Plan a flight · Mon 5:07 am PDT (12:07 UTC)

March Arb Airport to San Francisco International RIV → SFO

335 nautical miles (386 statute miles) northwest on a straight line, true course 313°, about 299° magnetic at the departure end (variation 14E). At 120 knots that is 2 h 40 min at the quickest height in today's winds (4,500 ft, a 6-knot tailwind), arriving about 7:47 am PDT (14:47 UTC). Right now RIV is marginal VFR, wind from the east-southeast (110°) at 8 knots; SFO is VFR, wind from the west-northwest (300°) at 5 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: 1 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 below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the first 49 nm of the route.
AIRMET SIERRA 2E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 99 nm of the route.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 197 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 RIV.

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

A333 descending, 4 nm southwest, 4:05 am PDT (11:05 UTC): overcast from 1,500 ft to 7,000 ft, remarks: during the descent runway 26R. 20 nm along the route, 4 nm southwest of the line.
as filed, and in English
```
ONT UA /OV ONT080/TM 1105/FLUNKN/TP A333/SK OVC015 - TOP070/RM DURD RY26R
```
Report
a routine report filed through ONT
Where
ONT080
Time
11:05 UTC
Height
height not given
Aircraft
A333
Sky
overcast from 1,500 ft, tops 7,000 ft
Remarks
during the descent runway 26R
B744 at 1,700 ft, 37 nm southwest, 2:24 am PDT (09:24 UTC): a few clouds above 1,700 ft, remarks: during the descent runway 25L lax. 39 nm along the route, 37 nm southwest of the line.
as filed, and in English
```
LAX UA /OV KLAX/TM 0924/FL017/TP B744/SK FEW017/RM DURD RY25L LAX
```
Report
a routine report filed through LAX
Where
over KLAX
Time
09:24 UTC
Height
at 1,700 ft
Aircraft
B744
Sky
a few clouds from 1,700 ft
Remarks
during the descent runway 25L lax

Winds aloft along the route, and the time en route the forecast for use 08:00–15:00 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 4 forecast points nearest it (ONT, WJF, FAT, SFO). 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	190° at 11 kt	−6 kt	4 °C	126 kt	2 h 40 min	7:47 am PDT (14:47 UTC)
6,500 ft	190° at 12 kt	−6 kt	3 °C	126 kt	2 h 40 min	7:47 am PDT (14:47 UTC)
8,500 ft	200° at 11 kt	−5 kt	0 °C	125 kt	2 h 41 min	7:48 am PDT (14:48 UTC)
10,500 ft	230° at 9 kt	+1 kt	-2 °C	119 kt	2 h 49 min	7:56 am PDT (14:56 UTC)
12,500 ft	260° at 11 kt	+7 kt	-5 °C	113 kt	2 h 58 min	8:05 am PDT (15:05 UTC)
14,500 ft	280° at 13 kt	+11 kt	-8 °C	109 kt	3 h 04 min	8:11 am PDT (15:11 UTC)
16,500 ft	290° at 16 kt	+15 kt	-11 °C	105 kt	3 h 11 min	8:18 am PDT (15:18 UTC)
18,000 ft FL180	300° at 18 kt	+17 kt	-13 °C	103 kt	3 h 15 min	8:22 am PDT (15:22 UTC)
24,000 ft FL240	300° at 21 kt	+19 kt	-22 °C	101 kt	3 h 19 min	8:26 am PDT (15:26 UTC)
30,000 ft FL300	260° at 27 kt	+15 kt	-32 °C	105 kt	3 h 11 min	8:18 am PDT (15:18 UTC)
34,000 ft FL340	240° at 36 kt	+10 kt	-38 °C	110 kt	3 h 03 min	8:10 am PDT (15:10 UTC)
39,000 ft FL390	230° at 41 kt	+6 kt	-45 °C	114 kt	2 h 56 min	8:03 am PDT (15:03 UTC)

