Plan a flight · Sun 8:39 pm PDT (03:39 UTC)

San Diego International to Boeing Fld/King County International SAN → BFI

918 nautical miles (1,057 statute miles) north on a straight line, true course 347°, about 336° magnetic at the departure end (variation 11E). At 120 knots that is 7 h 10 min at the quickest height in today's winds (39,000 ft, a 8-knot tailwind), arriving about 3:49 am PDT (10:49 UTC), after sunset at the destination. Right now SAN is VFR, wind from the west-southwest (240°) at 7 knots; BFI is VFR, wind calm. 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: 6 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 W12W: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the southwest at 20 knots, until 9:55 pm PDT (04:55 UTC). Near the route, 319 nm along the route.
as issued
```
WSUS33 KKCI 120255
MKCW WST 120255
CONVECTIVE SIGMET 12W
VALID UNTIL 0455Z
NV
FROM 40SSE TWF-10W ELY-30SE OAL-30W OAL-70WSW TWF-40SSE TWF
AREA TS MOV FROM 24020KT. TOPS TO FL310.
```
AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the route from 30 to 349 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Near the route, 409 nm along the route.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 479 nm of the route.
AIRMET ZULU 2C: moderate icing up to 20,000 ft. Over the route from 629 to 769 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 SAN.

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

B737 at 13,000 ft, 37 nm west, 8:30 pm PDT (03:30 UTC): moderate turbulence. 50 nm along the route, 37 nm west of the line.
as filed, and in English
```
SLI UA /OV SLI180020/TM 0330/FL130/TP B737/TB MOD
```
Report
a routine report filed through SLI
Where
20 nm south (180°) of SLI
Time
03:30 UTC
Height
at 13,000 ft
Aircraft
B737
Turbulence
moderate
B737 at 3,100 ft, 0 nm northwest, 8:05 pm PDT (03:05 UTC): remarks: during the descent bases 3,100 ft. At the departure end, 0 nm northwest of the line.
as filed, and in English
```
SAN UA /OV SAN/TM 0305/FL031/TP B737/RM DURD BASES 031
```
Report
a routine report filed through SAN
Where
over SAN
Time
03:05 UTC
Height
at 3,100 ft
Aircraft
B737
Remarks
during the descent bases 3,100 ft
B739 at 5,700 ft, 3 nm northwest, 7:07 pm PDT (02:07 UTC): overcast from 2,800 ft to 5,700 ft. At the departure end, 3 nm northwest of the line.
as filed, and in English
```
SAN UA /OV MZB/TM 0207/FL057/TP B739/SK OVC028-TOPS057
```
Report
a routine report filed through SAN
Where
over MZB
Time
02:07 UTC
Height
at 5,700 ft
Aircraft
B739
Sky
overcast from 2,800 ft, tops 5,700 ft
B739 at 2,700 ft, 0 nm northwest, 7:01 pm PDT (02:01 UTC): a broken layer above 2,700 ft, remarks: during the descent runway 27. At the departure end, 0 nm northwest of the line.
as filed, and in English
```
SAN UA /OV SAN/TM 0201/FL027/TP B739/SK BKN027/RM DURD RY27
```
Report
a routine report filed through SAN
Where
over SAN
Time
02:01 UTC
Height
at 2,700 ft
Aircraft
B739
Sky
a broken layer from 2,700 ft
Remarks
during the descent runway 27
C172 climbing, 12 nm northeast, 6:20 pm PDT (01:20 UTC): overcast from 3,000 ft to 6,200 ft. At the departure end, 12 nm northeast of the line.
as filed, and in English
```
SEE UA /OV 090003/TM 0120/FLDURC/TP C172/SK OVC030-TOP062
```
Report
a routine report filed through SEE
Where
wind from 090° at 3 knots
Time
01:20 UTC
Height
