Boeing Fld/King County International to Fresno Yosemite International BFI → FAT
656 nautical miles (755 statute miles) south on a straight line, true course 169°, about 154° magnetic at the departure end (variation 15E). At 120 knots that is 4 h 04 min at the quickest height in today's winds (24,000 ft, a 41-knot tailwind), arriving about 3:07 am PDT (10:07 UTC), after sunset at the destination. Right now BFI is VFR, wind calm; FAT is VFR, wind from the southeast (130°) at 13 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 above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 556 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Near the route, 238 nm along 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 BFI.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B737 at 10,000 ft, 12 nm east, 9:25 pm PDT (04:25 UTC): no icing, remarks: during the descent runway 5. 199 nm along the route, 12 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
- B738 at 30,000 ft, 2 nm northeast, 8:45 pm PDT (03:45 UTC): light to moderate turbulence, remarks: zse. 348 nm along the route, 2 nm northeast of the line.
as filed, and in English
LKV UA /OV LKV180040/TM 0345/FL300/TP B738/TB CONS LGT OCNL MOD/RM ZSE
- Report
- a routine report filed through LKV
- Where
- 40 nm south (180°) of LKV
- Time
- 03:45 UTC
- Height
- at 30,000 ft
- Aircraft
- B738
- Turbulence
- continuous light occasional moderate
- Remarks
- zse
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, LKV, RNO, SAC, FAT). 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 | 050° at 7 kt | −4 kt | -1 °C | 124 kt | 5 h 17 min | 4:20 am PDT (11:20 UTC) |
| 7,500 ft | 020° at 8 kt | −6 kt | -3 °C | 126 kt | 5 h 12 min | 4:15 am PDT (11:15 UTC) |
| 9,500 ft | 010° at 8 kt | −8 kt | -6 °C | 128 kt | 5 h 08 min | 4:11 am PDT (11:11 UTC) |
| 11,500 ft | 360° at 8 kt | −8 kt | -8 °C | 128 kt | 5 h 08 min | 4:11 am PDT (11:11 UTC) |
| 13,500 ft | 350° at 11 kt | −11 kt | -12 °C | 131 kt | 5 h | 4:03 am PDT (11:03 UTC) |
| 15,500 ft | 350° at 16 kt | −16 kt | -14 °C | 136 kt | 4 h 49 min | 3:52 am PDT (10:52 UTC) |
| 17,500 ft | 350° at 21 kt | −21 kt | -17 °C | 141 kt | 4 h 39 min | 3:42 am PDT (10:42 UTC) |
| 18,000 ft FL180 | 350° at 22 kt | −22 kt | -18 °C | 142 kt | 4 h 37 min | 3:40 am PDT (10:40 UTC) |
| 24,000 ft FL240 | 350° at 41 kt | −41 kt | -25 °C | 161 kt | 4 h 04 min | 3:07 am PDT (10:07 UTC) |
| 30,000 ft FL300 | 340° at 34 kt | −34 kt | -33 °C | 154 kt | 4 h 16 min | 3:19 am PDT (10:19 UTC) |
| 34,000 ft FL340 | 310° at 22 kt | −18 kt | -37 °C | 138 kt | 4 h 45 min | 3:48 am PDT (10:48 UTC) |
| 39,000 ft FL390 | 260° at 22 kt | 0 | -41 °C | 120 kt | 5 h 28 min | 4:31 am PDT (11:31 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 50 nm out; 51 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 149 nm out; 30 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 248 nm out; 62 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 397 nm out; 76 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° | |
| SAC | used from 546 nm out; 73 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° |
| FAT | used from 596 nm out; 35 nm from the line | 130/16 | 160/20 5° | 190/28 -1° | 210/25 -5° | 220/27 -15° | 230/21 -26° | 220/42 -29° | 220/44 -35° | 220/44 -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 | calm | 10+ mi | none | 21 ft | 10:53 pm PDT (05:53 UTC) |
| PLU Puyallup, WA | 30 nm out, 6 nm northwest of the line | VFR Weather: light drizzle | calm | 10+ mi | none | 537 ft | 05:55 UTC |
| CZK Cascade Locks, OR | 109 nm out, 5 nm southwest of the line | no report just now | 151 ft | ||||
| RDM Redmond, OR | 199 nm out, 12 nm east of the line, tower | VFR Sky: a few clouds at 8,000 feet | calm | 10+ mi | none | 3,081 ft | 05:56 UTC |
| AAT Alturas, CA | 368 nm out, 8 nm east of the line | VFR | from the northeast (040°) at 10 knots, gusting to 15 | 10+ mi | none | 4,378 ft | 05:55 UTC |
| SVE Susanville, CA | 437 nm out, 4 nm west of the line | VFR Sky: a broken layer at 8,000 feet | from the north-northwest (330°) at 5 knots | 10+ mi | 8,000 ft | 4,149 ft | 05:55 UTC |
| TRK Truckee, CA | 507 nm out, 7 nm northeast of the line, tower | VFR | from the southwest (220°) at 10 knots, gusting to 14 | 10+ mi | none | 5,904 ft | 05:55 UTC |
| TVL South Lake Tahoe, CA | 527 nm out, 8 nm east of the line | VFR | calm | 10+ mi | none | 6,268 ft | 05:53 UTC |
| MPI Mariposa, CA | 606 nm out, 9 nm southwest of the line | no report just now | 2,254 ft | ||||
| FAT Fresno, CA | destination | VFR Sky: a broken layer at 10,000 feet, a broken layer at 15,000 feet, a broken layer at 20,000 feet | from the southeast (130°) at 13 knots | 10+ mi | 10,000 ft | 335 ft | 10:53 pm PDT (05:53 UTC) |
The highest airport on this list sits at 6,268 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At FAT when you get there the forecast at the estimated arrival, 3:07 am PDT (10:07 UTC)
Wind light and variable, visibility more than 6 miles, scattered clouds at 25,000 feet VFR
The whole forecast for FAT
- From Sun 11:00 pm PDT (06:00 UTC): wind from the southeast at 10 knots, visibility more than 6 miles, a few clouds at 3,000 feet, scattered clouds at 20,000 feet
- From Mon 2:00 am PDT (09:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 25,000 feet
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
- 6/7094 45NM NE MERCED, CA, Sunday, October 4, 2026 through Tuesday, October 20, 2026 UTC 6 nm from the route, 616 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 20 October · ZOA
Daylight
Sunset at BFI 6:27 pm PDT (01:27 UTC), at FAT 6:26 pm PDT (01:26 UTC) (civil twilight ends 6:52 pm PDT (01:52 UTC)). At 120 knots the arrival at FAT is before sunrise there (7:03 am PDT (14:03 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, Fresno Yosemite International.