Plan a flight · Sun 7:23 pm PDT (02:23 UTC)

Boeing Fld/King County International to Lakeland Linder International BFI → LAL

2,208 nautical miles (2,541 statute miles) east on a straight line, true course 108°, about 093° magnetic at the departure end (variation 15E). At 120 knots that is 14 h 55 min at the quickest height in today's winds (39,000 ft, a 28-knot tailwind), arriving about 1:18 pm EDT (17:18 UTC). Right now BFI is VFR, wind calm; LAL is VFR, wind from the west-northwest (300°) at 5 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 8W: thunderstorms (a convective SIGMET) up to 35,000 ft, moving from the southwest at 40 knots, until 8:55 pm PDT (03:55 UTC). Over the route from 639 to 829 nm out.

as issued

WSUS33 KKCI 120155
MKCW WST 120155
CONVECTIVE SIGMET 8W
VALID UNTIL 0355Z
CO MT WY
FROM 40N SHR-60WNW RAP-20ENE CYS-30SW CYS-10NW BOY-40N SHR
AREA TS MOV FROM 22040KT. TOPS TO FL350.

AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 140 nm of the route.
AIRMET ZULU 2C: moderate icing up to 16,000 ft. Over the route from 100 to 420 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 190 to 689 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 280 to 909 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 330 to 649 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 440 to 689 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 500 to 869 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 559 to 779 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 1009 to 1289 nm out.
AIRMET TANGO 6W: moderate turbulence above 18,000 ft from 28,000 ft to 40,000 ft. Over the route from 1888 to 2058 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

