (01:19 UTC): light rime icing, remarks: during the descent runway 5. 199 nm along the route, 4 nm southeast of the line.
as filed, and in English
```
RDM UA /OV RDM/TM 0119/FL110/TP B738/TA UNKN/IC LGT RIME/RM DURD RWY 5
```
Report
a routine report filed through RDM
Where
over RDM
Time
01:19 UTC
Height
at 11,000 ft
Aircraft
B738
Temperature
UNKN
Icing
light rime
Remarks
during the descent runway 5
E75L at 11,000 ft, 4 nm southeast, 6:16 pm PDT (01:16 UTC): light rime icing, remarks: during the descent runway 29. 199 nm along the route, 4 nm southeast of the line.
as filed, and in English
```
RDM UA /OV RDM/TM 0116/FL110/TP E75L/TA UNKN/IC LGT RIME/RM DURD RWY 29
```
Report
a routine report filed through RDM
Where
over RDM
Time
01:16 UTC
Height
at 11,000 ft
Aircraft
E75L
Temperature
UNKN
Icing
light rime
Remarks
during the descent runway 29
E175 at 6,500 ft, 4 nm southeast, 5:28 pm PDT (00:28 UTC): a broken layer above 6,500 ft. 199 nm along the route, 4 nm southeast of the line.
as filed, and in English
```
RDM UA /OV RDM/TM 0028/FL065/TP E175/SK BKN065-TOPSUNKN
```
Report
a routine report filed through RDM
Where
over RDM
Time
00:28 UTC
Height
at 6,500 ft
Aircraft
E175
Sky
a broken layer from 6,500 ft, tops unknown
E75L at 9,500 ft, 4 nm southeast, 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. 199 nm along the route, 4 nm southeast 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
E75L at 11,000 ft, 9 nm east, 5:36 pm PDT (00:36 UTC): trace to light rime icing from 10,500 ft to 11,500 ft, -8 °C, remarks: durc-zse. 209 nm along the route, 9 nm east of the line.
as filed, and in English
```
RDM UA /OV DSD090015/TM 0036/FL110/TP E75L/TA M08/IC TRACE-LGT RIME 105-115/RM DURC-ZSE
```
Report
a routine report filed through RDM
Where
15 nm east (090°) of DSD
Time
00:36 UTC
Height
at 11,000 ft
Aircraft
E75L
Temperature
−8 °C
Icing
trace-lgt rime from 10,500 ft to 11,500 ft
Remarks
durc-zse
E75L at 9,000 ft, 7 nm southwest, 4:05 pm PDT (23:05 UTC): light rime icing, -6 °C, remarks: zse. 209 nm along the route, 7 nm southwest 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
E75L at 35,000 ft, 8 nm east, 6:18 pm PDT (01:18 UTC): light to moderate chop turbulence, remarks: zse. 308 nm along the route, 8 nm east of the line.
as filed, and in English
```
LKV UA /OV LKV/TM 0118/FL350/TP E75L/TB LGT OCNL MOD CHOP/RM ZSE
```
Report
a routine report filed through LKV
Where
over LKV
Time
01:18 UTC
Height
at 35,000 ft
Aircraft
E75L
Turbulence
light occasional moderate chop
Remarks
zse
B38M descending, 3 nm north, 6:28 pm PDT (01:28 UTC): light chop turbulence, remarks: during the descent RY35L rno. 507 nm along the route, 3 nm north of the line.
as filed, and in English
```
RNO UA /OV KRNO167009/TM 0128/FLUNKN/TP B38M/TB OCNL LGT CHOP/RM DURD RY35L RNO
```
Report
a routine report filed through RNO
Where
9 nm south (167°) of KRNO
Time
01:28 UTC
Height
height not given
Aircraft
B38M
Turbulence
occasional light chop
Remarks
during the descent RY35L rno
B739 at 33,000 ft, 25 nm east, 4:01 pm PDT (23:01 UTC): remarks: mountain wave 10 knots zlawc. 795 nm along the route, 25 nm east of the line.
as filed, and in English
```
SDB UA /OV PMD/TM 2301/FL330/TP B739/RM MTN WAVE /- 10 KT /ZLAWC AWC-WEB
```
Report
a routine report filed through SDB
Where
over PMD
Time
23:01 UTC
Height
at 33,000 ft
Aircraft
B739
Remarks
mountain wave 10 knots zlawc
B739 at 33,000 ft, 42 nm east, 4:02 pm PDT (23:02 UTC): remarks: mountain wave 10 knots zlawc. At the destination end, 42 nm east of the line.
as filed, and in English
```
DRA UA /OV VCV242015/TM 2302/FL330/TP B739/RM MTN WAVE /- 10 KT /ZLAWC AWC-WEB
```
Report
a routine report filed through DRA
Where
15 nm southwest (242°) of VCV
Time
23:02 UTC
Height
at 33,000 ft
Aircraft
B739
Remarks
mountain wave 10 knots zlawc

