Plan a flight · Mon 10:48 am EDT (14:48 UTC)

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 18 h 10 min at the quickest height in today's winds (4,500 ft, a 5-knot headwind), arriving about 1:58 am PDT (08:58 UTC), after sunset at the destination. Right now HPN is marginal VFR, wind from the north-northwest (330°) at 10 knots; BFI is VFR, wind from the southeast (130°) at 3 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: 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

SIGMET C20C: thunderstorms (a convective SIGMET) up to 37,000 ft, moving from the southwest at 40 knots, until 11:55 am EDT (15:55 UTC). Over the route from 1109 to 1169 nm out.
as issued
```
WSUS32 KKCI 121355
MKCC WST 121355
CONVECTIVE SIGMET 20C
VALID UNTIL 1555Z
SD ND
FROM 80W GFK-40WNW FAR-40W ABR-50ENE DPR-30S BIS-80W GFK
AREA TS MOV FROM 21040KT. TOPS TO FL370.
```
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 24,000 ft to 40,000 ft. Over the first 20 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, mist). Over the route from 70 to 200 nm out.
AIRMET SIERRA 1E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, mist). Over the route from 100 to 270 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 799 to 1729 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 1099 to 1369 nm out.
AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 1379 to 1889 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1579 to 1789 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 1689 to 2029 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

