Plan a flight · Sun 9:44 pm CDT (02:44 UTC)

George Bush Intcntl/Houston Airport to Boeing Fld/King County International IAH → BFI

1,629 nautical miles (1,875 statute miles) northwest on a straight line, true course 318°, about 315° magnetic at the departure end (variation 3E). At 120 knots that is 12 h 50 min at the quickest height in today's winds (4,500 ft, a 7-knot tailwind), arriving about 8:34 am PDT (15:34 UTC). Right now IAH is VFR, wind from the southeast (140°) at 8 knots; BFI is VFR, wind calm. 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 6W: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 10:55 pm CDT (03:55 UTC). Over the route from 600 to 740 nm out.

as issued

WSUS33 KKCI 120155
MKCW WST 120155
CONVECTIVE SIGMET 6W
VALID UNTIL 0355Z
CO NM
FROM 50SSW DEN-30NNE TBE-50SSW CME-50E SJN-20NE DVC-50SSW DEN
AREA TS MOV FROM 23040KT. TOPS TO FL340.

AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 580 to 1080 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). Near the route, 590 nm along the route.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 630 to 1329 nm out.
AIRMET TANGO 1W: 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 710 to 1020 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 710 to 800 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 890 to 1299 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 890 to 1459 nm out.
AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 890 to 950 nm out.
AIRMET SIERRA 2E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Near the route, 950 nm along the route.
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 1060 to 1269 nm out.
AIRMET ZULU 2C: moderate icing up to 16,000 ft. Over the route from 1359 to 1529 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 140 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 IAH.

