Plan a flight · Mon 3:59 am PDT (10:59 UTC)

Boeing Fld/King County International to Republic Airport BFI → FRG

2,110 nautical miles (2,428 statute miles) east on a straight line, true course 083°, about 068° magnetic at the departure end (variation 15E). At 120 knots that is 12 h 38 min at the quickest height in today's winds (39,000 ft, a 47-knot tailwind), arriving about 7:37 pm EDT (23:37 UTC), after sunset at the destination. Right now BFI is VFR, wind calm; FRG is IFR, wind from the north (010°) at 10 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: 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 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 30 to 400 nm out.
AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 210 to 680 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 280 to 520 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 360 to 1210 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 690 to 790 nm out.
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 1500 to 1640 nm out.
AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the last 520 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, mist). Over the route from 1880 to 2030 nm out.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 24,000 ft to 33,000 ft. Over the last 110 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

urgent SF50 descending, 18 nm southwest, 3:50 am PDT (10:50 UTC): light turbulence, overcast above 1,200 ft, remarks: during the descent runway 5. At the destination end, 18 nm southwest of the line.
as filed, and in English
```
MMU UUA /OV MMU/TM 1050/FLDURD/TP SF50/SK OVC012/TB LGT/RM DURD RWY 5
```
Report
an urgent report filed through MMU
Where
over MMU
Time
10:50 UTC
Height
during the descent
Aircraft
SF50
Sky
overcast from 1,200 ft
Turbulence
light
Remarks
during the descent runway 5
BE20 at 15,000 ft, 41 nm south, 1:00 am PDT (08:00 UTC): light icing, 0 °C. 790 nm along the route, 41 nm south of the line.
as filed, and in English
```
DIK UA /OV DIK/TM 0800/FL150/TP BE20/TA 00/IC LGT CLR
```
Report
a routine report filed through DIK
Where
over DIK
Time
08:00 UTC
Height
at 15,000 ft
Aircraft
BE20
Temperature
0 °C
Icing
light clear
P28A at 4,000 ft, 1 nm northeast, 2:27 am PDT (09:27 UTC): no turbulence, no icing, overcast from 1,300 ft to 3,800 ft, 10 °C. 1020 nm along the route, 1 nm northeast of the line.
as filed, and in English
```
FAR UA /OV KFAR270015/TM 0927/FL040/TP P28A/SK OVC013-TOP038/TA 10/TB NEG/IC NEG
```
Report
a routine report filed through FAR
Where
15 nm west (270°) of KFAR
Time
09:27 UTC
Height
at 4,000 ft
Aircraft
P28A
Sky
overcast from 1,300 ft, tops 3,800 ft
Temperature
10 °C
Turbulence
none
Icing
none
B39M at 35,000 ft, 9 nm southwest, 1:30 am PDT (08:30 UTC): light chop turbulence above 35,000 ft. 1040 nm along the route, 9 nm southwest of the line.
as filed, and in English
```
FAR UA /OV FAR/TM 0830/FL350/TP B39M/TB CONS LGT CHOP 350
