Plan a flight · Sun 7:48 pm CDT (00:48 UTC)

William P Hobby Airport to Boeing Fld/King County International HOU → BFI

1,647 nautical miles (1,895 statute miles) northwest on a straight line, true course 318°, about 315° magnetic at the departure end (variation 3E). At 120 knots that is 13 h 11 min at the quickest height in today's winds (4,500 ft, a 5-knot tailwind), arriving about 6:59 am PDT (13:59 UTC), after sunset at the destination. Right now HOU is VFR, wind from the south-southeast (150°) at 8 knots; BFI is VFR, wind variable at 6 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 W68W: thunderstorms (a convective SIGMET) up to 36,000 ft, moving from the southwest at 40 knots, until 8:55 pm CDT (01:55 UTC). Over the route from 639 to 908 nm out.

as issued

WSUS33 KKCI 112355
MKCW WST 112355
CONVECTIVE SIGMET 68W
VALID UNTIL 0155Z
CO NM AZ UT
FROM 30W CHE-20NNW TBE-60SE ABQ-40N SJN-30SW MTU-30W CHE
AREA TS MOV FROM 23040KT. TOPS TO FL360.

SIGMET W71W: thunderstorms (a convective SIGMET) up to 27,000 ft, moving from the south at 40 knots, until 8:55 pm CDT (01:55 UTC). Over the route from 1058 to 1158 nm out.

as issued

WSUS33 KKCI 112355
MKCW WST 112355
CONVECTIVE SIGMET 71W
VALID UNTIL 0155Z
WY UT ID
FROM 40S DBS-40WNW BPI-30WSW MTU-30SSW DTA-30SE TWF-40S DBS
AREA EMBD TS MOV FROM 20040KT. TOPS TO FL270.

AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 619 to 1128 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 709 to 1377 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 778 to 1477 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 798 to 1098 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 888 to 938 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 968 to 1277 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 1098 to 1287 nm out.
AIRMET ZULU 2C: moderate icing up to 14,000 ft. Over the route from 1347 to 1527 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 25,000 ft to 39,000 ft. Over the last 0 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 HOU.

