Plan a flight · Sun 6:49 pm PDT (01:49 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 16 min at the quickest height in today's winds (39,000 ft, a 48-knot tailwind), arriving about 10:05 am EDT (14:05 UTC). Right now BFI is VFR, wind from the northwest (310°) at 6 knots; PHL is IFR, wind from the northeast (040°) at 9 knots, gusting to 17. 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 2E: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the southwest at 20 knots, until 7:55 pm PDT (02:55 UTC). Over the last 70 nm of the route.

as issued

WSUS31 KKCI 120055
MKCE WST 120055
CONVECTIVE SIGMET 2E
VALID UNTIL 0255Z
CT NY NJ PA DE MD AND NJ NY CT CSTL WTRS
FROM 30NE SAX-30SSW HTO-30ESE EMI-50WSW HAR-30NE SAX
AREA EMBD TS MOV FROM 22020KT. TOPS TO FL310.

AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 159 nm of the route.
AIRMET ZULU 2C: moderate icing up to 16,000 ft. Over the route from 110 to 488 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 239 to 538 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 269 to 836 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 289 to 856 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 986 to 1085 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 408 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the route from 1812 to 2041 nm out.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1842 to 1981 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 BFI.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

E145 at 12,000 ft, 10 nm southwest, 5:43 pm PDT (00:43 UTC): moderate turbulence. At the destination end, 10 nm southwest of the line.
as filed, and in English
```
LNS UA /OV LRP/TM 0043/FL120/TP E145/TB CONS MOD
```
Report
a routine report filed through LNS
Where
over LRP
Time
00:43 UTC
Height
at 12,000 ft
Aircraft
E145
Turbulence
continuous moderate
A21N at 18,000 ft, 12 nm north, 5:38 pm PDT (00:38 UTC): moderate clear-air turbulence. At the destination end, 12 nm north of the line.
as filed, and in English
```
PTW UA /OV PTW/TM 0038/FL180/TP A21N/TB MOD CAT
```
Report
a routine report filed through PTW
Where
over PTW
Time
00:38 UTC
Height
at 18,000 ft
Aircraft
A21N
Turbulence
moderate clear-air turbulence
E75L at 20,000 ft, 18 nm southwest, 5:41 pm PDT (00:41 UTC): moderate turbulence above 20,000 ft. At the destination end, 18 nm southwest of the line.
as filed, and in English
```
ILG UA /OV DQO/TM 0041/FL200/TP E75L/TB MOD 200
```
Report
a routine report filed through ILG
Where
over DQO
Time
00:41 UTC
Height
at 20,000 ft
Aircraft
E75L
Turbulence
moderate at 20,000 ft
BCS3 at 19,000 ft, 41 nm south, 5:18 pm PDT (00:18 UTC): moderate turbulence above 17,000 ft, -9 °C. At the destination end, 41 nm south of the line.
as filed, and in English
```
DOV UA /OV ENO/TM 0018/FL190/TP BCS3/TA M09/TB MOD 170
```
Report
a routine report filed through DOV
Where
over ENO
Time
00:18 UTC
Height
at 19,000 ft
Aircraft
BCS3
Temperature
−9 °C
Turbulence
moderate at 17,000 ft
PC12 at 15,000 ft, 42 nm south, 5:42 pm PDT (00:42 UTC): remarks: zse. At the departure end, 42 nm south of the line.
as filed, and in English
```
YKM UA /OV YKM270050/TM 0042/FL150/TP PC12/SK TOP130/RM -ZSE
```
Report
a routine report filed through YKM
Where
50 nm west (270°) of YKM
Time
00:42 UTC
Height
at 15,000 ft
Aircraft
PC12
Sky
TOP130
Remarks
zse
PC12 at 13,000 ft, 42 nm south, 5:42 pm PDT (00:42 UTC): remarks: zse. At the departure end, 42 nm south of the line.
as filed, and in English
```
YKM UA /OV YKM270050/TM 0042/FL130/TP PC12/SK TOP130/RM -ZSE
```
Report
a routine report filed through YKM
Where
50 nm west (270°) of YKM
Time
00:42 UTC
Height
at 13,000 ft
Aircraft
PC12
Sky
TOP130
Remarks
zse
E75L descending, 37 nm north, 6:06 pm PDT (01:06 UTC): overcast above 4,000 ft. 329 nm along the route, 37 nm north of the line.