E75L at 34,000 ft, 34 nm northeast, 10:32 am EDT (14:32 UTC): moderate clear-air turbulence above 34,000 ft. At the departure end, 34 nm northeast of the line.
as filed, and in English
```
BGM UA /OV DNY/TM 1432/FL340/TP E75L/TB OCNL MOD CAT 340
```
Report
a routine report filed through BGM
Where
over DNY
Time
14:32 UTC
Height
at 34,000 ft
Aircraft
E75L
Turbulence
occasional moderate clear-air turbulence at 34,000 ft
PC12 at 5,400 ft, 27 nm east, 10:31 am EDT (14:31 UTC): no turbulence, vmc, remarks: smooth ride. At the departure end, 27 nm east of the line.
as filed, and in English
```
BDR UA /OV KBDR/TM 1431/FL054/TP PC12/SK VMC/TB NEG/RM SMOOTH RIDE
```
Report
a routine report filed through BDR
Where
over KBDR
Time
14:31 UTC
Height
at 5,400 ft
Aircraft
PC12
Sky
visual conditions
Turbulence
none
Remarks
smooth ride
BCS3 , 32 nm southeast, 10:14 am EDT (14:14 UTC): remarks: bases 1,500 ft + 5 knots ils runway 6. At the departure end, 32 nm southeast of the line.
as filed, and in English
```
ISP UA /OV KISP/TM 1414/FL-1-/TP BCS3/RM BASES 015 +/- 5KTS ILS RWY 6
```
Report
a routine report filed through ISP
Where
over KISP
Time
14:14 UTC
Height
at -1-
Aircraft
BCS3
Remarks
bases 1,500 ft + 5 knots ils runway 6
A220 at 4,000 ft, 26 nm south, 10:10 am EDT (14:10 UTC): a broken layer from 2,000 ft to 3,400 ft, remarks: during the climb 4L. At the departure end, 26 nm south of the line.
as filed, and in English
```
JFK UA /OV JFK100008/TM 1410/FL040/TP A220/SK BKN020-TOP034/RM DURC 4L
```
Report
a routine report filed through JFK
Where
8 nm east (100°) of JFK
Time
14:10 UTC
Height
at 4,000 ft
Aircraft
A220
Sky
a broken layer from 2,000 ft, tops 3,400 ft
Remarks
during the climb 4L
M700 at 1,800 ft, 23 nm northeast, 10:02 am EDT (14:02 UTC): a broken layer above 1,900 ft. At the departure end, 23 nm northeast of the line.
as filed, and in English
```
DXR UA /OV KDXR080003/TM 1402/FL018/TP M700/SK BKN019
```
Report
a routine report filed through DXR
Where
3 nm east (080°) of KDXR
Time
14:02 UTC
Height
at 1,800 ft
Aircraft
M700
Sky
a broken layer from 1,900 ft
P212 at 7,000 ft, 45 nm northeast, 10:01 am EDT (14:01 UTC): no turbulence, vmc, 9 °C. At the departure end, 45 nm northeast of the line.
as filed, and in English
```
BDL UA /OV BDL240025/TM 1401/FL070/TP P212/WX VMC/TA 9/TB NEG
```
Report
a routine report filed through BDL
Where
25 nm southwest (240°) of BDL
Time
14:01 UTC
Height
at 7,000 ft
Aircraft
P212
Weather
visual conditions
Temperature
9 °C
Turbulence
none
M700 at 4,000 ft, 27 nm east, 9:54 am EDT (13:54 UTC): no turbulence, vmc. At the departure end, 27 nm east of the line.
as filed, and in English
```
BDR UA /OV BDR/TM 1354/FL040/TP M700/SK VMC/TB SMOOTH
```
Report
a routine report filed through BDR
Where
over BDR
Time
13:54 UTC
Height
at 4,000 ft
Aircraft
M700
Sky
visual conditions
Turbulence
smooth
SR22 at 2,200 ft, 21 nm northeast, 9:17 am EDT (13:17 UTC): remarks: breaking out of clouds at at 2,200 ft rnav-z 8 approach. At the departure end, 21 nm northeast of the line.
as filed, and in English
```
DXR UA /OV KDXR/TM 1317/FL022/TP SR22/RM BREAKING OUT OF CLOUDS AT 022 RNAV-Z 8 APPROACH
```
Report
a routine report filed through DXR
Where
over KDXR
Time
13:17 UTC
Height
at 2,200 ft
Aircraft
SR22
Remarks
breaking out of clouds at at 2,200 ft rnav-z 8 approach
E175 descending, 19 nm southwest, 9:04 am EDT (13:04 UTC): remarks: base 1200 feet. At the departure end, 19 nm southwest of the line.
as filed, and in English
```
LGA UA /OV FINAL RWY 04/TM 1304/FLDURD/TP E175/RM BASE 1200 FEET
```
Report
a routine report filed through LGA
Where
final runway 04
Time
13:04 UTC
Height
during the descent
Aircraft
E175
Remarks
base 1200 feet
B738 descending, 32 nm southeast, 9:02 am EDT (13:02 UTC): remarks: bases 900 ft. At the departure end, 32 nm southeast of the line.
as filed, and in English
```
ISP UA /OV ISP/TM 1302/FLDURD/TP B738/RM BASES 009
```
Report
a routine report filed through ISP
Where
over ISP
Time
13:02 UTC
Height
during the descent
Aircraft
B738
Remarks
bases 900 ft
A320 climbing, 26 nm south, 9:00 am EDT (13:00 UTC): a routine report with nothing remarked on. At the departure end, 26 nm south of the line.
as filed, and in English
```
JFK UA /OV JFK100005/TM 1300/FLDURC/TP A320/SK 008-021
```
Report
a routine report filed through JFK
Where
5 nm east (100°) of JFK
Time
13:00 UTC
Height
during the climb
Aircraft
A320
Sky
from 800 ft to 2,100 ft
C680 descending, 0 nm northwest, 9:00 am EDT (13:00 UTC): remarks: bases at at 1,000 ft. At the departure end, 0 nm northwest of the line.
as filed, and in English
```
HPN UA /OV KHPN/TM 1300/FLDURD/TP C680/RM BASES AT 010
```
Report
a routine report filed through HPN
Where
over KHPN
Time
13:00 UTC
Height
during the descent
Aircraft
C680
Remarks
bases at at 1,000 ft
A320 at 900 ft, 29 nm south, 8:57 am EDT (12:57 UTC): overcast above 900 ft. At the departure end, 29 nm south of the line.
as filed, and in English
```
JFK UA /OV KJFK225003/TM 1257/FL009/TP A320/SK OVC009
```
Report
a routine report filed through JFK
Where
3 nm southwest (225°) of KJFK
Time
12:57 UTC
Height
at 900 ft
Aircraft
A320
Sky
overcast from 900 ft
BCS3 at 36,000 ft, 14 nm northeast, 8:50 am EDT (12:50 UTC): light turbulence. At the departure end, 14 nm northeast of the line.
as filed, and in English
```
DXR UA /OV CMK/TM 1250/FL360/TP BCS3/TB INTMT LGT
```
Report
a routine report filed through DXR
Where
over CMK
Time
12:50 UTC
Height
at 36,000 ft
Aircraft
BCS3
Turbulence
intermittent light

16 more routine reports are on the map.

