Boeing Fld/King County International to San Diego International BFI → SAN
918 nautical miles (1,057 statute miles) south on a straight line, true course 163°, about 148° magnetic at the departure end (variation 15E). At 120 knots that is 6 h 48 min at the quickest height in today's winds (24,000 ft, a 15-knot tailwind), arriving about 3:22 am PDT (10:22 UTC), after sunset at the destination. 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, 599 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 above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 479 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 20,000 ft. Over the route from 150 to 289 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Near the route, 509 nm along the route.
- AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the route from 569 to 888 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 BFI.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
Not fetched just now.
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 10 forecast points nearest it (SEA, YKM, PDX, RDM, LKV, RNO, BIH, WJF, ONT, SAN). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 5,500 ft | 140° at 2 kt | +2 kt | 2 °C | 118 kt | 7 h 47 min | 4:21 am PDT (11:21 UTC) |
| 7,500 ft | 340° at 1 kt | −1 kt | -2 °C | 121 kt | 7 h 35 min | 4:09 am PDT (11:09 UTC) |
| 9,500 ft | 300° at 3 kt | −2 kt | -3 °C | 122 kt | 7 h 31 min | 4:05 am PDT (11:05 UTC) |
| 11,500 ft | 250° at 4 kt | +1 kt | -7 °C | 119 kt | 7 h 43 min | 4:17 am PDT (11:17 UTC) |
| 13,500 ft | 260° at 4 kt | 0 | -10 °C | 120 kt | 7 h 39 min | 4:13 am PDT (11:13 UTC) |
| 15,500 ft | 280° at 6 kt | −2 kt | -13 °C | 122 kt | 7 h 31 min | 4:05 am PDT (11:05 UTC) |
| 17,500 ft | 290° at 7 kt | −3 kt | -16 °C | 123 kt | 7 h 28 min | 4:02 am PDT (11:02 UTC) |
| 18,000 ft FL180 | 290° at 7 kt | −4 kt | -17 °C | 124 kt | 7 h 24 min | 3:58 am PDT (10:58 UTC) |
| 24,000 ft FL240 | 320° at 17 kt | −15 kt | -24 °C | 135 kt | 6 h 48 min | 3:22 am PDT (10:22 UTC) |
| 30,000 ft FL300 | 300° at 19 kt | −12 kt | -32 °C | 132 kt | 6 h 57 min | 3:31 am PDT (10:31 UTC) |
| 34,000 ft FL340 | 260° at 21 kt | −2 kt | -37 °C | 122 kt | 7 h 31 min | 4:05 am PDT (11:05 UTC) |
| 39,000 ft FL390 | 240° at 30 kt | +10 kt | -42 °C | 110 kt | 8 h 21 min | 4:55 am PDT (11:55 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; 21 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° |
| YKM | used from 50 nm out; 53 nm from the line | 070/10 | 040/15 -1° | 020/27 -8° | 030/25 -13° | 020/48 -20° | 010/83 -27° | 010/77 -37° | 010/49 -40° | 350/14 -41° |
| PDX | used from 100 nm out; 48 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 150 nm out; 29 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° | |
| LKV | used from 250 nm out; 59 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° | ||
| RNO | used from 399 nm out; 74 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° | |
| BIH | used from 549 nm out; 61 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° | |
| WJF | used from 699 nm out; 69 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° | |
| ONT | used from 799 nm out; 13 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° |
| SAN | used from 898 nm out; 10 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° |
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 | no report just now | 21 ft | ||||
| PLU Puyallup, WA | 20 nm out, 8 nm southwest of the line | no report just now | 537 ft | ||||
| DLS The Dalles, OR | 120 nm out, 14 nm east of the line | no report just now | 246 ft | ||||
| RDM Redmond, OR | 200 nm out, 9 nm southwest of the line, tower | no report just now | 3,081 ft | ||||
| LKV Lakeview, OR | 329 nm out, 10 nm southwest of the line | no report just now | 4,734 ft | ||||
| RNO Reno, NV | 489 nm out, 24 nm southwest of the line, tower | no report just now | 4,414 ft | ||||
| BIH Bishop, CA | 639 nm out, 10 nm northeast of the line | no report just now | 4,124 ft | ||||
| MHV Mojave, CA | 769 nm out, 14 nm southwest of the line, tower | no report just now | 2,801 ft | ||||
| ONT Ontario, CA | 838 nm out, 3 nm northwest of the line, tower | no report just now | 944 ft | ||||
| SAN San Diego, CA | destination | no report just now | 16 ft |
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 SAN when you get there the forecast at the estimated arrival, 3:22 am PDT (10:22 UTC)
SAN has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/8783 38NM NE BAKERSFIELD, CA, Saturday, October 10, 2026 through Friday, October 23, 2026 UTC 11 nm from the route, 729 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 23 October · ZLA
- 4/3635 DISNEYLAND THEME PARK, ANAHEIM,, CA 18 nm from the route, 848 nm along the route · security · ZLA
Daylight
Sunset at BFI 6:27 pm PDT (01:27 UTC), at SAN 6:19 pm PDT (01:19 UTC) (civil twilight ends 6:44 pm PDT (01:44 UTC)). At 120 knots the arrival at SAN is before sunrise there (6:50 am PDT (13:50 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, San Diego International.