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 14 h 26 min at the quickest height in today's winds (4,500 ft, a 1-knot tailwind), arriving about 2:34 pm PDT (21:34 UTC). 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). Over the first 220 nm of 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 349 to 519 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 629 to 1488 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, 1008 nm along the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Near the route, 1048 nm along the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 1068 to 1118 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 1128 to 1617 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1198 to 1498 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 1288 to 1478 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 180 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
Not fetched just now.
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 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 | 200° at 6 kt | −1 kt | 3 °C | 121 kt | 14 h 26 min | 2:34 pm PDT (21:34 UTC) |
| 6,500 ft | 220° at 5 kt | +1 kt | 9 °C | 119 kt | 14 h 41 min | 2:49 pm PDT (21:49 UTC) |
| 8,500 ft | 220° at 5 kt | +2 kt | 7 °C | 118 kt | 14 h 48 min | 2:56 pm PDT (21:56 UTC) |
| 10,500 ft | 230° at 9 kt | +4 kt | 2 °C | 116 kt | 15 h 04 min | 3:12 pm PDT (22:12 UTC) |
| 12,500 ft | 230° at 12 kt | +6 kt | -1 °C | 114 kt | 15 h 19 min | 3:27 pm PDT (22:27 UTC) |
| 14,500 ft | 240° at 14 kt | +9 kt | -5 °C | 111 kt | 15 h 44 min | 3:52 pm PDT (22:52 UTC) |
| 16,500 ft | 240° at 17 kt | +12 kt | -8 °C | 108 kt | 16 h 11 min | 4:19 pm PDT (23:19 UTC) |
| 18,000 ft FL180 | 240° at 19 kt | +15 kt | -11 °C | 105 kt | 16 h 38 min | 4:46 pm PDT (23:46 UTC) |
| 24,000 ft FL240 | 250° at 21 kt | +17 kt | -23 °C | 103 kt | 16 h 58 min | 5:06 pm PDT (00:06 UTC) |
| 30,000 ft FL300 | 250° at 25 kt | +21 kt | -36 °C | 99 kt | 17 h 39 min | 5:47 pm PDT (00:47 UTC) |
| 34,000 ft FL340 | 260° at 37 kt | +35 kt | -41 °C | 85 kt | 20 h 33 min | 8:41 pm PDT (03:41 UTC) |
| 39,000 ft FL390 | 260° at 44 kt | +43 kt | -47 °C | 77 kt | 22 h 41 min | 10:49 pm PDT (05:49 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| CMH | used from 0 nm out; 25 nm from the line | 330/15 | 340/22 14° | 340/24 9° | 340/23 4° | 340/35 -9° | 340/49 -20° | 340/58 -37° | 330/70 -42° | 340/55 -47° |
| FWA | used from 50 nm out; 46 nm from the line | 300/17 | 320/20 16° | 330/20 10° | 340/15 3° | 310/27 -8° | 320/37 -20° | 330/52 -36° | 330/65 -43° | 330/60 -50° |
| JOT | used from 200 nm out; 40 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° |
| DBQ | used from 300 nm out; 61 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° |
| MCW | used from 449 nm out; 39 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° |
| FSD | used from 599 nm out; 59 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° |
| ABR | used from 699 nm out; 46 nm from the line | 070/14 | 250/10 17° | 270/16 11° | 260/28 5° | 260/36 -10° | 260/41 -22° | 270/33 -37° | 260/42 -42° | 260/50 -48° |
| PIR | used from 799 nm out; 53 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° | |
| DIK | used from 899 nm out; 68 nm from the line | 150/24 7° | 200/38 6° | 220/53 0° | 230/51 -9° | 230/49 -21° | 240/37 -37° | 240/47 -44° | 250/65 -48° | |
| MLS | used from 998 nm out; 50 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° | |
| BIL | used from 1148 nm out; 49 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° | |
| GTF | used from 1248 nm out; 45 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° | |
| GPI | used from 1398 nm out; 65 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° | |
| GEG | used from 1498 nm out; 34 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° | |
| YKM | used from 1647 nm out; 56 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° |
| SEA | used from 1697 nm out; 26 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° |
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 | no report just now | 815 ft | ||||
| FWA Fort Wayne, IN | 120 nm out, 4 nm north of the line, tower | no report just now | 814 ft | ||||
| MDW Chicago, IL | 250 nm out, 5 nm southeast of the line, tower | no report just now | 619 ft | ||||
| DBQ Dubuque, IA | 379 nm out, 23 nm southwest of the line, tower | no report just now | 1,076 ft | ||||
| TKC Tracy, MN | 619 nm out, 3 nm north of the line | no report just now | 1,335 ft | ||||
| MBG Mobridge, SD | 839 nm out, 14 nm north of the line | no report just now | 1,716 ft | ||||
| HEI Hettinger, ND | 939 nm out, 16 nm north of the line | no report just now | 2,705 ft | ||||
| MLS Miles City, MT | 1068 nm out, 10 nm north of the line | no report just now | 2,634 ft | ||||
| 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 | no report just now | 2,385 ft | ||||
| MWH Moses Lake, WA | 1627 nm out, 16 nm south of the line, tower | no report just now | 1,188 ft | ||||
| BFI Seattle, WA | destination | no report just now | 21 ft |
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, 2:34 pm PDT (21:34 UTC)
BFI has no terminal forecast; use the nearest airport that does.
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)).
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
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.