Plan a flight · Mon 7:01 am PDT (14:01 UTC)

Boeing Fld/King County International to Hartsfield/Jackson Atlanta International BFI → ATL

1,893 nautical miles (2,179 statute miles) east on a straight line, true course 102°, about 087° magnetic at the departure end (variation 15E). At 120 knots that is 12 h 27 min at the quickest height in today's winds (39,000 ft, a 32-knot tailwind), arriving about 10:28 pm EDT (02:28 UTC), after sunset at the destination. Right now BFI is VFR, wind from the southeast (130°) at 3 knots; ATL is VFR, wind from the northwest (310°) 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: 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

AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 50 to 329 nm out.
AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 169 to 458 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 179 to 668 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 369 to 996 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 478 to 638 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Near the route, 797 nm along the route.
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 1146 to 1445 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 B763 at 2,000 ft, 43 nm southwest, 4:57 am PDT (11:57 UTC): a routine report with nothing remarked on. 1266 nm along the route, 43 nm southwest of the line.
as filed, and in English
```
FOE UUA /OV 130003/TM 1157/FL020/TP B763/WV LLWS
```
Report
an urgent report filed through FOE
Where
wind from 130° at 3 knots
Time
11:57 UTC
Height
at 2,000 ft
Aircraft
B763
Wind
low-level wind shear
GLF4 descending, 28 nm northeast, 6:48 am PDT (13:48 UTC): a routine report with nothing remarked on. 468 nm along the route, 28 nm northeast of the line.
as filed, and in English
```
BZN UA /OV BZN/TM 1348/FLDURD/TP GLF4/SK 047
```
Report
a routine report filed through BZN
Where
over BZN
Time
13:48 UTC
Height
during the descent
Aircraft
GLF4
Sky
at 4,700 ft
C340 descending, 28 nm northeast, 5:47 am PDT (12:47 UTC): light icing, remarks: smooth. 468 nm along the route, 28 nm northeast of the line.
as filed, and in English
```
BZN UA /OV BZN/TM 1247/FLDURD/TP C340/SK 055/IC LGT RM/RM SMOOTH
```
Report
a routine report filed through BZN
Where
over BZN
Time
12:47 UTC
Height
during the descent
Aircraft
C340
Sky
at 5,500 ft
Icing
light remarks
Remarks
smooth
UAL1095 at 36,000 ft, 50 nm northeast, 6:34 am PDT (13:34 UTC): light turbulence, -38 °C, wind 236° at 61 knots. 867 nm along the route, 50 nm northeast of the line.
as filed, and in English
```
ARP UAL1095 4328N 10223W 1334 F360 MS38 236/061KT TB LIGHT SK IC
```
Report
a routine report filed through ARP
BE20 at 8,000 ft, 35 nm south, 6:15 am PDT (13:15 UTC): no turbulence, no icing, remarks: durd-zdvwc 31. 887 nm along the route, 35 nm south of the line.
as filed, and in English
```
AIA UA /OV KAIA/TM 1315/FL080/TP BE20/SK TOP 045 BASE 002/TB NEG/IC NEG/RM DURD-ZDVWC- 31
```
Report
a routine report filed through AIA
Where
over KAIA
Time
13:15 UTC
Height
at 8,000 ft
Aircraft
BE20
Sky
top 4,500 ft base 200 ft
Turbulence
none
Icing
none
Remarks
durd-zdvwc 31
B738 at 38,000 ft, 47 nm southwest, 6:09 am PDT (13:09 UTC): light chop turbulence, remarks: ZDVWC-35. 996 nm along the route, 47 nm southwest of the line.
as filed, and in English
```
LBF UA /OV LBF/TM 1309/FL380/TP B738/TB CONS LGT CHOP/RM -ZDVWC-35
```
Report
a routine report filed through LBF
Where
over LBF
Time