urgent CRJ2 at 7,000 ft, 12 nm northeast, 6:04 pm PDT (01:04 UTC): moderate turbulence, remarks: low-level wind shear dept runway 03 gain/loss unknown. 719 nm along the route, 12 nm northeast of the line.
as filed, and in English
```
CPR UUA /OV CPR035002/TM 0104/FL070/TP CRJ2/TB CONT MOD TURB/RM LLWS DEPT RY03 GAIN/LOSS UNKN
```
Report
an urgent report filed through CPR
Where
2 nm northeast (035°) of CPR
Time
01:04 UTC
Height
at 7,000 ft
Aircraft
CRJ2
Turbulence
continuous moderate turbulence
Remarks
low-level wind shear dept runway 03 gain/loss unknown
B738 at 33,000 ft, 10 nm south, 4:57 pm PDT (23:57 UTC): moderate chop turbulence from 31,000 ft to 33,000 ft. 470 nm along the route, 10 nm south of the line.
as filed, and in English
```
IDA UA /OV DBS015030/TM 2357/FL330/TP B738/TB MOD CHOP 310-330 /ZLC
```
Report
a routine report filed through IDA
Where
30 nm north (015°) of DBS
Time
23:57 UTC
Height
at 33,000 ft
Aircraft
B738
Turbulence
moderate chop from 31,000 ft to 33,000 ft zlc
S22T at 15,000 ft, 2 nm northwest, 6:47 pm PDT (01:47 UTC): moderate rime icing above 15,000 ft, -5 °C. 549 nm along the route, 2 nm northwest of the line.
as filed, and in English
```
JAC UA /OV DNW010020/TM 0147/FL150/TP S22T/TA M05/IC MOD RIME 150 /ZLC
```
Report
a routine report filed through JAC
Where
20 nm north (010°) of DNW
Time
01:47 UTC
Height
at 15,000 ft
Aircraft
S22T
Temperature
−5 °C
Icing
moderate rime at 15,000 ft zlc
UAL1340 at 40,000 ft, 28 nm northeast, 5:18 pm PDT (00:18 UTC): moderate chop turbulence, wind 244° at 70 knots. 1009 nm along the route, 28 nm northeast of the line.
as filed, and in English
```
ARP UAL1340 4046N 10049W 0018 F400 244/070KT TB OCNL MOD CHOP IC
```
Report
a routine report filed through ARP
A321 at 13,500 ft, 29 nm south, 6:54 pm PDT (01:54 UTC): remarks: zse. At the departure end, 29 nm south of the line.
as filed, and in English
```
SEA UA /OV SEA120045/TM 0154/FL135/TP A321/SK TOP130/RM ZSE
```
Report
a routine report filed through SEA
Where
45 nm southeast (120°) of SEA
Time
01:54 UTC
Height
at 13,500 ft
Aircraft
A321
Sky
TOP130
Remarks
zse
SB20 at 16,000 ft, 32 nm north, 6:52 pm PDT (01:52 UTC): remarks: zse. At the departure end, 32 nm north of the line.
as filed, and in English
```
PAE UA /OV PAE075045/TM 0152/FL160/TP SB20/SK TOP120/RM ZSE
```
Report
a routine report filed through PAE
Where
45 nm east (075°) of PAE
Time
01:52 UTC
Height
at 16,000 ft
Aircraft
SB20
Sky
TOP120
Remarks
zse
PC12 at 15,000 ft, 29 nm south, 5:42 pm PDT (00:42 UTC): remarks: zse. At the departure end, 29 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, 29 nm south, 5:42 pm PDT (00:42 UTC): remarks: zse. At the departure end, 29 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
C337 at 12,000 ft, 49 nm south, 6:18 pm PDT (01:18 UTC): light rime icing, -12 °C, remarks: zse. 100 nm along the route, 49 nm south of the line.
as filed, and in English
```
YKM UA /OV YKM155020/TM 0118/FL120/TP C337/TA M12/IC LGT RIME/RM ZSE
```
Report
a routine report filed through YKM
Where
20 nm southeast (155°) of YKM
Time
01:18 UTC
Height
at 12,000 ft
Aircraft
C337
Temperature
−12 °C
Icing
light rime
Remarks
zse
PC12 at 13,500 ft, 6 nm southwest, 6:08 pm PDT (01:08 UTC): no turbulence, a trace of icing, overcast from 9,000 ft to 13,500 ft, -10 °C. 150 nm along the route, 6 nm southwest of the line.
as filed, and in English
```
PSC UA /OV PSC360025/TM 0108/FL135/TP PC12/SK OVC090-TOP135/TA M10/TB NEG /IC TRACE RM 135-090
```
Report
a routine report filed through PSC
Where
25 nm north (360°) of PSC
Time
01:08 UTC
Height
at 13,500 ft
Aircraft
PC12
Sky
overcast from 9,000 ft, tops 13,500 ft
Temperature
−10 °C
Turbulence
none
Icing
trace remarks from 13,500 ft to 9,000 ft
PC12 at 6,000 ft, 43 nm south, 5:56 pm PDT (00:56 UTC): overcast above 6,000 ft. 180 nm along the route, 43 nm south of the line.
as filed, and in English
```
ALW UA /OV ALW200015/TM 0056/FL060/TP PC12/SK OVC060
```
Report
a routine report filed through ALW
Where
15 nm south (200°) of ALW
Time
00:56 UTC
Height
at 6,000 ft
Aircraft
PC12
Sky
overcast from 6,000 ft
A320 descending, 38 nm southwest, 5:54 pm PDT (00:54 UTC): overcast above 7,500 ft, remarks: braking action good during the descent runway 19. 539 nm along the route, 38 nm southwest of the line.
as filed, and in English
```
JAC UA /OV JAC/TM 0054/FLUNKN/TP A320/SK OVC075/RM BRAKING ACTION GOOD DURD RY19
```
Report
a routine report filed through JAC
Where
over JAC
Time
00:54 UTC
Height
height not given
Aircraft
A320
Sky
overcast from 7,500 ft
Remarks
braking action good during the descent runway 19
CRJ2 at 9,000 ft, 5 nm southwest, 5:35 pm PDT (00:35 UTC): light chop turbulence, vmc, remarks: occasional moderate turbulence at at 15,000 ft. 719 nm along the route, 5 nm southwest of the line.
as filed, and in English
```
CPR UA /OV CPR215015/TM 0035/FL090/TP CRJ2/WX VMC/TB LGT CHOP/RM OCNL MOD TURB AT 150
```
Report
a routine report filed through CPR
Where
15 nm southwest (215°) of CPR
Time
00:35 UTC
Height
at 9,000 ft
Aircraft
CRJ2
Weather
visual conditions
Turbulence
light chop
Remarks
occasional moderate turbulence at at 15,000 ft
B789 at 40,000 ft, 18 nm northeast, 5:22 pm PDT (00:22 UTC): light to moderate clear-air turbulence, remarks: zdvwc. 979 nm along the route, 18 nm northeast of the line.
as filed, and in English
```
SNY UA /OV SNY088072/TM 0022/FL400/TP B789/TB OCNL LGT-MOD CAT /RM ZDVWC
```
Report
a routine report filed through SNY
Where
72 nm east (088°) of SNY
Time
00:22 UTC
Height
at 40,000 ft
Aircraft
B789
Turbulence
occasional light to moderate clear-air turbulence
Remarks
zdvwc

