Boeing Fld/King County International to Mineta San Jose International BFI → SJC
611 nautical miles (703 statute miles) south on a straight line, true course 178°, about 163° magnetic at the departure end (variation 15E). At 120 knots that is 3 h 04 min at the quickest height in today's winds (24,000 ft, a 79-knot tailwind), arriving about 3:10 am PDT (10:10 UTC), after sunset at the destination. Right now BFI is VFR, wind from the south-southeast (160°) at 4 knots; SJC is VFR, wind from the south-southeast (150°) at 4 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: 29 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 whole 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 BFI.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B737 at 10,000 ft, 44 nm east, 9:25 pm PDT (04:25 UTC): no icing, remarks: during the descent runway 5. 197 nm along the route, 44 nm east of the line.
as filed, and in English
RDM UA /OV RDM/TM 0425/FL100/TP B737/TA UNKN/IC NEG/RM DURD RWY 5
- Report
- a routine report filed through RDM
- Where
- over RDM
- Time
- 04:25 UTC
- Height
- at 10,000 ft
- Aircraft
- B737
- Temperature
- UNKN
- Icing
- none
- Remarks
- during the descent runway 5
- E75L at 10,000 ft, 9 nm west, 10:40 pm PDT (05:40 UTC): light to moderate chop turbulence, remarks: during the descent rnav-z runway 32 100-60. 315 nm along the route, 9 nm west of the line.
as filed, and in English
MFR UA /OV ACLOB/TM 0540/FL100/TP E75L/TB LGT-MOD CHOP/RM DURD RNAV-Z RWY32 100-60
- Report
- a routine report filed through MFR
- Where
- aclob
- Time
- 05:40 UTC
- Height
- at 10,000 ft
- Aircraft
- E75L
- Turbulence
- light to moderate chop
- Remarks
- during the descent rnav-z runway 32 100-60
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 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 7 forecast points nearest it (SEA, PDX, RDM, SIY, RBL, SAC, 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 |
|---|---|---|---|---|---|---|
| 3,500 ft | 050° at 6 kt | −4 kt | 124 kt | 4 h 56 min | 5:02 am PDT (12:02 UTC) | |
| 5,500 ft | 040° at 10 kt | −7 kt | 0 °C | 127 kt | 4 h 49 min | 4:55 am PDT (11:55 UTC) |
| 7,500 ft | 030° at 12 kt | −10 kt | -1 °C | 130 kt | 4 h 42 min | 4:48 am PDT (11:48 UTC) |
| 9,500 ft | 020° at 15 kt | −14 kt | -5 °C | 134 kt | 4 h 34 min | 4:40 am PDT (11:40 UTC) |
| 11,500 ft | 010° at 20 kt | −20 kt | -8 °C | 140 kt | 4 h 22 min | 4:28 am PDT (11:28 UTC) |
| 13,500 ft | 010° at 30 kt | −30 kt | -10 °C | 150 kt | 4 h 04 min | 4:10 am PDT (11:10 UTC) |
| 15,500 ft | 360° at 42 kt | −42 kt | -13 °C | 162 kt | 3 h 46 min | 3:52 am PDT (10:52 UTC) |
| 17,500 ft | 360° at 54 kt | −54 kt | -15 °C | 174 kt | 3 h 31 min | 3:37 am PDT (10:37 UTC) |
| 18,000 ft FL180 | 360° at 57 kt | −57 kt | -16 °C | 177 kt | 3 h 27 min | 3:33 am PDT (10:33 UTC) |
| 24,000 ft FL240 | 360° at 80 kt | −79 kt | -24 °C | 199 kt | 3 h 04 min | 3:10 am PDT (10:10 UTC) |
| 30,000 ft FL300 | 360° at 69 kt | −69 kt | -36 °C | 189 kt | 3 h 14 min | 3:20 am PDT (10:20 UTC) |
| 34,000 ft FL340 | 350° at 37 kt | −36 kt | -40 °C | 156 kt | 3 h 55 min | 4:01 am PDT (11:01 UTC) |
| 39,000 ft FL390 | 290° at 18 kt | −6 kt | -42 °C | 126 kt | 4 h 51 min | 4:57 am PDT (11:57 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SEA | used from 0 nm out; 20 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° |
| PDX | used from 49 nm out; 45 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° |
| RDM | used from 148 nm out; 51 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° | |