```
Report
a routine report filed through FAR
Where
over FAR
Time
08:30 UTC
Height
at 35,000 ft
Aircraft
B39M
Turbulence
continuous light chop at 35,000 ft
E75L at 20,000 ft, 25 nm south, 3:35 am PDT (10:35 UTC): light to moderate turbulence above 20,000 ft. 1190 nm along the route, 25 nm south of the line.
as filed, and in English
```
JMR UA /OV JMR/TM 1035/FL200/TP E75L/TB CONS LGT OCNL MOD 200
```
Report
a routine report filed through JMR
Where
over JMR
Time
10:35 UTC
Height
at 20,000 ft
Aircraft
E75L
Turbulence
continuous light occasional moderate at 20,000 ft
B738 climbing, 14 nm north, 3:20 am PDT (10:20 UTC): overcast from 2,500 ft to 4,200 ft; scattered clouds above 700 ft. 1840 nm along the route, 14 nm north of the line.
as filed, and in English
```
BUF UA /OV BUF/TM 1020/FLDURC/TP B738/SK SCT007 OVC025 TOPS042
```
Report
a routine report filed through BUF
Where
over BUF
Time
10:20 UTC
Height
during the climb
Aircraft
B738
Sky
SCT007 OVC025 TOPS042
C208 at 2,700 ft, 46 nm southwest, 3:01 am PDT (10:01 UTC): remarks: zob. 1870 nm along the route, 46 nm southwest of the line.
as filed, and in English
```
BFD UA /OV BFD/TM 1001/FL027/TP C208/SK BASE027 TOP043/RM ZOB
```
Report
a routine report filed through BFD
Where
over BFD
Time
10:01 UTC
Height
at 2,700 ft
Aircraft
C208
Sky
BASE027 TOP043
Remarks
zob
A319 at 3,000 ft, 34 nm north, 3:17 am PDT (10:17 UTC): overcast above 3,000 ft, remarks: bases 3,000 ft tops 4,000 ft. 1880 nm along the route, 34 nm north of the line.
as filed, and in English
```
ROC UA /OV ROC220010/TM 1017/FL030/TP A319/SK 030 OVC/RM BASES 030 TOPS 040
```
Report
a routine report filed through ROC
Where
10 nm southwest (220°) of ROC
Time
10:17 UTC
Height
at 3,000 ft
Aircraft
A319
Sky
at 3,000 ft overcast
Remarks
bases 3,000 ft tops 4,000 ft
A21N at 35,000 ft, 14 nm north, 1:52 am PDT (08:52 UTC): light to moderate chop turbulence, remarks: zob. 1890 nm along the route, 14 nm north of the line.
as filed, and in English
```
ROC UA /OV GEE190015/TM 0852/FL350/TP A21N/TB LGHT-MOD CHOP/RM ZOB
```
Report
a routine report filed through ROC
Where
15 nm south (190°) of GEE
Time
08:52 UTC
Height
at 35,000 ft
Aircraft
A21N
Turbulence
lght-mod chop
Remarks
zob
A320 climbing, 15 nm south, 3:42 am PDT (10:42 UTC): a routine report with nothing remarked on. At the destination end, 15 nm south of the line.
as filed, and in English
```
JFK UA /OV JFK150005/TM 1042/FLDURC/TP A320/SK 010-TOP024
```
Report
a routine report filed through JFK
Where
5 nm southeast (150°) of JFK
Time
10:42 UTC
Height
during the climb
Aircraft
A320
Sky
010-TOP024
B737 climbing, 15 nm east, 3:05 am PDT (10:05 UTC): a routine report with nothing remarked on. At the destination end, 15 nm east of the line.
as filed, and in English
```
ISP UA /OV ISP/TM 1005/FLDURC/TP B737/SK BASES 009
```
Report
a routine report filed through ISP
Where
over ISP
Time
10:05 UTC
Height
during the climb
Aircraft
B737
Sky
bases 900 ft

