Plan a flight · Sun 5:12 pm PDT (00:12 UTC)

Jack Northrop Fld/Hawthorne Municipal to Boeing Fld/King County International HHR → BFI

836 nautical miles (962 statute miles) north on a straight line, true course 349°, about 335° magnetic at the departure end (variation 14E). At 120 knots that is 6 h 45 min at the quickest height in today's winds (39,000 ft, a 4-knot tailwind), arriving about 11:57 pm PDT (06:57 UTC), after sunset at the destination. Right now HHR is VFR, wind from the west (270°) at 7 knots; BFI is VFR, wind variable at 6 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: 4 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 SIERRA 6E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 20 nm of the route.
AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the route from 20 to 60 nm out.
AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the route from 179 to 309 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 587 to 647 nm out.
AIRMET ZULU 2C: moderate icing up to 14,000 ft. Over the route from 627 to 677 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 25,000 ft to 39,000 ft. Over the last 0 nm of 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 HHR.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

B737 at 14,000 ft, 45 nm east, 2:54 pm PDT (21:54 UTC): moderate turbulence. At the departure end, 45 nm east of the line.
as filed, and in English
```
ONT UA /OV 20N ONT/TM 2154/FL140/TP B737/TB MOD
```
Report
a routine report filed through ONT
Where
20N ont
Time
21:54 UTC
Height
at 14,000 ft
Aircraft
B737
Turbulence
moderate
B738 descending, 45 nm east, 2:37 pm PDT (21:37 UTC): moderate chop turbulence. At the departure end, 45 nm east of the line.
as filed, and in English
```
ONT UA /OV ONT358021/TM 2137/FLDURD/TP B738/TB MODERATE CHOP STARTING AT 130
```
Report
a routine report filed through ONT
Where
21 nm north (358°) of ONT
Time
21:37 UTC
Height
during the descent
Aircraft
B738
Turbulence
moderate chop starting at at 13,000 ft
E75L at 18,000 ft, 33 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. 209 nm along the route, 33 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
E75L at 10,000 ft, 27 nm west, 3:04 pm PDT (22:04 UTC): moderate rime icing, -9 °C, remarks: from 10,000 ft to 7,500 ft during the descent. 747 nm along the route, 27 nm west 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
E75S at 5,000 ft, 12 nm southeast, 5:00 pm PDT (00:00 UTC): a routine report with nothing remarked on. At the departure end, 12 nm southeast of the line.
as filed, and in English
```
LGB UA /OV LGB180003/TM 0000/FL050/TP E75S/SK OVC43-TOP050
```
Report
a routine report filed through LGB
Where
3 nm south (180°) of LGB
Time
00:00 UTC
Height
at 5,000 ft
Aircraft
E75S
Sky
OVC43-TOP050
B739 at 3,400 ft, 5 nm east, 4:55 pm PDT (23:55 UTC): overcast above 5,400 ft, remarks: bases 3,500 ft. At the departure end, 5 nm east of the line.
as filed, and in English
```
KLAX UA /OV 10 E LAX/TM 2355/FL034/TP B739/SK OVC054/RM BASES 035
```
Report
a routine report filed through KLAX
Where
10 east lax
Time
23:55 UTC
Height
at 3,400 ft
Aircraft
B739
Sky
overcast from 5,400 ft
Remarks
bases 3,500 ft
C172 at 1,400 ft, 9 nm southeast, 3:53 pm PDT (22:53 UTC): remarks: base 3,400 ft. At the departure end, 9 nm southeast of the line.
