Plan a flight · Mon 8:55 am PDT (15:55 UTC)

Boeing Fld/King County International to Oakland County International BFI → PTK

1,656 nautical miles (1,905 statute miles) east on a straight line, true course 086°, about 071° magnetic at the departure end (variation 15E). At 120 knots that is 10 h 25 min at the quickest height in today's winds (39,000 ft, a 39-knot tailwind), arriving about 10:20 pm EDT (02:20 UTC), after sunset at the destination. Right now BFI is VFR, wind from the south-southeast (160°) at 3 knots; PTK is VFR, wind from the southwest (220°) at 4 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

SIGMET C22C: thunderstorms (a convective SIGMET) up to 37,000 ft, moving from the southwest at 40 knots, until 9:55 am PDT (16:55 UTC). Over the route from 868 to 977 nm out.

as issued

WSUS32 KKCI 121455
MKCC WST 121455
CONVECTIVE SIGMET 22C
VALID UNTIL 1655Z
SD ND
FROM 60W GFK-30WNW FAR-40NNE PIR-50NNE DPR-30NNW BIS-60W GFK
AREA TS MOV FROM 21040KT. TOPS TO FL370.

AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 40 to 439 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 299 to 529 nm out.
AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 339 to 708 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 369 to 1197 nm out.
AIRMET ZULU 2C: moderate icing up to 22,000 ft. Over the route from 718 to 977 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

