Plan a flight · Mon 9:09 am EDT (13:09 UTC)

Wilmington Air Park Airport to Seattle-Tacoma International ILN → SEA

1,727 nautical miles (1,988 statute miles) northwest on a straight line, true course 299°, about 306° magnetic at the departure end (variation 7W). At 120 knots that is 15 h 34 min at the quickest height in today's winds (8,500 ft, a 9-knot headwind), arriving about 9:43 pm PDT (04:43 UTC), after sunset at the destination. Right now ILN is low IFR, wind from the southwest (230°) at 8 knots; SEA is VFR, wind from the southeast (130°) at 5 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: 221 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 130 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 379 to 539 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 1358 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 1008 to 1098 nm out.
AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 1108 to 1538 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1148 to 1518 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 1368 to 1697 nm out.

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 ILN.

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

C650 at 400 ft, 42 nm northeast, 8:50 am EDT (12:50 UTC): overcast above 500 ft, 16 °C, remarks: dept end runway 22 bases reported at 400 ft. At the departure end, 42 nm northeast of the line.
as filed, and in English
```
TZR UA /OV DEPT END RY22/TM 1250/FL004/TP C650/SK OVC005/WX 7/TA 60/RM DEPT END RY22 BASES RPTD 004
```
Report
a routine report filed through TZR
Where
dept end runway 22
Time
12:50 UTC
Height
at 400 ft
Aircraft
C650
Sky
overcast from 500 ft
Weather
7
Temperature
60 °C
Remarks
dept end runway 22 bases reported at 400 ft
CL35 climbing, 49 nm northeast, 7:00 am EDT (11:00 UTC): a routine report with nothing remarked on. At the departure end, 49 nm northeast of the line.
as filed, and in English
```
OSU UA /OV OSU270003/TM 1100/FLDURC/TP CL35/SK B016
```
Report
a routine report filed through OSU
Where
3 nm west (270°) of OSU
Time
11:00 UTC
Height
during the climb
Aircraft
CL35
Sky
B016
E170 at 17,000 ft, 21 nm north, 8:15 am EDT (12:15 UTC): no turbulence, no icing, remarks: very smooth. At the departure end, 21 nm north of the line.
as filed, and in English
```
DAY UA /OV SGH/TM 1215/FL170/TP E170/TB NEG/IC NEG/RM VERY SMOOTH
```
Report
a routine report filed through DAY
Where
over SGH
Time
12:15 UTC
Height
at 17,000 ft
Aircraft
E170
Turbulence
none
Icing
none
Remarks
very smooth
E75S at 100 ft, 42 nm south, 8:57 am EDT (12:57 UTC): sky obscured. At the departure end, 42 nm south of the line.
as filed, and in English
```
CVG UA /OV CVG/TM 1257/FL001/TP E75S/SK VV001
```
Report
a routine report filed through CVG
Where
over CVG
Time
12:57 UTC
Height
at 100 ft
Aircraft
E75S
Sky
sky obscured from 100 ft
CRJ9 climbing, 15 nm northeast, 8:46 am EDT (12:46 UTC): a routine report with nothing remarked on. At the departure end, 15 nm northeast of the line.
as filed, and in English
```
DAY UA /OV DAY/TM 1246/FLDURC/TP CRJ9/SK T014
```
Report
a routine report filed through DAY
Where
over DAY
Time
12:46 UTC
Height
during the climb
Aircraft
CRJ9
Sky
T014
CRJ9 at 1,800 ft, 15 nm northeast, 8:45 am EDT (12:45 UTC): a routine report with nothing remarked on. At the departure end, 15 nm northeast of the line.
as filed, and in English
```