Winds aloft along the route, and the time en route the forecast for use 14:00–21:00 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	290° at 5 kt	+5 kt	-1 °C	115 kt	18 h 10 min	1:58 am PDT (08:58 UTC)
6,500 ft	280° at 9 kt	+9 kt	7 °C	111 kt	18 h 49 min	2:37 am PDT (09:37 UTC)
8,500 ft	270° at 11 kt	+11 kt	5 °C	109 kt	19 h 10 min	2:58 am PDT (09:58 UTC)
10,500 ft	270° at 12 kt	+12 kt	2 °C	108 kt	19 h 21 min	3:09 am PDT (10:09 UTC)
12,500 ft	270° at 14 kt	+14 kt	-1 °C	106 kt	19 h 42 min	3:30 am PDT (10:30 UTC)
14,500 ft	270° at 16 kt	+16 kt	-5 °C	104 kt	20 h 05 min	3:53 am PDT (10:53 UTC)
16,500 ft	270° at 18 kt	+18 kt	-9 °C	102 kt	20 h 29 min	4:17 am PDT (11:17 UTC)
18,000 ft FL180	270° at 20 kt	+19 kt	-12 °C	101 kt	20 h 41 min	4:29 am PDT (11:29 UTC)
24,000 ft FL240	270° at 22 kt	+22 kt	-25 °C	98 kt	21 h 19 min	5:07 am PDT (12:07 UTC)
30,000 ft FL300	260° at 28 kt	+26 kt	-37 °C	94 kt	22 h 13 min	6:01 am PDT (13:01 UTC)
34,000 ft FL340	270° at 35 kt	+35 kt	-41 °C	85 kt	24 h 35 min	8:23 am PDT (15:23 UTC)
39,000 ft FL390	270° at 45 kt	+47 kt	-47 °C	73 kt	28 h 37 min	12:25 pm PDT (19:25 UTC)

Based on data from the 12th at 12:00 UTC; valid on the 12th at 18:00 UTC for use 14:00 to 21:00 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	360/20	340/23 11°	340/26 8°	350/26 3°	350/30 -8°	350/36 -21°	350/52 -36°	350/54 -44°	320/45 -53°
AVP	used from 50 nm out; 30 nm from the line	330/21	340/24 14°	350/27 9°	350/25 3°	330/29 -8°	310/31 -20°	330/41 -36°	330/57 -46°	320/55 -51°
SYR	used from 150 nm out; 67 nm from the line	290/24	310/27 13°	310/34 8°	320/32 2°	300/32 -10°	300/40 -21°	300/45 -37°	310/58 -47°	310/64 -54°
BUF	used from 200 nm out; 26 nm from the line	270/25	300/28 14°	300/29 8°	310/29 2°	300/30 -9°	290/33 -21°	290/44 -37°	290/56 -47°	300/62 -51°
TVC	used from 400 nm out; 142 nm from the line	260/18	250/30 15°	260/34 8°	280/29 5°	280/36 -10°	280/37 -22°	270/50 -37°	290/46 -42°	300/60 -49°
GRB	used from 650 nm out; 55 nm from the line	260/10	240/27 16°	260/31 10°	270/25 5°	280/31 -10°	280/35 -22°	270/46 -37°	290/43 -40°	300/64 -48°
DLH	used from 750 nm out; 99 nm from the line	090/34	210/13 14°	240/14 11°	250/20 4°	250/38 -10°	260/39 -22°	250/41 -37°	270/53 -41°	280/68 -48°
AXN	used from 949 nm out; 54 nm from the line	110/18	200/12 17°	220/22 12°	230/26 4°	240/31 -10°	240/45 -21°	240/38 -36°	250/49 -38°	260/56 -47°
GFK	used from 1049 nm out; 55 nm from the line	100/10	150/9 10°	200/19 7°	230/27 1°	240/51 -11°	230/43 -23°	230/40 -36°	240/56 -40°	260/67 -47°
MOT	used from 1149 nm out; 84 nm from the line		L/V 2°	220/12 2°	220/27 0°	220/36 -12°	230/33 -24°	230/39 -34°	230/50 -39°	250/63 -46°
DIK	used from 1249 nm out; 53 nm from the line		330/11 1°	230/20 4°	220/22 0°	230/29 -12°	240/27 -25°	240/40 -34°	230/49 -37°	240/55 -44°
GGW	used from 1349 nm out; 85 nm from the line		360/9 -3°	L/V -4°	250/12 -4°	250/21 -12°	230/25 -27°	220/53 -34°	230/59 -38°	240/64 -44°
GTF	used from 1549 nm out; 79 nm from the line		L/V	L/V -4°	230/12 -3°	210/12 -17°	190/23 -29°	200/48 -39°	210/69 -39°	220/66 -42°
GPI	used from 1699 nm out; 44 nm from the line		L/V -3°	L/V -4°	L/V -6°	210/19 -17°	220/26 -32°	190/23 -40°	220/25 -39°	220/34 -42°
GEG	used from 1849 nm out; 26 nm from the line		060/10 -2°	050/11 -3°	050/9 -8°	050/27 -19°	040/26 -31°	030/32 -39°	020/19 -41°	L/V -42°
YKM	used from 1999 nm out; 66 nm from the line	L/V	350/9 0°	040/20 -5°	030/23 -8°	020/41 -18°	010/74 -27°	010/73 -40°	020/54 -44°	350/9 -43°
SEA	used from 2049 nm out; 22 nm from the line	L/V	L/V 1°	020/13 -2°	020/27 -4°	010/43 -14°	360/54 -26°	360/63 -40°	010/60 -48°	350/39 -50°

