Westchester County to Boeing Fld/King County International HPN → BFI
2,089 nautical miles (2,404 statute miles) northwest on a straight line, true course 297°, about 310° magnetic at the departure end (variation 13W). At 120 knots that is 16 h 59 min at the quickest height in today's winds (4,500 ft, a 3-knot tailwind), arriving about 6:07 pm PDT (01:07 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: 2 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 SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist, fog). Over the first 480 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the first 100 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 60 to 200 nm out.
- AIRMET TANGO 3W: 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 510 to 720 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 949 to 1729 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 1319 to 1919 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1689 to 1839 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 1699 to 2059 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 HPN.
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 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 17 forecast points nearest it (JFK, AVP, SYR, BUF, TVC, GRB, DLH, AXN, GFK, MOT, DIK, GGW, GTF, GPI, 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 | 100° at 2 kt | −3 kt | 0 °C | 123 kt | 16 h 59 min | 6:07 pm PDT (01:07 UTC) |
| 6,500 ft | light and variable | 0 | 7 °C | 120 kt | 17 h 24 min | 6:32 pm PDT (01:32 UTC) |
| 8,500 ft | 240° at 4 kt | +3 kt | 5 °C | 117 kt | 17 h 51 min | 6:59 pm PDT (01:59 UTC) |
| 10,500 ft | 240° at 8 kt | +5 kt | 1 °C | 115 kt | 18 h 10 min | 7:18 pm PDT (02:18 UTC) |
| 12,500 ft | 240° at 12 kt | +9 kt | -2 °C | 111 kt | 18 h 49 min | 7:57 pm PDT (02:57 UTC) |
| 14,500 ft | 250° at 15 kt | +13 kt | -6 °C | 107 kt | 19 h 31 min | 8:39 pm PDT (03:39 UTC) |
| 16,500 ft | 250° at 19 kt | +17 kt | -10 °C | 103 kt | 20 h 17 min | 9:25 pm PDT (04:25 UTC) |
| 18,000 ft FL180 | 250° at 22 kt | +20 kt | -12 °C | 100 kt | 20 h 53 min | 10:01 pm PDT (05:01 UTC) |
| 24,000 ft FL240 | 250° at 26 kt | +23 kt | -23 °C | 97 kt | 21 h 32 min | 10:40 pm PDT (05:40 UTC) |
| 30,000 ft FL300 | 260° at 31 kt | +28 kt | -37 °C | 92 kt | 22 h 42 min | 11:50 pm PDT (06:50 UTC) |
| 34,000 ft FL340 | 260° at 36 kt | +34 kt | -43 °C | 86 kt | 24 h 17 min | 1:25 am PDT (08:25 UTC) |
| 39,000 ft FL390 | 260° at 52 kt | +49 kt | -49 °C | 71 kt | 29 h 25 min | 6:33 am PDT (13:33 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| JFK | used from 0 nm out; 42 nm from the line | 250/18 | 250/23 14° | 240/33 9° | 240/33 4° | 240/38 -10° | 240/45 -21° | 230/86 -32° | 230/102 -40° | 230/84 -51° |
| AVP | used from 50 nm out; 30 nm from the line | 150/5 | 350/13 12° | 270/20 8° | 260/17 4° | 260/25 -11° | 240/31 -22° | 240/54 -35° | 230/61 -41° | 240/55 -49° |
| SYR | used from 150 nm out; 67 nm from the line | 280/13 | 350/18 10° | 340/10 6° | 300/15 1° | 280/17 -12° | 270/16 -23° | 280/25 -38° | 250/40 -42° | 240/53 -50° |
| BUF | used from 200 nm out; 26 nm from the line | 320/10 | 010/16 10° | 360/10 6° | 340/13 2° | 330/22 -11° | 300/25 -23° | 320/31 -38° | 300/29 -44° | 280/36 -50° |
| TVC | used from 400 nm out; 142 nm from the line | 260/31 | 280/22 15° | 290/18 10° | 270/13 2° | 290/25 -10° | 300/35 -21° | 310/52 -37° | 320/59 -47° | 300/84 -54° |
