Plan a flight · Mon 4:01 am PDT (11:01 UTC)

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

1,747 nautical miles (2,011 statute miles) east on a straight line, true course 090°, about 075° 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 45-knot tailwind), arriving about 5:36 pm EDT (21:36 UTC). Right now BFI is VFR, wind calm; CMH is IFR, 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: 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 TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 30 to 369 nm out.
AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 190 to 629 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 220 to 569 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 1138 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 639 to 729 nm out.
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 1268 to 1298 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 150 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

CRJ2 at 5,500 ft, 4 nm north, 2:45 am PDT (09:45 UTC): mist. 1627 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
CRJ7 at 3,000 ft, 34 nm southwest, 3:08 am PDT (10:08 UTC): a routine report with nothing remarked on. At the destination end, 34 nm southwest of the line.
as filed, and in English
```
CMH UA /OV DAY/TM 1008/FL030/TP CRJ7/SK TOP015
```
Report
a routine report filed through CMH
Where
over DAY
Time
10:08 UTC
Height
at 3,000 ft
Aircraft
CRJ7
Sky
TOP015
A21N at 33,000 ft, 10 nm southwest, 1:07 am PDT (08:07 UTC): light chop turbulence. At the destination 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
E75L at 21,000 ft, 46 nm east, 3:23 am PDT (10:23 UTC): clear from 21,000 ft to 60,000 ft. At the destination end, 46 nm east of the line.
as filed, and in English
```
ZZV UA /OV ZZV/TM 1023/FL210/TP E75L/SK SKC
```
Report
a routine report filed through ZZV
Where
over ZZV
Time
10:23 UTC
Height
at 21,000 ft
Aircraft
E75L
Sky
clear
E170 at 6,000 ft, 0 nm southwest, 3:00 am PDT (10:00 UTC): remarks: during the climb. At the destination end, 0 nm southwest of the line.
as filed, and in English
```
CMH UA /OV CMH/TM 1000/FL060/TP E170/SK B008-TOP031/RM DURC
```
Report
a routine report filed through CMH
Where
over CMH
Time
10:00 UTC
Height
at 6,000 ft
Aircraft
E170
Sky
B008-TOP031
Remarks
during the climb
B737 at 39,000 ft, 17 nm northeast, 1:40 am PDT (08:40 UTC): light chop turbulence. At the destination 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

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 16 forecast points nearest it (SEA, YKM, GEG, GPI, GTF, BIL, MLS, DIK, PIR, ABR, FSD, MCW, DBQ, JOT, FWA, CMH). 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	250° at 17 kt	−13 kt		133 kt	13 h 08 min	8:09 pm EDT (00:09 UTC)
5,500 ft	260° at 10 kt	−9 kt	2 °C	129 kt	13 h 33 min	8:34 pm EDT (00:34 UTC)
7,500 ft	250° at 11 kt	−9 kt	8 °C	129 kt	13 h 33 min	8:34 pm EDT (00:34 UTC)
9,500 ft	240° at 13 kt	−9 kt	4 °C	129 kt	13 h 33 min	8:34 pm EDT (00:34 UTC)
11,500 ft	250° at 15 kt	−11 kt	1 °C	131 kt	13 h 20 min	8:21 pm EDT (00:21 UTC)
13,500 ft	250° at 16 kt	−12 kt	-3 °C	132 kt	13 h 14 min	8:15 pm EDT (00:15 UTC)
15,500 ft	250° at 16 kt	−13 kt	-7 °C	133 kt	13 h 08 min	8:09 pm EDT (00:09 UTC)
17,500 ft	250° at 16 kt	−13 kt	-11 °C	133 kt	13 h 08 min	8:09 pm EDT (00:09 UTC)
18,000 ft FL180	250° at 17 kt	−13 kt	-12 °C	133 kt	13 h 08 min	8:09 pm EDT (00:09 UTC)
24,000 ft FL240	250° at 24 kt	−18 kt	-24 °C	138 kt	12 h 40 min	7:41 pm EDT (23:41 UTC)
30,000 ft FL300	250° at 27 kt	−23 kt	-36 °C	143 kt	12 h 13 min	7:14 pm EDT (23:14 UTC)
34,000 ft FL340	260° at 38 kt	−34 kt	-40 °C	154 kt	11 h 21 min	6:22 pm EDT (22:22 UTC)
39,000 ft FL390	260° at 48 kt	−45 kt	-46 °C	165 kt	10 h 35 min	5:36 pm EDT (21:36 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; 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°
YKM	used from 50 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°
GEG	used from 100 nm out; 69 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°
GPI	used from 250 nm out; 80 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°
GTF	used from 349 nm out; 74 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°
BIL	used from 499 nm out; 70 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°
MLS	used from 599 nm out; 51 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°
DIK	used from 749 nm out; 63 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°
PIR	used from 849 nm out; 79 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°
ABR	used from 949 nm out; 37 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°
FSD	used from 1048 nm out; 55 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°
MCW	used from 1148 nm out; 73 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°
DBQ	used from 1298 nm out; 49 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°
JOT	used from 1448 nm out; 32 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°
FWA	used from 1548 nm out; 54 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°
CMH	used from 1697 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°