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

urgent B407 at 10,000 ft, 37 nm northeast, 9:13 pm CDT (02:13 UTC): moderate to severe turbulence. 710 nm along the route, 37 nm northeast of the line.
as filed, and in English
```
COS UUA /OV 10 W COS/TM 0213/FL100/TP B407/TB MDT-SEV
```
Report
an urgent report filed through COS
Where
10 west cos
Time
02:13 UTC
Height
at 10,000 ft
Aircraft
B407
Turbulence
mdt-sev
BE9L at 24,500 ft, 6 nm west, 9:21 pm CDT (02:21 UTC): moderate turbulence, remarks: ZDVWC-41. 690 nm along the route, 6 nm west of the line.
as filed, and in English
```
PUB UA /OV PUB250040/TM 0221/FL245/TP BE9L/TB OCNL MOD/RM ZDVWC-41
```
Report
a routine report filed through PUB
Where
40 nm west (250°) of PUB
Time
02:21 UTC
Height
at 24,500 ft
Aircraft
BE9L
Turbulence
occasional moderate
Remarks
ZDVWC-41
B738 at 18,000 ft, 34 nm northeast, 9:02 pm CDT (02:02 UTC): moderate chop turbulence from 18,000 ft to 25,000 ft, remarks: during the climb ZDVWC-41. 730 nm along the route, 34 nm northeast of the line.
as filed, and in English
```
COS UA /OV BRK270030/TM 0202/FL180/TP B738/TB MOD CHOP 180-250/RM DURC ZDVWC-41
```
Report
a routine report filed through COS
Where
30 nm west (270°) of BRK
Time
02:02 UTC
Height
at 18,000 ft
Aircraft
B738
Turbulence
moderate chop from 18,000 ft to 25,000 ft
Remarks
during the climb ZDVWC-41
C650 at 40,000 ft, 5 nm north, 6:48 pm CDT (23:48 UTC): moderate turbulence, remarks: ZDVWC-03. 800 nm along the route, 5 nm north of the line.
as filed, and in English
```
ASE UA /OV DBL/TM 2348/FL400/TP C650/TB MOD /RM ZDVWC-03
```
Report
a routine report filed through ASE
Where
over DBL
Time
23:48 UTC
Height
at 40,000 ft
Aircraft
C650
Turbulence
moderate
Remarks
ZDVWC-03
E75L at 28,000 ft, 22 nm northeast, 8:31 pm CDT (01:31 UTC): moderate turbulence, remarks: ZDVWC-03. 840 nm along the route, 22 nm northeast of the line.
as filed, and in English
```
EEO UA /OV EKR085036/TM 0131/FL280/TP E75L/TB MOD/RM ZDVWC-03
```
Report
a routine report filed through EEO
Where
36 nm east (085°) of EKR
Time
01:31 UTC
Height
at 28,000 ft
Aircraft
E75L
Turbulence
moderate
Remarks
ZDVWC-03
B39M at 27,000 ft, 2 nm south, 7:42 pm CDT (00:42 UTC): light chop turbulence, remarks: zhu. At the departure end, 2 nm south of the line.
as filed, and in English
```
IAH UA /OV IH340035/TM 0042/FL270/TP B39M/TB LT CHOP DURC/RM ZHU
```
Report
a routine report filed through IAH
Where
IH340035
Time
00:42 UTC
Height
at 27,000 ft
Aircraft
B39M
Turbulence
lt chop during the climb
Remarks
zhu
A320 at 35,000 ft, 19 nm southwest, 7:43 pm CDT (00:43 UTC): light chop turbulence, remarks: ZFW47. 390 nm along the route, 19 nm southwest of the line.
as filed, and in English
```
CDS UA /OV CDS270030/TM 0043/FL350/TP A320/TB LGT CHOP/RM ZFW47
```
Report
a routine report filed through CDS
Where
30 nm west (270°) of CDS
Time
00:43 UTC
Height
at 35,000 ft
Aircraft
A320
Turbulence
light chop
Remarks
ZFW47
A21N at 31,000 ft, 29 nm northeast, 7:24 pm CDT (00:24 UTC): remarks: mountain wave +/-10-20KT ZDVWC-29. 670 nm along the route, 29 nm northeast of the line.
as filed, and in English
```
PUB UA /OV PUB/TM 0024/FL310/TP A21N/RM MTN WAVE +/-10-20KT ZDVWC-29
```
Report
a routine report filed through PUB
Where
over PUB
Time
00:24 UTC
Height
at 31,000 ft
Aircraft
A21N
Remarks
mountain wave +/-10-20KT ZDVWC-29
CL35 at 43,000 ft, 6 nm west, 7:21 pm CDT (00:21 UTC): remarks: mtw +/-300FT zdvwc. 690 nm along the route, 6 nm west of the line.
as filed, and in English
```
PUB UA /OV PUB250040/TM 0021/FL430/TP CL35/RM MTW +/-300FT ZDVWC
```
Report
a routine report filed through PUB
Where
40 nm west (250°) of PUB
Time
00:21 UTC
Height
at 43,000 ft
Aircraft
CL35
Remarks
mtw +/-300FT zdvwc
B38M at 36,000 ft, 27 nm southwest, 9:22 pm CDT (02:22 UTC): light turbulence, remarks: mtw +/-200FT ZDVWC-30. 700 nm along the route, 27 nm southwest of the line.
as filed, and in English
```
ALS UA /OV ALS360035/TM 0222/FL360/TP B38M/TB LGT/RM MTW +/-200FT ZDVWC-30
```
Report
a routine report filed through ALS
Where
35 nm north (360°) of ALS
Time
02:22 UTC
Height
at 36,000 ft
Aircraft
B38M
Turbulence
light
Remarks
mtw +/-200FT ZDVWC-30
BE9L at 20,000 ft, 39 nm southwest, 7:34 pm CDT (00:34 UTC): light rime icing, -9 °C, remarks: ZDVWC-41. 710 nm along the route, 39 nm southwest of the line.
as filed, and in English
```
ALS UA /OV ALS330035/TM 0034/FL200/TP BE9L/TA M09/IC LGT RIME/RM ZDVWC-41
```
Report
a routine report filed through ALS
Where
35 nm northwest (330°) of ALS
Time
00:34 UTC
Height
at 20,000 ft
Aircraft
BE9L
Temperature
−9 °C
Icing
light rime
Remarks
ZDVWC-41
B737 at 25,000 ft, 38 nm northeast, 7:29 pm CDT (00:29 UTC): light rime icing, 0 °C, remarks: during the climb ZDVWC-29. 710 nm along the route, 38 nm northeast of the line.
as filed, and in English
```
COS UA /OV BRK242015/TM 0029/FL250/TP B737/SK TOP280/TA 00/IC LGT RIME/RM DURC ZDVWC-29
```
Report
a routine report filed through COS
Where
15 nm southwest (242°) of BRK
Time
00:29 UTC
Height
at 25,000 ft
Aircraft
B737
Sky
TOP280
Temperature
0 °C
Icing
light rime
Remarks
during the climb ZDVWC-29
E55P at 38,000 ft, 45 nm northeast, 8:23 pm CDT (01:23 UTC): light chop turbulence, remarks: ZDVWC-05. 730 nm along the route, 45 nm northeast of the line.
as filed, and in English
```
DEN UA /OV FQF200040/TM 0123/FL380/TP E55P/TB LGT CHOP/RM ZDVWC-05
```
Report
a routine report filed through DEN
Where
40 nm south (200°) of FQF
Time
01:23 UTC
Height
at 38,000 ft
Aircraft
E55P
Turbulence
light chop
Remarks
ZDVWC-05
SW4 at 20,000 ft, 39 nm southwest, 8:00 pm CDT (01:00 UTC): light rime icing, 0 °C, remarks: ZDVWC-12. 770 nm along the route, 39 nm southwest of the line.
as filed, and in English
```
GUC UA /OV GUC/TM 0100/FL200/TP SW4/TA 00/IC LGT RIME/RM ZDVWC-12
```
Report
a routine report filed through GUC
Where
over GUC
Time
01:00 UTC
Height
at 20,000 ft
Aircraft
SW4
Temperature
0 °C
Icing
light rime
Remarks
ZDVWC-12

12 more routine reports are on the map.