13:09 UTC
Height
at 38,000 ft
Aircraft
B738
Turbulence
continuous light chop
Remarks
ZDVWC-35
CRJ7 at 36,000 ft, 47 nm southwest, 5:09 am PDT (12:09 UTC): light chop turbulence, remarks: zdvwc. 996 nm along the route, 47 nm southwest of the line.
as filed, and in English
```
LBF UA /OV LBF/TM 1209/FL360/TP CRJ7/TB LGT CHOP/RM ZDVWC
```
Report
a routine report filed through LBF
Where
over LBF
Time
12:09 UTC
Height
at 36,000 ft
Aircraft
CRJ7
Turbulence
light chop
Remarks
zdvwc
B38M at 39,000 ft, 32 nm southwest, 5:43 am PDT (12:43 UTC): light chop turbulence. 1076 nm along the route, 32 nm southwest of the line.
as filed, and in English
```
HSI UA /OV HSI270030/TM 1243/FL390/TP B38M/TB CONS LGT CHOP
```
Report
a routine report filed through HSI
Where
30 nm west (270°) of HSI
Time
12:43 UTC
Height
at 39,000 ft
Aircraft
B38M
Turbulence
continuous light chop
B38M at 17,000 ft, 34 nm northeast, 5:41 am PDT (12:41 UTC): no turbulence, remarks: during the climb. 1166 nm along the route, 34 nm northeast of the line.
as filed, and in English
```
LNK UA /OV LNK/TM 1241/FL170/TP B38M/TB NEG/RM DURC
```
Report
a routine report filed through LNK
Where
over LNK
Time
12:41 UTC
Height
at 17,000 ft
Aircraft
B38M
Turbulence
none
Remarks
during the climb
B38M at 18,000 ft, 47 nm northeast, 6:04 am PDT (13:04 UTC): light chop turbulence. 1256 nm along the route, 47 nm northeast of the line.
as filed, and in English
```
EVU UA /OV EVU/TM 1304/FL180/TP B38M/TB CONS LGT CHOP
```
Report
a routine report filed through EVU
Where
over EVU
Time
13:04 UTC
Height
at 18,000 ft
Aircraft
B38M
Turbulence
continuous light chop
SF50 at 14,000 ft, 49 nm northeast, 5:50 am PDT (12:50 UTC): light chop turbulence from 14,000 ft to 20,000 ft, remarks: ZME60. 1754 nm along the route, 49 nm northeast of the line.
as filed, and in English
```
BNA UA /OV BNA135040/TM 1250/FL140/TP SF50/SK SKC140/TB OCNL LGT CHOP 200-140/RM ZME60
```
Report
a routine report filed through BNA
Where
40 nm southeast (135°) of BNA
Time
12:50 UTC
Height
at 14,000 ft
Aircraft
SF50
Sky
clear from 14,000 ft
Turbulence
occasional light chop from 20,000 ft to 14,000 ft
Remarks
ZME60
DA62 at 1,100 ft, 43 nm northeast, 6:05 am PDT (13:05 UTC): fog. 1814 nm along the route, 43 nm northeast of the line.
as filed, and in English
```
CHA UA /OV CHA 1S/TM 1305/FL011/TP DA62/SK VV002-TOP011/WX 1/8SM FG
```
Report
a routine report filed through CHA
Where
cha 1S
Time
13:05 UTC
Height
at 1,100 ft
Aircraft
DA62
Sky
sky obscured from 200 ft, tops 1,100 ft
Weather
1/8SM, fog
CRJ9 at 200 ft, 43 nm northeast, 5:30 am PDT (12:30 UTC): sky obscured, remarks: visual at mins runway 20 cha. 1814 nm along the route, 43 nm northeast of the line.
as filed, and in English
```
CHA UA /OV CHA 1N/TM 1230/FL002/TP CRJ9/SK VV002/WX 1/8SM/RM VISUAL AT MINS RY 20 CHA
```
Report
a routine report filed through CHA
Where
cha 1N
Time
12:30 UTC
Height
at 200 ft
Aircraft
CRJ9
Sky
sky obscured from 200 ft
Weather
1/8SM
Remarks
visual at mins runway 20 cha
B712 at 1,500 ft, 43 nm northeast, 5:26 am PDT (12:26 UTC): remarks: during the climb runway 20 departure. 1814 nm along the route, 43 nm northeast of the line.
as filed, and in English
```
CHA UA /OV CHA/TM 1226/FL015/TP B712/SK TOP015/RM DURC. RY 20 DEPARTURE
```
Report
a routine report filed through CHA
Where
over CHA
Time
12:26 UTC
Height
at 1,500 ft
Aircraft
B712
Sky
TOP015
Remarks
during the climb runway 20 departure

4 more routine reports are on the map.