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

CRJ2 at 19,000 ft, 48 nm northeast, 5:02 pm CDT (22:02 UTC): moderate chop turbulence, remarks: during the climb from KDEN from 12,000 ft to 19,000 ft ZDVWC-41. 739 nm along the route, 48 nm northeast of the line.
as filed, and in English
```
COS UA /OV BRK262015/TM 2202/FL190/TP CRJ2/TB MOD CHOP/RM DURC FROM KDEN 120-190 ZDVWC-41
```
Report
a routine report filed through COS
Where
15 nm west (262°) of BRK
Time
22:02 UTC
Height
at 19,000 ft
Aircraft
CRJ2
Turbulence
moderate chop
Remarks
during the climb from KDEN from 12,000 ft to 19,000 ft ZDVWC-41
UAL2238 at 38,000 ft, 48 nm southwest, 6:44 pm CDT (23:44 UTC): moderate turbulence, wind 244° at 64 knots. 768 nm along the route, 48 nm southwest of the line.
as filed, and in English
```
ARP UAL2238 3807N 10649W 2344 F380 244/064KT TB CONT MOD TURB IC
```
Report
a routine report filed through ARP
C680A at 16,000 ft, 3 nm northwest, 5:59 pm CDT (22:59 UTC): moderate turbulence, scattered clouds above 16,000 ft, remarks: during the descent. 808 nm along the route, 3 nm northwest of the line.
as filed, and in English
```
ASE UA /OV HAERI/TM 2259/FL160/TP C680A/SK SCT160/TB CONS MOD/RM DURD
```
Report
a routine report filed through ASE
Where
haeri
Time
22:59 UTC
Height
at 16,000 ft
Aircraft
C680A
Sky
scattered clouds from 16,000 ft
Turbulence
continuous moderate
Remarks
during the descent
C650 at 40,000 ft, 9 nm northeast, 6:48 pm CDT (23:48 UTC): moderate turbulence, remarks: ZDVWC-03. 818 nm along the route, 9 nm northeast 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
C680 at 18,000 ft, 19 nm southwest, 5:35 pm CDT (22:35 UTC): moderate turbulence, remarks: from 18,000 ft to 10,000 ft. 818 nm along the route, 19 nm southwest of the line.
as filed, and in English
```
ASE UA /OV ASE230020/TM 2235/FL180/TP C680/TB MOD/RM 180-100
```
Report
a routine report filed through ASE
Where
20 nm southwest (230°) of ASE
Time
22:35 UTC
Height
at 18,000 ft
Aircraft
C680
Turbulence
moderate
Remarks
from 18,000 ft to 10,000 ft
C700 at 16,000 ft, 20 nm northeast, 4:55 pm CDT (21:55 UTC): moderate turbulence. 818 nm along the route, 20 nm northeast of the line.
as filed, and in English
```
ASE UA /OV WERNR/TM 2155/FL160/TP C700/TB MOD
```
Report
a routine report filed through ASE
Where
wernr
Time
21:55 UTC
Height
at 16,000 ft
Aircraft
C700
Turbulence
moderate
A21N at 33,000 ft, 45 nm northeast, 5:35 pm CDT (22:35 UTC): moderate turbulence, remarks: mountain wave +25-30KTS. 878 nm along the route, 45 nm northeast of the line.
as filed, and in English
```
HDN UA /OV CHE/TM 2235/FL330/TP A21N/TB MOD/RM MTN WAVE +25-30KTS
```
Report
a routine report filed through HDN
Where
over CHE
Time
22:35 UTC
Height
at 33,000 ft
Aircraft
A21N
Turbulence
moderate
Remarks
mountain wave +25-30KTS
B39M at 27,000 ft, 10 nm east, 7:42 pm CDT (00:42 UTC): light chop turbulence, remarks: zhu. At the departure end, 10 nm east 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 24,000 ft, 10 nm east, 5:07 pm CDT (22:07 UTC): light chop turbulence, remarks: during the climb zhu. At the departure end, 10 nm east of the line.
as filed, and in English
```
IAH UA /OV IAH/TM 2207/FL240/TP A320/TB OCNL LGT CHOP /RM DURC. ZHU
```
Report
a routine report filed through IAH
Where
over IAH
Time
22:07 UTC
Height
at 24,000 ft
Aircraft
A320
Turbulence
occasional light chop
Remarks
during the climb zhu
A320 at 35,000 ft, 11 nm southwest, 7:43 pm CDT (00:43 UTC): light chop turbulence, remarks: ZFW47. 409 nm along the route, 11 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, 36 nm northeast, 7:24 pm CDT (00:24 UTC): remarks: mountain wave +/-10-20KT ZDVWC-29. 689 nm along the route, 36 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, 4 nm north, 7:21 pm CDT (00:21 UTC): remarks: mtw +/-300FT zdvwc. 709 nm along the route, 4 nm north 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
E145 at 7,400 ft, 49 nm southwest, 7:15 pm CDT (00:15 UTC): remarks: base reported below minimums 1/2 miles visibility ZDVWC-41. 709 nm along the route, 49 nm southwest of the line.
as filed, and in English
```
ALS UA /OV KALS/TM 0015/FL074/TP E145/RM BASE REPORTED BELOW MINIMUMS 1/2 SM VIS ZDVWC-41
```
Report
a routine report filed through ALS
Where
over KALS
Time
00:15 UTC
Height
at 7,400 ft
Aircraft
E145
Remarks
base reported below minimums 1/2 miles visibility ZDVWC-41
BE9L at 20,000 ft, 33 nm southwest, 7:34 pm CDT (00:34 UTC): light rime icing, -9 °C, remarks: ZDVWC-41. 729 nm along the route, 33 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