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 westbound cruising heights for this course (VFR: even thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 14 forecast points nearest it (CLL, DAL, ABI, SPS, AMA, TCC, PUB, GJT, RKS, PIH, BOI, LWS, YKM, SEA). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
4,500 ft	200° at 14 kt	−7 kt	6 °C	127 kt	12 h 50 min	8:34 am PDT (15:34 UTC)
6,500 ft	210° at 12 kt	−5 kt	7 °C	125 kt	13 h 02 min	8:46 am PDT (15:46 UTC)
8,500 ft	220° at 17 kt	−2 kt	5 °C	122 kt	13 h 21 min	9:05 am PDT (16:05 UTC)
10,500 ft	230° at 17 kt	+1 kt	3 °C	119 kt	13 h 41 min	9:25 am PDT (16:25 UTC)
12,500 ft	230° at 19 kt	+3 kt	0 °C	117 kt	13 h 55 min	9:39 am PDT (16:39 UTC)
14,500 ft	230° at 21 kt	+1 kt	-4 °C	119 kt	13 h 41 min	9:25 am PDT (16:25 UTC)
16,500 ft	220° at 23 kt	0	-8 °C	120 kt	13 h 34 min	9:18 am PDT (16:18 UTC)
18,000 ft FL180	220° at 25 kt	−1 kt	-11 °C	121 kt	13 h 28 min	9:12 am PDT (16:12 UTC)
24,000 ft FL240	230° at 31 kt	+2 kt	-22 °C	118 kt	13 h 48 min	9:32 am PDT (16:32 UTC)
30,000 ft FL300	240° at 40 kt	+11 kt	-30 °C	109 kt	14 h 57 min	10:41 am PDT (17:41 UTC)
34,000 ft FL340	240° at 41 kt	+15 kt	-36 °C	105 kt	15 h 31 min	11:15 am PDT (18:15 UTC)
39,000 ft FL390	250° at 37 kt	+16 kt	-45 °C	104 kt	15 h 40 min	11:24 am PDT (18:24 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
CLL	used from 0 nm out; 40 nm from the line	170/22	170/26 18°	200/15 14°	240/13 8°	240/15 -5°	260/17 -13°	290/27 -29°	290/22 -40°	320/30 -51°
DAL	used from 150 nm out; 59 nm from the line	190/29	220/23 17°	220/17 13°	250/18 8°	230/18 -5°	240/18 -15°	270/34 -29°	280/33 -39°	300/36 -51°
ABI	used from 200 nm out; 71 nm from the line		200/31 17°	210/21 15°	240/15 9°	250/14 -4°	250/24 -14°	250/36 -28°	270/35 -38°	290/41 -50°
SPS	used from 250 nm out; 48 nm from the line	200/39	220/28 17°	230/27 12°	240/15 9°	250/15 -4°	250/24 -15°	260/45 -28°	270/43 -39°	280/45 -51°
AMA	used from 350 nm out; 76 nm from the line		210/38	230/29 14°	240/29 7°	220/27 -5°	240/37 -18°	240/66 -28°	250/59 -37°	260/47 -49°
TCC	used from 550 nm out; 100 nm from the line		210/42	230/33 14°	230/32 6°	220/35 -6°	230/49 -19°	240/72 -27°	250/62 -36°	250/52 -48°
PUB	used from 600 nm out; 56 nm from the line			230/25 13°	230/32 6°	220/44 -8°	230/49 -21°	240/70 -28°	240/67 -34°	240/58 -46°
GJT	used from 750 nm out; 96 nm from the line			210/43 7°	230/45 1°	220/49 -12°	220/62 -22°	220/59 -28°	230/60 -33°	220/55 -45°
RKS	used from 900 nm out; 53 nm from the line			200/41	220/44 1°	220/35 -11°	220/46 -24°	210/53 -27°	220/62 -35°	230/61 -44°
PIH	used from 1050 nm out; 60 nm from the line		L/V	240/13 1°	240/15 -3°	210/42 -15°	200/70 -25°	220/74 -29°	220/71 -36°	220/62 -43°
BOI	used from 1200 nm out; 87 nm from the line		300/7 2°	280/5 -4°	210/16 -9°	210/60 -20°	210/75 -29°	210/63 -32°	220/64 -32°	220/54 -39°
LWS	used from 1349 nm out; 68 nm from the line	070/10	080/12 -2°	030/12 -6°	080/7 -10°	170/34 -21°	160/46 -32°	200/33 -35°	220/22 -35°	230/18 -38°
YKM	used from 1449 nm out; 65 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°
SEA	used from 1599 nm out; 14 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°

