Plan a flight · Mon 6:59 am EDT (10:59 UTC)

St. Pete-Clearwater International to Boeing Fld/King County International PIE → BFI

2,185 nautical miles (2,515 statute miles) northwest on a straight line, true course 313°, about 318° magnetic at the departure end (variation 5W). At 120 knots that is 19 h 20 min at the quickest height in today's winds (16,500 ft, a 7-knot headwind), arriving about 11:19 pm PDT (06:19 UTC), after sunset at the destination. Right now PIE is VFR, wind from the north (350°) at 5 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

AIRMET TANGO 2W: 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 738 to 1148 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 1297 to 1477 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Over the route from 1307 to 1477 nm out.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 ft. Over the route from 1367 to 1457 nm out.
AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Near the route, 1477 nm along the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 1507 to 1756 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 1637 to 1946 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1667 to 2006 nm out.
AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 1776 to 2016 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 1856 to 2155 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 PIE.

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

E55P at 25,000 ft, 27 nm northeast, 6:45 am EDT (10:45 UTC): light to moderate chop turbulence. 120 nm along the route, 27 nm northeast of the line.
as filed, and in English
```
TLH UA /OV TLH165050/TM 1045/FL250/TP E55P/TB CONS LGT-MOD CHOP
```
Report
a routine report filed through TLH
Where
50 nm south (165°) of TLH
Time
10:45 UTC
Height
at 25,000 ft
Aircraft
E55P
Turbulence
continuous light to moderate chop
E170 at 2,000 ft, 50 nm northeast, 6:05 am EDT (10:05 UTC): clear, remarks: ground fog. 170 nm along the route, 50 nm northeast of the line.
as filed, and in English
```
TLH UA /OV TLH/TM 1005/FL20/TP E170/SK CLR/RM GROUND FOG
```
Report
a routine report filed through TLH
Where
over TLH
Time
10:05 UTC
Height
at 2,000 ft
Aircraft
E170
Sky
clear
Remarks
ground fog
BE9L at 17,000 ft, 18 nm north, 5:42 am EDT (09:42 UTC): light rime icing from 15,000 ft to 17,000 ft, 0 °C, remarks: zdvwc. 1477 nm along the route, 18 nm north of the line.
as filed, and in English
```
CPR UA /OV DDY250025/TM 0942/FL170/TP BE9L/TA 00/IC LGT RIME 150-170/RM ZDVWC
```
Report
a routine report filed through CPR
Where
25 nm west (250°) of DDY
Time
09:42 UTC
Height
at 17,000 ft
Aircraft
BE9L
Temperature
0 °C
Icing
light rime from 15,000 ft to 17,000 ft
Remarks
zdvwc

Winds aloft along the route, and the time en route the forecast for use 08:00–15:00 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 (PIE, TLH, MGM, JAN, MEM, LIT, FSM, TUL, ICT, SLN, GLD, BFF, LND, DLN, 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	270° at 18 kt	+14 kt		106 kt	20 h 37 min	12:36 am PDT (07:36 UTC)
6,500 ft	270° at 17 kt	+14 kt	12 °C	106 kt	20 h 37 min	12:36 am PDT (07:36 UTC)
8,500 ft	260° at 13 kt	+10 kt	7 °C	110 kt	19 h 52 min	11:51 pm PDT (06:51 UTC)
10,500 ft	260° at 13 kt	+8 kt	5 °C	112 kt	19 h 31 min	11:30 pm PDT (06:30 UTC)
12,500 ft	250° at 14 kt	+8 kt	1 °C	112 kt	19 h 31 min	11:30 pm PDT (06:30 UTC)
14,500 ft	250° at 14 kt	+8 kt	-3 °C	112 kt	19 h 31 min	11:30 pm PDT (06:30 UTC)
16,500 ft	250° at 15 kt	+7 kt	-7 °C	113 kt	19 h 20 min	11:19 pm PDT (06:19 UTC)
18,000 ft FL180	240° at 15 kt	+7 kt	-11 °C	113 kt	19 h 20 min	11:19 pm PDT (06:19 UTC)
24,000 ft FL240	250° at 23 kt	+13 kt	-21 °C	107 kt	20 h 25 min	12:24 am PDT (07:24 UTC)
30,000 ft FL300	270° at 34 kt	+27 kt	-32 °C	93 kt	23 h 30 min	3:29 am PDT (10:29 UTC)
34,000 ft FL340	270° at 34 kt	+29 kt	-38 °C	91 kt	24 h 01 min	4:00 am PDT (11:00 UTC)
39,000 ft FL390	260° at 32 kt	+26 kt	-47 °C	94 kt	23 h 15 min	3:14 am PDT (10:14 UTC)

