Plan a flight · Sun 10:53 pm PDT (05:53 UTC)

Boeing Fld/King County International to Philadelphia International BFI → PHL

2,061 nautical miles (2,371 statute miles) east on a straight line, true course 085°, about 070° magnetic at the departure end (variation 15E). At 120 knots that is 12 h 29 min at the quickest height in today's winds (39,000 ft, a 45-knot tailwind), arriving about 2:22 pm EDT (18:22 UTC). Right now BFI is VFR, wind calm; PHL is marginal VFR, wind from the northeast (050°) at 11 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: 3 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 E19E: thunderstorms (a convective SIGMET) up to 43,000 ft, moving from the southwest at 20 knots, until 11:55 pm PDT (06:55 UTC). Over the last 70 nm of the route.

as issued

WSUS31 KKCI 120455
MKCE WST 120455
CONVECTIVE SIGMET 19E
VALID UNTIL 0655Z
CT NY NJ PA DE MD VA DC WV AND DE NJ NY MD CT VA CSTL WTRS
FROM 20NNW HTO-70SSE HTO-90SE SIE-20WNW LYH-40ESE AIR-20NNW HTO
AREA EMBD TS MOV FROM 24020KT. TOPS TO FL430.

AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 189 nm of the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 129 to 667 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 249 to 548 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 269 to 1095 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 279 to 468 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 677 to 677 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 1284 to 1404 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 508 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1842 to 1981 nm out.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 159 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 B39M at 35,000 ft, 38 nm northeast, 8:15 pm PDT (03:15 UTC): remarks: no inj/dmg zob. 1792 nm along the route, 38 nm northeast of the line.
as filed, and in English
```
DKK UUA /OV DKK280040/TM 0315/FL350/TP B39M/TB MTN WVE ACTN +/-5KTS/RM NO INJ/DMG ZOB
```
Report
an urgent report filed through DKK
Where
40 nm west (280°) of DKK
Time
03:15 UTC
Height
at 35,000 ft
Aircraft
B39M
Turbulence
mountain wve actn a 5-knot loss of airspeed
Remarks
no inj/dmg zob
A319 at 23,000 ft, 34 nm east, 8:21 pm PDT (03:21 UTC): moderate turbulence. At the destination end, 34 nm east of the line.
as filed, and in English
```
MJX UA /OV CYN345010/TM 0321/FL230/TP A319/TB MOD
```
Report
a routine report filed through MJX
Where
10 nm north (345°) of CYN
Time
03:21 UTC
Height
at 23,000 ft
Aircraft
A319
Turbulence
moderate
CL30 at 4,200 ft, 48 nm south, 8:16 pm PDT (03:16 UTC): no icing, overcast above 4,200 ft, remarks: during the descent ils runway 12. 338 nm along the route, 48 nm south of the line.
as filed, and in English
```
MSO UA /OV MSO/TM 0316/FL042/TP CL30/SK OVC042/WX 2 1/2SM/IC NEG/RM DURD ILS RY 12
```
Report
a routine report filed through MSO
Where
over MSO
Time
03:16 UTC
Height
at 4,200 ft
Aircraft
CL30
Sky
overcast from 4,200 ft
Weather
2, 1/2SM
Icing
none
Remarks
during the descent ils runway 12
A333 descending, 36 nm southwest, 10:44 pm PDT (05:44 UTC): a routine report with nothing remarked on. 1672 nm along the route, 36 nm southwest of the line.
as filed, and in English
```
DTW UA /OV DTW/TM 0544/FLDURD/TP A333/SK TOPS 025
```
Report
a routine report filed through DTW
Where
over DTW
Time
05:44 UTC
Height
during the descent
Aircraft
A333
Sky
tops 2,500 ft
B739 descending, 36 nm southwest, 9:54 pm PDT (04:54 UTC): a routine report with nothing remarked on. 1672 nm along the route, 36 nm southwest of the line.
as filed, and in English
```
DTW UA /OV DTW/TM 0454/FLDURD/TP B739/SK BASES 011
```
Report
a routine report filed through DTW
Where
over DTW
Time
04:54 UTC
Height
during the descent
Aircraft
B739
Sky
bases 1,100 ft
A320 descending, 36 nm southwest, 8:27 pm PDT (03:27 UTC): overcast above 1,400 ft. 1672 nm along the route, 36 nm southwest of the line.
as filed, and in English
```
DTW UA /OV DTW/TM 0327/FLDURD/TP A320/SK 014 OVC
```
Report
a routine report filed through DTW
Where
over DTW
Time
03:27 UTC
Height
during the descent
Aircraft
A320
Sky
at 1,400 ft overcast
E145 at 600 ft, 16 nm southwest, 8:20 pm PDT (03:20 UTC): overcast above 600 ft. At the destination end, 16 nm southwest of the line.
as filed, and in English
```
MDT UA /OV MDT/TM 0320/FL006/TP E145/SK OVC 006
```
Report
a routine report filed through MDT
Where
over MDT
Time
03:20 UTC
Height
at 600 ft
Aircraft
E145
Sky
overcast from 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 19 forecast points nearest it (SEA, YKM, GEG, GPI, GTF, GGW, MLS, DIK, ABR, AXN, MSP, LSE, GRB, MKG, CLE, AGC, PSB, AVP, ACY). 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	250° at 9 kt	−7 kt		127 kt	16 h 14 min	6:07 pm EDT (22:07 UTC)
5,500 ft	light and variable	0	3 °C	120 kt	17 h 10 min	7:03 pm EDT (23:03 UTC)