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 18 forecast points nearest it (SEA, YKM, GEG, GPI, GTF, GGW, DIK, MOT, GFK, AXN, DLH, GRB, TVC, CLE, BUF, SYR, AVP, JFK). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
3,500 ft	310° at 6 kt	−6 kt		126 kt	16 h 45 min	11:44 pm EDT (03:44 UTC)
5,500 ft	310° at 3 kt	−3 kt	0 °C	123 kt	17 h 09 min	12:08 am EDT (04:08 UTC)
7,500 ft	280° at 5 kt	−6 kt	6 °C	126 kt	16 h 45 min	11:44 pm EDT (03:44 UTC)
9,500 ft	270° at 8 kt	−9 kt	3 °C	129 kt	16 h 21 min	11:20 pm EDT (03:20 UTC)
11,500 ft	270° at 13 kt	−13 kt	0 °C	133 kt	15 h 52 min	10:51 pm EDT (02:51 UTC)
13,500 ft	270° at 15 kt	−15 kt	-3 °C	135 kt	15 h 38 min	10:37 pm EDT (02:37 UTC)
15,500 ft	270° at 17 kt	−17 kt	-8 °C	137 kt	15 h 24 min	10:23 pm EDT (02:23 UTC)
17,500 ft	270° at 19 kt	−20 kt	-12 °C	140 kt	15 h 04 min	10:03 pm EDT (02:03 UTC)
18,000 ft FL180	270° at 19 kt	−20 kt	-12 °C	140 kt	15 h 04 min	10:03 pm EDT (02:03 UTC)
24,000 ft FL240	270° at 22 kt	−23 kt	-24 °C	143 kt	14 h 45 min	9:44 pm EDT (01:44 UTC)
30,000 ft FL300	270° at 23 kt	−24 kt	-37 °C	144 kt	14 h 39 min	9:38 pm EDT (01:38 UTC)
34,000 ft FL340	270° at 36 kt	−36 kt	-43 °C	156 kt	13 h 32 min	8:31 pm EDT (00:31 UTC)
39,000 ft FL390	270° at 45 kt	−47 kt	-48 °C	167 kt	12 h 38 min	7:37 pm EDT (23:37 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; 26 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; 66 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 100 nm out; 69 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°
GPI	used from 250 nm out; 56 nm from the line		090/8 -4°	140/7 -7°	090/10 -8°	110/10 -19°	210/25 -30°	200/24 -40°	210/31 -39°	210/35 -42°
GTF	used from 400 nm out; 33 nm from the line		L/V	L/V -7°	240/8 -8°	240/30 -14°	240/40 -28°	210/52 -38°	210/76 -38°	220/72 -43°
GGW	used from 550 nm out; 62 nm from the line		100/7 -1°	070/10 -3°	190/6 -4°	210/34 -10°	230/33 -24°	210/48 -37°	230/65 -40°	230/71 -46°
DIK	used from 700 nm out; 82 nm from the line		190/12 5°	230/29 7°	220/33 1°	220/43 -11°	210/47 -23°	220/53 -33°	240/56 -40°	250/72 -47°
MOT	used from 800 nm out; 54 nm from the line		120/14 4°	190/25 5°	220/41 1°	240/43 -11°	230/39 -22°	220/44 -38°	240/62 -42°	250/73 -48°
GFK	used from 950 nm out; 69 nm from the line	080/18	L/V 11°	260/22 7°	250/48 3°	260/51 -11°	250/44 -22°	260/34 -38°	260/53 -44°	270/66 -49°
AXN	used from 1050 nm out; 56 nm from the line	110/6	260/10 16°	240/17 12°	250/20 5°	260/29 -10°	260/35 -22°	260/29 -38°	270/48 -41°	270/61 -48°
DLH	used from 1150 nm out; 62 nm from the line	090/31	250/7 14°	250/26 11°	250/36 4°	280/36 -11°	290/35 -22°	300/39 -38°	280/41 -44°	280/66 -49°
GRB	used from 1300 nm out; 110 nm from the line	250/32	250/22 17°	240/18 8°	280/21 6°	280/34 -11°	280/35 -21°	280/39 -37°	270/52 -45°	290/60 -49°
TVC	used from 1450 nm out; 48 nm from the line	270/31	280/23 15°	260/22 8°	260/29 4°	280/29 -11°	280/42 -21°	270/42 -36°	270/54 -47°	290/67 -51°
CLE	used from 1650 nm out; 144 nm from the line	310/7	350/20 14°	340/16 9°	320/21 2°	320/32 -8°	330/34 -20°	330/45 -36°	320/60 -45°	320/64 -51°
BUF	used from 1700 nm out; 114 nm from the line	300/11	330/15 11°	340/26 8°	330/28 2°	340/31 -10°	340/32 -21°	340/52 -37°	340/59 -46°	330/66 -53°
SYR	used from 1900 nm out; 74 nm from the line	330/17	320/14 9°	350/18 8°	350/26 2°	340/25 -11°	360/34 -22°	350/43 -39°	330/50 -46°	350/50 -54°
AVP	used from 1950 nm out; 29 nm from the line	010/20	020/24 11°	360/19 8°	350/23 2°	320/24 -11°	330/25 -22°	330/27 -37°	310/28 -42°	290/30 -50°