Based on data from the 12th at 06:00 UTC; valid on the 12th at 12:00 UTC for use 08:00 to 15:00 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
PIE	used from 0 nm out; 25 nm from the line	360/10	340/12 18°	330/9 13°	290/12 8°	260/21 -7°	280/18 -18°	250/20 -33°	250/26 -41°	250/20 -51°
TLH	used from 100 nm out; 64 nm from the line	340/23	350/26 17°	350/21 11°	300/13 6°	320/25 -6°	340/35 -16°	350/44 -32°	360/51 -42°	350/33 -52°
MGM	used from 249 nm out; 79 nm from the line	320/19	330/16 17°	340/21 11°	330/11 5°	330/27 -6°	330/21 -17°	330/37 -32°	340/44 -40°	360/30 -52°
JAN	used from 399 nm out; 69 nm from the line	240/10	260/15 18°	280/10 11°	290/6 6°	290/15 -5°	300/15 -17°	320/35 -30°	330/38 -40°	330/39 -51°
MEM	used from 499 nm out; 82 nm from the line	250/19	260/19 17°	270/20 12°	270/16 6°	270/21 -6°	290/27 -17°	300/37 -30°	300/49 -40°	310/40 -51°
LIT	used from 549 nm out; 65 nm from the line	250/22	250/25 18°	240/23 12°	240/20 7°	250/17 -6°	260/25 -17°	300/45 -29°	300/49 -40°	310/43 -51°
FSM	used from 699 nm out; 52 nm from the line	230/33	260/23 15°	240/23 11°	230/18 8°	230/20 -8°	250/31 -17°	280/51 -30°	280/52 -39°	300/47 -51°
TUL	used from 798 nm out; 52 nm from the line	230/42	250/23 17°	220/16 14°	240/10 8°	240/20 -6°	260/28 -17°	270/61 -29°	280/52 -38°	290/46 -50°
ICT	used from 898 nm out; 32 nm from the line	230/45	240/33 21°	230/23 14°	230/22 7°	240/29 -7°	240/36 -20°	260/78 -29°	270/69 -36°	270/56 -49°
SLN	used from 948 nm out; 32 nm from the line	230/49	240/41 22°	230/26 15°	220/21 7°	240/38 -8°	240/44 -21°	260/77 -29°	270/70 -36°	270/63 -48°
GLD	used from 1098 nm out; 68 nm from the line		260/37	260/25 14°	250/27 8°	230/36 -8°	230/49 -21°	250/71 -30°	260/82 -36°	250/73 -48°
BFF	used from 1247 nm out; 58 nm from the line		280/28	260/39 11°	240/34 5°	210/38 -11°	210/52 -22°	230/61 -31°	230/61 -36°	240/56 -45°
LND	used from 1447 nm out; 82 nm from the line			240/10 3°	240/30 0°	220/42 -13°	230/52 -23°	220/54 -33°	220/52 -36°	220/53 -44°
DLN	used from 1647 nm out; 92 nm from the line			190/10 -4°	220/23 -4°	210/21 -18°	210/43 -28°	210/60 -33°	210/72 -37°	210/67 -44°
LWS	used from 1846 nm out; 88 nm from the line	L/V	340/5 -3°	L/V -6°	040/7 -10°	100/23 -22°	180/30 -31°	190/11 -34°	200/11 -36°	220/23 -40°
YKM	used from 2046 nm out; 42 nm from the line	360/6	360/11 -1°	030/20 -7°	040/21 -11°	020/55 -18°	010/84 -26°	010/79 -40°	010/45 -42°	350/23 -42°
SEA	used from 2146 nm out; 19 nm from the line	350/5	010/6 0°	010/9 -4°	010/27 -6°	010/51 -15°	360/58 -26°	360/60 -41°	350/55 -48°	340/30 -45°