E170 at 28,000 ft, 29 nm south, 6:10 am PDT (13:10 UTC): moderate chop turbulence. 1566 nm along the route, 29 nm south of the line.
as filed, and in English
```
GRR UA /OV VIO/TM 1310/FL280/TP E170/TB OCNL MOD CHOP
```
Report
a routine report filed through GRR
Where
over VIO
Time
13:10 UTC
Height
at 28,000 ft
Aircraft
E170
Turbulence
occasional moderate chop
CRJ9 at 32,000 ft, 48 nm south, 8:22 am PDT (15:22 UTC): no turbulence above 32,000 ft, remarks: zse. At the departure end, 48 nm south of the line.
as filed, and in English
```
SEA UA /OV SEA160042/TM 1522/FL320/TP CRJ9/TB NEG 320/RM ZSE
```
Report
a routine report filed through SEA
Where
42 nm south (160°) of SEA
Time
15:22 UTC
Height
at 32,000 ft
Aircraft
CRJ9
Turbulence
no at 32,000 ft
Remarks
zse
SR22 at 6,000 ft, 15 nm south, 7:12 am PDT (14:12 UTC): a trace of rime icing. 190 nm along the route, 15 nm south of the line.
as filed, and in English
```
GEG UA /OV GEG140009/TM 1412/FL060/TP SR22/IC TRACE RIME OAT M4
```
Report
a routine report filed through GEG
Where
9 nm southeast (140°) of GEG
Time
14:12 UTC
Height
at 6,000 ft
Aircraft
SR22
Icing
trace rime oat −4 °C
A320 at 25,000 ft, 13 nm south, 6:25 am PDT (13:25 UTC): light to moderate chop turbulence above 25,000 ft, remarks: zse. 269 nm along the route, 13 nm south of the line.
as filed, and in English
```
MLP UA /OV MLP/TM 1325/FL250/TP A320/TB CONS LGT OCNL MOD CHOP 250 /RM ZSE
```
Report
a routine report filed through MLP
Where
over MLP
Time
13:25 UTC
Height
at 25,000 ft
Aircraft
A320
Turbulence
continuous light occasional moderate chop at 25,000 ft
Remarks
zse
C25B at 11,000 ft, 45 nm south, 7:13 am PDT (14:13 UTC): a routine report with nothing remarked on. 329 nm along the route, 45 nm south of the line.
as filed, and in English
```
MSO UA /OV MSO/TM 1413/FL110/TP C25B/SK TOP 110
```
Report
a routine report filed through MSO
Where
over MSO
Time
14:13 UTC
Height
at 11,000 ft
Aircraft
C25B
Sky
top 11,000 ft
DC3T at 8,500 ft, 8 nm south, 7:03 am PDT (14:03 UTC): light to moderate rime icing above 8,000 ft, -8 °C. 439 nm along the route, 8 nm south of the line.
as filed, and in English
```
GTF UA /OV 300025/TM 1403/FL085/TP DC3T/TA M8/IC LGT-MOD RIME 080
```
Report
a routine report filed through GTF
Where
wind from 300° at 25 knots
Time
14:03 UTC
Height
at 8,500 ft
Aircraft
DC3T
Temperature
−8 °C
Icing
light to moderate rime at 8,000 ft
A319 at 7,500 ft, 8 nm south, 6:41 am PDT (13:41 UTC): overcast from 30,000 ft to 7,500 ft. 439 nm along the route, 8 nm south of the line.
as filed, and in English
```
GTF UA /OV 180010/TM 1341/FL075/TP A319/SK OVC003-TOPS075
```
Report
a routine report filed through GTF
Where
wind from 180° at 10 knots
Time
13:41 UTC
Height
at 7,500 ft
Aircraft
A319
Sky
overcast from 300 ft, tops 7,500 ft
P212 at 8,000 ft, 47 nm north, 7:45 am PDT (14:45 UTC): no turbulence, light icing, -5 °C. 529 nm along the route, 47 nm north of the line.
as filed, and in English
```
HVR UA /OV HVR110030/TM 1445/FL080/TP P212/TA M5/TB NEG/IC LGT CLR /ZLC
```
Report
a routine report filed through HVR
Where
30 nm east (110°) of HVR
Time
14:45 UTC
Height
at 8,000 ft
Aircraft
P212
Temperature
−5 °C
Turbulence
none
Icing
light clear zlc
C340 at 6,000 ft, 19 nm northeast, 7:55 am PDT (14:55 UTC): no turbulence, light icing, -2 °C. 688 nm along the route, 19 nm northeast of the line.
as filed, and in English
```
SDY UA /OV SDY240043/TM 1455/FL060/TP C340/TA M02/TB NEG/IC LGT CLR/ZLC
```
Report
a routine report filed through SDY
Where
43 nm southwest (240°) of SDY
Time
14:55 UTC
Height
at 6,000 ft
Aircraft
C340
Temperature
−2 °C
Turbulence
none
Icing
light clr/zlc
UNKN , 40 nm north, 8:10 am PDT (15:10 UTC): no icing. 728 nm along the route, 40 nm north of the line.
as filed, and in English
```
SDY UA /OV SDY/TM 1510/FLUNKN/TP UNKN/SK BASE027 TOP057/IC NEG/ZLC
```
Report
a routine report filed through SDY
Where
over SDY
Time
15:10 UTC
Height
height not given
Aircraft
UNKN
Sky
BASE027 TOP057
Icing
neg/zlc
CL35 at 3,000 ft, 2 nm west, 8:07 am PDT (15:07 UTC): no icing. 798 nm along the route, 2 nm west of the line.
as filed, and in English
```
DIK UA /OV DIK/TM 1507/FL030/TP CL35/SK BASE030/IC NEG
```
Report
a routine report filed through DIK
Where
over DIK
Time
15:07 UTC
Height
at 3,000 ft
Aircraft
CL35
Sky
BASE030
Icing
none
C414 at 8,000 ft, 3 nm southwest, 7:19 am PDT (14:19 UTC): no icing, 7 °C. 818 nm along the route, 3 nm southwest of the line.
as filed, and in English
```
DIK UA /OV DIK090020/TM 1419/FL080/TP C414/SK TOP080/TA 07/IC NEG
```
Report
a routine report filed through DIK
Where
20 nm east (090°) of DIK
Time
14:19 UTC
Height
at 8,000 ft
Aircraft
C414
Sky
TOP080
Temperature
7 °C
Icing
none
C525 at 3,500 ft, 11 nm northeast, 6:43 am PDT (13:43 UTC): a trace of rime icing, 3 °C, remarks: during the descent. 878 nm along the route, 11 nm northeast of the line.
as filed, and in English
```
BIS UA /OV BIS/TM 1343/FL035/TP C525/SK BASES 020 TOPS 055/TA 03/IC TR RIME/RM DURD
```
Report
a routine report filed through BIS
Where
over BIS
Time
13:43 UTC
Height
at 3,500 ft
Aircraft
C525
Sky
bases 2,000 ft tops 5,500 ft
Temperature
3 °C
Icing
tr rime
Remarks
during the descent
PA46 at 7,000 ft, 11 nm northeast, 6:11 am PDT (13:11 UTC): remarks: during the climb. 878 nm along the route, 11 nm northeast of the line.
as filed, and in English
```
BIS UA /OV BIS/TM 1311/FL070/TP PA46/SK TOPS 062/RM DURC
```
Report
a routine report filed through BIS
Where
over BIS
Time
13:11 UTC
Height
at 7,000 ft
Aircraft
PA46
Sky
tops 6,200 ft
Remarks
during the climb