11 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 8 forecast points nearest it (SEA, PDX, RDM, LKV, RNO, BIH, FAT, WJF). 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	280° at 5 kt	−1 kt	4 °C	121 kt	6 h 54 min	1:43 am PDT (08:43 UTC)
7,500 ft	310° at 5 kt	−4 kt	-1 °C	124 kt	6 h 44 min	1:33 am PDT (08:33 UTC)
9,500 ft	290° at 5 kt	−2 kt	-2 °C	122 kt	6 h 51 min	1:40 am PDT (08:40 UTC)
11,500 ft	250° at 7 kt	+1 kt	-6 °C	119 kt	7 h 01 min	1:50 am PDT (08:50 UTC)
13,500 ft	260° at 7 kt	0	-10 °C	120 kt	6 h 58 min	1:47 am PDT (08:47 UTC)
15,500 ft	280° at 7 kt	−2 kt	-13 °C	122 kt	6 h 51 min	1:40 am PDT (08:40 UTC)
17,500 ft	290° at 7 kt	−4 kt	-17 °C	124 kt	6 h 44 min	1:33 am PDT (08:33 UTC)
18,000 ft FL180	300° at 7 kt	−4 kt	-17 °C	124 kt	6 h 44 min	1:33 am PDT (08:33 UTC)
24,000 ft FL240	300° at 15 kt	−10 kt	-25 °C	130 kt	6 h 25 min	1:14 am PDT (08:14 UTC)
30,000 ft FL300	280° at 21 kt	−6 kt	-31 °C	126 kt	6 h 38 min	1:27 am PDT (08:27 UTC)
34,000 ft FL340	250° at 23 kt	+2 kt	-35 °C	118 kt	7 h 05 min	1:54 am PDT (08:54 UTC)
39,000 ft FL390	250° at 29 kt	+5 kt	-42 °C	115 kt	7 h 16 min	2:05 am PDT (09:05 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; 20 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°
PDX	used from 50 nm out; 53 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 149 nm out; 29 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 248 nm out; 59 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 397 nm out; 72 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 546 nm out; 74 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°
FAT	used from 646 nm out; 33 nm from the line	180/7	170/9 7°	200/20 3°	210/27 -3°	240/27 -14°	230/38 -24°	220/57 -27°	230/42 -33°	230/41 -44°
WJF	used from 695 nm out; 71 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°

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	from the northwest (310°) at 6 knots	10+ mi	none	21 ft	5:53 pm PDT (00:53 UTC)
PLU Puyallup, WA	30 nm out, 7 nm northwest of the line	VFR Weather: light drizzle	calm	10+ mi	none	537 ft	23:35 UTC
CZK Cascade Locks, OR	109 nm out, 9 nm southwest of the line	no report just now				151 ft
RDM Redmond, OR	199 nm out, 4 nm southeast of the line, tower	VFR Sky: overcast at 6,500 feet	from the north (350°) at 8 knots	10+ mi	6,500 ft	3,081 ft	00:56 UTC
LKV Lakeview, OR	328 nm out, 8 nm east of the line	VFR	from the north-northeast (020°) at 14 knots	10+ mi	none	4,734 ft	00:53 UTC
AAT Alturas, CA	368 nm out, 9 nm southwest of the line	VFR	from the north (010°) at 10 knots, gusting to 19	10+ mi	none	4,378 ft	00:55 UTC
RNO Reno, NV	497 nm out, 3 nm northeast of the line, tower	VFR Sky: scattered clouds at 9,000 feet	from the north (360°) at 14 knots, gusting to 22	10+ mi	none	4,414 ft	00:55 UTC
MEV Minden, NV	527 nm out, 4 nm northwest of the line	no report just now				4,723 ft
MMH Mammoth Lakes, CA	616 nm out, 22 nm east of the line	VFR Sky: scattered clouds at 9,000 feet	from the southeast (140°) at 19 knots, gusting to 30	10+ mi	none	7,134 ft	23:35 UTC
BFL Bakersfield, CA	745 nm out, 15 nm west of the line, tower	VFR Weather: haze	from the northwest (320°) at 14 knots	6 mi	none	509 ft	00:54 UTC
VNY Van Nuys, CA	815 nm out, 3 nm south of the line, tower	VFR Sky: scattered clouds at 5,500 feet, scattered clouds at 11,000 feet	from the south (190°) at 10 knots	10+ mi	none	802 ft	00:51 UTC
LAX Los Angeles, CA	destination	VFR Sky: scattered clouds at 3,600 feet, a broken layer at 4,900 feet	from the west-southwest (240°) at 8 knots	10+ mi	4,900 ft	127 ft	5:53 pm PDT (00:53 UTC)