7,500 ft	240° at 3 kt	−2 kt	7 °C	122 kt	16 h 54 min	6:47 pm EDT (22:47 UTC)
9,500 ft	240° at 5 kt	−4 kt	3 °C	124 kt	16 h 37 min	6:30 pm EDT (22:30 UTC)
11,500 ft	240° at 9 kt	−6 kt	0 °C	126 kt	16 h 21 min	6:14 pm EDT (22:14 UTC)
13,500 ft	240° at 12 kt	−10 kt	-3 °C	130 kt	15 h 51 min	5:44 pm EDT (21:44 UTC)
15,500 ft	250° at 15 kt	−13 kt	-7 °C	133 kt	15 h 30 min	5:23 pm EDT (21:23 UTC)
17,500 ft	260° at 18 kt	−17 kt	-11 °C	137 kt	15 h 03 min	4:56 pm EDT (20:56 UTC)
18,000 ft FL180	260° at 19 kt	−18 kt	-12 °C	138 kt	14 h 56 min	4:49 pm EDT (20:49 UTC)
24,000 ft FL240	250° at 22 kt	−20 kt	-23 °C	140 kt	14 h 43 min	4:36 pm EDT (20:36 UTC)
30,000 ft FL300	260° at 25 kt	−24 kt	-37 °C	144 kt	14 h 19 min	4:12 pm EDT (20:12 UTC)
34,000 ft FL340	260° at 35 kt	−34 kt	-42 °C	154 kt	13 h 23 min	3:16 pm EDT (19:16 UTC)
39,000 ft FL390	260° at 46 kt	−45 kt	-48 °C	165 kt	12 h 29 min	2:22 pm EDT (18:22 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; 26 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; 63 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; 69 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 249 nm out; 63 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 398 nm out; 22 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 548 nm out; 77 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°
MLS	used from 647 nm out; 51 nm from the line		150/23 2°	190/29 4°	210/44 2°	220/32 -10°	210/36 -21°	200/48 -37°	230/63 -40°	240/71 -47°
DIK	used from 747 nm out; 26 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°
ABR	used from 896 nm out; 88 nm from the line	070/14	250/10 17°	270/16 11°	260/28 5°	260/36 -10°	260/41 -22°	270/33 -37°	260/42 -42°	260/50 -48°
AXN	used from 1045 nm out; 37 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°
MSP	used from 1145 nm out; 52 nm from the line	230/26	240/30 17°	240/24 12°	250/22 5°	250/35 -10°	260/36 -21°	250/41 -36°	250/49 -45°	260/58 -52°
LSE	used from 1294 nm out; 65 nm from the line	230/40	240/24 17°	240/13 10°	250/13 6°	280/22 -9°	250/28 -21°	250/41 -34°	260/42 -44°	270/62 -53°
GRB	used from 1344 nm out; 58 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°
MKG	used from 1493 nm out; 33 nm from the line	260/22	290/16 15°	300/11 10°	290/5 3°	300/26 -9°	300/32 -20°	320/48 -36°	320/61 -45°	310/74 -53°
CLE	used from 1643 nm out; 98 nm from the line	340/7	010/16 13°	350/18 8°	350/20 3°	340/31 -10°	340/46 -21°	340/54 -37°	330/62 -44°	340/65 -49°
AGC	used from 1792 nm out; 83 nm from the line	350/14	330/20 11°	340/18 8°	330/17 3°	340/22 -11°	340/31 -22°	330/33 -36°	300/34 -41°	300/35 -47°
PSB	used from 1842 nm out; 51 nm from the line		360/13 13°	330/14 7°	300/11 3°	290/12 -11°	240/23 -23°	270/25 -36°	250/34 -40°	250/45 -48°
AVP	used from 1991 nm out; 69 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°
ACY	used from 2041 nm out; 49 nm from the line	220/19	220/18 14°	210/36 9°	210/35 5°	220/36 -8°	240/49 -21°	220/90 -31°	230/103 -40°	230/81 -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	9:53 pm PDT (04:53 UTC)
SFF Spokane, WA	199 nm out, 3 nm southeast of the line, tower	VFR	calm	10+ mi	none	1,956 ft	04:53 UTC
COE Coeur D'Alene, ID	219 nm out, 5 nm northeast of the line	VFR Sky: overcast at 8,000 feet	from the north-northeast (030°) at 9 knots	10+ mi	8,000 ft	2,320 ft	04:56 UTC
GTF Great Falls, MT	438 nm out, 10 nm southeast of the line, tower	IFR Sky: overcast at 800 feet Weather: light snow, mist	from the north (360°) at 10 knots	3 mi	800 ft	3,680 ft	05:46 UTC
GDV Glendive, MT	707 nm out, 5 nm southeast of the line	low IFR Sky: overcast at 400 feet Weather: light rain	from the northeast (050°) at 12 knots	10+ mi	400 ft	2,458 ft	04:56 UTC
BIS Bismarck, ND	876 nm out, 4 nm northeast of the line, tower	IFR Sky: overcast at 800 feet	from the east-northeast (060°) at 12 knots	10+ mi	800 ft	1,661 ft	04:52 UTC
STC St Cloud, MN	1165 nm out, 4 nm south of the line, tower	VFR	from the north-northwest (340°) at 4 knots	10+ mi	none	1,030 ft	04:53 UTC
ATW Appleton, WI	1414 nm out, 5 nm south of the line, tower	VFR	from the south (180°) at 7 knots	10+ mi	none	918 ft	05:35 UTC
FNT Flint, MI	1633 nm out, 3 nm southeast of the line, tower	VFR Sky: scattered clouds at 700 feet	from the south-southwest (200°) at 4 knots	10+ mi	none	782 ft	05:44 UTC
PTK Pontiac, MI	1653 nm out, 12 nm south of the line, tower	IFR Sky: overcast at 900 feet	from the west-southwest (240°) at 5 knots	10+ mi	900 ft	980 ft	05:26 UTC
UNV State College, PA	1931 nm out, 5 nm west of the line, tower	low IFR Sky: overcast at 300 feet Weather: mist	from the north-northeast (020°) at 6 knots	1.5 mi	300 ft	1,231 ft	05:36 UTC
PHL Philadelphia, PA	destination	marginal VFR Sky: scattered clouds at 600 feet, overcast at 1,000 feet Weather: mist	from the northeast (050°) at 11 knots	5 mi	1,000 ft	35 ft	1:11 am EDT (05:11 UTC)

