Plan a flight · Mon 6:03 am EDT (10:03 UTC)

John Glenn Columbus International to Boeing Fld/King County International CMH → BFI

1,747 nautical miles (2,011 statute miles) northwest on a straight line, true course 298°, about 305° magnetic at the departure end (variation 7W). At 120 knots that is 15 h 36 min at the quickest height in today's winds (4,500 ft, a 8-knot headwind), arriving about 6:39 pm PDT (01:39 UTC), after sunset at the destination. Right now CMH is marginal VFR, wind from the west-northwest (290°) at 6 knots; BFI is VFR, wind from the south (180°) at 3 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: 4 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 SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist, fog). Over the first 170 nm of 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 349 to 559 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 609 to 1498 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). Near the route, 988 nm along the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 998 to 1078 nm out.
AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 1098 to 1578 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1178 to 1488 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 389 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 CMH.

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

B737 at 39,000 ft, 17 nm northeast, 4:40 am EDT (08:40 UTC): light chop turbulence. At the departure end, 17 nm northeast of the line.
as filed, and in English
```
CMH UA /OV APE/TM 0840/FL390/TP B737/TB CONS LGT CHOP 390 NEG 350-330
```
Report
a routine report filed through CMH
Where
over APE
Time
08:40 UTC
Height
at 39,000 ft
Aircraft
B737
Turbulence
continuous light chop at 39,000 ft no from 35,000 ft to 33,000 ft
A21N at 33,000 ft, 10 nm southwest, 4:07 am EDT (08:07 UTC): light chop turbulence. At the departure end, 10 nm southwest of the line.
as filed, and in English
```
DAY UA /OV ROD/TM 0807/FL330/TP A21N/TB OCNL LT CHOP
```
Report
a routine report filed through DAY
Where
over ROD
Time
08:07 UTC
Height
at 33,000 ft
Aircraft
A21N
Turbulence
occasional lt chop
CRJ2 at 5,500 ft, 4 nm north, 5:45 am EDT (09:45 UTC): mist. 120 nm along the route, 4 nm north of the line.
as filed, and in English
```
FWA UA /OV FWA/TM 0945/FL055/TP CRJ2/WX MIST
```
Report
a routine report filed through FWA
Where
over FWA
Time
09:45 UTC
Height
at 5,500 ft
Aircraft
CRJ2
Weather
shallow st
B77W at 30,000 ft, 32 nm northeast, 4:00 am EDT (08:00 UTC): light to moderate chop turbulence. 759 nm along the route, 32 nm northeast of the line.
as filed, and in English
```
ABR UA /OV ABR/TM 0800/FL300/TP B77W/TB LGT-MOD CHOP
```
Report
a routine report filed through ABR
Where
over ABR
Time
08:00 UTC
Height
at 30,000 ft
Aircraft
B77W
Turbulence
light to moderate chop

