Topeka Regional to Boeing Fld/King County International FOE → BFI
1,266 nautical miles (1,457 statute miles) northwest on a straight line, true course 303°, about 298° magnetic at the departure end (variation 5E). At 120 knots that is 10 h 44 min at the quickest height in today's winds (18,000 ft, a 2-knot headwind), arriving about 2:42 pm PDT (21:42 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
- 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 first 249 nm of the route.
- 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 309 to 977 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 349 to 538 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 458 to 518 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 578 to 1076 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 598 to 787 nm out.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 807 to 1086 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 937 to 1236 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 FOE.
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 11 forecast points nearest it (MKC, SLN, GRI, BFF, LND, BIL, DLN, LWS, GEG, 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 | 260° at 19 kt | +13 kt | 18 °C | 107 kt | 11 h 50 min | 3:48 pm PDT (22:48 UTC) |
| 6,500 ft | 260° at 18 kt | +13 kt | 9 °C | 107 kt | 11 h 50 min | 3:48 pm PDT (22:48 UTC) |
| 8,500 ft | 250° at 15 kt | +9 kt | 3 °C | 111 kt | 11 h 24 min | 3:22 pm PDT (22:22 UTC) |
| 10,500 ft | 240° at 16 kt | +8 kt | 2 °C | 112 kt | 11 h 18 min | 3:16 pm PDT (22:16 UTC) |
| 12,500 ft | 230° at 17 kt | +7 kt | -1 °C | 113 kt | 11 h 12 min | 3:10 pm PDT (22:10 UTC) |
| 14,500 ft | 230° at 17 kt | +5 kt | -6 °C | 115 kt | 11 h 01 min | 2:59 pm PDT (21:59 UTC) |
| 16,500 ft | 220° at 18 kt | +4 kt | -10 °C | 116 kt | 10 h 55 min | 2:53 pm PDT (21:53 UTC) |
| 18,000 ft FL180 | 220° at 18 kt | +2 kt | -14 °C | 118 kt | 10 h 44 min | 2:42 pm PDT (21:42 UTC) |
| 24,000 ft FL240 | 220° at 32 kt | +8 kt | -25 °C | 112 kt | 11 h 18 min | 3:16 pm PDT (22:16 UTC) |
| 30,000 ft FL300 | 240° at 38 kt | +19 kt | -33 °C | 101 kt | 12 h 32 min | 4:30 pm PDT (23:30 UTC) |
| 34,000 ft FL340 | 240° at 42 kt | +21 kt | -37 °C | 99 kt | 12 h 47 min | 4:45 pm PDT (23:45 UTC) |
| 39,000 ft FL390 | 240° at 44 kt | +24 kt | -44 °C | 96 kt | 13 h 11 min | 5:09 pm PDT (00:09 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| MKC | used from 0 nm out; 71 nm from the line | 240/49 | 240/21 20° | 220/19 13° | 230/21 6° | 260/26 -7° | 250/37 -19° | 270/66 -31° | 270/65 -38° | 280/60 -48° |
| SLN | used from 50 nm out; 57 nm from the line | 230/49 | 240/41 22° | 230/26 15° | 220/21 7° | 240/38 -8° | 240/44 -21° | 260/77 -29° | 270/70 -36° | 270/63 -48° |
| GRI | used from 100 nm out; 58 nm from the line | 230/39 23° | 230/32 15° | 210/29 7° | 230/31 -8° | 230/43 -21° | 250/52 -31° | 260/59 -35° | 260/59 -46° | |
| BFF | used from 299 nm out; 83 nm from the line | 280/28 | 260/39 11° | 240/34 5° | 210/38 -11° | 210/52 -22° | 230/61 -31° | 230/61 -36° | 240/56 -45° | |
| LND | used from 548 nm out; 97 nm from the line | 240/10 3° | 240/30 0° | 220/42 -13° | 230/52 -23° | 220/54 -33° | 220/52 -36° | 220/53 -44° | ||
| BIL | used from 698 nm out; 93 nm from the line | 300/14 | 270/19 -2° | 260/26 -2° | 220/28 -13° | 210/51 -25° | 220/56 -33° | 220/61 -39° | 220/72 -45° | |
| DLN | used from 747 nm out; 68 nm from the line | 190/10 -4° | 220/23 -4° | 210/21 -18° | 210/43 -28° | 210/60 -33° | 210/72 -37° | 210/67 -44° | ||
| LWS | used from 947 nm out; 67 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° |
| GEG | used from 1096 nm out; 71 nm from the line | 060/7 -2° | 070/12 -6° | 050/8 -8° | 120/11 -21° | 110/18 -33° | 030/22 -37° | 040/6 -38° | 240/7 -41° | |
| YKM | used from 1146 nm out; 39 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 1196 nm out; 44 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 |
|---|---|---|---|---|---|---|---|
| FOE Topeka, KS | departure | no report just now | 1,077 ft | ||||
| MHK Manhattan, KS | 50 nm out, 16 nm south of the line, tower | no report just now | 1,066 ft | ||||
| LXN Lexington, NE | 219 nm out, 4 nm southwest of the line | no report just now | 2,412 ft | ||||
| AIA Alliance, NE | 379 nm out, 6 nm south of the line | no report just now | 3,930 ft | ||||
| LSK Lusk, WY | 458 nm out, 1 nm east of the line | no report just now | 4,966 ft | ||||
| WRL Worland, WY | 628 nm out, 2 nm southwest of the line | no report just now | 4,251 ft | ||||
| COD Cody, WY | 688 nm out, 11 nm northeast of the line | no report just now | 5,102 ft | ||||
| DLN Dillon, MT | 837 nm out, 7 nm southwest of the line | no report just now | 5,244 ft | ||||
| GIC Grangeville, ID | 997 nm out, 19 nm south of the line | no report just now | 3,313 ft | ||||
| LWS Lewiston, ID | 1036 nm out, 7 nm southwest of the line, tower | no report just now | 1,442 ft | ||||
| MWH Moses Lake, WA | 1146 nm out, 14 nm northeast of the line, tower | no report just now | 1,188 ft | ||||
| BFI Seattle, WA | destination | no report just now | 21 ft |
The highest airport on this list sits at 5,244 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, 2:42 pm PDT (21:42 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 FOE 6:48 pm CDT (23:48 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: Topeka Regional, Boeing Fld/King County International.