Plan a flight · Sun 11:06 pm PDT (06:06 UTC)

Boeing Fld/King County International to Cincinnati/Northern Kentucky International BFI → CVG

1,703 nautical miles (1,960 statute miles) east on a straight line, true course 093°, about 078° magnetic at the departure end (variation 15E). At 120 knots that is 10 h 35 min at the quickest height in today's winds (39,000 ft, a 41-knot tailwind), arriving about 12:41 pm EDT (16:41 UTC). Right now BFI is VFR, wind calm; CVG is VFR, wind from the west (260°) at 4 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

AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 179 nm of the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 120 to 578 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 239 to 558 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 269 to 458 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 279 to 1046 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 598 to 697 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 637 to 707 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 687 to 767 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Near the route, 727 nm along the route.
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 1165 to 1394 nm out.
AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the last 129 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

CL30 at 4,200 ft, 2 nm northwest, 8:16 pm PDT (03:16 UTC): no icing, overcast above 4,200 ft, remarks: during the descent ils runway 12. 339 nm along the route, 2 nm northwest of the line.
as filed, and in English
```
MSO UA /OV MSO/TM 0316/FL042/TP CL30/SK OVC042/WX 2 1/2SM/IC NEG/RM DURD ILS RY 12
```
Report
a routine report filed through MSO
Where
over MSO
Time
03:16 UTC
Height
at 4,200 ft
Aircraft
CL30
Sky
overcast from 4,200 ft
Weather
2, 1/2SM
Icing
none
Remarks
during the descent ils runway 12
B737 , 44 nm south, 10:31 pm PDT (05:31 UTC): remarks: saw the light at 500FT braking good no icing. 468 nm along the route, 44 nm south of the line.
as filed, and in English
```
BZN UA /OV BZN/TM 0531/FLBURD/TP B737/RM SAW THE LIGHT AT 500FT. BRAKING GOOD. NEG ICING
```
Report
a routine report filed through BZN
Where
over BZN
Time
05:31 UTC
Height
at BURD
Aircraft
B737
Remarks
saw the light at 500FT braking good no icing
GLF5 descending, 44 nm south, 8:46 pm PDT (03:46 UTC): remarks: broke out 100-150FT above ground. 468 nm along the route, 44 nm south of the line.
as filed, and in English
```
BZN UA /OV BZN/TM 0346/FLDURD/TP GLF5/RM BROKE OUT 100-150FT AGL
```
Report
a routine report filed through BZN
Where
over BZN
Time
03:46 UTC
Height
during the descent
Aircraft
GLF5
Remarks
broke out 100-150FT above ground
B38M at 29,000 ft, 5 nm east, 9:52 pm PDT (04:52 UTC): no turbulence from 23,000 ft to 29,000 ft. 1514 nm along the route, 5 nm east of the line.
as filed, and in English
```
TIP UA /OV RBS/TM 0452/FL290/TP B38M/TB NEG 230-290
```
Report
a routine report filed through TIP
Where
over RBS
Time
04:52 UTC
Height
at 29,000 ft
Aircraft
B38M
Turbulence
no from 23,000 ft to 29,000 ft

Winds aloft along the route, and the time en route the forecast for use 02:00–09:00 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 17 forecast points nearest it (SEA, YKM, GEG, LWS, GPI, GTF, BIL, MLS, RAP, PIR, FSD, MCW, DBQ, BRL, JOT, IND, CVG). 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	240° at 14 kt	−8 kt		128 kt	13 h 18 min	3:24 pm EDT (19:24 UTC)
5,500 ft	210° at 6 kt	0	7 °C	120 kt	14 h 12 min	4:18 pm EDT (20:18 UTC)
7,500 ft	220° at 6 kt	−1 kt	9 °C	121 kt	14 h 04 min	4:10 pm EDT (20:10 UTC)
9,500 ft	220° at 7 kt	−2 kt	4 °C	122 kt	13 h 58 min	4:04 pm EDT (20:04 UTC)
11,500 ft	220° at 10 kt	−4 kt	1 °C	124 kt	13 h 44 min	3:50 pm EDT (19:50 UTC)
13,500 ft	230° at 13 kt	−6 kt	-3 °C	126 kt	13 h 31 min	3:37 pm EDT (19:37 UTC)
15,500 ft	230° at 15 kt	−9 kt	-6 °C	129 kt	13 h 12 min	3:18 pm EDT (19:18 UTC)
17,500 ft	240° at 17 kt	−11 kt	-10 °C	131 kt	13 h	3:06 pm EDT (19:06 UTC)
18,000 ft FL180	240° at 18 kt	−12 kt	-11 °C	132 kt	12 h 54 min	3:00 pm EDT (19:00 UTC)
24,000 ft FL240	240° at 20 kt	−14 kt	-23 °C	134 kt	12 h 43 min	2:49 pm EDT (18:49 UTC)
30,000 ft FL300	250° at 26 kt	−20 kt	-36 °C	140 kt	12 h 10 min	2:16 pm EDT (18:16 UTC)
34,000 ft FL340	260° at 38 kt	−35 kt	-41 °C	155 kt	10 h 59 min	1:05 pm EDT (17:05 UTC)
39,000 ft FL390	260° at 45 kt	−41 kt	-46 °C	161 kt	10 h 35 min	12:41 pm EDT (16:41 UTC)