as filed, and in English
```
GPI UA /OV KGPI/TM 0106/FLDURD/TP E75L/SK OVC040
```
Report
a routine report filed through GPI
Where
over KGPI
Time
01:06 UTC
Height
during the descent
Aircraft
E75L
Sky
overcast from 4,000 ft
C25B at 4,100 ft, 48 nm south, 5:36 pm PDT (00:36 UTC): no icing, overcast above 4,100 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 0036/FL041/TP C25B/SK OVC041/IC NEG/RM DURD ILS RY 12
```
Report
a routine report filed through MSO
Where
over MSO
Time
00:36 UTC
Height
at 4,100 ft
Aircraft
C25B
Sky
overcast from 4,100 ft
Icing
none
Remarks
during the descent ils runway 12
CRJ2 at 2,900 ft, 7 nm south, 5:05 pm PDT (00:05 UTC): a routine report with nothing remarked on. 796 nm along the route, 7 nm south of the line.
as filed, and in English
```
DIK UA /OV DIK/TM 0005/FL029/TP CRJ2/SK BASE029
```
Report
a routine report filed through DIK
Where
over DIK
Time
00:05 UTC
Height
at 2,900 ft
Aircraft
CRJ2
Sky
BASE029
B38M at 32,000 ft, 46 nm north, 4:12 pm PDT (23:12 UTC): light chop turbulence. 796 nm along the route, 46 nm north of the line.
as filed, and in English
```
MOT UA /OV MOT225061/TM 2312/FL320/TP B38M/TB CONS LGT CHOP
```
Report
a routine report filed through MOT
Where
61 nm southwest (225°) of MOT
Time
23:12 UTC
Height
at 32,000 ft
Aircraft
B38M
Turbulence
continuous light chop
BE20 at 3,000 ft, 7 nm south, 3:56 pm PDT (22:56 UTC): no turbulence, no icing. 796 nm along the route, 7 nm south of the line.
as filed, and in English
```
DIK UA /OV DIK/TM 2256/FL030/TP BE20/SK BASE031/TB NEG/IC NEG
```
Report
a routine report filed through DIK
Where
over DIK
Time
22:56 UTC
Height
at 3,000 ft
Aircraft
BE20
Sky
BASE031
Turbulence
none
Icing
none
CRJ2 at 11,000 ft, 30 nm north, 5:53 pm PDT (00:53 UTC): no turbulence, no icing. 956 nm along the route, 30 nm north of the line.
as filed, and in English
```
JMS UA /OV JMS/TM 0053/FL110/TP CRJ2/SK BASE020-TOP040/TB NEG/IC NEG
```
Report
a routine report filed through JMS
Where
over JMS
Time
00:53 UTC
Height
at 11,000 ft
Aircraft
CRJ2
Sky
BASE020-TOP040
Turbulence
none
Icing
none
A320 descending, 47 nm north, 6:01 pm PDT (01:01 UTC): overcast above 1,200 ft, remarks: during the descent runway 36. 1035 nm along the route, 47 nm north of the line.
as filed, and in English
```
FAR UA /OV KFAR/TM 0101/FLUNKN/TP A320/SK OVC012-TOPUNKN/RM DURD RWY 36
```
Report
a routine report filed through FAR
Where
over KFAR
Time
01:01 UTC
Height
height not given
Aircraft
A320
Sky
overcast from 1,200 ft, tops unknown
Remarks
during the descent runway 36
C56X at 1,300 ft, 47 nm north, 4:17 pm PDT (23:17 UTC): overcast above 1,300 ft. 1035 nm along the route, 47 nm north of the line.
as filed, and in English
```
FAR UA /OV KFAR/TM 2317/FL013/TP C56X/SK OVC013
```
Report
a routine report filed through FAR
Where
over KFAR
Time
23:17 UTC
Height
at 1,300 ft
Aircraft
C56X
Sky
overcast from 1,300 ft

16 more routine reports are on the map.