10 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 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 15 forecast points nearest it (SEA, YKM, GEG, GPI, GTF, GGW, MLS, DIK, ABR, AXN, MSP, LSE, GRB, MKG, CLE). 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 7 kt	−3 kt		123 kt	13 h 28 min	1:23 am EDT (05:23 UTC)
5,500 ft	250° at 6 kt	−4 kt	-2 °C	124 kt	13 h 21 min	1:16 am EDT (05:16 UTC)
7,500 ft	250° at 9 kt	−6 kt	6 °C	126 kt	13 h 09 min	1:04 am EDT (05:04 UTC)
9,500 ft	250° at 12 kt	−9 kt	3 °C	129 kt	12 h 50 min	12:45 am EDT (04:45 UTC)
11,500 ft	250° at 13 kt	−10 kt	1 °C	130 kt	12 h 44 min	12:39 am EDT (04:39 UTC)
13,500 ft	250° at 15 kt	−12 kt	-3 °C	132 kt	12 h 33 min	12:28 am EDT (04:28 UTC)
15,500 ft	250° at 16 kt	−13 kt	-7 °C	133 kt	12 h 27 min	12:22 am EDT (04:22 UTC)
17,500 ft	250° at 17 kt	−13 kt	-12 °C	133 kt	12 h 27 min	12:22 am EDT (04:22 UTC)
18,000 ft FL180	250° at 17 kt	−14 kt	-13 °C	134 kt	12 h 21 min	12:16 am EDT (04:16 UTC)
24,000 ft FL240	250° at 22 kt	−18 kt	-25 °C	138 kt	12 h	11:55 pm EDT (03:55 UTC)
30,000 ft FL300	250° at 27 kt	−22 kt	-37 °C	142 kt	11 h 40 min	11:35 pm EDT (03:35 UTC)
34,000 ft FL340	250° at 33 kt	−29 kt	-39 °C	149 kt	11 h 07 min	11:02 pm EDT (03:02 UTC)
39,000 ft FL390	260° at 42 kt	−39 kt	-45 °C	159 kt	10 h 25 min	10:20 pm EDT (02:20 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
SEA	used from 0 nm out; 26 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°
YKM	used from 50 nm out; 63 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°
GEG	used from 100 nm out; 68 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°
GPI	used from 249 nm out; 64 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°
GTF	used from 399 nm out; 20 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°
GGW	used from 549 nm out; 80 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°
MLS	used from 648 nm out; 46 nm from the line		320/9 -2°	270/14 0°	260/22 -1°	220/30 -14°	210/43 -26°	230/53 -34°	230/54 -38°	230/59 -44°
DIK	used from 748 nm out; 22 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°
ABR	used from 898 nm out; 82 nm from the line	020/9	230/5 12°	190/14 11°	200/25 5°	230/37 -11°	230/50 -23°	240/39 -34°	240/49 -38°	240/55 -46°
AXN	used from 1047 nm out; 36 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°
MSP	used from 1147 nm out; 46 nm from the line	140/8	210/22 19°	230/31 13°	240/31 5°	240/29 -9°	250/34 -21°	250/38 -36°	260/46 -38°	270/55 -47°
LSE	used from 1297 nm out; 56 nm from the line	240/16	230/27 20°	250/35 12°	260/28 5°	260/30 -9°	260/37 -21°	260/38 -36°	280/44 -37°	280/52 -47°
GRB	used from 1346 nm out; 59 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°
MKG	used from 1496 nm out; 22 nm from the line	240/27	240/26 15°	270/27 9°	280/27 5°	280/28 -9°	280/32 -22°	270/41 -38°	290/44 -41°	300/60 -48°
CLE	used from 1646 nm out; 107 nm from the line	280/17	270/17 14°	280/22 10°	290/26 4°	290/25 -8°	280/31 -21°	280/35 -36°	280/43 -44°	300/53 -48°