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 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 17 forecast points nearest it (HOU, CLL, DAL, ABI, SPS, LBB, AMA, TCC, PUB, ALS, 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	190° at 8 kt	−5 kt	12 °C	125 kt	13 h 11 min	6:59 am PDT (13:59 UTC)
6,500 ft	200° at 8 kt	−4 kt	8 °C	124 kt	13 h 17 min	7:05 am PDT (14:05 UTC)
8,500 ft	210° at 14 kt	−4 kt	7 °C	124 kt	13 h 17 min	7:05 am PDT (14:05 UTC)
10,500 ft	210° at 18 kt	−3 kt	4 °C	123 kt	13 h 23 min	7:11 am PDT (14:11 UTC)
12,500 ft	220° at 22 kt	−3 kt	0 °C	123 kt	13 h 23 min	7:11 am PDT (14:11 UTC)
14,500 ft	220° at 24 kt	−2 kt	-4 °C	122 kt	13 h 30 min	7:18 am PDT (14:18 UTC)
16,500 ft	220° at 27 kt	−2 kt	-8 °C	122 kt	13 h 30 min	7:18 am PDT (14:18 UTC)
18,000 ft FL180	220° at 29 kt	−1 kt	-11 °C	121 kt	13 h 37 min	7:25 am PDT (14:25 UTC)
24,000 ft FL240	220° at 31 kt	+1 kt	-21 °C	119 kt	13 h 50 min	7:38 am PDT (14:38 UTC)
30,000 ft FL300	230° at 39 kt	+6 kt	-31 °C	114 kt	14 h 27 min	8:15 am PDT (15:15 UTC)
34,000 ft FL340	240° at 45 kt	+15 kt	-37 °C	105 kt	15 h 41 min	9:29 am PDT (16:29 UTC)
39,000 ft FL390	250° at 44 kt	+20 kt	-46 °C	100 kt	16 h 28 min	10:16 am PDT (17:16 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
HOU	used from 0 nm out; 25 nm from the line	160/18	160/14 17°	180/19 12°	190/11 8°	260/12 -4°	260/14 -13°	310/26 -30°	310/30 -40°	320/21 -52°
CLL	used from 50 nm out; 6 nm from the line	160/18	190/18 16°	200/19 12°	220/14 7°	260/18 -5°	250/20 -13°	290/29 -29°	290/31 -40°	300/22 -53°
DAL	used from 150 nm out; 73 nm from the line	180/21	190/24 15°	230/20 12°	220/23 8°	240/22 -5°	230/18 -15°	280/33 -29°	280/36 -39°	300/33 -52°
ABI	used from 200 nm out; 74 nm from the line		180/26 17°	220/18 12°	230/25 8°	230/28 -5°	240/29 -14°	250/35 -28°	270/37 -39°	280/37 -51°
SPS	used from 299 nm out; 60 nm from the line	180/26	200/25 16°	220/19 13°	220/20 9°	230/26 -5°	230/34 -15°	260/37 -28°	270/42 -39°	280/40 -51°
LBB	used from 349 nm out; 83 nm from the line		180/26 20°	210/21 13°	230/21 7°	250/25 -5°	250/34 -16°	250/52 -28°	260/47 -38°	260/49 -50°
AMA	used from 399 nm out; 43 nm from the line		190/28	220/26 14°	230/27 7°	250/24 -6°	250/32 -16°	240/51 -28°	250/52 -38°	250/51 -50°
TCC	used from 549 nm out; 84 nm from the line		200/26	200/28 14°	220/25 7°	230/28 -7°	240/41 -19°	240/62 -28°	250/61 -37°	250/49 -49°
PUB	used from 599 nm out; 75 nm from the line			210/24 16°	210/28 8°	230/43 -8°	240/42 -21°	240/77 -30°	240/72 -36°	250/51 -47°
ALS	used from 748 nm out; 84 nm from the line				210/32 5°	230/48 -8°	230/49 -20°	230/78 -30°	240/74 -36°	240/61 -47°
GJT	used from 798 nm out; 70 nm from the line			210/40 11°	210/46 3°	210/61 -10°	210/68 -22°	220/57 -29°	230/59 -36°	240/66 -46°
RKS	used from 898 nm out; 71 nm from the line			190/43	210/65 3°	210/57 -9°	210/56 -21°	210/47 -33°	230/63 -37°	240/77 -46°
PIH	used from 1048 nm out; 79 nm from the line		270/10	270/13 1°	210/16 -2°	200/56 -11°	200/51 -23°	200/68 -33°	220/77 -37°	230/73 -44°
BOI	used from 1247 nm out; 66 nm from the line		330/14 4°	230/5 -2°	220/20 -7°	210/37 -20°	200/59 -26°	200/67 -34°	210/73 -35°	220/62 -41°
LWS	used from 1347 nm out; 81 nm from the line	010/5	050/14 -2°	040/12 -6°	160/7 -10°	190/30 -22°	200/54 -27°	200/48 -35°	210/40 -37°	230/32 -41°
YKM	used from 1497 nm out; 35 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°
SEA	used from 1597 nm out; 23 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°

