Mineta San Jose International to Ellison Onizuka Kona International AT Keahole SJC → KOA
2,070 nautical miles (2,382 statute miles) west on a straight line, true course 249°, about 236° magnetic at the departure end (variation 13E). At 120 knots that is 13 h 06 min at the quickest height in today's winds (24,000 ft, a 38-knot tailwind), arriving about 2:07 pm HST (00:07 UTC). Right now SJC is VFR, wind calm; KOA is VFR, wind from the southeast (130°) 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: 309 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 119 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 SJC.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- A35K at 32,000 ft, 47 nm north, 1:39 am PDT (08:39 UTC): moderate chop turbulence, remarks: fdcs zoa. At the departure end, 47 nm north of the line.
as filed, and in English
OAK UA /OV OAK348024/TM 0839/FL320/TP A35K/TB MOD CHOP/RM FDCS ZOA
- Report
- a routine report filed through OAK
- Where
- 24 nm north (348°) of OAK
- Time
- 08:39 UTC
- Height
- at 32,000 ft
- Aircraft
- A35K
- Turbulence
- moderate chop
- Remarks
- fdcs zoa
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 1 forecast point nearest it (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 | 070° at 10 kt | −10 kt | 130 kt | 15 h 55 min | 4:56 pm HST (02:56 UTC) | |
| 6,500 ft | 040° at 12 kt | −12 kt | 3 °C | 132 kt | 15 h 41 min | 4:42 pm HST (02:42 UTC) |
| 8,500 ft | 010° at 16 kt | −11 kt | -1 °C | 131 kt | 15 h 48 min | 4:49 pm HST (02:49 UTC) |
| 10,500 ft | 360° at 25 kt | −11 kt | -2 °C | 131 kt | 15 h 48 min | 4:49 pm HST (02:49 UTC) |
| 12,500 ft | 350° at 37 kt | −14 kt | -4 °C | 134 kt | 15 h 27 min | 4:28 pm HST (02:28 UTC) |
| 14,500 ft | 360° at 49 kt | −22 kt | -6 °C | 142 kt | 14 h 35 min | 3:36 pm HST (01:36 UTC) |
| 16,500 ft | 360° at 61 kt | −30 kt | -9 °C | 150 kt | 13 h 48 min | 2:49 pm HST (00:49 UTC) |
| 18,000 ft FL180 | 360° at 70 kt | −36 kt | -11 °C | 156 kt | 13 h 16 min | 2:17 pm HST (00:17 UTC) |
| 24,000 ft FL240 | 360° at 75 kt | −38 kt | -22 °C | 158 kt | 13 h 06 min | 2:07 pm HST (00:07 UTC) |
| 30,000 ft FL300 | 350° at 57 kt | −20 kt | -38 °C | 140 kt | 14 h 47 min | 3:48 pm HST (01:48 UTC) |
| 34,000 ft FL340 | 330° at 37 kt | 0 | -42 °C | 120 kt | 17 h 15 min | 6:16 pm HST (04:16 UTC) |
| 39,000 ft FL390 | 280° at 25 kt | +19 kt | -44 °C | 101 kt | 20 h 30 min | 9:31 pm HST (07:31 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SFO | used from 0 nm out; 25 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 |
|---|---|---|---|---|---|---|---|
| SJC San Jose, CA | departure | VFR Sky: a few clouds at 8,000 feet, a few clouds at 10,000 feet | calm | 10+ mi | none | 62 ft | 3:53 am PDT (10:53 UTC) |
| HAF Half Moon Bay, CA | 20 nm out, 18 nm northwest of the line | marginal VFR Sky: a broken layer at 2,400 feet, overcast at 4,600 feet | calm | 7 mi | 2,400 ft | 66 ft | 10:55 UTC |
| MUE Kamuela, HI | 2040 nm out, 3 nm southwest of the line | no report just now | 2,671 ft | ||||
| KOA Kailua-Kona, HI | destination | VFR | from the southeast (130°) at 7 knots | 10+ mi | none | 50 ft | 12:53 am HST (10:53 UTC) |
The highest airport on this list sits at 2,671 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At KOA when you get there the forecast at the estimated arrival, 2:07 pm HST (00:07 UTC)
Wind from the west-southwest at 8 knots, visibility more than 6 miles, scattered clouds at 4,500 feet VFR
The whole forecast for KOA
- From Sun 11:00 pm HST (09:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 5,000 feet
- From Mon 10:00 am HST (20:00 UTC): wind from the west-southwest at 8 knots, visibility more than 6 miles, scattered clouds at 4,500 feet
- From Mon 7:00 pm HST (05:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 5,000 feet
The forecast for SJC, the departure
- From Sun 11:00 pm PDT (06:00 UTC): wind from the southeast at 4 knots, visibility more than 6 miles, clear skies
- From Mon 1:00 pm PDT (20:00 UTC): wind from the northwest at 8 knots, visibility more than 6 miles, clear skies
Temporary flight restrictions on the line or within 25 nm of it
No temporary flight restriction on or near this route right now.
Daylight
Sunset at SJC 6:33 pm PDT (01:33 UTC), at KOA 6:02 pm HST (04:02 UTC) (civil twilight ends 6:24 pm HST (04:24 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
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: Mineta San Jose International, Ellison Onizuka Kona International AT Keahole.