during the climb
Aircraft
C172
Sky
overcast from 3,000 ft, tops 6,200 ft
E75L at 2,800 ft, 0 nm northwest, 6:05 pm PDT (01:05 UTC): a broken layer from 2,800 ft to 5,500 ft. At the departure end, 0 nm northwest of the line.
as filed, and in English
```
SAN UA /OV SAN/TM 0105/FL28/TP E75L/SK BKN028/TOP055
```
Report
a routine report filed through SAN
Where
over SAN
Time
01:05 UTC
Height
at 2,800 ft
Aircraft
E75L
Sky
a broken layer from 2,800 ft; TOP055
C525 at 2,900 ft, 4 nm north, 7:46 pm PDT (02:46 UTC): remarks: B029. At the departure end, 4 nm north of the line.
as filed, and in English
```
CRQ UA /OV CRQ/TM 0246/FL029/TP C525/RM B029
```
Report
a routine report filed through CRQ
Where
over CRQ
Time
02:46 UTC
Height
at 2,900 ft
Aircraft
C525
Remarks
B029
SR22 at 2,700 ft, 15 nm east, 7:02 pm PDT (02:02 UTC): overcast above 2,700 ft. At the departure end, 15 nm east of the line.
as filed, and in English
```
RNM UA /OV RNM270003/TM 0202/FL027/TP SR22/SK BASES OVC027
```
Report
a routine report filed through RNM
Where
3 nm west (270°) of RNM
Time
02:02 UTC
Height
at 2,700 ft
Aircraft
SR22
Sky
bases OVC027
E170 at 3,500 ft, 4 nm north, 6:59 pm PDT (01:59 UTC): remarks: B035. At the departure end, 4 nm north of the line.
as filed, and in English
```
CRQ UA /OV CRQ/TM 0159/FL035/TP E170/RM B035
```
Report
a routine report filed through CRQ
Where
over CRQ
Time
01:59 UTC
Height
at 3,500 ft
Aircraft
E170
Remarks
B035
A20N at 5,300 ft, 20 nm west, 6:00 pm PDT (01:00 UTC): a broken layer from 4,300 ft to 5,300 ft. 60 nm along the route, 20 nm west of the line.
as filed, and in English
```
SNA UA /OV SNA/TM 0100/FL053/TP A20N/SK BKN043-TOP053
```
Report
a routine report filed through SNA
Where
over SNA
Time
01:00 UTC
Height
at 5,300 ft
Aircraft
A20N
Sky
a broken layer from 4,300 ft, tops 5,300 ft
B737 at 3,500 ft, 32 nm west, 8:25 pm PDT (03:25 UTC): a broken layer above 3,500 ft. 70 nm along the route, 32 nm west of the line.
as filed, and in English
```
LGB UA /OV LGB/TM 0325/FL035/TP B737/SK BKN035
```
Report
a routine report filed through LGB
Where
over LGB
Time
03:25 UTC
Height
at 3,500 ft
Aircraft
B737
Sky
a broken layer from 3,500 ft
B737 at 6,400 ft, 32 nm west, 6:30 pm PDT (01:30 UTC): a broken layer from 3,300 ft to 6,400 ft. 70 nm along the route, 32 nm west of the line.
as filed, and in English
```
LGB UA /OV LGB/TM 0130/FL064/TP B737/SK BKN033-TOP064
```
Report
a routine report filed through LGB
Where
over LGB
Time
01:30 UTC
Height
at 6,400 ft
Aircraft
B737
Sky
a broken layer from 3,300 ft, tops 6,400 ft
A20N climbing, 5 nm south, 8:04 pm PDT (03:04 UTC): a routine report with nothing remarked on. 80 nm along the route, 5 nm south of the line.
as filed, and in English
```
ONT UA /OV ONT153007/TM 0304/FLDURC/TP A20N/SK B-036 -T047
```
Report
a routine report filed through ONT
Where
7 nm southeast (153°) of ONT
Time
03:04 UTC
Height
during the climb
Aircraft
A20N
Sky
B-036 T047
A20N climbing, 4 nm west, 8:03 pm PDT (03:03 UTC): a routine report with nothing remarked on. 80 nm along the route, 4 nm west of the line.
as filed, and in English
```
ONT UA /OV ONT204003/TM 0303/FLDURC/TP A20N/SK B-030
```
Report
a routine report filed through ONT
Where
3 nm southwest (204°) of ONT
Time
03:03 UTC
Height
during the climb
Aircraft
A20N
Sky
B-030

12 more routine reports are on the map.