| GRB | used from 650 nm out; 55 nm from the line | 250/36 | 270/23 16° | 270/14 9° | 240/18 4° | 280/26 -9° | 280/29 -20° | 290/42 -36° | 290/51 -45° | 290/72 -55° |
| DLH | used from 750 nm out; 99 nm from the line | 080/28 | 240/21 15° | 250/26 9° | 250/32 3° | 260/42 -11° | 270/40 -21° | 260/43 -36° | 260/46 -46° | 260/65 -54° |
| AXN | used from 949 nm out; 54 nm from the line | 100/14 | 250/21 14° | 240/24 12° | 240/31 5° | 260/36 -10° | 260/40 -21° | 250/42 -36° | 260/48 -45° | 260/53 -50° |
| GFK | used from 1049 nm out; 55 nm from the line | 070/18 | 100/10 9° | 250/11 6° | 250/27 1° | 250/34 -10° | 260/43 -21° | 260/39 -36° | 260/36 -46° | 260/59 -53° |
| MOT | used from 1149 nm out; 84 nm from the line | 120/14 5° | 200/20 4° | 230/33 1° | 250/39 -11° | 250/50 -21° | 240/61 -37° | 250/56 -45° | 260/68 -51° | |
| DIK | used from 1249 nm out; 53 nm from the line | 150/24 7° | 200/38 6° | 220/53 0° | 230/51 -9° | 230/49 -21° | 240/37 -37° | 240/47 -44° | 250/65 -48° | |
| GGW | used from 1349 nm out; 85 nm from the line | 110/23 0° | 130/20 -2° | 170/24 -3° | 230/44 -11° | 220/51 -21° | 210/52 -39° | 220/64 -44° | 240/85 -48° | |
| GTF | used from 1549 nm out; 79 nm from the line | 070/11 | 080/15 -7° | 110/19 -9° | 190/25 -14° | 200/34 -23° | 200/54 -39° | 220/66 -40° | 220/77 -44° | |
| GPI | used from 1699 nm out; 44 nm from the line | 070/19 -5° | 100/16 -7° | 080/10 -8° | 130/8 -19° | 170/37 -28° | 200/50 -40° | 210/43 -40° | 220/41 -42° | |
| GEG | used from 1849 nm out; 26 nm from the line | 080/16 -2° | 050/17 -7° | 080/9 -10° | 190/33 -21° | 180/31 -32° | L/V -35° | L/V -37° | 270/8 -40° | |
| YKM | used from 1999 nm out; 66 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° |
| SEA | used from 2049 nm out; 22 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° |
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 |
|---|---|---|---|---|---|---|---|
| HPN White Plains, NY | departure | no report just now | 439 ft | ||||
| ELM Elmira/Corning, NY | 160 nm out, 5 nm south of the line, tower | no report just now | 955 ft | ||||
| BUF Buffalo, NY | 250 nm out, 4 nm north of the line, tower | no report just now | 726 ft | ||||
| GOV Grayling, MI | 530 nm out, 4 nm north of the line, tower | no report just now | 1,158 ft | ||||
| PKF Park Falls, WI | 780 nm out, 4 nm northwest of the line | no report just now | 1,501 ft | ||||
| AIT Aitkin, MN | 919 nm out, 4 nm northwest of the line | no report just now | 1,206 ft | ||||
| FAR Fargo, ND | 1049 nm out, 5 nm southwest of the line, tower | no report just now | 901 ft | ||||
| SDY Sidney, MT | 1359 nm out, 2 nm southeast of the line | no report just now | 1,985 ft | ||||
| GPI Kalispell, MT | 1759 nm out, 21 nm north of the line, tower | no report just now | 2,976 ft | ||||
| SFF Spokane, WA | 1889 nm out, 11 nm south of the line, tower | no report just now | 1,956 ft | ||||
| BFI Seattle, WA | destination | no report just now | 21 ft |
The highest airport on this list sits at 2,976 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, 6:07 pm PDT (01:07 UTC)
BFI has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 5/2811 NEW YORK, NY, Monday, October 20, 2025 through Tuesday, October 20, 2026 Local 21 nm from the route, at the departure end · security · until 20 October · ZNY
Daylight
Sunset at HPN 6:19 pm EDT (22:19 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: Westchester County, Boeing Fld/King County International.