JFK	used from 2050 nm out; 26 nm from the line	020/25	290/9 12°	300/12 7°	320/14 3°	290/17 -10°	240/27 -21°	240/44 -36°	240/53 -41°	240/51 -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
BFI Seattle, WA	departure	VFR	calm	10+ mi	none	21 ft	3:53 am PDT (10:53 UTC)
SFF Spokane, WA	200 nm out, 10 nm south of the line, tower	VFR Sky: a few clouds at 11,000 feet	from the east (080°) at 5 knots	10+ mi	none	1,956 ft	10:53 UTC
GPI Kalispell, MT	330 nm out, 23 nm north of the line, tower	VFR Sky: overcast at 9,000 feet	from the north-northwest (340°) at 7 knots	10+ mi	9,000 ft	2,976 ft	10:55 UTC
GGW Glasgow, MT	630 nm out, 25 nm north of the line	marginal VFR Sky: overcast at 2,100 feet Weather: unknown precipitation	from the north-northeast (030°) at 8 knots	10+ mi	2,100 ft	2,295 ft	10:53 UTC
SDY Sidney, MT	730 nm out, 3 nm northeast of the line	IFR Sky: overcast at 800 feet Weather: light rain	from the north-northeast (030°) at 6 knots	10+ mi	800 ft	1,985 ft	10:56 UTC
FAR Fargo, ND	1040 nm out, 6 nm northwest of the line, tower	low IFR Sky: overcast at 400 feet Weather: mist	from the north-northeast (030°) at 12 knots	5 mi	400 ft	901 ft	10:53 UTC
HYR Hayward, WI	1260 nm out, 4 nm east of the line	IFR Sky: a broken layer at 800 feet	from the northeast (040°) at 8 knots	10+ mi	800 ft	1,215 ft	10:53 UTC
RHI Rhinelander, WI	1350 nm out, 3 nm north of the line	VFR	calm	10+ mi	none	1,623 ft	10:53 UTC
TVC Traverse City, MI	1520 nm out, 4 nm northeast of the line, tower	VFR Sky: overcast at 24,000 feet	from the south-southwest (200°) at 5 knots	10+ mi	24,000 ft	623 ft	10:53 UTC
BUF Buffalo, NY	1840 nm out, 15 nm north of the line, tower	marginal VFR Sky: a few clouds at 500 feet, overcast at 1,700 feet	from the west-southwest (250°) at 4 knots	10+ mi	1,700 ft	726 ft	10:54 UTC
ELM Elmira/Corning, NY	1930 nm out, 6 nm northeast of the line, tower	VFR Sky: scattered clouds at 100 feet, overcast at 3,200 feet	from the west (280°) at 3 knots	10+ mi	3,200 ft	955 ft	10:53 UTC
FRG Farmingdale, NY	destination	IFR Sky: overcast at 900 feet	from the north (010°) at 10 knots	10+ mi	900 ft	81 ft	6:53 am EDT (10:53 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 FRG when you get there the forecast at the estimated arrival, 7:37 pm EDT (23:37 UTC)

FRG has no terminal forecast; use the nearest airport that does.

The forecast for BFI, the departure

From Mon 2:00 am PDT (09:00 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 3 knots, visibility more than 6 miles, clear skies
From Mon 2:00 pm PDT (21:00 UTC): wind from the west at 5 knots, visibility more than 6 miles, clear skies
From Mon 7:00 pm PDT (02:00 UTC): wind calm, visibility more than 6 miles, clear skies

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 10 nm from the route, 320 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 10 nm from the route, 320 nm along the route · a VIP movement · starts Wednesday 14 October · ZOB
5/2811 NEW YORK, NY, Monday, October 20, 2025 through Tuesday, October 20, 2026 Local 10 nm from the route, at the destination end · security · until 20 October · ZNY

Daylight

Sunset at BFI 6:25 pm PDT (01:25 UTC), at FRG 6:18 pm EDT (22:18 UTC) (civil twilight ends 6:45 pm EDT (22:45 UTC)). At 120 knots the arrival at FRG is after sunset there (6:18 pm EDT (22:18 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 Pacific Northwest · loop National Weather Service

Radar now, the northern Rockies · 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: Boeing Fld/King County International, Republic Airport.