Seattle-Tacoma International to John Glenn Columbus International SEA → CMH
1,748 nautical miles (2,011 statute miles) east on a straight line, true course 090°, about 074° magnetic at the departure end (variation 16E). At 120 knots that is 10 h 43 min at the quickest height in today's winds (39,000 ft, a 43-knot tailwind), arriving about 1:26 pm EDT (17:26 UTC). Right now SEA is VFR, wind from the east-southeast (110°) at 6 knots; CMH is marginal VFR, wind from the north-northwest (330°) at 8 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: 929 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
- SIGMET C11C: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the southwest at 40 knots, until 12:55 am PDT (07:55 UTC). Near the route, 809 nm along the route.
as issued
WSUS32 KKCI 120555 MKCC WST 120555 CONVECTIVE SIGMET 11C VALID UNTIL 0755Z SD WY FROM 60WNW DPR-20SSE DPR-40SSW RAP-60W RAP-60WNW DPR DMSHG AREA TS MOV FROM 22040KT. TOPS TO FL310.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 180 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 120 to 619 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 240 to 549 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 270 to 1119 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 270 to 459 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 629 to 689 nm out.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Near the route, 699 nm along the route.
- 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, 739 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 1218 to 1398 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 220 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 SEA.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- LJ45 at 10,000 ft, 13 nm northeast, 9:31 pm PDT (04:31 UTC): no turbulence, clear, remarks: ground fog at fwa FV10SM on final runway 14. 1608 nm along the route, 13 nm northeast of the line.
as filed, and in English
FWA UA /OV OLK/TM 0431/FL100/TP LJ45/SK CLR/TB SMOOTH/RM GROUND FOG AT FWA. FV10SM ON FINAL RY 14
- Report
- a routine report filed through FWA
- Where
- over OLK
- Time
- 04:31 UTC
- Height
- at 10,000 ft
- Aircraft
- LJ45
- Sky
- clear
- Turbulence
- smooth
- Remarks
- ground fog at fwa FV10SM on final runway 14
- MD83 climbing, 11 nm south, 10:04 pm PDT (05:04 UTC): a routine report with nothing remarked on. At the destination end, 11 nm south of the line.
as filed, and in English
CMH UA /OV LCK/TM 0504/FLDURC/TP MD83/SK B010 T037
- Report
- a routine report filed through CMH
- Where
- over LCK
- Time
- 05:04 UTC
- Height
- during the climb
- Aircraft
- MD83
- Sky
- B010 T037
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, 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 | 240° at 13 kt | −8 kt | 128 kt | 13 h 39 min | 4:22 pm EDT (20:22 UTC) | |
| 5,500 ft | 210° at 5 kt | −1 kt | 4 °C | 121 kt | 14 h 27 min | 5:10 pm EDT (21:10 UTC) |
| 7,500 ft | 220° at 5 kt | −2 kt | 8 °C | 122 kt | 14 h 20 min | 5:03 pm EDT (21:03 UTC) |
| 9,500 ft | 230° at 6 kt | −3 kt | 4 °C | 123 kt | 14 h 13 min | 4:56 pm EDT (20:56 UTC) |
| 11,500 ft | 230° at 11 kt | −5 kt | 1 °C | 125 kt | 13 h 59 min | 4:42 pm EDT (20:42 UTC) |
| 13,500 ft | 230° at 13 kt | −8 kt | -3 °C | 128 kt | 13 h 39 min | 4:22 pm EDT (20:22 UTC) |
| 15,500 ft | 240° at 16 kt | −11 kt | -7 °C | 131 kt | 13 h 21 min | 4:04 pm EDT (20:04 UTC) |
| 17,500 ft | 240° at 18 kt | −14 kt | -10 °C | 134 kt | 13 h 03 min | 3:46 pm EDT (19:46 UTC) |
| 18,000 ft FL180 | 240° at 19 kt | −15 kt | -11 °C | 135 kt | 12 h 57 min | 3:40 pm EDT (19:40 UTC) |
| 24,000 ft FL240 | 250° at 21 kt | −17 kt | -23 °C | 137 kt | 12 h 46 min | 3:29 pm EDT (19:29 UTC) |
| 30,000 ft FL300 | 250° at 24 kt | −21 kt | -36 °C | 141 kt | 12 h 24 min | 3:07 pm EDT (19:07 UTC) |
| 34,000 ft FL340 | 260° at 36 kt | −35 kt | -41 °C | 155 kt | 11 h 17 min | 2:00 pm EDT (18:00 UTC) |
