Plan a flight · Sun 6:51 pm PDT (01:51 UTC)

Boeing Fld/King County International to Lincoln Airport BFI → LNK

1,164 nautical miles (1,340 statute miles) east on a straight line, true course 101°, about 086° magnetic at the departure end (variation 15E). At 120 knots that is 7 h 34 min at the quickest height in today's winds (39,000 ft, a 34-knot tailwind), arriving about 4:25 am CDT (09:25 UTC), after sunset at the destination. Right now BFI is VFR, wind from the northwest (310°) at 6 knots; LNK is VFR, wind from the south (170°) at 10 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 3W: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the southwest at 40 knots, until 7:55 pm PDT (02:55 UTC). Over the route from 607 to 746 nm out.
as issued
```
WSUS33 KKCI 120055
MKCW WST 120055
CONVECTIVE SIGMET 3W
VALID UNTIL 0255Z
MT WY
FROM 10WSW MLS-70E DDY-20N LAR-50E BPI-30NE BIL-10WSW MLS
AREA TS MOV FROM 22040KT. TOPS TO FL310.
```
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 139 nm of the route.
AIRMET ZULU 2C: moderate icing up to 16,000 ft. Over the route from 99 to 428 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 199 to 667 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 876 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 308 to 696 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 487 to 756 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 517 to 657 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 686 to 706 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 last 60 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 BFI.

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

E75L at 14,000 ft, 22 nm northeast, 4:22 pm PDT (23:22 UTC): moderate turbulence from 14,000 ft to 21,000 ft, remarks: during the climb zlc. 338 nm along the route, 22 nm northeast of the line.
as filed, and in English
```
MSO UA /OV 32S/TM 2322/FL140/TP E75L/TB MOD 140-210/RM DURC /ZLC
```
Report
a routine report filed through MSO
Where
over 32S
Time
23:22 UTC
Height
at 14,000 ft
Aircraft
E75L
Turbulence
moderate from 14,000 ft to 21,000 ft
Remarks
during the climb zlc
PC12 at 13,000 ft, 34 nm south, 5:42 pm PDT (00:42 UTC): remarks: zse. At the departure end, 34 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
PC12 at 15,000 ft, 34 nm south, 5:42 pm PDT (00:42 UTC): remarks: zse. At the departure end, 34 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 13,500 ft, 23 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. 149 nm along the route, 23 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
C25B at 4,100 ft, 44 nm north, 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, 44 nm north 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
B738 at 24,000 ft, 16 nm northeast, 4:13 pm PDT (23:13 UTC): remarks: snow top flight level at 24,000 ft zlc. 438 nm along the route, 16 nm northeast of the line.
as filed, and in English
```
BZN UA /OV BZN270030/TM 2313/FL240/TP B738/RM SN TOP FL 240 /ZLC
```
Report
a routine report filed through BZN
Where
30 nm west (270°) of BZN
Time
23:13 UTC
Height
at 24,000 ft
Aircraft
B738
Remarks
snow top flight level at 24,000 ft zlc
E75L descending, 16 nm northeast, 6:04 pm PDT (01:04 UTC): remarks: had the airport in sight at 400-500FT above ground. 468 nm along the route, 16 nm northeast of the line.
as filed, and in English
```
BZN UA /OV BZN/TM 0104/FLDURD/TP E75L/RM HAD THE AIRPORT IN SIGHT AT 400-500FT AGL
```
Report
a routine report filed through BZN
Where
over BZN
Time
01:04 UTC
Height
during the descent
Aircraft
E75L
Remarks
had the airport in sight at 400-500FT above ground
B737 descending, 16 nm northeast, 5:28 pm PDT (00:28 UTC): scattered clouds above 8,000 ft, fog, snow, remarks: broke out about 100FT above mins. 468 nm along the route, 16 nm northeast of the line.
as filed, and in English
```
BZN UA /OV BZN/TM 0028/FLDURD/TP B737/SK SCT080/WX 1/2SM SN FG/RM BROKE OUT ABOUT 100FT ABOVE MINS
```
Report
a routine report filed through BZN
Where
over BZN
Time
00:28 UTC
Height
during the descent
Aircraft
B737
Sky
scattered clouds from 8,000 ft
Weather
1/2SM, snow, fog
Remarks
broke out about 100FT above mins