The highest airport on this list sits at 3,680 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At PHL when you get there the forecast at the estimated arrival, 2:22 pm EDT (18:22 UTC)

Wind from the north-northwest at 10 knots, gusting to 15, visibility more than 6 miles, scattered clouds at 5,000 feet VFR

The whole forecast for PHL

From Mon 2:00 am EDT (06:00 UTC): wind from the north-northeast at 8 knots, visibility 5 miles, light rain showers, mist, thunderstorms nearby, overcast at 700 feet (thunderheads)
From Mon 7:00 am EDT (11:00 UTC): wind from the north at 10 knots, visibility 5 miles, mist, overcast at 800 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the north at 10 knots, gusting to 15, visibility 6 miles, mist, a broken layer at 2,500 feet
From Mon 12:00 pm EDT (16:00 UTC): wind from the north-northwest at 10 knots, gusting to 15, visibility more than 6 miles, scattered clouds at 5,000 feet
From Mon 6:00 pm EDT (22:00 UTC): wind from the northwest at 8 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 9:00 pm EDT (01:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 25,000 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

6/6656 ANOKA, MN, Monday, October 5, 2026 through Monday, October 19, 2026 Local 15 nm from the route, 1205 nm along the route · security · until 19 October · ZMP
6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 12 nm from the route, 1802 nm along the route · a VIP movement · today · ZOB
6/8587 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 12 nm from the route, 1802 nm along the route · a VIP movement · today · ZOB

Daylight

Sunset at BFI 6:27 pm PDT (01:27 UTC), at PHL 6:26 pm EDT (22:26 UTC) (civil twilight ends 6:53 pm EDT (22:53 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, Philadelphia International.