Based on data from the 12th at 06:00 UTC; valid on the 12th at 12:00 UTC for use 08:00 to 15:00 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; 7 nm from the line	250/11	200/20 4°	210/27 3°	220/26 -4°	240/32 -13°	220/52 -21°	220/67 -30°	220/72 -37°	220/65 -46°
WJF	used from 49 nm out; 6 nm from the line		210/26 4°	210/28 2°	230/23 -4°	240/28 -13°	220/47 -23°	220/57 -30°	220/65 -37°	220/59 -45°
FAT	used from 148 nm out; 57 nm from the line	140/11	180/15 3°	150/14 -3°	200/14 -6°	240/17 -16°	320/25 -23°	270/22 -31°	240/29 -37°	230/36 -44°
SFO	used from 247 nm out; 64 nm from the line	090/9	050/12 4°	010/17 -2°	350/34 -3°	360/70 -11°	360/75 -22°	350/57 -38°	330/37 -42°	280/25 -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
RIV Riverside, CA	departure	marginal VFR Sky: scattered clouds at 800 feet, a broken layer at 1,600 feet, a broken layer at 2,700 feet, a broken layer at 4,800 feet	from the east-southeast (110°) at 8 knots	9 mi	1,600 ft	1,536 ft	4:34 am PDT (11:34 UTC)
ONT Ontario, CA	20 nm out, 4 nm southwest of the line, tower	marginal VFR Sky: a few clouds at 1,400 feet, a broken layer at 2,300 feet, overcast at 3,300 feet Weather: light rain	from the southwest (220°) at 4 knots	7 mi	2,300 ft	944 ft	11:53 UTC
PMD Palmdale, CA	59 nm out, 5 nm northeast of the line, tower	VFR Sky: a broken layer at 3,400 feet, overcast at 4,000 feet	from the west-southwest (250°) at 13 knots	10+ mi	3,400 ft	2,542 ft	11:53 UTC
TSP Tehachapi, CA	99 nm out, 16 nm northeast of the line	marginal VFR Sky: a few clouds at 800 feet, overcast at 1,700 feet Weather: mist, unknown precipitation	from the west (270°) at 8 knots	5 mi	1,700 ft	4,001 ft	11:55 UTC
BFL Bakersfield, CA	128 nm out, 8 nm northeast of the line, tower	VFR Sky: overcast at 5,500 feet	from the north-northeast (020°) at 6 knots	10+ mi	5,500 ft	509 ft	11:54 UTC
KIC King City, CA	237 nm out, 24 nm southwest of the line	no report just now				374 ft
SNS Salinas, CA	266 nm out, 20 nm southwest of the line, tower	VFR	calm	10+ mi	none	84 ft	11:53 UTC
SJC San Jose, CA	306 nm out, 4 nm north of the line, tower	VFR	from the south (180°) at 5 knots	10+ mi	none	62 ft	11:53 UTC
SFO San Francisco, CA	destination	VFR Sky: a few clouds at 2,000 feet, a few clouds at 9,000 feet	from the west-northwest (300°) at 5 knots	10+ mi	none	13 ft	4:56 am PDT (11:56 UTC)

The highest airport on this list sits at 4,001 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At SFO when you get there the forecast at the estimated arrival, 7:47 am PDT (14:47 UTC)

Wind from the west at 4 knots, visibility more than 6 miles, a few clouds at 2,000 feet, a few clouds at 9,000 feet VFR

The whole forecast for SFO

From Mon 5:00 am PDT (12:00 UTC): wind from the west at 4 knots, visibility more than 6 miles, a few clouds at 2,000 feet, a few clouds at 9,000 feet
From Mon 3:00 pm PDT (22:00 UTC): wind from the west at 12 knots, visibility more than 6 miles, clear skies
From Mon 8:00 pm PDT (03:00 UTC): wind from the west at 6 knots, visibility more than 6 miles, clear skies

The forecast for RIV, the departure

From Mon 5:00 am PDT (12:00 UTC): wind from the south-southeast at 10 knots, gusting to 15, light rain, scattered clouds at 700 feet, a broken layer at 2,500 feet and more above
Changing between Mon 6:00 am PDT (13:00 UTC) and 7:00 am PDT (14:00 UTC) to: wind from the south-southeast at 9 knots, light rain, mist, scattered clouds at 700 feet, a broken layer at 2,500 feet and more above
At times between Mon 11:00 am PDT (18:00 UTC) and 3:00 pm PDT (22:00 UTC): wind from the south at 10 knots, gusting to 18, showers nearby, a broken layer at 3,000 feet, overcast at 6,000 feet
Changing between Mon 3:00 pm PDT (22:00 UTC) and 4:00 pm PDT (23:00 UTC) to: wind from the northwest at 6 knots, light rain showers, a broken layer at 3,000 feet, a broken layer at 5,000 feet
At times between Mon 5:00 pm PDT (00:00 UTC) and 11:00 pm PDT (06:00 UTC): wind light and variable, light rain showers, a broken layer at 2,000 feet, overcast at 5,000 feet
Changing between Tue 12:00 am PDT (07:00 UTC) and 1:00 am PDT (08:00 UTC) to: wind from the south-southeast at 4 knots, scattered clouds at 2,500 feet, a broken layer at 5,000 feet
Changing between Tue 10:00 am PDT (17:00 UTC) and 11:00 am PDT (18:00 UTC) to: wind from the north-northwest at 4 knots, a few clouds at 3,000 feet, scattered clouds at 5,000 feet

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

4/3635 DISNEYLAND THEME PARK, ANAHEIM,, CA 23 nm from the route, 20 nm along the route · security · ZLA

Daylight

Sunset at RIV 6:17 pm PDT (01:17 UTC), at SFO 6:35 pm PDT (01:35 UTC) (civil twilight ends 7:01 pm PDT (02:01 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, 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: March Arb Airport, San Francisco International.