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	3:53 am PDT (10:53 UTC)
MWH Moses Lake, WA	120 nm out, 16 nm south of the line, tower	VFR	from the north-northwest (340°) at 6 knots	10+ mi	none	1,188 ft	10:52 UTC
GEG Spokane, WA	190 nm out, 13 nm north of the line, tower	VFR Sky: a few clouds at 5,000 feet, scattered clouds at 8,500 feet, a broken layer at 10,000 feet	from the northeast (040°) at 6 knots	10+ mi	10,000 ft	2,385 ft	10:53 UTC
LWT Lewistown, MT	519 nm out, 17 nm north of the line	no report just now				4,170 ft
MLS Miles City, MT	679 nm out, 10 nm north of the line	IFR Sky: overcast at 800 feet Weather: mist	from the north (350°) at 8 knots	5 mi	800 ft	2,634 ft	10:53 UTC
HEI Hettinger, ND	809 nm out, 16 nm north of the line	low IFR Sky: overcast at 300 feet Weather: mist	from the northeast (040°) at 8 knots	2 mi	300 ft	2,705 ft	10:53 UTC
MBG Mobridge, SD	909 nm out, 14 nm north of the line	marginal VFR Sky: a few clouds at 600 feet, overcast at 1,400 feet Weather: nearby thunderstorms, light rain	from the east-northeast (060°) at 8 knots	10+ mi	1,400 ft	1,716 ft	10:52 UTC
TKC Tracy, MN	1128 nm out, 3 nm north of the line	low IFR Sky: overcast at 200 feet Weather: fog	from the north-northwest (330°) at 7 knots	0.25 mi	200 ft	1,335 ft	10:55 UTC
DBQ Dubuque, IA	1368 nm out, 23 nm southwest of the line, tower	VFR	from the south-southwest (200°) at 8 knots	10+ mi	none	1,076 ft	10:53 UTC
MDW Chicago, IL	1498 nm out, 5 nm southeast of the line, tower	VFR Sky: a broken layer at 25,000 feet	from the south-southwest (210°) at 7 knots	10+ mi	25,000 ft	619 ft	10:53 UTC
FWA Fort Wayne, IN	1627 nm out, 4 nm north of the line, tower	IFR Sky: scattered clouds at 30,000 feet Weather: mist, shallow fog	from the south (180°) at 4 knots	2 mi	none	814 ft	10:54 UTC
CMH Columbus, OH	destination	IFR Sky: a broken layer at 700 feet, overcast at 1,200 feet	calm	10+ mi	700 ft	815 ft	6:51 am EDT (10:51 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 CMH when you get there the forecast at the estimated arrival, 5:36 pm EDT (21:36 UTC)

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

The whole forecast for CMH

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

The forecast for BFI, the departure

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

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

6/8923 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local on the route, 320 nm along the route · a VIP movement · starts Wednesday 14 October · ZLC
6/8925 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local on the route, 320 nm along the route · a VIP movement · starts Wednesday 14 October · ZOB

Daylight

Sunset at BFI 6:25 pm PDT (01:25 UTC), at CMH 6:56 pm EDT (22:56 UTC) (civil twilight ends 7:24 pm EDT (23:24 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, John Glenn Columbus International.