Austin-Bergstrom International to Boeing Fld/King County International AUS → BFI
1,540 nautical miles (1,772 statute miles) northwest on a straight line, true course 319°, about 315° magnetic at the departure end (variation 4E). At 120 knots that is 12 h 37 min at the quickest height in today's winds (4,500 ft, a 2-knot tailwind), arriving about 5:57 pm PDT (00:57 UTC). 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
- SIGMET W23W: thunderstorms (a convective SIGMET) up to 27,000 ft, moving from the southwest at 20 knots, until 8:55 am CDT (13:55 UTC). Over the route from 1000 to 1050 nm out.
as issued
WSUS33 KKCI 121155 MKCW WST 121155 CONVECTIVE SIGMET 23W VALID UNTIL 1355Z UT ID FROM 20WSW PIH-20NE MLD-30SW SLC-20NW BVL-20WSW PIH AREA TS MOV FROM 24020KT. TOPS TO FL270.
- AIRMET TANGO 2W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Over the route from 210 to 250 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Over the route from 480 to 900 nm out.
- AIRMET TANGO 1W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Over the route from 530 to 590 nm out.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 ft. Over the route from 530 to 750 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 680 to 1370 nm out.
- AIRMET TANGO 1W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Over the route from 720 to 790 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 730 to 1190 nm out.
- AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the route from 770 to 940 nm out.
- AIRMET SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the route from 1030 to 1220 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 1220 to 1510 nm out.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 1240 to 1340 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 AUS.
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 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 14 forecast points nearest it (SAT, ABI, LBB, AMA, TCC, ALS, GJT, RKS, SLC, PIH, BOI, LWS, YKM, SEA). 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 | 220° at 10 kt | −2 kt | 13 °C | 122 kt | 12 h 37 min | 5:57 pm PDT (00:57 UTC) |
| 6,500 ft | 220° at 10 kt | −1 kt | 7 °C | 121 kt | 12 h 44 min | 6:04 pm PDT (01:04 UTC) |
| 8,500 ft | 220° at 10 kt | −1 kt | 4 °C | 121 kt | 12 h 44 min | 6:04 pm PDT (01:04 UTC) |
| 10,500 ft | 230° at 15 kt | 0 | 2 °C | 120 kt | 12 h 50 min | 6:10 pm PDT (01:10 UTC) |
| 12,500 ft | 230° at 17 kt | 0 | -2 °C | 120 kt | 12 h 50 min | 6:10 pm PDT (01:10 UTC) |
| 14,500 ft | 220° at 21 kt | −1 kt | -5 °C | 121 kt | 12 h 44 min | 6:04 pm PDT (01:04 UTC) |
| 16,500 ft | 220° at 24 kt | −2 kt | -10 °C | 122 kt | 12 h 37 min | 5:57 pm PDT (00:57 UTC) |
| 18,000 ft FL180 | 220° at 26 kt | −2 kt | -12 °C | 122 kt | 12 h 37 min | 5:57 pm PDT (00:57 UTC) |
| 24,000 ft FL240 | 230° at 34 kt | +5 kt | -22 °C | 115 kt | 13 h 23 min | 6:43 pm PDT (01:43 UTC) |
| 30,000 ft FL300 | 240° at 43 kt | +9 kt | -31 °C | 111 kt | 13 h 52 min | 7:12 pm PDT (02:12 UTC) |
| 34,000 ft FL340 | 240° at 44 kt | +14 kt | -37 °C | 106 kt | 14 h 32 min | 7:52 pm PDT (02:52 UTC) |
| 39,000 ft FL390 | 240° at 40 kt | +13 kt | -45 °C | 107 kt | 14 h 24 min | 7:44 pm PDT (02:44 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SAT | used from 0 nm out; 64 nm from the line | 160/18 | 180/22 17° | 190/16 14° | 210/16 9° | 220/16 -5° | 200/11 -14° | 250/8 -29° | 330/8 -40° | 020/26 -51° |
| ABI | used from 50 nm out; 94 nm from the line | 200/30 19° | 220/12 16° | 220/11 9° | 230/15 -5° | 250/26 -15° | 250/39 -28° | 270/36 -38° | 280/30 -51° | |
