Boeing Fld/King County International to Kansas City International BFI → MCI
1,292 nautical miles (1,487 statute miles) east on a straight line, true course 102°, about 087° magnetic at the departure end (variation 15E). At 120 knots that is 8 h 58 min at the quickest height in today's winds (39,000 ft, a 24-knot tailwind), arriving about 2:57 pm CDT (19:57 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: 5 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 route from 30 to 338 nm out.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 179 to 487 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 189 to 696 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 318 to 1014 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 497 to 676 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 745 to 875 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Near the route, 795 nm along the route.
- 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 last 278 nm of 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
No pilot reports within 50 nautical miles of the line in the last three hours.
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 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 13 forecast points nearest it (SEA, YKM, GEG, LWS, DLN, BIL, LND, RAP, BFF, ONL, GRI, OMA, MKC). 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 | 260° at 17 kt | −13 kt | 18 °C | 133 kt | 9 h 43 min | 3:42 pm CDT (20:42 UTC) |
| 7,500 ft | 250° at 15 kt | −10 kt | 6 °C | 130 kt | 9 h 56 min | 3:55 pm CDT (20:55 UTC) |
| 9,500 ft | 250° at 15 kt | −9 kt | 3 °C | 129 kt | 10 h 01 min | 4:00 pm CDT (21:00 UTC) |
| 11,500 ft | 240° at 15 kt | −7 kt | 0 °C | 127 kt | 10 h 10 min | 4:09 pm CDT (21:09 UTC) |
| 13,500 ft | 230° at 15 kt | −6 kt | -4 °C | 126 kt | 10 h 15 min | 4:14 pm CDT (21:14 UTC) |
| 15,500 ft | 230° at 15 kt | −4 kt | -8 °C | 124 kt | 10 h 25 min | 4:24 pm CDT (21:24 UTC) |
| 17,500 ft | 220° at 14 kt | −3 kt | -13 °C | 123 kt | 10 h 30 min | 4:29 pm CDT (21:29 UTC) |
| 18,000 ft FL180 | 220° at 14 kt | −3 kt | -14 °C | 123 kt | 10 h 30 min | 4:29 pm CDT (21:29 UTC) |
| 24,000 ft FL240 | 220° at 26 kt | −6 kt | -25 °C | 126 kt | 10 h 15 min | 4:14 pm CDT (21:14 UTC) |
| 30,000 ft FL300 | 240° at 32 kt | −18 kt | -33 °C | 138 kt | 9 h 22 min | 3:21 pm CDT (20:21 UTC) |
| 34,000 ft FL340 | 240° at 38 kt | −21 kt | -37 °C | 141 kt | 9 h 10 min | 3:09 pm CDT (20:09 UTC) |
| 39,000 ft FL390 | 240° at 43 kt | −24 kt | -44 °C | 144 kt | 8 h 58 min | 2:57 pm CDT (19:57 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SEA | used from 0 nm out; 25 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° |
| YKM | used from 50 nm out; 41 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° |
| GEG | used from 149 nm out; 54 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° | |
| LWS | used from 199 nm out; 14 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° |
| DLN | used from 348 nm out; 57 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° | ||
| BIL | used from 497 nm out; 86 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° | |
| LND | used from 646 nm out; 106 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° | ||
| RAP | used from 696 nm out; 127 nm from the line | 250/28 16° | 260/31 10° | 240/25 4° | 210/35 -10° | 200/45 -23° | 230/47 -31° | 230/47 -36° | 230/51 -46° | |
| BFF | used from 845 nm out; 59 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° | |
| ONL | used from 944 nm out; 103 nm from the line | 250/31 22° | 230/27 16° | 220/25 8° | 230/25 -9° | 220/29 -22° | 250/42 -33° | 250/48 -36° | 250/52 -46° | |
| GRI | used from 1044 nm out; 31 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° | |
| OMA | used from 1193 nm out; 82 nm from the line | 230/47 | 240/33 21° | 230/22 13° | 220/27 5° | 240/35 -8° | 250/43 -21° | 260/47 -33° | 260/59 -36° | 270/58 -46° |
| MKC | used from 1242 nm out; 36 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° |
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 | ||||
| MWH Moses Lake, WA | 119 nm out, 10 nm northeast of the line, tower | no report just now | 1,188 ft | ||||
| LWS Lewiston, ID | 229 nm out, 14 nm southwest of the line, tower | no report just now | 1,442 ft | ||||
| HRF Hamilton, MT | 348 nm out, 16 nm north of the line | no report just now | 3,635 ft | ||||
| RVF Twin Bridges, MT | 427 nm out, 3 nm southeast of the line | no report just now | 4,788 ft | ||||
| GEY Greybull, WY | 616 nm out, 7 nm northeast of the line | no report just now | 3,941 ft | ||||
| BYG Buffalo, WY | 676 nm out, 21 nm northeast of the line | no report just now | 4,970 ft | ||||
| CDR Chadron, NE | 855 nm out, 4 nm northeast of the line | no report just now | 3,297 ft | ||||
| TIF Thedford, NE | 984 nm out, 8 nm north of the line | no report just now | 2,925 ft | ||||
| GRI Grand Island, NE | 1103 nm out, 5 nm northwest of the line, tower | no report just now | 1,847 ft | ||||
| STJ St Joseph, MO | 1272 nm out, 20 nm northeast of the line, tower | no report just now | 826 ft | ||||
| MCI Kansas City, MO | destination | no report just now | 1,027 ft |
The highest airport on this list sits at 4,970 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At MCI when you get there the forecast at the estimated arrival, 2:57 pm CDT (19:57 UTC)
MCI has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/8923 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local 23 nm from the route, 328 nm along the route · a VIP movement · starts Wednesday 14 October · ZLC
- 6/8925 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local 23 nm from the route, 328 nm along the route · a VIP movement · starts Wednesday 14 October · ZOB
Daylight
Sunset at BFI 6:25 pm PDT (01:25 UTC), at MCI 6:44 pm CDT (23:44 UTC) (civil twilight ends 7:11 pm CDT (00:11 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, Kansas City International.