Plan a flight · Mon 12:08 am PDT (07:08 UTC)

Boeing Fld/King County International to Laurence G Hanscom Field BFI → BED

2,147 nautical miles (2,471 statute miles) east on a straight line, true course 079°, about 064° magnetic at the departure end (variation 15E). At 120 knots that is 12 h 33 min at the quickest height in today's winds (39,000 ft, a 51-knot tailwind), arriving about 3:41 pm EDT (19:41 UTC). Right now BFI is VFR, wind from the south-southeast (160°) at 4 knots; BED is IFR, wind from the north (010°) at 7 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

AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 200 nm of the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 140 to 739 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 260 to 390 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 290 to 479 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 350 to 1239 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 240 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 230 nm of the route.
AIRMET ZULU 1C: moderate icing up to 22,000 ft. Over the last 210 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1948 to 2088 nm out.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 10,000 ft. Over the last 70 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

UAL330 at 35,000 ft, 17 nm northeast, 9:30 pm PDT (04:30 UTC): moderate turbulence, wind 235° at 92 knots. At the destination end, 17 nm northeast of the line.
as filed, and in English
```
ARP UAL330 4257N 07145W 0430 F350 235/092KT TB MOD TURB CONT MOD CHOP IC
```
Report
a routine report filed through ARP
B38M at 34,000 ft, 28 nm south, 9:56 pm PDT (04:56 UTC): light chop turbulence. 879 nm along the route, 28 nm south of the line.
as filed, and in English
```
MOT UA /OV MOT115040/TM 0456/FL340/TP B38M/TB LGT CHOP
```
Report
a routine report filed through MOT
Where
40 nm southeast (115°) of MOT
Time
04:56 UTC
Height
at 34,000 ft
Aircraft
B38M
Turbulence
light chop
B763 descending, 22 nm northeast, 11:21 pm PDT (06:21 UTC): overcast above 40,000 ft. At the destination end, 22 nm northeast of the line.
as filed, and in English
```
MHT UA /OV KMHT/TM 0621/FLDURD/TP B763/SK OVC004
```
Report
a routine report filed through MHT
Where
over KMHT
Time
06:21 UTC
Height
during the descent
Aircraft
B763
Sky
overcast from 400 ft
B763 descending, 22 nm northeast, 10:55 pm PDT (05:55 UTC): a routine report with nothing remarked on. At the destination end, 22 nm northeast of the line.
as filed, and in English
```
MHT UA /OV RWY 35/TM 0555/FLDURD/TP B763/SK 004-005 FT
```
Report
a routine report filed through MHT
Where
runway 35
Time
05:55 UTC
Height
during the descent
Aircraft
B763
Sky
from 400 ft to 500 ft ft
CRJ7 descending, 22 nm northeast, 9:09 pm PDT (04:09 UTC): a routine report with nothing remarked on. At the destination end, 22 nm northeast of the line.
as filed, and in English
```
MHT UA /OV RWY 6/TM 0409/FLDURD/TP CRJ7/SK 006
```
Report
a routine report filed through MHT
Where
runway 6
Time
04:09 UTC
Height
during the descent
Aircraft
CRJ7
Sky
at 600 ft

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 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 16 forecast points nearest it (SEA, YKM, GEG, GPI, GTF, GGW, MOT, GFK, INL, DLH, GRB, TVC, BUF, SYR, ALB, BOS). 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	290° at 3 kt	−2 kt		122 kt	17 h 36 min	8:44 pm EDT (00:44 UTC)
5,500 ft	060° at 3 kt	+2 kt	0 °C	118 kt	18 h 12 min	9:20 pm EDT (01:20 UTC)
7,500 ft	light and variable	0	5 °C	120 kt	17 h 54 min	9:02 pm EDT (01:02 UTC)
9,500 ft	260° at 4 kt	−3 kt	2 °C	123 kt	17 h 27 min	8:35 pm EDT (00:35 UTC)
11,500 ft	250° at 8 kt	−7 kt	-1 °C	127 kt	16 h 54 min	8:02 pm EDT (00:02 UTC)
13,500 ft	250° at 12 kt	−11 kt	-4 °C	131 kt	16 h 23 min	7:31 pm EDT (23:31 UTC)
15,500 ft	250° at 17 kt	−16 kt	-8 °C	136 kt	15 h 47 min	6:55 pm EDT (22:55 UTC)
17,500 ft	260° at 21 kt	−20 kt	-12 °C	140 kt	15 h 20 min	6:28 pm EDT (22:28 UTC)
18,000 ft FL180	260° at 22 kt	−21 kt	-13 °C	141 kt	15 h 14 min	6:22 pm EDT (22:22 UTC)
24,000 ft FL240	250° at 27 kt	−25 kt	-23 °C	145 kt	14 h 48 min	5:56 pm EDT (21:56 UTC)
30,000 ft FL300	260° at 32 kt	−31 kt	-37 °C	151 kt	14 h 13 min	5:21 pm EDT (21:21 UTC)
34,000 ft FL340	260° at 37 kt	−36 kt	-44 °C	156 kt	13 h 46 min	4:54 pm EDT (20:54 UTC)
39,000 ft FL390	260° at 54 kt	−51 kt	-49 °C	171 kt	12 h 33 min	3:41 pm EDT (19:41 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
SEA	used from 0 nm out; 27 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°
YKM	used from 50 nm out; 71 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°
GEG	used from 100 nm out; 71 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°
GPI	used from 250 nm out; 52 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°
GTF	used from 400 nm out; 60 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°
GGW	used from 549 nm out; 60 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°
MOT	used from 749 nm out; 71 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°
GFK	used from 949 nm out; 37 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°
INL	used from 1099 nm out; 60 nm from the line	080/23	L/V 9°	260/22 5°	260/27 0°	260/43 -11°	270/47 -21°	270/57 -36°	270/54 -47°	270/69 -56°
DLH	used from 1199 nm out; 40 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°
GRB	used from 1348 nm out; 148 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°
TVC	used from 1398 nm out; 137 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°
BUF	used from 1698 nm out; 154 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°
SYR	used from 1848 nm out; 84 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°
ALB	used from 1998 nm out; 37 nm from the line	120/9	270/8 10°	L/V 5°	260/9 1°	260/34 -10°	250/42 -22°	240/57 -35°	240/70 -42°	240/65 -50°
BOS	used from 2098 nm out; 39 nm from the line	110/20	200/26 12°	280/24 8°	260/29 3°	250/47 -10°	230/59 -19°	230/74 -33°	240/95 -41°	240/96 -53°