as filed, and in English
```
TOA UA /OV 4 E KTOA/TM 2253/FL014/TP C172/RM BASE 034
```
Report
a routine report filed through TOA
Where
4 east KTOA
Time
22:53 UTC
Height
at 1,400 ft
Aircraft
C172
Remarks
base 3,400 ft
B757 at 4,000 ft, 5 nm east, 3:38 pm PDT (22:38 UTC): remarks: reduced visibility below the ceiling ILS25L. At the departure end, 5 nm east of the line.
as filed, and in English
```
LAX UA /OV LAX070010/TM 2238/FL040/TP B757/SK TOPS050 BASES040/RM REDUCED VISIBILITY BELOW THE CEILING. ILS25L
```
Report
a routine report filed through LAX
Where
10 nm east (070°) of LAX
Time
22:38 UTC
Height
at 4,000 ft
Aircraft
B757
Sky
TOPS050 BASES040
Remarks
reduced visibility below the ceiling ILS25L
B737 at 4,000 ft, 4 nm west, 3:37 pm PDT (22:37 UTC): a broken layer from 4,000 ft to 5,000 ft. At the departure end, 4 nm west of the line.
as filed, and in English
```
KLAX UA /OV KLAX/TM 2237/FL040/TP B737/SK BKN040-TOP050
```
Report
a routine report filed through KLAX
Where
over KLAX
Time
22:37 UTC
Height
at 4,000 ft
Aircraft
B737
Sky
a broken layer from 4,000 ft, tops 5,000 ft
B737 at 5,000 ft, 14 nm southeast, 3:30 pm PDT (22:30 UTC): a broken layer from 3,300 ft to 5,000 ft. At the departure end, 14 nm southeast of the line.
as filed, and in English
```
LGB UA /OV KLGB180005/TM 2230/FL050/TP B737/SK BKN033-TOPS050
```
Report
a routine report filed through LGB
Where
5 nm south (180°) of KLGB
Time
22:30 UTC
Height
at 5,000 ft
Aircraft
B737
Sky
a broken layer from 3,300 ft, tops 5,000 ft
A320 at 3,500 ft, 5 nm west, 3:13 pm PDT (22:13 UTC): a broken layer above 3,500 ft, remarks: during the descent RY25L. At the departure end, 5 nm west of the line.
as filed, and in English
```
LAX UA /OV LAX/TM 2213/FL035/TP A320/SK BKN-BASE035/RM DURD RY25L
```
Report
a routine report filed through LAX
Where
over LAX
Time
22:13 UTC
Height
at 3,500 ft
Aircraft
A320
Sky
BKN-BASE035
Remarks
during the descent RY25L
E75L , 4 nm west, 2:20 pm PDT (21:20 UTC): a broken layer from 3,700 ft to 4,700 ft. At the departure end, 4 nm west of the line.
as filed, and in English
```
KLAX UA /OV KLAX/TM 2120/FL2125/TP E75L/SK BKN037-TOP047
```
Report
a routine report filed through KLAX
Where
over KLAX
Time
21:20 UTC
Height
at 212,500 ft
Aircraft
E75L
Sky
a broken layer from 3,700 ft, tops 4,700 ft
E55P at 3,000 ft, 2 nm northeast, 3:00 pm PDT (22:00 UTC): a broken layer from 3,000 ft to 5,000 ft, remarks: during the descent RY21. At the departure end, 2 nm northeast of the line.
as filed, and in English
```
SMO UA /OV SMO030008/TM 2200/FL030/TP E55P/SK BKN030-TOP050/RM DURD RY21
```
Report
a routine report filed through SMO
Where
8 nm northeast (030°) of SMO
Time
22:00 UTC
Height
at 3,000 ft
Aircraft
E55P
Sky
a broken layer from 3,000 ft, tops 5,000 ft
Remarks
during the descent RY21
C172 at 5,000 ft, 40 nm west, 4:15 pm PDT (23:15 UTC): remarks: tops 5,000 ft on departure runway 25. At the departure end, 40 nm west of the line.
as filed, and in English
```
OXR UA /OV KOXR/TM 2315/FL050/TP C172/RM TOPS 050 ON DEP RWY25
```
Report
a routine report filed through OXR
Where
over KOXR
Time
23:15 UTC
Height
at 5,000 ft
Aircraft
C172
Remarks
tops 5,000 ft on departure runway 25