| LBB | used from 250 nm out; 29 nm from the line | 220/25 21° | 230/20 15° | 220/20 7° | 230/36 -6° | 240/50 -15° | 240/59 -28° | 260/52 -37° | 260/45 -50° | |
| AMA | used from 350 nm out; 50 nm from the line | 230/32 | 230/28 14° | 230/27 7° | 230/38 -6° | 230/50 -17° | 250/69 -28° | 260/62 -37° | 270/65 -49° | |
| TCC | used from 400 nm out; 21 nm from the line | 240/20 | 230/22 13° | 230/27 6° | 230/40 -7° | 240/55 -18° | 240/74 -27° | 240/68 -37° | 250/64 -49° | |
| ALS | used from 500 nm out; 71 nm from the line | 240/35 3° | 230/54 -9° | 240/66 -19° | 230/85 -26° | 240/87 -34° | 240/70 -47° | |||
| GJT | used from 700 nm out; 37 nm from the line | 220/26 6° | 230/39 0° | 220/55 -13° | 230/60 -23° | 230/78 -31° | 230/80 -35° | 230/74 -44° | ||
| RKS | used from 850 nm out; 73 nm from the line | 250/9 | 230/21 -1° | 210/43 -14° | 220/59 -23° | 220/55 -32° | 220/53 -35° | 220/48 -44° | ||
| SLC | used from 900 nm out; 54 nm from the line | 200/16 | 210/23 4° | 220/34 -3° | 210/40 -16° | 220/66 -23° | 220/64 -31° | 220/57 -36° | 220/50 -43° | |
| PIH | used from 1000 nm out; 34 nm from the line | 070/8 | 150/19 1° | 180/32 -4° | 210/44 -17° | 210/37 -28° | 210/74 -31° | 220/68 -35° | 220/60 -43° | |
| BOI | used from 1100 nm out; 81 nm from the line | 320/11 1° | 280/8 -5° | 220/14 -11° | 200/60 -19° | 190/66 -31° | 210/46 -32° | 220/50 -33° | 220/43 -39° | |
| LWS | used from 1250 nm out; 85 nm from the line | L/V | 340/5 -3° | L/V -6° | 040/7 -10° | 100/23 -22° | 180/30 -31° | 190/11 -34° | 200/11 -36° | 220/23 -40° |
| YKM | used from 1350 nm out; 73 nm from the line | 360/6 | 360/11 -1° | 030/20 -7° | 040/21 -11° | 020/55 -18° | 010/84 -26° | 010/79 -40° | 010/45 -42° | 350/23 -42° |
| SEA | used from 1500 nm out; 18 nm from the line | 350/5 | 010/6 0° | 010/9 -4° | 010/27 -6° | 010/51 -15° | 360/58 -26° | 360/60 -41° | 350/55 -48° | 340/30 -45° |
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 |
|---|---|---|---|---|---|---|---|
| AUS Austin, TX | departure | no report just now | 541 ft | ||||
| GTU Georgetown, TX | 20 nm out, 19 nm northeast of the line, tower | no report just now | 789 ft | ||||
| ABI Abilene, TX | 170 nm out, 10 nm northeast of the line, tower | no report just now | 1,790 ft | ||||
| PVW Plainview, TX | 310 nm out, 7 nm north of the line | no report just now | 3,374 ft | ||||
| ALS Alamosa, CO | 600 nm out, 6 nm south of the line | no report just now | 7,539 ft | ||||
| GJT Grand Junction, CO | 760 nm out, 19 nm southwest of the line, tower | no report just now | 4,861 ft | ||||
| VEL Vernal, UT | 840 nm out, 9 nm north of the line | no report just now | 5,274 ft | ||||
| EVW Evanston, WY | 930 nm out, 2 nm south of the line | no report just now | 7,142 ft | ||||
| SUN Hailey, ID | 1130 nm out, 8 nm east of the line, tower | no report just now | 5,319 ft | ||||
| PDT Pendleton, OR | 1360 nm out, 9 nm southwest of the line, tower | no report just now | 1,494 ft | ||||
| YKM Yakima, WA | 1450 nm out, 7 nm south of the line, tower | no report just now | 1,098 ft | ||||
| BFI Seattle, WA | destination | no report just now | 21 ft |
The highest airport on this list sits at 7,539 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BFI when you get there the forecast at the estimated arrival, 5:57 pm PDT (00:57 UTC)
BFI has no terminal forecast; use the nearest airport that does.
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 AUS 7:02 pm CDT (00:02 UTC), at BFI 6:25 pm PDT (01:25 UTC) (civil twilight ends 6:56 pm PDT (01:56 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: Austin-Bergstrom International, Boeing Fld/King County International.