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 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 18 forecast points nearest it (SEA, YKM, GEG, LWS, DLN, BIL, LND, RAP, BFF, ONL, GRI, OMA, MKC, COU, CGI, BNA, HSV, ATL). 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	270° at 17 kt	−14 kt		134 kt	14 h 08 min	12:09 am EDT (04:09 UTC)
5,500 ft	260° at 16 kt	−13 kt	18 °C	133 kt	14 h 14 min	12:15 am EDT (04:15 UTC)
7,500 ft	260° at 13 kt	−10 kt	9 °C	130 kt	14 h 34 min	12:35 am EDT (04:35 UTC)
9,500 ft	260° at 13 kt	−9 kt	5 °C	129 kt	14 h 40 min	12:41 am EDT (04:41 UTC)
11,500 ft	250° at 13 kt	−9 kt	2 °C	129 kt	14 h 40 min	12:41 am EDT (04:41 UTC)
13,500 ft	250° at 14 kt	−8 kt	-2 °C	128 kt	14 h 47 min	12:48 am EDT (04:48 UTC)
15,500 ft	250° at 14 kt	−8 kt	-6 °C	128 kt	14 h 47 min	12:48 am EDT (04:48 UTC)
17,500 ft	250° at 14 kt	−8 kt	-10 °C	128 kt	14 h 47 min	12:48 am EDT (04:48 UTC)
18,000 ft FL180	250° at 14 kt	−8 kt	-11 °C	128 kt	14 h 47 min	12:48 am EDT (04:48 UTC)
24,000 ft FL240	240° at 23 kt	−11 kt	-23 °C	131 kt	14 h 27 min	12:28 am EDT (04:28 UTC)
30,000 ft FL300	260° at 32 kt	−26 kt	-33 °C	146 kt	12 h 58 min	10:59 pm EDT (02:59 UTC)
34,000 ft FL340	260° at 37 kt	−31 kt	-38 °C	151 kt	12 h 32 min	10:33 pm EDT (02:33 UTC)
39,000 ft FL390	260° at 38 kt	−32 kt	-46 °C	152 kt	12 h 27 min	10:28 pm EDT (02:28 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
SEA	used from 0 nm out; 25 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°
YKM	used from 50 nm out; 41 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°
GEG	used from 149 nm out; 53 nm from the line		060/7 -2°	070/12 -6°	050/8 -8°	120/11 -21°	110/18 -33°	030/22 -37°	040/6 -38°	240/7 -41°
LWS	used from 199 nm out; 14 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°
DLN	used from 349 nm out; 56 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°
BIL	used from 498 nm out; 84 nm from the line		300/14	270/19 -2°	260/26 -2°	220/28 -13°	210/51 -25°	220/56 -33°	220/61 -39°	220/72 -45°
LND	used from 648 nm out; 108 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°
RAP	used from 698 nm out; 125 nm from the line		250/28 16°	260/31 10°	240/25 4°	210/35 -10°	200/45 -23°	230/47 -31°	230/47 -36°	230/51 -46°
BFF	used from 847 nm out; 60 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°
ONL	used from 947 nm out; 100 nm from the line		250/31 22°	230/27 16°	220/25 8°	230/25 -9°	220/29 -22°	250/42 -33°	250/48 -36°	250/52 -46°
GRI	used from 1046 nm out; 28 nm from the line		230/39 23°	230/32 15°	210/29 7°	230/31 -8°	230/43 -21°	250/52 -31°	260/59 -35°	260/59 -46°
OMA	used from 1196 nm out; 82 nm from the line	230/47	240/33 21°	230/22 13°	220/27 5°	240/35 -8°	250/43 -21°	260/47 -33°	260/59 -36°	270/58 -46°
MKC	used from 1246 nm out; 33 nm from the line	240/49	240/21 20°	220/19 13°	230/21 6°	260/26 -7°	250/37 -19°	270/66 -31°	270/65 -38°	280/60 -48°
COU	used from 1345 nm out; 51 nm from the line	250/36	260/14 16°	250/5 12°	260/12 6°	260/24 -7°	260/35 -19°	280/58 -31°	280/62 -40°	290/60 -49°
CGI	used from 1495 nm out; 51 nm from the line	260/22	250/15 15°	250/13 11°	250/16 6°	270/29 -7°	280/30 -18°	290/40 -31°	290/55 -40°	300/51 -51°
BNA	used from 1644 nm out; 70 nm from the line	300/20	300/14 15°	300/14 10°	300/13 4°	310/22 -5°	280/24 -18°	310/37 -33°	310/50 -41°	320/49 -51°
HSV	used from 1694 nm out; 50 nm from the line	300/20	310/14 16°	310/18 10°	310/15 4°	320/19 -5°	290/16 -18°	320/36 -32°	320/47 -41°	330/42 -50°
ATL	used from 1843 nm out; 25 nm from the line	330/32	340/36 17°	350/34 10°	340/25 6°	330/27 -6°	350/35 -18°	330/49 -32°	340/47 -41°	340/27 -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 southeast (130°) at 3 knots	10+ mi	none	21 ft	6:53 am PDT (13:53 UTC)
MWH Moses Lake, WA	120 nm out, 10 nm northeast of the line, tower	VFR	from the north (010°) at 4 knots	10+ mi	none	1,188 ft	13:52 UTC
LWS Lewiston, ID	229 nm out, 14 nm southwest of the line, tower	VFR Sky: overcast at 4,300 feet	from the east-southeast (120°) at 3 knots	10+ mi	4,300 ft	1,442 ft	13:56 UTC
RVF Twin Bridges, MT	428 nm out, 2 nm south of the line	marginal VFR Sky: overcast at 2,600 feet	from the north-northeast (030°) at 16 knots	10+ mi	2,600 ft	4,788 ft	13:55 UTC
GEY Greybull, WY	618 nm out, 5 nm northeast of the line	marginal VFR Sky: overcast at 1,200 feet	from the northwest (310°) at 7 knots	10+ mi	1,200 ft	3,941 ft	13:53 UTC
CDR Chadron, NE	857 nm out, 2 nm northeast of the line	IFR Sky: overcast at 600 feet	from the west-southwest (250°) at 3 knots	10+ mi	600 ft	3,297 ft	13:53 UTC
GRI Grand Island, NE	1096 nm out, 3 nm east of the line, tower	VFR	from the south (190°) at 12 knots	10+ mi	none	1,847 ft	13:53 UTC
MCI Kansas City, MO	1295 nm out, 4 nm west of the line, tower	VFR Sky: a broken layer at 20,000 feet	from the south-southwest (200°) at 15 knots, gusting to 25	10+ mi	20,000 ft	1,027 ft	13:53 UTC
TBN Fort Leonard Wood, MO	1445 nm out, 17 nm southwest of the line, tower	VFR	from the south-southwest (200°) at 8 knots, gusting to 16	10+ mi	none	1,159 ft	13:55 UTC
UCY Union City, TN	1614 nm out, 1 nm southeast of the line	VFR Weather: mist	from the south (180°) at 5 knots	6 mi	none	345 ft	13:35 UTC
RYY Atlanta, GA	1873 nm out, 13 nm northeast of the line, tower	VFR	from the west-northwest (290°) at 3 knots	10+ mi	none	1,040 ft	13:50 UTC
ATL Atlanta, GA	destination	VFR Sky: a few clouds at 20,000 feet	from the northwest (310°) at 10 knots	10+ mi	none	1,026 ft	9:52 am EDT (13:52 UTC)