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
IAH Houston, TX	departure	VFR Sky: scattered clouds at 25,000 feet	from the southeast (140°) at 8 knots	10+ mi	none	95 ft	8:53 pm CDT (01:53 UTC)
CNW Waco, TX	130 nm out, 4 nm north of the line, tower	VFR	from the south-southeast (150°) at 8 knots	10+ mi	none	470 ft	02:35 UTC
GDJ Granbury, TX	190 nm out, 8 nm north of the line	VFR	from the south (170°) at 7 knots	10+ mi	none	835 ft	02:35 UTC
AMA Amarillo, TX	450 nm out, 14 nm southwest of the line, tower	VFR	from the south (170°) at 19 knots, gusting to 27	10+ mi	none	3,606 ft	01:53 UTC
DUX Dumas, TX	490 nm out, 4 nm east of the line	VFR	from the south (180°) at 13 knots, gusting to 19	10+ mi	none	3,706 ft	02:35 UTC
ASE Aspen, CO	790 nm out, 7 nm west of the line, tower	VFR Sky: scattered clouds at 6,000 feet, overcast at 7,500 feet Weather: light rain	calm	10+ mi	7,500 ft	7,837 ft	01:53 UTC
EEO Meeker, CO	860 nm out, 2 nm northwest of the line	VFR	variable at 6 knots	10+ mi	none	6,415 ft	01:53 UTC
PIH Pocatello, ID	1130 nm out, 5 nm northwest of the line, tower	VFR Sky: scattered clouds at 1,200 feet, a broken layer at 7,500 feet, overcast at 8,500 feet Weather: light rain	from the west-southwest (250°) at 12 knots	10+ mi	7,500 ft	4,451 ft	01:53 UTC
SUN Hailey, ID	1219 nm out, 16 nm south of the line, tower	marginal VFR Sky: scattered clouds at 500 feet, a broken layer at 1,000 feet, overcast at 1,500 feet Weather: light rain	from the east-southeast (120°) at 8 knots	4 mi	1,000 ft	5,319 ft	02:38 UTC
ALW Walla Walla, WA	1439 nm out, 15 nm north of the line, tower	VFR Sky: scattered clouds at 5,500 feet, overcast at 8,000 feet	from the south-southwest (210°) at 4 knots	10+ mi	8,000 ft	1,194 ft	01:53 UTC
PSC Pasco, WA	1479 nm out, 4 nm northeast of the line, tower	VFR Sky: overcast at 9,000 feet	from the north (010°) at 7 knots	10+ mi	9,000 ft	410 ft	01:53 UTC
BFI Seattle, WA	destination	VFR Sky: a few clouds at 6,000 feet	calm	10+ mi	none	21 ft	6:53 pm PDT (01:53 UTC)

The highest airport on this list sits at 7,837 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At BFI when you get there the forecast at the estimated arrival, 8:34 am PDT (15:34 UTC)

Wind light and variable, visibility more than 6 miles, patches of fog, clear skies VFR

The whole forecast for BFI

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

The forecast for IAH, the departure

From Sun 10:00 pm CDT (03:00 UTC): wind from the south-southeast at 7 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 4:00 am CDT (09:00 UTC): wind from the east-southeast at 4 knots, visibility more than 6 miles, scattered clouds at 2,500 feet, scattered clouds at 25,000 feet
From Mon 12:00 pm CDT (17:00 UTC): wind from the southeast at 11 knots, visibility more than 6 miles, scattered clouds at 3,500 feet, a broken layer at 25,000 feet
30% chance between Mon 1:00 pm CDT (18:00 UTC) and 5:00 pm CDT (22:00 UTC): light rain showers

Temporary flight restrictions on the line or within 25 nm of it

6/0543 MCGREGOR, TX 22 nm from the route, 140 nm along the route · security · ZFW
6/8784 LAKE GEORGE, CO, Sunday, October 11, 2026 through Tuesday, October 13, 2026 UTC 24 nm from the route, 730 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 13 October · ZDV

Daylight

Sunset at IAH 6:54 pm CDT (23:54 UTC), at BFI 6:27 pm PDT (01:27 UTC) (civil twilight ends 6:58 pm PDT (01:58 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 southern Plains · loop National Weather Service

Radar now, the southern Rockies · loop National Weather Service

Radar now, the Pacific Northwest · 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: George Bush Intcntl/Houston Airport, Boeing Fld/King County International.