13 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, LWS, DLN, LND, BFF, GLD, SLN, ICT, TUL, SGF, FSM, LIT, MEM, JAN, BHM, MGM, TLH, PIE). 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 8 kt	−3 kt		123 kt	17 h 57 min	4:20 pm EDT (20:20 UTC)
5,500 ft	250° at 6 kt	−2 kt		122 kt	18 h 06 min	4:29 pm EDT (20:29 UTC)
7,500 ft	240° at 7 kt	−2 kt	9 °C	122 kt	18 h 06 min	4:29 pm EDT (20:29 UTC)
9,500 ft	250° at 10 kt	−5 kt	7 °C	125 kt	17 h 40 min	4:03 pm EDT (20:03 UTC)
11,500 ft	250° at 13 kt	−7 kt	4 °C	127 kt	17 h 23 min	3:46 pm EDT (19:46 UTC)
13,500 ft	250° at 15 kt	−9 kt	0 °C	129 kt	17 h 07 min	3:30 pm EDT (19:30 UTC)
15,500 ft	250° at 16 kt	−10 kt	-4 °C	130 kt	16 h 59 min	3:22 pm EDT (19:22 UTC)
17,500 ft	250° at 17 kt	−11 kt	-9 °C	131 kt	16 h 51 min	3:14 pm EDT (19:14 UTC)
18,000 ft FL180	250° at 18 kt	−11 kt	-10 °C	131 kt	16 h 51 min	3:14 pm EDT (19:14 UTC)
24,000 ft FL240	240° at 23 kt	−13 kt	-20 °C	133 kt	16 h 36 min	2:59 pm EDT (18:59 UTC)
30,000 ft FL300	240° at 30 kt	−15 kt	-33 °C	135 kt	16 h 21 min	2:44 pm EDT (18:44 UTC)
34,000 ft FL340	250° at 36 kt	−24 kt	-40 °C	144 kt	15 h 20 min	1:43 pm EDT (17:43 UTC)
39,000 ft FL390	260° at 38 kt	−28 kt	-48 °C	148 kt	14 h 55 min	1:18 pm EDT (17:18 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; 24 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; 34 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°
LWS	used from 150 nm out; 53 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°
DLN	used from 350 nm out; 54 nm from the line			080/10 -3°	180/8 -3°	180/23 -14°	200/58 -22°	200/80 -36°	220/85 -41°	230/81 -45°
LND	used from 549 nm out; 76 nm from the line			180/33 10°	190/50 3°	210/59 -9°	200/50 -21°	190/41 -34°	230/55 -39°	240/65 -47°
BFF	used from 749 nm out; 92 nm from the line		120/24	180/31 13°	210/26 7°	230/25 -7°	240/41 -20°	230/52 -36°	250/56 -41°	260/57 -45°
GLD	used from 949 nm out; 77 nm from the line		190/29	200/30 15°	240/23 8°	250/39 -7°	230/39 -19°	230/57 -31°	240/67 -39°	250/62 -49°
SLN	used from 1099 nm out; 70 nm from the line	190/37	220/39 20°	240/31 14°	250/24 7°	260/25 -7°	250/26 -17°	250/44 -31°	260/47 -40°	260/47 -50°
ICT	used from 1249 nm out; 52 nm from the line	190/34	210/34 18°	240/28 13°	260/23 7°	250/23 -6°	240/29 -17°	260/40 -30°	260/47 -40°	270/42 -51°
TUL	used from 1299 nm out; 75 nm from the line	200/27	210/28 15°	240/24 13°	250/19 8°	250/28 -6°	260/25 -16°	270/34 -30°	280/41 -39°	280/41 -52°
SGF	used from 1349 nm out; 65 nm from the line	210/21	210/21 16°	240/28 12°	260/24 7°	280/21 -6°	280/26 -18°	290/38 -31°	290/37 -41°	300/49 -52°
FSM	used from 1449 nm out; 75 nm from the line	200/18	210/19 15°	230/22 13°	250/18 7°	270/20 -5°	280/24 -16°	280/35 -30°	290/37 -40°	300/40 -52°
LIT	used from 1499 nm out; 41 nm from the line	220/12	250/12 17°	250/18 12°	260/22 6°	310/14 -5°	310/25 -17°	310/40 -31°	310/38 -41°	310/46 -52°
MEM	used from 1598 nm out; 51 nm from the line	240/9	280/14 17°	280/20 12°	290/25 5°	320/25 -6°	330/31 -18°	320/52 -32°	330/58 -41°	320/42 -50°
JAN	used from 1698 nm out; 80 nm from the line	260/6	310/14 17°	280/13 12°	290/19 6°	310/22 -5°	310/28 -17°	320/44 -32°	330/48 -41°	320/52 -51°