CMH UA /OV DAY/TM 1245/FL018/TP CRJ9/SK T014
```
Report
a routine report filed through CMH
Where
over DAY
Time
12:45 UTC
Height
at 1,800 ft
Aircraft
CRJ9
Sky
T014
B38M climbing, 42 nm south, 8:10 am EDT (12:10 UTC): a routine report with nothing remarked on. At the departure end, 42 nm south of the line.
as filed, and in English
```
CVG UA /OV CVG/TM 1210/FLDURC/TP B38M/SK TOPS 005/WX 1/16SM
```
Report
a routine report filed through CVG
Where
over CVG
Time
12:10 UTC
Height
during the climb
Aircraft
B38M
Sky
tops 500 ft
Weather
1/16SM
C25C , 20 nm south, 8:05 am EDT (12:05 UTC): remarks: hao arrival, had ground contact but no forward visibility. At the departure end, 20 nm south of the line.
as filed, and in English
```
CVG UA /OV HAO/TM 1205/FLDURD/TP C25C/WX NO FORWARD VIS/RM HAO ARRIVAL, HAD GROUND CONTACT BUT NO FORWARD VIS
```
Report
a routine report filed through CVG
Where
over HAO
Time
12:05 UTC
Height
during the descent
Aircraft
C25C
Weather
no, forward, visibility
Remarks
hao arrival, had ground contact but no forward visibility
A320 climbing, 42 nm south, 7:55 am EDT (11:55 UTC): a routine report with nothing remarked on. At the departure end, 42 nm south of the line.
as filed, and in English
```
CVG UA /OV CVG/TM 1155/FLDURC/TP A320/SK TOPS 008
```
Report
a routine report filed through CVG
Where
over CVG
Time
11:55 UTC
Height
during the climb
Aircraft
A320
Sky
tops 800 ft
E75L climbing, 42 nm south, 7:42 am EDT (11:42 UTC): sky obscured. At the departure end, 42 nm south of the line.
as filed, and in English
```
CVG UA /OV CVG/TM 1142/FLDURC/TP E75L/SK VV001
```
Report
a routine report filed through CVG
Where
over CVG
Time
11:42 UTC
Height
during the climb
Aircraft
E75L
Sky
sky obscured from 100 ft
E170 climbing, 42 nm south, 7:18 am EDT (11:18 UTC): a routine report with nothing remarked on. At the departure end, 42 nm south of the line.
as filed, and in English
```
CVG UA /OV CVG/TM 1118/FLDURC/TP E170/SK TOPS 011
```
Report
a routine report filed through CVG
Where
over CVG
Time
11:18 UTC
Height
during the climb
Aircraft
E170
Sky
tops 1,100 ft
B737 at 100 ft, 42 nm south, 6:24 am EDT (10:24 UTC): sky obscured, remarks: runway 36R arrival, bases at clear-air turbulence 3 mins. At the departure end, 42 nm south of the line.
as filed, and in English
```
CVG UA /OV CVG/TM 1024/FL001/TP B737/SK VV001/RM RWY 36R ARRIVAL, BASES AT CAT 3 MINS
```
Report
a routine report filed through CVG
Where
over CVG
Time
10:24 UTC
Height
at 100 ft
Aircraft
B737
Sky
sky obscured from 100 ft
Remarks
runway 36R arrival, bases at clear-air turbulence 3 mins
B739 climbing, 43 nm southwest, 6:19 am EDT (10:19 UTC): a routine report with nothing remarked on. At the departure end, 43 nm southwest of the line.
as filed, and in English
```
CVG UA /OV 1 W CVG/TM 1019/FLDURC/TP B739/SK TOPS 011
```
Report
a routine report filed through CVG
Where
1 west cvg
Time
10:19 UTC
Height
during the climb
Aircraft
B739
Sky
tops 1,100 ft
E75L at 32,000 ft, 40 nm northeast, 8:21 am EDT (12:21 UTC): light chop turbulence, remarks: during the climb. At the departure end, 40 nm northeast of the line.
as filed, and in English
```
DAY UA /OV ROD/TM 1221/FL320/TP E75L/TB CONS LGT CHOP/RM DURC
```
Report
a routine report filed through DAY
Where
over ROD
Time
12:21 UTC
Height
at 32,000 ft
Aircraft
E75L
Turbulence
continuous light chop
Remarks
during the climb