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 9 forecast points nearest it (SAN, 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	140° at 1 kt	−1 kt	2 °C	121 kt	7 h 35 min	4:14 am PDT (11:14 UTC)
6,500 ft	light and variable	−1 kt	2 °C	121 kt	7 h 35 min	4:14 am PDT (11:14 UTC)
8,500 ft	320° at 2 kt	+2 kt	-3 °C	118 kt	7 h 47 min	4:26 am PDT (11:26 UTC)
10,500 ft	280° at 2 kt	+1 kt	-5 °C	119 kt	7 h 43 min	4:22 am PDT (11:22 UTC)
12,500 ft	270° at 3 kt	0	-8 °C	120 kt	7 h 39 min	4:18 am PDT (11:18 UTC)
14,500 ft	290° at 5 kt	+3 kt	-11 °C	117 kt	7 h 51 min	4:30 am PDT (11:30 UTC)
16,500 ft	300° at 7 kt	+5 kt	-14 °C	115 kt	7 h 59 min	4:38 am PDT (11:38 UTC)
18,000 ft FL180	310° at 9 kt	+7 kt	-17 °C	113 kt	8 h 07 min	4:46 am PDT (11:46 UTC)
24,000 ft FL240	320° at 19 kt	+17 kt	-24 °C	103 kt	8 h 55 min	5:34 am PDT (12:34 UTC)
30,000 ft FL300	300° at 21 kt	+15 kt	-32 °C	105 kt	8 h 45 min	5:24 am PDT (12:24 UTC)
34,000 ft FL340	270° at 21 kt	+5 kt	-37 °C	115 kt	7 h 59 min	4:38 am PDT (11:38 UTC)
39,000 ft FL390	240° at 30 kt	−8 kt	-42 °C	128 kt	7 h 10 min	3:49 am PDT (10:49 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
SAN	used from 0 nm out; 25 nm from the line	200/11	200/23 7°	210/27 4°	210/31 -3°	220/56 -10°	220/56 -19°	220/52 -30°	220/64 -37°	220/67 -44°
ONT	used from 50 nm out; 7 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 100 nm out; 22 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 200 nm out; 60 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 349 nm out; 55 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 499 nm out; 63 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 649 nm out; 43 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 749 nm out; 58 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 848 nm out; 40 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
SAN San Diego, CA	departure	VFR Sky: a broken layer at 3,300 feet, overcast at 4,100 feet	from the west-southwest (240°) at 7 knots	10+ mi	3,300 ft	16 ft	7:51 pm PDT (02:51 UTC)
ONT Ontario, CA	80 nm out, 3 nm northwest of the line, tower	VFR Sky: scattered clouds at 3,200 feet, a broken layer at 4,500 feet, a broken layer at 5,500 feet	from the west-southwest (240°) at 6 knots	10+ mi	4,500 ft	944 ft	02:53 UTC
MHV Mojave, CA	150 nm out, 14 nm southwest of the line, tower	VFR	from the south-southwest (210°) at 16 knots	10+ mi	none	2,801 ft	02:35 UTC
BIH Bishop, CA	279 nm out, 10 nm northeast of the line	VFR	from the southwest (230°) at 8 knots	10+ mi	none	4,124 ft	02:56 UTC
RNO Reno, NV	429 nm out, 24 nm southwest of the line, tower	VFR Sky: a few clouds at 9,000 feet	from the west-northwest (290°) at 5 knots	10+ mi	none	4,414 ft	02:55 UTC
LKV Lakeview, OR	589 nm out, 10 nm southwest of the line	VFR	from the north (350°) at 14 knots, gusting to 19	10+ mi	none	4,734 ft	02:53 UTC
RDM Redmond, OR	719 nm out, 9 nm southwest of the line, tower	VFR Sky: overcast at 4,900 feet	from the northwest (310°) at 5 knots	10+ mi	4,900 ft	3,081 ft	02:56 UTC
DLS The Dalles, OR	799 nm out, 14 nm east of the line	VFR Sky: overcast at 11,000 feet	from the southwest (230°) at 3 knots	10+ mi	11,000 ft	246 ft	02:53 UTC
PLU Puyallup, WA	898 nm out, 8 nm southwest of the line	VFR Weather: light drizzle	calm	10+ mi	none	537 ft	03:35 UTC
BFI Seattle, WA	destination	VFR	calm	10+ mi	none	21 ft	7:53 pm PDT (02:53 UTC)

The highest airport on this list sits at 4,734 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, 3:49 am PDT (10:49 UTC)

Wind calm, visibility more than 6 miles, patches of fog, clear skies VFR

The whole forecast for BFI

From Sun 8:00 pm PDT (03:00 UTC): wind calm, visibility more than 6 miles, clear skies
From Mon 3:00 am PDT (10:00 UTC): wind calm, 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

The forecast for SAN, the departure

From Sun 8:00 pm PDT (03:00 UTC): wind from the southwest at 6 knots, visibility more than 6 miles, showers nearby, scattered clouds at 2,500 feet, a broken layer at 3,500 feet
From Mon 12:00 pm PDT (19:00 UTC): wind from the west-southwest at 10 knots, gusting to 17, visibility more than 6 miles, a few clouds at 2,500 feet, a broken layer at 5,000 feet
From Mon 5:00 pm PDT (00:00 UTC): wind from the west-southwest at 8 knots, visibility more than 6 miles, a broken layer at 5,000 feet

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

4/3635 DISNEYLAND THEME PARK, ANAHEIM,, CA 18 nm from the route, 70 nm along the route · security · ZLA
6/8783 38NM NE BAKERSFIELD, CA, Saturday, October 10, 2026 through Friday, October 23, 2026 UTC 11 nm from the route, 190 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 23 October · ZLA

Daylight

Sunset at SAN 6:19 pm PDT (01:19 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: San Diego International, Boeing Fld/King County International.