10 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 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 9 forecast points nearest it (WJF, FAT, BIH, RNO, LKV, RDM, PDX, 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	310° at 4 kt	+3 kt	2 °C	117 kt	7 h 09 min	12:21 am PDT (07:21 UTC)
6,500 ft	310° at 4 kt	+3 kt	2 °C	117 kt	7 h 09 min	12:21 am PDT (07:21 UTC)
8,500 ft	340° at 5 kt	+5 kt	-3 °C	115 kt	7 h 16 min	12:28 am PDT (07:28 UTC)
10,500 ft	290° at 4 kt	+2 kt	-5 °C	118 kt	7 h 05 min	12:17 am PDT (07:17 UTC)
12,500 ft	260° at 6 kt	+1 kt	-9 °C	119 kt	7 h 02 min	12:14 am PDT (07:14 UTC)
14,500 ft	280° at 6 kt	+3 kt	-12 °C	117 kt	7 h 09 min	12:21 am PDT (07:21 UTC)
16,500 ft	300° at 7 kt	+4 kt	-16 °C	116 kt	7 h 12 min	12:24 am PDT (07:24 UTC)
18,000 ft FL180	310° at 8 kt	+6 kt	-18 °C	114 kt	7 h 20 min	12:32 am PDT (07:32 UTC)
24,000 ft FL240	320° at 16 kt	+14 kt	-25 °C	106 kt	7 h 53 min	1:05 am PDT (08:05 UTC)
30,000 ft FL300	280° at 20 kt	+8 kt	-31 °C	112 kt	7 h 28 min	12:40 am PDT (07:40 UTC)
34,000 ft FL340	260° at 22 kt	0	-35 °C	120 kt	6 h 58 min	12:10 am PDT (07:10 UTC)
39,000 ft FL390	250° at 27 kt	−4 kt	-42 °C	124 kt	6 h 45 min	11:57 pm PDT (06:57 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
WJF	used from 0 nm out; 27 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°
FAT	used from 100 nm out; 65 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°
BIH	used from 199 nm out; 44 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 249 nm out; 68 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 398 nm out; 81 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 548 nm out; 61 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°
PDX	used from 697 nm out; 40 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°
YKM	used from 747 nm out; 57 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 797 nm out; 15 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
HHR Hawthorne, CA	departure	VFR Sky: a broken layer at 4,300 feet, a broken layer at 5,000 feet, a broken layer at 12,000 feet	from the west (270°) at 7 knots	10+ mi	4,300 ft	65 ft	4:53 pm PDT (23:53 UTC)
WHP Los Angeles, CA	20 nm out, 1 nm north of the line, tower	VFR Sky: a broken layer at 4,000 feet, overcast at 5,000 feet	from the southeast (130°) at 10 knots, gusting to 16	10+ mi	4,000 ft	1,003 ft	23:55 UTC
BFL Bakersfield, CA	100 nm out, 17 nm southwest of the line, tower	VFR	from the west-northwest (300°) at 11 knots	10+ mi	none	509 ft	23:54 UTC
MMH Mammoth Lakes, CA	219 nm out, 20 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
CXP Carson City, NV	319 nm out, 5 nm northwest of the line	VFR	from the west (260°) at 12 knots, gusting to 22	10+ mi	none	4,704 ft	23:55 UTC
RNO Reno, NV	339 nm out, 3 nm north of the line, tower	VFR Sky: scattered clouds at 9,500 feet	from the north-northeast (020°) at 11 knots, gusting to 14	10+ mi	none	4,414 ft	23:55 UTC
AAT Alturas, CA	468 nm out, 11 nm southwest of the line	VFR Sky: a few clouds at 8,000 feet	from the north (360°) at 7 knots	10+ mi	none	4,378 ft	23:55 UTC
LKV Lakeview, OR	508 nm out, 7 nm east of the line	VFR	from the north (010°) at 16 knots, gusting to 22	10+ mi	none	4,734 ft	23:53 UTC
RDM Redmond, OR	637 nm out, 4 nm southeast of the line, tower	VFR Sky: a few clouds at 4,000 feet, a broken layer at 4,900 feet	from the north-northwest (330°) at 12 knots	10+ mi	4,900 ft	3,081 ft	23:56 UTC
CZK Cascade Locks, OR	727 nm out, 10 nm southwest of the line	no report just now				151 ft
PLU Puyallup, WA	807 nm out, 7 nm northwest of the line	VFR Weather: light drizzle	calm	10+ mi	none	537 ft	23:35 UTC
BFI Seattle, WA	destination	VFR	variable at 6 knots	10+ mi	none	21 ft	4:53 pm PDT (23:53 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 BFI when you get there the forecast at the estimated arrival, 11:57 pm PDT (06:57 UTC)

Wind light and variable, visibility more than 6 miles, clear skies VFR

The whole forecast for BFI

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

4/3635 DISNEYLAND THEME PARK, ANAHEIM,, CA 19 nm from the route, at the departure end · security · ZLA
6/8783 38NM NE BAKERSFIELD, CA, Saturday, October 10, 2026 through Friday, October 23, 2026 UTC 16 nm from the route, 100 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 23 October · ZLA
6/7094 45NM NE MERCED, CA, Sunday, October 4, 2026 through Tuesday, October 20, 2026 UTC 9 nm from the route, 239 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 20 October · ZOA

Daylight

Sunset at HHR 6:23 pm PDT (01:23 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

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: Jack Northrop Fld/Hawthorne Municipal, Boeing Fld/King County International.