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
PIE St Petersburg-Clearwater, FL	departure	VFR	from the north (350°) at 5 knots	10+ mi	none	10 ft	6:53 am EDT (10:53 UTC)
AAF Apalachicola, FL	160 nm out, 6 nm west of the line	VFR	from the north-northwest (330°) at 4 knots	10+ mi	none	19 ft	10:53 UTC
ECP Panama City, FL	220 nm out, 3 nm southwest of the line, tower	VFR	calm	10+ mi	none	68 ft	10:53 UTC
GWO Greenwood, MS	509 nm out, 3 nm southwest of the line, tower	VFR	from the south (190°) at 3 knots	10+ mi	none	162 ft	10:53 UTC
XNA Fayetteville/Springdale/Rogers, AR	778 nm out, 4 nm southeast of the line, tower	VFR	from the south (190°) at 6 knots	10+ mi	none	1,288 ft	10:53 UTC
BEC Wichita, KS	938 nm out, 16 nm southwest of the line, tower	VFR	from the south (190°) at 13 knots, gusting to 21	10+ mi	none	1,408 ft	10:35 UTC
OIN Oberlin, KS	1138 nm out, 2 nm north of the line	VFR	from the southwest (220°) at 12 knots	10+ mi	none	2,706 ft	10:35 UTC
CPR Casper, WY	1467 nm out, 20 nm northeast of the line, tower	VFR Sky: a broken layer at 5,500 feet, a broken layer at 7,000 feet	from the west-southwest (240°) at 14 knots	10+ mi	5,500 ft	5,344 ft	10:53 UTC
DUB Dubois, WY	1607 nm out, 14 nm south of the line	VFR Sky: scattered clouds at 4,300 feet, scattered clouds at 5,000 feet	from the west-northwest (290°) at 10 knots	10+ mi	none	7,298 ft	10:35 UTC
LWS Lewiston, ID	1956 nm out, 10 nm north of the line, tower	VFR Sky: a broken layer at 7,000 feet	calm	10+ mi	7,000 ft	1,442 ft	10:56 UTC
MWH Moses Lake, WA	2066 nm out, 22 nm northeast of the line, tower	VFR	from the north-northwest (340°) at 6 knots	10+ mi	none	1,188 ft	10:52 UTC
BFI Seattle, WA	destination	VFR	calm	10+ mi	none	21 ft	3:53 am PDT (10:53 UTC)

The highest airport on this list sits at 7,298 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, 11:19 pm PDT (06:19 UTC)

Wind calm, visibility more than 6 miles, clear skies VFR

The whole forecast for BFI

From Mon 2:00 am PDT (09:00 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 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
From Mon 7:00 pm PDT (02:00 UTC): wind calm, visibility more than 6 miles, clear skies

The forecast for PIE, the departure

From Mon 2:00 am EDT (06:00 UTC): wind from the north at 6 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 9 knots, visibility more than 6 miles, clear skies
From Mon 9:00 pm EDT (01:00 UTC): wind from the north at 6 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 PIE 7:04 pm EDT (23:04 UTC), at BFI 6:25 pm PDT (01:25 UTC) (civil twilight ends 6:56 pm PDT (01:56 UTC)). At 120 knots the arrival at BFI is after sunset there (6:27 pm PDT (01:27 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 Southeast · loop National Weather Service

Radar now, the lower Mississippi valley · 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: St. Pete-Clearwater International, Boeing Fld/King County International.