Winds aloft along the route, and the time en route the forecast for use 20:00–03:00 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	230° at 5 kt	−2 kt		122 kt	16 h 54 min	2:43 pm EDT (18:43 UTC)
5,500 ft	light and variable	+1 kt	3 °C	119 kt	17 h 19 min	3:08 pm EDT (19:08 UTC)
7,500 ft	230° at 3 kt	−1 kt	7 °C	121 kt	17 h 02 min	2:51 pm EDT (18:51 UTC)
9,500 ft	230° at 6 kt	−3 kt	4 °C	123 kt	16 h 45 min	2:34 pm EDT (18:34 UTC)
11,500 ft	240° at 9 kt	−6 kt	1 °C	126 kt	16 h 21 min	2:10 pm EDT (18:10 UTC)
13,500 ft	240° at 12 kt	−9 kt	-3 °C	129 kt	15 h 59 min	1:48 pm EDT (17:48 UTC)
15,500 ft	240° at 16 kt	−12 kt	-7 °C	132 kt	15 h 37 min	1:26 pm EDT (17:26 UTC)
17,500 ft	240° at 19 kt	−15 kt	-12 °C	135 kt	15 h 16 min	1:05 pm EDT (17:05 UTC)
18,000 ft FL180	240° at 20 kt	−15 kt	-13 °C	135 kt	15 h 16 min	1:05 pm EDT (17:05 UTC)
24,000 ft FL240	250° at 25 kt	−21 kt	-23 °C	141 kt	14 h 37 min	12:26 pm EDT (16:26 UTC)
30,000 ft FL300	250° at 38 kt	−31 kt	-36 °C	151 kt	13 h 39 min	11:28 am EDT (15:28 UTC)
34,000 ft FL340	250° at 45 kt	−38 kt	-43 °C	158 kt	13 h 03 min	10:52 am EDT (14:52 UTC)
39,000 ft FL390	260° at 53 kt	−48 kt	-49 °C	168 kt	12 h 16 min	10:05 am EDT (14:05 UTC)

Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 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	360/9	350/10 1°	010/10 -5°	030/20 -11°	020/60 -17°	010/86 -26°	360/90 -40°	010/68 -42°	360/31 -43°
YKM	used from 50 nm out; 63 nm from the line	030/16	020/18 0°	030/30 -8°	030/23 -13°	020/40 -23°	010/73 -29°	010/54 -36°	360/29 -37°	330/16 -40°
GEG	used from 100 nm out; 69 nm from the line		050/18 -2°	060/19 -8°	L/V -11°	160/11 -24°	190/17 -31°	200/19 -35°	220/14 -37°	250/11 -41°
GPI	used from 249 nm out; 63 nm from the line		060/19 -3°	110/11 -8°	130/6 -8°	200/40 -19°	190/58 -28°	200/101 -39°	220/73 -43°	230/41 -43°
GTF	used from 398 nm out; 22 nm from the line		070/21	080/18 -6°	120/5 -5°	180/30 -14°	200/53 -24°	210/80 -38°	220/83 -44°	230/68 -46°
GGW	used from 548 nm out; 77 nm from the line		090/18 0°	140/12 -2°	150/13 -3°	200/35 -12°	230/56 -22°	240/75 -37°	240/81 -46°	240/78 -49°
MLS	used from 647 nm out; 51 nm from the line		120/22 5°	170/18 4°	200/33 1°	230/49 -10°	230/58 -21°	220/54 -37°	230/64 -44°	250/74 -49°
DIK	used from 747 nm out; 26 nm from the line		110/15 6°	200/17 5°	230/31 1°	240/47 -10°	240/52 -20°	230/52 -36°	240/57 -45°	250/67 -51°
ABR	used from 896 nm out; 88 nm from the line	030/24	220/5 16°	230/18 12°	230/32 5°	240/38 -10°	250/37 -20°	240/40 -35°	240/56 -44°	250/72 -52°
AXN	used from 1045 nm out; 37 nm from the line	L/V	220/23 17°	230/24 12°	240/25 5°	260/32 -11°	260/40 -21°	270/50 -35°	270/57 -45°	270/81 -55°
MSP	used from 1145 nm out; 52 nm from the line	200/28	240/30 19°	240/24 12°	240/17 5°	270/24 -10°	270/33 -20°	280/48 -35°	290/55 -45°	280/84 -54°
LSE	used from 1294 nm out; 65 nm from the line	220/33	250/29 17°	250/15 9°	260/12 6°	280/21 -9°	280/33 -20°	300/43 -36°	310/56 -45°	300/79 -53°
GRB	used from 1344 nm out; 58 nm from the line	240/24	260/18 16°	270/20 11°	290/14 4°	280/24 -9°	300/34 -21°	310/51 -38°	310/54 -48°	300/71 -51°
MKG	used from 1493 nm out; 33 nm from the line	250/5	320/10 15°	310/19 9°	320/21 3°	310/23 -10°	330/37 -22°	330/51 -38°	320/44 -47°	300/60 -49°
CLE	used from 1643 nm out; 98 nm from the line	340/5	320/13 14°	300/12 8°	310/10 2°	310/14 -10°	340/14 -23°	320/27 -35°	260/28 -40°	250/36 -48°
AGC	used from 1792 nm out; 83 nm from the line	140/12	350/10 12°	L/V 9°	L/V 3°	200/11 -11°	220/21 -22°	220/47 -33°	230/51 -39°	230/45 -48°
PSB	used from 1842 nm out; 51 nm from the line		260/13 13°	220/12 8°	220/11 4°	230/27 -11°	210/31 -21°	220/73 -32°	220/75 -40°	230/66 -50°