14 more routine reports are on the map.

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 17 forecast points nearest it (CVG, IND, JOT, DBQ, MCW, FSD, ABR, PIR, RAP, MLS, BIL, GTF, GPI, LWS, 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 13 kt	+10 kt	4 °C	110 kt	15 h 42 min	9:51 pm PDT (04:51 UTC)
6,500 ft	260° at 12 kt	+10 kt	9 °C	110 kt	15 h 42 min	9:51 pm PDT (04:51 UTC)
8,500 ft	250° at 13 kt	+9 kt	6 °C	111 kt	15 h 34 min	9:43 pm PDT (04:43 UTC)
10,500 ft	250° at 14 kt	+10 kt	2 °C	110 kt	15 h 42 min	9:51 pm PDT (04:51 UTC)
12,500 ft	250° at 15 kt	+11 kt	-1 °C	109 kt	15 h 51 min	10:00 pm PDT (05:00 UTC)
14,500 ft	250° at 15 kt	+11 kt	-5 °C	109 kt	15 h 51 min	10:00 pm PDT (05:00 UTC)
16,500 ft	250° at 15 kt	+11 kt	-9 °C	109 kt	15 h 51 min	10:00 pm PDT (05:00 UTC)
18,000 ft FL180	250° at 15 kt	+11 kt	-12 °C	109 kt	15 h 51 min	10:00 pm PDT (05:00 UTC)
24,000 ft FL240	250° at 23 kt	+16 kt	-24 °C	104 kt	16 h 36 min	10:45 pm PDT (05:45 UTC)
30,000 ft FL300	250° at 27 kt	+22 kt	-35 °C	98 kt	17 h 37 min	11:46 pm PDT (06:46 UTC)
34,000 ft FL340	260° at 36 kt	+31 kt	-39 °C	89 kt	19 h 24 min	1:33 am PDT (08:33 UTC)
39,000 ft FL390	260° at 45 kt	+41 kt	-46 °C	79 kt	21 h 52 min	4:01 am PDT (11:01 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
CVG	used from 0 nm out; 39 nm from the line	300/19	310/23 15°	320/20 9°	310/18 3°	300/26 -6°	290/36 -19°	310/32 -34°	310/53 -43°	310/61 -51°
IND	used from 50 nm out; 53 nm from the line	270/22	290/19 15°	270/19 8°	270/18 4°	290/28 -7°	280/35 -20°	270/37 -34°	300/51 -42°	300/61 -51°
JOT	used from 150 nm out; 64 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; 40 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 399 nm out; 62 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 549 nm out; 61 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; 66 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 749 nm out; 29 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°
RAP	used from 849 nm out; 80 nm from the line		250/28 16°	260/31 10°	240/25 4°	210/35 -10°	200/45 -23°	230/47 -31°	230/47 -36°	230/51 -46°
MLS	used from 949 nm out; 86 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 1098 nm out; 41 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; 49 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 1348 nm out; 87 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°
LWS	used from 1448 nm out; 60 nm from the line	L/V	340/5 -3°	L/V -6°	040/7 -10°	100/23 -22°	180/30 -31°	190/11 -34°	200/11 -36°	220/23 -40°
GEG	used from 1498 nm out; 26 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 1598 nm out; 58 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; 15 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
ILN Wilmington, OH	departure	low IFR Sky: sky obscured at 100 feet Weather: fog	from the southwest (230°) at 8 knots	0.25 mi	100 ft	1,076 ft	8:54 am EDT (12:54 UTC)
AID Anderson, IN	90 nm out, 5 nm west of the line, tower	VFR	from the south (190°) at 4 knots	10+ mi	none	919 ft	12:15 UTC
IKK Kankakee, IL	210 nm out, 1 nm north of the line	VFR	from the south-southwest (200°) at 4 knots	10+ mi	none	629 ft	12:55 UTC
ALO Waterloo, IA	429 nm out, 5 nm west of the line, tower	VFR	from the south-southeast (160°) at 5 knots	10+ mi	none	873 ft	12:54 UTC
FSD Sioux Falls, SD	629 nm out, 17 nm southwest of the line, tower	VFR Sky: scattered clouds at 10,000 feet, scattered clouds at 25,000 feet	from the north-northeast (030°) at 4 knots	10+ mi	none	1,430 ft	12:56 UTC
MKA Miller, SD	739 nm out, 5 nm north of the line	no report just now				1,569 ft
RPX Roundup, MT	1158 nm out, 10 nm north of the line	no report just now				3,490 ft
HLN Helena, MT	1298 nm out, 9 nm southwest of the line, tower	VFR Sky: overcast at 4,300 feet	from the west (270°) at 7 knots	10+ mi	4,300 ft	3,877 ft	12:53 UTC
MSO Missoula, MT	1388 nm out, 4 nm southwest of the line, tower	VFR Sky: overcast at 7,500 feet	calm	10+ mi	7,500 ft	3,205 ft	12:53 UTC
MWH Moses Lake, WA	1608 nm out, 9 nm south of the line, tower	VFR	from the north-northwest (340°) at 7 knots	10+ mi	none	1,188 ft	12:52 UTC
SEA Seattle, WA	destination	VFR	from the southeast (130°) at 5 knots	10+ mi	none	432 ft	5:53 am PDT (12:53 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 SEA when you get there the forecast at the estimated arrival, 9:43 pm PDT (04:43 UTC)

Wind from the south at 4 knots, visibility more than 6 miles, scattered clouds at 25,000 feet VFR

The whole forecast for SEA

From Mon 5:00 am PDT (12:00 UTC): wind from the southeast at 5 knots, visibility more than 6 miles, clear skies
From Mon 9:00 am PDT (16:00 UTC): wind light and variable, 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
From Tue 4:00 am PDT (11:00 UTC): wind from the south at 5 knots, visibility more than 6 miles, overcast at 10,000 feet

The forecast for ILN, the departure

From Mon 8:00 am EDT (12:00 UTC): wind from the west-southwest at 5 knots, visibility 1 mile, mist, a broken layer at 400 feet
At times between Mon 8:00 am EDT (12:00 UTC) and 10:00 am EDT (14:00 UTC): visibility ¼ mile, fog, sky obscured at 200 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the south-southwest at 10 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, a few clouds at 12,000 feet, scattered clouds at 25,000 feet

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

6/8927 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local on the route, 1368 nm along the route · a VIP movement · starts Wednesday 14 October · ZSE
6/8923 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local on the route, 1368 nm along the route · a VIP movement · starts Wednesday 14 October · ZLC

Daylight

Sunset at ILN 7:00 pm EDT (23:00 UTC), at SEA 6:25 pm PDT (01:25 UTC) (civil twilight ends 6:56 pm PDT (01:56 UTC)). At 120 knots the arrival at SEA 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: Wilmington Air Park Airport, Seattle-Tacoma International.