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 3 knots	10+ mi	none	21 ft	7:53 am PDT (14:53 UTC)
EAT Wenatchee, WA	80 nm out, 14 nm south of the line	reported, no category	from the north-northwest (340°) at 5 knots		none	1,248 ft	14:55 UTC
SFF Spokane, WA	199 nm out, 2 nm east of the line, tower	VFR Sky: a broken layer at 6,000 feet, a broken layer at 7,000 feet, overcast at 9,000 feet	from the east (090°) at 6 knots	10+ mi	6,000 ft	1,956 ft	14:53 UTC
GTF Great Falls, MT	439 nm out, 7 nm southeast of the line, tower	low IFR Sky: sky obscured at 200 feet Weather: freezing fog	from the west-northwest (290°) at 4 knots	0.25 mi	200 ft	3,680 ft	15:34 UTC
JDN Jordan, MT	618 nm out, 5 nm east of the line	reported, no category	from the west-northwest (290°) at 8 knots		none	2,667 ft	15:48 UTC
GDV Glendive, MT	708 nm out, 4 nm northeast of the line	IFR Sky: overcast at 600 feet Weather: mist	from the north-northeast (030°) at 7 knots	4 mi	600 ft	2,458 ft	15:12 UTC
BIS Bismarck, ND	878 nm out, 10 nm north of the line, tower	IFR Sky: a broken layer at 700 feet, overcast at 1,600 feet	from the north (010°) at 4 knots	9 mi	700 ft	1,661 ft	15:52 UTC
GHW Glenwood, MN	1117 nm out, 5 nm southwest of the line	VFR Sky: scattered clouds at 1,200 feet, scattered clouds at 17,000 feet	from the east-northeast (070°) at 10 knots	10+ mi	none	1,393 ft	15:35 UTC
EAU Eau Claire, WI	1287 nm out, 5 nm west of the line, tower	VFR	from the south (190°) at 5 knots	10+ mi	none	913 ft	14:56 UTC
ATW Appleton, WI	1416 nm out, 6 nm north of the line, tower	VFR Sky: scattered clouds at 12,000 feet	from the south-southwest (200°) at 11 knots, gusting to 16	10+ mi	none	918 ft	15:45 UTC
FNT Flint, MI	1636 nm out, 11 nm north of the line, tower	VFR	from the south-southwest (210°) at 9 knots	10+ mi	none	782 ft	14:53 UTC
PTK Pontiac, MI	destination	VFR Sky: a broken layer at 20,000 feet	from the southwest (220°) at 4 knots	10+ mi	20,000 ft	980 ft	10:53 am EDT (14:53 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 PTK when you get there the forecast at the estimated arrival, 10:20 pm EDT (02:20 UTC)

Wind from the south-southwest at 7 knots, visibility more than 6 miles, scattered clouds at 9,000 feet, a broken layer at 20,000 feet VFR

The whole forecast for PTK

From Mon 11:00 am EDT (15:00 UTC): wind from the southwest at 9 knots, visibility more than 6 miles, a broken layer at 25,000 feet
From Mon 12:00 pm EDT (16:00 UTC): wind from the southwest at 14 knots, gusting to 24, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 8:00 pm EDT (00:00 UTC): wind from the south-southwest at 7 knots, visibility more than 6 miles, scattered clouds at 9,000 feet, a broken layer at 20,000 feet
From Tue 12:00 am EDT (04:00 UTC): wind from the south-southwest at 4 knots, visibility more than 6 miles, scattered clouds at 6,000 feet, a broken layer at 11,000 feet
30% chance between Tue 1:00 am EDT (05:00 UTC) and 5:00 am EDT (09:00 UTC): visibility 6 miles, light rain showers, a broken layer at 5,000 feet
From Tue 7:00 am EDT (11:00 UTC): wind from the west-southwest at 10 knots, visibility more than 6 miles, scattered clouds at 3,500 feet

The forecast for BFI, the departure

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

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 6 nm from the route, 319 nm along the route · a VIP movement · starts Wednesday 14 October · ZLC
6/8927 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local 15 nm from the route, 329 nm along the route · a VIP movement · starts Wednesday 14 October · ZSE
6/6656 ANOKA, MN, Monday, October 5, 2026 through Monday, October 19, 2026 Local 6 nm from the route, 1197 nm along the route · security · until 19 October · ZMP
6/8992 Monroe, MI, Thursday, October 15, 2026 Local 22 nm from the route, at the destination end · a VIP movement · starts Thursday 15 October · ZOB

Daylight

Sunset at BFI 6:25 pm PDT (01:25 UTC), at PTK 6:56 pm EDT (22:56 UTC) (civil twilight ends 7:24 pm EDT (23:24 UTC)). At 120 knots the arrival at PTK is after sunset there (6:56 pm EDT (22:56 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, Oakland County International.