AVP	used from 1991 nm out; 69 nm from the line	110/36	190/34 13°	230/11 8°	230/16 4°	230/26 -8°	220/40 -19°	230/73 -33°	230/98 -41°	230/87 -51°
ACY	used from 2041 nm out; 49 nm from the line	230/15	230/22 15°	230/31 11°	230/27 6°	230/40 -7°	230/51 -17°	230/71 -31°	230/81 -41°	230/86 -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 northwest (310°) at 6 knots	10+ mi	none	21 ft	5:53 pm PDT (00:53 UTC)
SFF Spokane, WA	199 nm out, 3 nm southeast of the line, tower	VFR Sky: overcast at 6,500 feet	from the northeast (050°) at 12 knots, gusting to 19	10+ mi	6,500 ft	1,956 ft	00:53 UTC
COE Coeur D'Alene, ID	219 nm out, 5 nm northeast of the line	VFR Sky: overcast at 7,000 feet	from the north-northeast (030°) at 10 knots	10+ mi	7,000 ft	2,320 ft	00:56 UTC
GTF Great Falls, MT	438 nm out, 10 nm southeast of the line, tower	low IFR Sky: a broken layer at 400 feet, overcast at 800 feet Weather: light snow, mist	from the north-northeast (020°) at 10 knots	0.75 mi	400 ft	3,680 ft	01:08 UTC
GDV Glendive, MT	707 nm out, 5 nm southeast of the line	low IFR Sky: overcast at 400 feet Weather: light rain, mist	from the northeast (040°) at 15 knots	6 mi	400 ft	2,458 ft	00:56 UTC
BIS Bismarck, ND	876 nm out, 4 nm northeast of the line, tower	marginal VFR Sky: overcast at 1,200 feet	from the north-northeast (030°) at 13 knots	10+ mi	1,200 ft	1,661 ft	00:52 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	00:53 UTC
ATW Appleton, WI	1414 nm out, 5 nm south of the line, tower	VFR Sky: scattered clouds at 12,000 feet	from the south-southwest (200°) at 6 knots	10+ mi	none	918 ft	00:45 UTC
FNT Flint, MI	1633 nm out, 3 nm southeast of the line, tower	marginal VFR Sky: overcast at 1,100 feet	calm	10+ mi	1,100 ft	782 ft	00:53 UTC
PTK Pontiac, MI	1653 nm out, 12 nm south of the line, tower	IFR Sky: a broken layer at 500 feet, overcast at 1,000 feet Weather: mist	calm	5 mi	500 ft	980 ft	01:14 UTC
UNV State College, PA	1931 nm out, 5 nm west of the line, tower	low IFR Sky: overcast at 300 feet Weather: rain, mist	from the northeast (040°) at 5 knots	1.5 mi	300 ft	1,231 ft	01:35 UTC
PHL Philadelphia, PA	destination	IFR Sky: a broken layer at 600 feet, overcast at 900 feet Weather: mist	from the northeast (040°) at 9 knots, gusting to 17	6 mi	600 ft	35 ft	9:11 pm EDT (01:11 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, 10:05 am EDT (14:05 UTC)

Wind from the north at 12 knots, gusting to 19, visibility more than 6 miles, overcast at 2,500 feet marginal VFR

The whole forecast for PHL

From Sun 8:00 pm EDT (00:00 UTC): wind from the northeast at 10 knots, visibility 3 miles, light rain, mist, overcast at 800 feet
From Sun 11:00 pm EDT (03:00 UTC): wind from the north-northeast at 8 knots, visibility 5 miles, light rain, mist, overcast at 500 feet
From Mon 6:00 am EDT (10:00 UTC): wind from the north-northeast 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 12 knots, gusting to 19, visibility more than 6 miles, overcast at 2,500 feet
From Mon 2:00 pm EDT (18:00 UTC): wind from the north at 12 knots, gusting to 21, visibility more than 6 miles, overcast at 5,000 feet
From Mon 6:00 pm EDT (22:00 UTC): wind from the west-northwest at 8 knots, visibility more than 6 miles, scattered clouds at 25,000 feet

The forecast for BFI, the departure

From Sun 5:00 pm PDT (00:00 UTC): wind from the north-northwest at 8 knots, gusting to 18, visibility more than 6 miles, a few clouds at 5,000 feet
From Sun 7:00 pm PDT (02:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
From Mon 3:00 am PDT (10:00 UTC): wind light and variable, 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

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.