The highest airport on this list sits at 4,788 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At ATL when you get there the forecast at the estimated arrival, 10:28 pm EDT (02:28 UTC)

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

The whole forecast for ATL

From Mon 10:00 am EDT (14:00 UTC): wind from the northwest at 10 knots, visibility more than 6 miles, clear skies
From Mon 12:00 pm EDT (16:00 UTC): wind from the northwest at 10 knots, gusting to 20, visibility more than 6 miles, clear skies
From Mon 6:00 pm EDT (22:00 UTC): wind from the northwest at 6 knots, visibility more than 6 miles, clear skies

The forecast for BFI, the departure

From Mon 5:00 am PDT (12:00 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 4 knots, visibility more than 6 miles, clear skies
From Mon 2:00 pm PDT (21:00 UTC): wind from the west-northwest at 5 knots, visibility more than 6 miles, clear skies
From Mon 8:00 pm PDT (03:00 UTC): wind calm, visibility more than 6 miles, scattered clouds at 25,000 feet
From Tue 4:00 am PDT (11:00 UTC): wind from the south-southeast at 4 knots, visibility more than 6 miles, overcast at 10,000 feet

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

6/8927 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local 23 nm from the route, 329 nm along the route · a VIP movement · starts Wednesday 14 October · ZSE
6/8923 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local 23 nm from the route, 329 nm along the route · a VIP movement · starts Wednesday 14 October · ZLC
6/8928 Atlanta, GA, Wednesday, October 14, 2026 Local on the route, at the destination end · a VIP movement · starts Wednesday 14 October · ZTL

Daylight

Sunset at BFI 6:25 pm PDT (01:25 UTC), at ATL 7:07 pm EDT (23:07 UTC) (civil twilight ends 7:32 pm EDT (23:32 UTC)). At 120 knots the arrival at ATL is after sunset there (7:07 pm EDT (23:07 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 upper Mississippi valley · 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, Hartsfield/Jackson Atlanta International.