BHM	used from 1748 nm out; 90 nm from the line	300/16	330/32 16°	320/37 11°	330/37 6°	310/33 -7°	310/30 -18°	320/40 -34°	330/43 -41°	330/30 -49°
MGM	used from 1798 nm out; 58 nm from the line	300/16	330/30 16°	330/34 11°	320/31 7°	310/28 -7°	320/29 -17°	290/25 -34°	300/28 -41°	320/28 -50°
TLH	used from 1948 nm out; 53 nm from the line	300/17	340/32 17°	320/27 13°	300/27 8°	280/23 -7°	250/37 -17°	230/44 -33°	220/53 -41°	220/48 -51°
PIE	used from 2098 nm out; 68 nm from the line	310/7	270/12 17°	270/14 13°	260/14 8°	240/22 -5°	230/24 -16°	220/26 -31°	200/31 -41°	180/33 -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 Sky: a few clouds at 6,000 feet	calm	10+ mi	none	21 ft	6:53 pm PDT (01:53 UTC)
MWH Moses Lake, WA	120 nm out, 20 nm northeast of the line, tower	VFR Sky: a broken layer at 9,000 feet, overcast at 11,000 feet	from the east (080°) at 4 knots	10+ mi	9,000 ft	1,188 ft	01:52 UTC
LWS Lewiston, ID	230 nm out, 7 nm north of the line, tower	VFR Sky: overcast at 6,000 feet	from the west-northwest (300°) at 8 knots	10+ mi	6,000 ft	1,442 ft	01:56 UTC
HSG Thermopolis, WY	629 nm out, 13 nm north of the line	IFR Sky: overcast at 600 feet Weather: mist	from the north (360°) at 5 knots	4 mi	600 ft	4,891 ft	02:15 UTC
CPR Casper, WY	719 nm out, 10 nm northeast of the line, tower	VFR Sky: a few clouds at 11,000 feet	from the northwest (310°) at 7 knots	10+ mi	none	5,344 ft	01:53 UTC
NRN Norton, KS	1069 nm out, 5 nm northeast of the line	VFR	from the south (170°) at 12 knots	10+ mi	none	2,384 ft	02:15 UTC
SLN Salina, KS	1189 nm out, 11 nm northeast of the line, tower	VFR	from the south (170°) at 13 knots	10+ mi	none	1,288 ft	01:53 UTC
ROG Rogers, AR	1419 nm out, 11 nm southwest of the line, tower	VFR	from the south (190°) at 8 knots	10+ mi	none	1,358 ft	01:58 UTC
GTR Columbus/W Point/Starkville, MS	1738 nm out, 20 nm northeast of the line, tower	VFR	calm	10+ mi	none	264 ft	01:56 UTC
SEM Selma, AL	1838 nm out, 22 nm northeast of the line, tower	reported, no category	from the east (080°) at 27 knots, gusting to 37		3,300 ft	166 ft	01:30 UTC
BKV Brooksville, FL	2168 nm out, 6 nm east of the line, tower	VFR	calm	10+ mi	none	76 ft	01:53 UTC
LAL Lakeland, FL	destination	VFR	from the west-northwest (300°) at 5 knots	10+ mi	none	141 ft	9:50 pm EDT (01:50 UTC)

The highest airport on this list sits at 5,344 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At LAL when you get there the forecast at the estimated arrival, 1:18 pm EDT (17:18 UTC)

Wind from the north at 8 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for LAL

From Sun 8:00 pm EDT (00:00 UTC): wind from the north at 4 knots, visibility more than 6 miles, a few clouds at 3,000 feet, a broken layer at 25,000 feet
From Sun 11:00 pm EDT (03:00 UTC): wind from the north at 4 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the north at 8 knots, visibility more than 6 miles, clear skies

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

No temporary flight restriction on or near this route right now.

Daylight

Sunset at BFI 6:27 pm PDT (01:27 UTC), at LAL 7:02 pm EDT (23:02 UTC) (civil twilight ends 7:25 pm EDT (23:25 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 southern Plains · 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, Lakeland Linder International.