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
HOU Houston, TX	departure	VFR Sky: scattered clouds at 25,000 feet	from the south-southeast (150°) at 8 knots	10+ mi	none	46 ft	6:53 pm CDT (23:53 UTC)
CLL College Station, TX	80 nm out, 4 nm southwest of the line, tower	VFR	from the south-southeast (150°) at 7 knots	10+ mi	none	320 ft	23:53 UTC
SEP Stephenville, TX	220 nm out, 8 nm south of the line	VFR Sky: scattered clouds at 11,000 feet	from the south (170°) at 5 knots	10+ mi	none	1,321 ft	00:35 UTC
AMA Amarillo, TX	469 nm out, 7 nm southwest of the line, tower	VFR	from the south (180°) at 19 knots, gusting to 25	10+ mi	none	3,606 ft	23:53 UTC
DHT Dalhart, TX	529 nm out, 1 nm west of the line	VFR	from the south-southwest (200°) at 15 knots, gusting to 24	10+ mi	none	3,991 ft	23:53 UTC
ASE Aspen, CO	808 nm out, 3 nm northwest of the line, tower	VFR Sky: a few clouds at 9,500 feet	from the north-northwest (330°) at 3 knots	10+ mi	none	7,837 ft	23:53 UTC
EGE Eagle, CO	828 nm out, 17 nm northeast of the line, tower	VFR	from the west (280°) at 8 knots	10+ mi	none	6,547 ft	23:56 UTC
PIH Pocatello, ID	1148 nm out, 6 nm north of the line, tower	IFR Sky: a broken layer at 700 feet, overcast at 1,300 feet Weather: light rain	from the southwest (230°) at 15 knots	7 mi	700 ft	4,451 ft	23:53 UTC
SUN Hailey, ID	1238 nm out, 14 nm south of the line, tower	marginal VFR Sky: scattered clouds at 300 feet, a broken layer at 1,300 feet, overcast at 2,200 feet Weather: light rain	from the east-southeast (120°) at 5 knots	7 mi	1,300 ft	5,319 ft	23:47 UTC
ALW Walla Walla, WA	1457 nm out, 16 nm north of the line, tower	VFR Sky: overcast at 4,900 feet	calm	10+ mi	4,900 ft	1,194 ft	23:53 UTC
PSC Pasco, WA	1497 nm out, 5 nm northeast of the line, tower	VFR Sky: a few clouds at 7,000 feet	from the northeast (040°) at 11 knots	10+ mi	none	410 ft	23:53 UTC
BFI Seattle, WA	destination	VFR	variable at 6 knots	10+ mi	none	21 ft	4:53 pm PDT (23:53 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, 6:59 am PDT (13:59 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 HOU, the departure

From Sun 7:00 pm CDT (00:00 UTC): wind from the southeast at 12 knots, visibility more than 6 miles, a few clouds at 25,000 feet
From Sun 8:00 pm CDT (01:00 UTC): wind from the 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 5 knots, visibility more than 6 miles, scattered clouds at 2,500 feet, scattered clouds at 25,000 feet
From Mon 11:00 am CDT (16:00 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 11:00 am CDT (16:00 UTC) and 1:00 pm CDT (18:00 UTC): light rain showers
From Mon 5:00 pm CDT (22:00 UTC): wind from the southeast at 13 knots, visibility more than 6 miles, overcast at 5,000 feet

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

6/0543 MCGREGOR, TX 12 nm from the route, 150 nm along the route · security · ZFW

Daylight

Sunset at HOU 6:55 pm CDT (23:55 UTC), at BFI 6:27 pm PDT (01:27 UTC) (civil twilight ends 6:58 pm PDT (01:58 UTC)). At 120 knots the arrival at BFI is before sunrise there (7:23 am PDT (14:23 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: William P Hobby Airport, Boeing Fld/King County International.