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 16 forecast points nearest it (CMH, FWA, JOT, DBQ, MCW, FSD, ABR, PIR, DIK, MLS, BIL, GTF, GPI, GEG, 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	260° at 10 kt	+8 kt	2 °C	112 kt	15 h 36 min	6:39 pm PDT (01:39 UTC)
6,500 ft	260° at 10 kt	+9 kt	9 °C	111 kt	15 h 44 min	6:47 pm PDT (01:47 UTC)
8,500 ft	250° at 12 kt	+8 kt	6 °C	112 kt	15 h 36 min	6:39 pm PDT (01:39 UTC)
10,500 ft	250° at 14 kt	+10 kt	2 °C	110 kt	15 h 53 min	6:56 pm PDT (01:56 UTC)
12,500 ft	250° at 16 kt	+12 kt	-1 °C	108 kt	16 h 11 min	7:14 pm PDT (02:14 UTC)
14,500 ft	250° at 16 kt	+12 kt	-5 °C	108 kt	16 h 11 min	7:14 pm PDT (02:14 UTC)
16,500 ft	250° at 16 kt	+13 kt	-9 °C	107 kt	16 h 20 min	7:23 pm PDT (02:23 UTC)
18,000 ft FL180	250° at 17 kt	+13 kt	-12 °C	107 kt	16 h 20 min	7:23 pm PDT (02:23 UTC)
24,000 ft FL240	250° at 24 kt	+18 kt	-24 °C	102 kt	17 h 08 min	8:11 pm PDT (03:11 UTC)
30,000 ft FL300	250° at 27 kt	+22 kt	-36 °C	98 kt	17 h 50 min	8:53 pm PDT (03:53 UTC)
34,000 ft FL340	260° at 38 kt	+33 kt	-40 °C	87 kt	20 h 05 min	11:08 pm PDT (06:08 UTC)
39,000 ft FL390	260° at 48 kt	+45 kt	-46 °C	75 kt	23 h 18 min	2:21 am PDT (09:21 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
CMH	used from 0 nm out; 25 nm from the line	320/12	340/26 15°	340/22 9°	320/24 3°	320/32 -7°	320/36 -20°	330/42 -35°	320/59 -44°	320/57 -50°
FWA	used from 50 nm out; 46 nm from the line	270/20	300/16 15°	290/14 10°	280/17 3°	290/25 -7°	280/30 -19°	280/34 -35°	290/48 -44°	300/64 -52°
JOT	used from 200 nm out; 40 nm from the line	250/25	260/22 14°	250/17 9°	270/21 5°	280/28 -8°	280/36 -20°	270/41 -35°	280/57 -42°	290/65 -50°
DBQ	used from 300 nm out; 61 nm from the line	250/27	260/23 17°	240/26 10°	260/30 4°	280/26 -9°	280/36 -21°	270/41 -36°	280/52 -41°	290/67 -48°
MCW	used from 449 nm out; 39 nm from the line	250/36	250/24 19°	240/26 11°	250/30 5°	270/22 -9°	260/30 -21°	260/31 -36°	280/53 -38°	280/66 -48°
FSD	used from 599 nm out; 59 nm from the line	210/20	230/23 21°	220/25 14°	230/30 5°	230/26 -9°	240/30 -21°	270/33 -36°	260/47 -37°	270/58 -47°
ABR	used from 699 nm out; 46 nm from the line	080/12	210/12 17°	220/22 12°	230/26 5°	220/28 -10°	230/41 -21°	250/36 -36°	260/47 -39°	260/63 -47°
PIR	used from 799 nm out; 53 nm from the line		230/15 15°	220/22 14°	220/24 6°	200/32 -10°	210/48 -22°	240/45 -33°	240/43 -37°	250/55 -46°
DIK	used from 899 nm out; 68 nm from the line		190/12 5°	230/29 7°	220/33 1°	220/43 -11°	210/47 -23°	220/53 -33°	240/56 -40°	250/72 -47°
MLS	used from 998 nm out; 50 nm from the line		290/17 -1°	250/18 0°	230/25 0°	220/31 -11°	220/32 -24°	220/50 -32°	220/60 -38°	230/71 -46°
BIL	used from 1148 nm out; 49 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°
GTF	used from 1248 nm out; 45 nm from the line		L/V	L/V -7°	240/8 -8°	240/30 -14°	240/40 -28°	210/52 -38°	210/76 -38°	220/72 -43°
GPI	used from 1398 nm out; 65 nm from the line		090/8 -4°	140/7 -7°	090/10 -8°	110/10 -19°	210/25 -30°	200/24 -40°	210/31 -39°	210/35 -42°
GEG	used from 1498 nm out; 34 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°
YKM	used from 1647 nm out; 56 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 1697 nm out; 26 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
CMH Columbus, OH	departure	marginal VFR Sky: overcast at 1,300 feet	from the west-northwest (290°) at 6 knots	9 mi	1,300 ft	815 ft	5:51 am EDT (09:51 UTC)
FWA Fort Wayne, IN	120 nm out, 4 nm north of the line, tower	IFR Sky: scattered clouds at 30,000 feet Weather: mist, shallow fog	from the south-southwest (210°) at 6 knots	2.5 mi	none	814 ft	09:54 UTC
MDW Chicago, IL	250 nm out, 5 nm southeast of the line, tower	VFR Sky: a broken layer at 25,000 feet	from the south-southwest (210°) at 8 knots	10+ mi	25,000 ft	619 ft	09:53 UTC
DBQ Dubuque, IA	379 nm out, 23 nm southwest of the line, tower	VFR	from the south-southwest (200°) at 8 knots	10+ mi	none	1,076 ft	09:53 UTC
TKC Tracy, MN	619 nm out, 3 nm north of the line	low IFR Sky: overcast at 200 feet Weather: fog	from the northwest (310°) at 7 knots	0.25 mi	200 ft	1,335 ft	09:55 UTC
MBG Mobridge, SD	839 nm out, 14 nm north of the line	IFR Sky: overcast at 500 feet Weather: thunderstorms, mist	from the northwest (310°) at 5 knots	3 mi	500 ft	1,716 ft	09:52 UTC
HEI Hettinger, ND	939 nm out, 16 nm north of the line	low IFR Sky: overcast at 300 feet Weather: mist	from the northeast (050°) at 5 knots	2 mi	300 ft	2,705 ft	09:53 UTC
MLS Miles City, MT	1068 nm out, 10 nm north of the line	IFR Sky: overcast at 500 feet Weather: light rain, mist	from the north (360°) at 8 knots	2.5 mi	500 ft	2,634 ft	09:53 UTC
LWT Lewistown, MT	1228 nm out, 17 nm north of the line	no report just now				4,170 ft
GEG Spokane, WA	1558 nm out, 13 nm north of the line, tower	VFR Sky: scattered clouds at 8,000 feet, a broken layer at 11,000 feet	from the northeast (050°) at 7 knots	10+ mi	11,000 ft	2,385 ft	09:53 UTC
MWH Moses Lake, WA	1627 nm out, 16 nm south of the line, tower	VFR	from the north-northeast (020°) at 3 knots	10+ mi	none	1,188 ft	09:52 UTC
BFI Seattle, WA	destination	VFR	from the south (180°) at 3 knots	10+ mi	none	21 ft	2:53 am PDT (09:53 UTC)

The highest airport on this list sits at 4,170 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, 6:39 pm PDT (01:39 UTC)

Wind from the west at 5 knots, 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 CMH, the departure

From Mon 2:00 am EDT (06:00 UTC): wind from the west-northwest at 6 knots, visibility more than 6 miles, overcast at 1,200 feet
From Mon 4:00 am EDT (08:00 UTC): wind from the west at 4 knots, visibility 4 miles, mist, overcast at 800 feet
At times between Mon 6:00 am EDT (10:00 UTC) and 9:00 am EDT (13:00 UTC): visibility 2 miles, mist, scattered clouds at 800 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 at 5 knots, visibility more than 6 miles, a few clouds at 10,000 feet, scattered clouds at 25,000 feet

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 CMH 6:56 pm EDT (22:56 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 central Great Lakes · loop National Weather Service

Radar now, the upper Mississippi valley · 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: John Glenn Columbus International, Boeing Fld/King County International.