The highest airport on this list sits at 7,134 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At LAX when you get there the forecast at the estimated arrival, 1:14 am PDT (08:14 UTC)

Wind from the southwest at 6 knots, visibility more than 6 miles, a broken layer at 5,000 feet, overcast at 10,000 feet VFR

30% chance between Sun 9:00 pm PDT (04:00 UTC) and 3:00 am PDT (10:00 UTC): light rain showers

The whole forecast for LAX

From Sun 6:00 pm PDT (01:00 UTC): wind from the west-southwest at 10 knots, visibility more than 6 miles, scattered clouds at 4,000 feet, a broken layer at 10,000 feet
From Sun 9:00 pm PDT (04:00 UTC): wind from the southwest at 6 knots, visibility more than 6 miles, a broken layer at 5,000 feet, overcast at 10,000 feet
30% chance between Sun 9:00 pm PDT (04:00 UTC) and 3:00 am PDT (10:00 UTC): light rain showers
From Mon 4:00 am PDT (11:00 UTC): wind light and variable, visibility more than 6 miles, a broken layer at 5,000 feet, overcast at 10,000 feet
30% chance between Mon 4:00 am PDT (11:00 UTC) and 10:00 am PDT (17:00 UTC): light rain showers
From Mon 10:00 am PDT (17:00 UTC): wind from the west-southwest at 15 knots, visibility more than 6 miles, a broken layer at 5,000 feet, overcast at 10,000 feet
30% chance between Mon 10:00 am PDT (17:00 UTC) and 4:00 pm PDT (23:00 UTC): light rain showers
From Mon 6:00 pm PDT (01:00 UTC): wind from the west at 10 knots, visibility more than 6 miles, a broken layer at 5,000 feet, overcast at 10,000 feet

The forecast for BFI, the departure

From Sun 5:00 pm PDT (00:00 UTC): wind from the north-northwest at 8 knots, gusting to 18, visibility more than 6 miles, a few clouds at 5,000 feet
From Sun 7:00 pm PDT (02:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
From Mon 3:00 am PDT (10:00 UTC): wind light and variable, 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
From Mon 12:00 pm PDT (19:00 UTC): wind from the west-southwest at 3 knots, visibility more than 6 miles, clear skies
From Mon 2:00 pm PDT (21:00 UTC): wind from the west at 5 knots, visibility more than 6 miles, clear skies

Temporary flight restrictions on the line or within 25 nm of it

6/7094 45NM NE MERCED, CA, Sunday, October 4, 2026 through Tuesday, October 20, 2026 UTC 7 nm from the route, 606 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 20 October · ZOA
6/8783 38NM NE BAKERSFIELD, CA, Saturday, October 10, 2026 through Friday, October 23, 2026 UTC 19 nm from the route, 735 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 23 October · ZLA
4/3635 DISNEYLAND THEME PARK, ANAHEIM,, CA 23 nm from the route, at the destination end · security · ZLA

Daylight

Sunset at BFI 6:27 pm PDT (01:27 UTC), at LAX 6:23 pm PDT (01:23 UTC) (civil twilight ends 6:48 pm PDT (01:48 UTC)). At 120 knots the arrival at LAX is before sunrise there (6:56 am PDT (13:56 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 Northwest · loop National Weather Service

Radar now, the Pacific Southwest · 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: Boeing Fld/King County International, Los Angeles International.