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 11 forecast points nearest it (SEA, YKM, GEG, LWS, DLN, BIL, RAP, BFF, ONL, GRI, OMA). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
5,500 ft	110° at 8 kt	+10 kt	13 °C	110 kt	10 h 35 min	7:26 am CDT (12:26 UTC)
7,500 ft	120° at 6 kt	+7 kt	4 °C	113 kt	10 h 18 min	7:09 am CDT (12:09 UTC)
9,500 ft	170° at 6 kt	+4 kt	2 °C	116 kt	10 h 02 min	6:53 am CDT (11:53 UTC)
11,500 ft	200° at 11 kt	+1 kt	-1 °C	119 kt	9 h 47 min	6:38 am CDT (11:38 UTC)
13,500 ft	210° at 14 kt	−1 kt	-4 °C	121 kt	9 h 37 min	6:28 am CDT (11:28 UTC)
15,500 ft	220° at 16 kt	−3 kt	-8 °C	123 kt	9 h 28 min	6:19 am CDT (11:19 UTC)
17,500 ft	220° at 18 kt	−5 kt	-12 °C	125 kt	9 h 19 min	6:10 am CDT (11:10 UTC)
18,000 ft FL180	220° at 18 kt	−6 kt	-13 °C	126 kt	9 h 14 min	6:05 am CDT (11:05 UTC)
24,000 ft FL240	230° at 29 kt	−14 kt	-23 °C	134 kt	8 h 41 min	5:32 am CDT (10:32 UTC)
30,000 ft FL300	220° at 36 kt	−13 kt	-36 °C	133 kt	8 h 45 min	5:36 am CDT (10:36 UTC)
34,000 ft FL340	230° at 46 kt	−24 kt	-40 °C	144 kt	8 h 05 min	4:56 am CDT (09:56 UTC)
39,000 ft FL390	240° at 50 kt	−34 kt	-46 °C	154 kt	7 h 34 min	4:25 am CDT (09:25 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; 25 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; 43 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 149 nm out; 49 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°
LWS	used from 199 nm out; 20 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 348 nm out; 61 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°
BIL	used from 497 nm out; 74 nm from the line		080/24	130/14 -1°	180/33 0°	210/43 -10°	220/58 -21°	200/55 -36°	220/75 -44°	240/83 -48°
RAP	used from 696 nm out; 117 nm from the line		120/15 12°	180/22 11°	220/26 5°	230/35 -9°	240/40 -22°	240/50 -37°	240/51 -41°	240/47 -47°
BFF	used from 895 nm out; 101 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°
ONL	used from 945 nm out; 85 nm from the line		200/20 17°	230/26 14°	240/21 7°	250/27 -9°	260/32 -19°	240/44 -34°	240/56 -41°	250/62 -51°
GRI	used from 1045 nm out; 40 nm from the line		210/31 19°	240/21 14°	240/17 6°	260/27 -7°	260/34 -18°	240/45 -32°	250/56 -40°	260/62 -51°
OMA	used from 1144 nm out; 53 nm from the line	190/34	230/34 19°	250/25 12°	250/18 6°	250/22 -7°	250/28 -19°	260/34 -32°	260/39 -41°	280/56 -51°

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)
ESW Easton, WA	50 nm out, 8 nm southwest of the line	no report just now				2,226 ft
MWH Moses Lake, WA	119 nm out, 7 nm northeast of the line, tower	VFR Sky: overcast at 10,000 feet	from the northeast (050°) at 13 knots, gusting to 18	10+ mi	10,000 ft	1,188 ft	00:52 UTC
HRF Hamilton, MT	348 nm out, 7 nm north of the line	low IFR Sky: a broken layer at 400 feet, a broken layer at 1,000 feet, overcast at 1,300 feet Weather: light snow, mist	from the north-northwest (340°) at 6 knots	1.75 mi	400 ft	3,635 ft	01:35 UTC
BTM Butte, MT	418 nm out, 9 nm north of the line	IFR Sky: a few clouds at 800 feet, overcast at 1,700 feet Weather: light snow, mist	from the north-northwest (330°) at 7 knots	1.25 mi	1,700 ft	5,550 ft	01:20 UTC
BZN Bozeman, MT	468 nm out, 16 nm northeast of the line, tower	low IFR Sky: overcast at 300 feet Weather: light snow, mist	calm	1.5 mi	300 ft	4,473 ft	01:25 UTC
BYG Buffalo, WY	677 nm out, 3 nm north of the line	low IFR Sky: overcast at 200 feet Weather: rain, mist	from the north (360°) at 5 knots	2.5 mi	200 ft	4,970 ft	01:28 UTC
ECS Newcastle, WY	786 nm out, 16 nm north of the line	VFR Sky: a broken layer at 10,000 feet	from the south-southeast (150°) at 4 knots	10+ mi	10,000 ft	4,177 ft	01:35 UTC
IEN Pine Ridge, SD	876 nm out, 1 nm east of the line	no report just now				3,332 ft
BUB Burwell, NE	1045 nm out, 2 nm west of the line	no report just now				2,183 ft
ODX Ord, NE	1055 nm out, 5 nm southwest of the line	VFR	from the north (360°) at 7 knots	10+ mi	none	2,070 ft	00:53 UTC
LNK Lincoln, NE	destination	VFR	from the south (170°) at 10 knots	10+ mi	none	1,218 ft	7:54 pm CDT (00:54 UTC)

The highest airport on this list sits at 5,550 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At LNK when you get there the forecast at the estimated arrival, 4:25 am CDT (09:25 UTC)

Wind from the south at 14 knots, visibility more than 6 miles, low-level wind shear, a few clouds at 25,000 feet VFR

The whole forecast for LNK

From Sun 7:00 pm CDT (00:00 UTC): wind from the south at 11 knots, gusting to 24, visibility more than 6 miles, clear skies
From Sun 9:00 pm CDT (02:00 UTC): wind from the south at 14 knots, visibility more than 6 miles, low-level wind shear, a few clouds at 25,000 feet
From Mon 9:00 am CDT (14:00 UTC): wind from the southwest at 14 knots, gusting to 24, 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 LNK 6:51 pm CDT (23:51 UTC) (civil twilight ends 7:19 pm CDT (00:19 UTC)). At 120 knots the arrival at LNK is before sunrise there (7:34 am CDT (12:34 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, 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, Lincoln Airport.