| 39,000 ft FL390 | 260° at 44 kt | −43 kt | -47 °C | 163 kt | 10 h 43 min | 1:26 pm EDT (17:26 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; 70 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 250 nm out; 79 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 300 nm out; 69 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 350 nm out; 76 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 499 nm out; 68 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 599 nm out; 52 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° | |
| DIK | used from 749 nm out; 66 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° | |
| PIR | used from 849 nm out; 78 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° | |
| ABR | used from 949 nm out; 39 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° |
| FSD | used from 1049 nm out; 53 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 1148 nm out; 73 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 1298 nm out; 49 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° |
| JOT | used from 1448 nm out; 31 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° |
| FWA | used from 1548 nm out; 54 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° |
| CMH | used from 1698 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° |
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 |
|---|---|---|---|---|---|---|---|
| SEA Seattle, WA | departure | VFR | from the east-southeast (110°) at 6 knots | 10+ mi | none | 432 ft | 10:53 pm PDT (05:53 UTC) |
| MWH Moses Lake, WA | 120 nm out, 12 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 | 340 nm out, 14 nm south of the line, tower | VFR Sky: a few clouds at 1,700 feet, overcast at 6,000 feet | calm | 10+ mi | 6,000 ft | 3,205 ft | 06:07 UTC |
| HLN Helena, MT | 429 nm out, 22 nm south 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 |
| RPX Roundup, MT | 569 nm out, 7 nm southwest of the line | no report just now | 3,490 ft | ||||
| LEM Lemmon, SD | 839 nm out, 19 nm north of the line | no report just now | 2,572 ft | ||||
| MBG Mobridge, SD | 909 nm out, 16 nm north of the line | IFR Sky: a broken layer at 800 feet, overcast at 1,200 feet | from the north-northeast (030°) at 9 knots | 7 mi | 800 ft | 1,716 ft | 06:21 UTC |
| TKC Tracy, MN | 1128 nm out, 5 nm north of the line | VFR | from the northwest (310°) at 4 knots | 10+ mi | none | 1,335 ft | 06:35 UTC |
| DBQ Dubuque, IA | 1368 nm out, 22 nm southwest of the line, tower | VFR | from the south-southwest (200°) at 9 knots | 10+ mi | none | 1,076 ft | 05:53 UTC |
| GYY Gary/Chicago, IN | 1518 nm out, 5 nm south of the line, tower | VFR | from the south (190°) at 6 knots | 10+ mi | none | 596 ft | 06:35 UTC |
| FWA Fort Wayne, IN | 1628 nm out, 4 nm north of the line, tower | marginal VFR Weather: mist, shallow fog | from the south (180°) at 4 knots | 5 mi | none | 814 ft | 05:54 UTC |
| CMH Columbus, OH | destination | marginal VFR Sky: overcast at 1,400 feet | from the north-northwest (330°) at 8 knots | 10+ mi | 1,400 ft | 815 ft | 1:51 am EDT (05:51 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 CMH when you get there the forecast at the estimated arrival, 1:26 pm EDT (17:26 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 SEA, the departure
- From Sun 11:00 pm PDT (06:00 UTC): wind from the east-northeast at 6 knots, visibility more than 6 miles, clear skies
- From Mon 3:00 am PDT (10:00 UTC): wind from the southeast at 4 knots, 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 4 knots, visibility more than 6 miles, clear skies
- From Mon 11:00 am PDT (18:00 UTC): wind from the west at 6 knots, visibility more than 6 miles, clear skies
- From Mon 8:00 pm PDT (03:00 UTC): wind from the south at 4 knots, visibility more than 6 miles, 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 SEA 6:27 pm PDT (01:27 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







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: Seattle-Tacoma International, John Glenn Columbus International.