| SIY | used from 246 nm out; 76 nm from the line | 050/17 1° | 010/16 -5° | 360/26 -8° | 360/71 -14° | 360/94 -23° | 360/88 -37° | 350/41 -40° | 290/17 -41° | |
| RBL | used from 394 nm out; 27 nm from the line | 020/16 | 360/6 5° | L/V -2° | 340/10 -8° | 360/59 -15° | 360/87 -23° | 360/68 -35° | 330/28 -37° | 260/26 -42° |
| SAC | used from 492 nm out; 33 nm from the line | 110/6 | L/V 4° | 010/11 -2° | 350/11 -7° | 340/24 -16° | 360/44 -23° | 330/24 -30° | 270/21 -35° | 230/23 -43° |
| SFO | used from 591 nm out; 22 nm from the line | 120/13 | 090/14 5° | 040/14 -1° | 350/17 -5° | 360/42 -14° | 360/64 -23° | 350/38 -32° | 300/19 -37° | 250/18 -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 south-southeast (160°) at 4 knots | 10+ mi | none | 21 ft | 11:53 pm PDT (06:53 UTC) |
| TIW Tacoma, WA | 20 nm out, 12 nm west of the line, tower | VFR | calm | 10+ mi | none | 294 ft | 06:53 UTC |
| TTD Portland, OR | 118 nm out, 8 nm west of the line, tower | VFR | from the east-southeast (110°) at 4 knots | 10+ mi | none | 38 ft | 06:53 UTC |
| UAO Aurora, OR | 138 nm out, 24 nm west of the line, tower | VFR | calm | 10+ mi | none | 199 ft | 06:53 UTC |
| LMT Klamath Falls, OR | 325 nm out, 16 nm east of the line, tower | VFR | from the north (010°) at 6 knots | 10+ mi | none | 4,095 ft | 06:53 UTC |
| RDD Redding, CA | 424 nm out, 12 nm west of the line, tower | VFR | from the north (360°) at 14 knots, gusting to 21 | 10+ mi | none | 505 ft | 06:53 UTC |
| CIC Chico, CA | 463 nm out, 7 nm east of the line, tower | VFR Sky: a few clouds at 12,000 feet | from the east-southeast (120°) at 3 knots | 10+ mi | none | 240 ft | 04:15 UTC |
| SMF Sacramento, CA | 532 nm out, 18 nm east of the line, tower | VFR Sky: a broken layer at 11,000 feet | from the southwest (220°) at 3 knots | 10+ mi | 11,000 ft | 26 ft | 06:53 UTC |
| CCR Concord, CA | 571 nm out, 5 nm west of the line, tower | VFR | from the southwest (220°) at 8 knots | 10+ mi | none | 25 ft | 06:53 UTC |
| SJC San Jose, CA | destination | VFR Sky: a few clouds at 3,000 feet, a few clouds at 8,000 feet | from the south-southeast (150°) at 4 knots | 10+ mi | none | 62 ft | 11:53 pm PDT (06:53 UTC) |
The highest airport on this list sits at 4,095 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At SJC when you get there the forecast at the estimated arrival, 3:10 am PDT (10:10 UTC)
Wind from the southeast at 4 knots, visibility more than 6 miles, clear skies VFR
The whole forecast for SJC
- 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
The forecast for BFI, the departure
- From Sun 11:00 pm PDT (06:00 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
- From Mon 7:00 pm PDT (02:00 UTC): wind calm, visibility more than 6 miles, clear skies
Temporary flight restrictions on the line or within 25 nm of it
- 6/3475 BEALE AFB, CA, Sunday, March 8, 2026 through Sunday, November 1, 2026 Local 16 nm from the route, 502 nm along the route · security · until 1 November · ZOA
- 6/7231 Santa Clara, CA, Sunday, October 11, 2026 through Monday, October 12, 2026 UTC 2 nm from the route, at the destination end · drones kept away from a public gathering · until 12 October · ZOA
Daylight
Sunset at BFI 6:25 pm PDT (01:25 UTC), at SJC 6:33 pm PDT (01:33 UTC) (civil twilight ends 6:59 pm PDT (01:59 UTC)). At 120 knots the arrival at SJC is before sunrise there (7:12 am PDT (14:12 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: Boeing Fld/King County International, Mineta San Jose International.