Based on data from the 12th at 00:00 UTC; valid on the 12th at 06:00 UTC for use 02:00 to 09:00 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	050/7	050/11 1°	050/12 -5°	030/31 -7°	010/61 -15°	010/69 -26°	360/73 -40°	360/62 -47°	330/21 -43°
YKM	used from 50 nm out; 52 nm from the line	070/10	040/15 -1°	020/27 -8°	030/25 -13°	020/48 -20°	010/83 -27°	010/77 -37°	010/49 -40°	350/14 -41°
GEG	used from 100 nm out; 71 nm from the line		080/16 -2°	050/17 -7°	080/9 -10°	190/33 -21°	180/31 -32°	L/V -35°	L/V -37°	270/8 -40°
LWS	used from 249 nm out; 71 nm from the line	070/10	080/12 -2°	030/12 -6°	080/7 -10°	170/34 -21°	160/46 -32°	200/33 -35°	220/22 -35°	230/18 -38°
GPI	used from 299 nm out; 83 nm from the line		070/19 -5°	100/16 -7°	080/10 -8°	130/8 -19°	170/37 -28°	200/50 -40°	210/43 -40°	220/41 -42°
GTF	used from 349 nm out; 86 nm from the line		070/11	080/15 -7°	110/19 -9°	190/25 -14°	200/34 -23°	200/54 -39°	220/66 -40°	220/77 -44°
BIL	used from 498 nm out; 55 nm from the line		080/13	180/9 -2°	210/38 0°	220/51 -11°	210/46 -22°	210/58 -35°	230/73 -39°	230/72 -45°
MLS	used from 647 nm out; 45 nm from the line		150/23 2°	190/29 4°	210/44 2°	220/32 -10°	210/36 -21°	200/48 -37°	230/63 -40°	240/71 -47°
RAP	used from 747 nm out; 81 nm from the line		180/23 12°	200/38 13°	210/38 6°	220/28 -10°	230/34 -21°	230/37 -36°	250/52 -38°	250/59 -46°
PIR	used from 846 nm out; 63 nm from the line		170/22 19°	190/25 13°	210/32 6°	240/23 -9°	250/32 -21°	250/38 -36°	260/44 -40°	260/52 -47°
FSD	used from 996 nm out; 75 nm from the line	190/9	230/30 18°	240/23 13°	240/20 6°	260/22 -9°	250/31 -21°	250/43 -36°	260/49 -43°	270/53 -47°
MCW	used from 1195 nm out; 47 nm from the line	220/44	250/30 17°	230/14 12°	240/17 6°	250/22 -8°	270/29 -20°	250/34 -34°	260/52 -43°	260/59 -51°
DBQ	used from 1295 nm out; 68 nm from the line	230/33	250/30 16°	280/15 9°	260/15 5°	260/21 -7°	260/24 -20°	250/37 -33°	270/42 -43°	280/63 -52°
BRL	used from 1394 nm out; 54 nm from the line	230/24	240/29 15°	290/16 10°	280/15 4°	260/23 -7°	260/32 -19°	260/36 -33°	280/48 -41°	280/59 -52°
JOT	used from 1444 nm out; 57 nm from the line	250/23	270/22 15°	250/16 10°	240/9 4°	280/22 -7°	280/29 -19°	300/29 -34°	290/50 -43°	300/64 -52°
IND	used from 1544 nm out; 49 nm from the line	290/16	310/20 16°	320/21 10°	330/13 3°	300/25 -7°	320/32 -19°	330/46 -34°	320/61 -43°	320/63 -50°
CVG	used from 1643 nm out; 35 nm from the line	320/18	350/32 16°	350/35 10°	350/30 3°	330/30 -7°	340/44 -20°	340/58 -35°	330/72 -41°	320/36 -49°