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	marginal VFR Sky: a broken layer at 1,400 feet, a broken layer at 2,300 feet	from the north-northwest (330°) at 10 knots	10+ mi	1,400 ft	439 ft	10:14 am EDT (14:14 UTC)
ELM Elmira/Corning, NY	160 nm out, 5 nm south of the line, tower	marginal VFR Sky: scattered clouds at 500 feet, overcast at 1,400 feet	from the west-southwest (240°) at 6 knots	10+ mi	1,400 ft	955 ft	14:38 UTC
BUF Buffalo, NY	250 nm out, 4 nm north of the line, tower	marginal VFR Sky: a few clouds at 900 feet, overcast at 1,400 feet Weather: light drizzle	from the west-southwest (240°) at 8 knots	10+ mi	1,400 ft	726 ft	14:25 UTC
GOV Grayling, MI	530 nm out, 4 nm north of the line, tower	VFR Sky: a broken layer at 20,000 feet Weather: mist	calm	6 mi	20,000 ft	1,158 ft	13:55 UTC
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	IFR Sky: overcast at 700 feet	from the east (080°) at 8 knots, gusting to 17	10+ mi	700 ft	1,206 ft	14:35 UTC
FAR Fargo, ND	1049 nm out, 5 nm southwest of the line, tower	low IFR Sky: overcast at 300 feet Weather: mist	from the north (010°) at 10 knots	1.5 mi	300 ft	901 ft	13:53 UTC
SDY Sidney, MT	1359 nm out, 2 nm southeast of the line	IFR Sky: overcast at 600 feet Weather: light rain	from the north-northeast (030°) at 7 knots	10+ mi	600 ft	1,985 ft	13:56 UTC
GPI Kalispell, MT	1759 nm out, 21 nm north of the line, tower	VFR	from the north (360°) at 7 knots	10+ mi	none	2,976 ft	13:55 UTC
SFF Spokane, WA	1889 nm out, 11 nm south of the line, tower	VFR Sky: a few clouds at 6,000 feet, overcast at 8,500 feet	from the east-northeast (070°) at 6 knots	10+ mi	8,500 ft	1,956 ft	13:53 UTC
BFI Seattle, WA	destination	VFR	from the southeast (130°) at 3 knots	10+ mi	none	21 ft	6:53 am PDT (13:53 UTC)

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, 1:58 am PDT (08:58 UTC)

Wind calm, visibility more than 6 miles, scattered clouds at 25,000 feet VFR

The whole forecast for BFI

From Mon 5:00 am PDT (12:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
From Mon 12:00 pm PDT (19:00 UTC): wind from the west-southwest at 4 knots, visibility more than 6 miles, clear skies
From Mon 2:00 pm PDT (21:00 UTC): wind from the west-northwest at 5 knots, visibility more than 6 miles, clear skies
From Mon 8:00 pm PDT (03:00 UTC): wind calm, visibility more than 6 miles, scattered clouds at 25,000 feet
From Tue 4:00 am PDT (11:00 UTC): wind from the south-southeast at 4 knots, visibility more than 6 miles, overcast at 10,000 feet

The forecast for HPN, the departure

From Mon 11:00 am EDT (15:00 UTC): wind from the north-northwest at 8 knots, visibility more than 6 miles, scattered clouds at 2,500 feet, a broken layer at 3,500 feet
At times between Mon 11:00 am EDT (15:00 UTC) and 12:00 pm EDT (16:00 UTC): a broken layer at 2,500 feet
From Mon 1:00 pm EDT (17:00 UTC): wind from the north-northwest at 9 knots, visibility more than 6 miles, a few clouds at 2,500 feet, scattered clouds at 5,000 feet
From Mon 10:00 pm EDT (02:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 5,000 feet, a few clouds at 15,000 feet

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
6/8927 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local 8 nm from the route, 1759 nm along the route · a VIP movement · starts Wednesday 14 October · ZSE
6/8923 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local 8 nm from the route, 1759 nm along the route · a VIP movement · starts Wednesday 14 October · ZLC

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)). At 120 knots the arrival at BFI is before sunrise there (7:24 am PDT (14:24 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

Radar now, the Northeast · loop National Weather Service

Radar now, the central Great Lakes · loop National Weather Service

Radar now, the upper Mississippi valley · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

Forecast chart, 24 hours ahead Weather Prediction Center

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.