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	from the south-southeast (160°) at 4 knots	10+ mi	none	21 ft	11:53 pm PDT (06:53 UTC)
SFF Spokane, WA	200 nm out, 24 nm south of the line, tower	VFR Sky: a few clouds at 9,000 feet, a broken layer at 11,000 feet	calm	10+ mi	11,000 ft	1,956 ft	06:53 UTC
GPI Kalispell, MT	330 nm out, 3 nm west of the line, tower	VFR Sky: overcast at 6,500 feet	from the north (360°) at 12 knots	10+ mi	6,500 ft	2,976 ft	06:55 UTC
LTY Chester, MT	459 nm out, 3 nm northwest of the line	no report just now				3,184 ft
MOT Minot, ND	849 nm out, 8 nm southwest of the line, tower	marginal VFR Sky: scattered clouds at 700 feet, a broken layer at 2,400 feet, overcast at 8,500 feet Weather: light rain	from the north-northeast (020°) at 10 knots, gusting to 20	10+ mi	2,400 ft	1,715 ft	07:02 UTC
GFK Grand Forks, ND	1009 nm out, 8 nm south of the line, tower	IFR Sky: overcast at 700 feet	from the north (010°) at 13 knots	10+ mi	700 ft	845 ft	06:53 UTC
FOZ Bigfork, MN	1149 nm out, 6 nm northeast of the line	IFR Sky: overcast at 600 feet	from the northeast (050°) at 6 knots	10+ mi	600 ft	1,351 ft	06:55 UTC
SAW Marquette, MI	1418 nm out, 25 nm south of the line, tower	VFR	from the east-northeast (070°) at 5 knots	10+ mi	none	1,204 ft	06:58 UTC
CIU Sault Ste Marie, MI	1538 nm out, 3 nm northeast of the line	VFR	from the southwest (230°) at 5 knots	10+ mi	none	799 ft	06:56 UTC
CYQA Muskoka,	1768 nm out, 1 nm east of the line	IFR Sky: a broken layer at 600 feet, overcast at 1,300 feet Weather: light rain, mist	variable at 2 knots	3 mi	600 ft	925 ft	07:00 UTC
ASH Nashua, NH	2128 nm out, 13 nm northeast of the line, tower	low IFR Sky: overcast at 400 feet Weather: light rain	variable at 5 knots	10+ mi	400 ft	200 ft	06:56 UTC
BED Bedford, MA	destination	IFR Sky: overcast at 600 feet	from the north (010°) at 7 knots	7 mi	600 ft	132 ft	2:51 am EDT (06:51 UTC)

The highest airport on this list sits at 3,184 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At BED when you get there the forecast at the estimated arrival, 3:41 pm EDT (19:41 UTC)

Wind from the north-northwest at 4 knots, visibility more than 6 miles, a few clouds at 9,000 feet VFR

The whole forecast for BED

From Mon 2:00 am EDT (06:00 UTC): wind from the north-northeast at 6 knots, visibility 3 miles, light rain, mist, overcast at 500 feet
From Mon 7:00 am EDT (11:00 UTC): wind from the north at 7 knots, visibility 5 miles, mist, overcast at 500 feet
From Mon 11:00 am EDT (15:00 UTC): wind from the north-northwest at 3 knots, visibility more than 6 miles, scattered clouds at 1,500 feet
From Mon 1:00 pm EDT (17:00 UTC): wind from the north-northwest at 4 knots, visibility more than 6 miles, a few clouds at 9,000 feet

The forecast for BFI, the departure

From Sun 11:00 pm PDT (06:00 UTC): wind calm, visibility more than 6 miles, clear skies
From Mon 3:00 am PDT (10:00 UTC): wind calm, visibility more than 6 miles, patches of fog, clear skies
From Mon 9:00 am PDT (16:00 UTC): wind from the south-southeast at 3 knots, 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

6/4348 GRAND FORKS AFB, ND, Sunday, March 8, 2026 through Sunday, November 1, 2026 Local on the route, 999 nm along the route · security · until 1 November · ZMP
6/8665 9NM E HERMAN, MI, Friday, October 9, 2026 through Tuesday, October 13, 2026 UTC 11 nm from the route, 1388 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 13 October · ZMP
6/8771 NW NEGAUNEE, MI, Saturday, October 10, 2026 through Thursday, October 15, 2026 UTC 8 nm from the route, 1408 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 15 October · ZMP
6/8802 Foxborough, MA, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 22 nm from the route, at the destination end · drones kept away from a public gathering · starts Saturday 17 October · ZBW

Daylight

Sunset at BFI 6:25 pm PDT (01:25 UTC), at BED 6:08 pm EDT (22:08 UTC) (civil twilight ends 6:36 pm EDT (22:36 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, Laurence G Hanscom Field.