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	calm	10+ mi	none	21 ft	10:53 pm PDT (05:53 UTC)
MWH Moses Lake, WA	120 nm out, 10 nm south of the line, tower	VFR Sky: overcast at 12,000 feet	from the north-northwest (330°) at 4 knots	10+ mi	12,000 ft	1,188 ft	05:52 UTC
MSO Missoula, MT	339 nm out, 2 nm northwest of the line, tower	VFR Sky: overcast at 5,500 feet Weather: light rain	calm	10+ mi	5,500 ft	3,205 ft	05:53 UTC
HLN Helena, MT	428 nm out, 4 nm southwest of the line, tower	VFR Sky: a few clouds at 2,100 feet, overcast at 5,000 feet	from the west (270°) at 8 knots	10+ mi	5,000 ft	3,877 ft	05:53 UTC
BIL Billings, MT	578 nm out, 19 nm south of the line, tower	marginal VFR Sky: overcast at 1,200 feet Weather: light rain, light snow, mist	from the north-northwest (340°) at 6 knots	3 mi	1,200 ft	3,662 ft	05:53 UTC
PIR Pierre, SD	936 nm out, 2 nm southwest of the line	IFR Sky: overcast at 800 feet	from the northeast (050°) at 8 knots	10+ mi	800 ft	1,744 ft	05:53 UTC
FSD Sioux Falls, SD	1095 nm out, 7 nm north of the line, tower	VFR	from the north-northeast (020°) at 7 knots	10+ mi	none	1,430 ft	05:56 UTC
CID Cedar Rapids, IA	1334 nm out, 5 nm east of the line, tower	VFR	from the south (180°) at 6 knots	10+ mi	none	869 ft	02:52 UTC
MLI Moline, IL	1394 nm out, 5 nm east of the line, tower	VFR	from the south (190°) at 9 knots	10+ mi	none	589 ft	05:52 UTC
IND Indianapolis, IN	1613 nm out, 5 nm southeast of the line, tower	VFR	from the southeast (140°) at 4 knots	8 mi	none	796 ft	05:54 UTC
CVG Covington, KY	destination	VFR	from the west (260°) at 4 knots	7 mi	none	896 ft	1:52 am EDT (05:52 UTC)

The highest airport on this list sits at 3,877 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At CVG when you get there the forecast at the estimated arrival, 12:41 pm EDT (16:41 UTC)

Wind from the southwest at 9 knots, visibility more than 6 miles, scattered clouds at 25,000 feet VFR

The whole forecast for CVG

From Mon 2:00 am EDT (06:00 UTC): wind light and variable, visibility 3 miles, mist, clear skies
From Mon 4:00 am EDT (08:00 UTC): wind light and variable, visibility 1 mile, mist, scattered clouds at 200 feet
At times between Mon 5:00 am EDT (09:00 UTC) and 9:00 am EDT (13:00 UTC): visibility ½ mile, fog, sky obscured at 200 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the southwest at 9 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 8:00 pm EDT (00:00 UTC): wind from the south-southwest at 7 knots, visibility more than 6 miles, scattered clouds at 25,000 feet

The forecast for BFI, the departure

From Sun 11:00 pm PDT (06:00 UTC): wind calm, visibility more than 6 miles, clear skies
From Mon 3:00 am PDT (10:00 UTC): wind calm, 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
From Mon 7:00 pm PDT (02:00 UTC): wind calm, visibility more than 6 miles, clear skies

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

6/8029 Cincinnati, OH, Friday, October 9, 2026 through Monday, October 12, 2026 Local on the route, at the destination end · a VIP movement · until 12 October · ZID

Daylight

Sunset at BFI 6:27 pm PDT (01:27 UTC), at CVG 7:04 pm EDT (23:04 UTC) (civil twilight ends 7:31 pm EDT (23:31 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, Cincinnati/Northern Kentucky International.