Plan a flight · Mon 8:57 am CDT (13:57 UTC)

Duluth International to Seattle-Tacoma International DLH → SEA

1,223 nautical miles (1,407 statute miles) west on a straight line, true course 283°, about 284° magnetic at the departure end (variation 1W). At 120 knots that is 9 h 42 min at the quickest height in today's winds (4,500 ft, a 6-knot tailwind), arriving about 4:39 pm PDT (23:39 UTC). Right now DLH is low IFR, wind from the east-northeast (070°) at 15 knots, gusting to 24; SEA is VFR, wind from the southeast (130°) at 7 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: 1 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 C20C: thunderstorms (a convective SIGMET) up to 37,000 ft, moving from the southwest at 40 knots, until 10:55 am CDT (15:55 UTC). Over the route from 278 to 288 nm out.
as issued
```
WSUS32 KKCI 121355
MKCC WST 121355
CONVECTIVE SIGMET 20C
VALID UNTIL 1555Z
SD ND
FROM 80W GFK-40WNW FAR-40W ABR-50ENE DPR-30S BIS-80W GFK
AREA TS MOV FROM 21040KT. TOPS TO FL370.
```
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 first 855 nm of the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 209 to 487 nm out.
AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 487 to 1024 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 716 to 915 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 815 to 1163 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 DLH.

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

E545 at 1,700 ft, 2 nm south, 8:44 am CDT (13:44 UTC): a routine report with nothing remarked on. At the departure end, 2 nm south of the line.
as filed, and in English
```
DLH UA /OV DLH/TM 1344/FL017/TP E545/SK B017 T 035
```
Report
a routine report filed through DLH
Where
over DLH
Time
13:44 UTC
Height
at 1,700 ft
Aircraft
E545
Sky
B017 T at 3,500 ft
E75L at 300 ft, 2 nm south, 8:12 am CDT (13:12 UTC): a routine report with nothing remarked on. At the departure end, 2 nm south of the line.
as filed, and in English
```
DLH UA /OV DLH/TM 1312/FL003/TP E75L/SK B003 T037
```
Report
a routine report filed through DLH
Where
over DLH
Time
13:12 UTC
Height
at 300 ft
Aircraft
E75L
Sky
B003 T037
CRJ9 at 1,600 ft, 2 nm south, 7:26 am CDT (12:26 UTC): overcast from 1,600 ft to 3,500 ft, 14 °C, remarks: during the climb. At the departure end, 2 nm south of the line.
as filed, and in English
```
DLH UA /OV DLH/TM 1226/FL016/TP CRJ9/SK 016OVC035/TA 14/RM DURC
```
Report
a routine report filed through DLH
Where
over DLH
Time
12:26 UTC
Height
at 1,600 ft
Aircraft
CRJ9
Sky
016OVC035
Temperature
14 °C
Remarks
during the climb
BE20 at 1,600 ft, 8 nm north, 6:45 am CDT (11:45 UTC): a routine report with nothing remarked on. At the departure end, 8 nm north of the line.
as filed, and in English
```
DLH UA /OV 10N DLH /TM 1145/FL016/TP BE20/SK B016 T035
```
Report
a routine report filed through DLH
Where
10N dlh
Time
11:45 UTC
Height
at 1,600 ft
Aircraft
BE20
Sky
B016 T035
PC12 at 12,000 ft, 8 nm northeast, 6:39 am CDT (11:39 UTC): remarks: during the climb. 60 nm along the route, 8 nm northeast of the line.
as filed, and in English
```
GPZ UA /OV GPZ/TM 1139/FL120/TP PC12/SK BASE024-TOP033/RM DURC
```
Report
a routine report filed through GPZ
Where
over GPZ
Time
11:39 UTC
Height
at 12,000 ft
Aircraft
PC12
Sky
BASE024-TOP033
Remarks
during the climb
K100 at 2,800 ft, 31 nm south, 8:07 am CDT (13:07 UTC): no turbulence, no icing, 10 °C. 149 nm along the route, 31 nm south of the line.
as filed, and in English
```
DTL UA /OV DTL/TM 1307/FL028/TP K100/SK BASE028/TA 10/TB NEG/IC NEG
```
Report
a routine report filed through DTL
Where
over DTL
Time
13:07 UTC
Height
at 2,800 ft
Aircraft
K100
Sky
BASE028
Temperature
10 °C
Turbulence
none
Icing
none
PC12 at 3,500 ft, 33 nm south, 8:39 am CDT (13:39 UTC): overcast from 1,200 ft to 3,500 ft, 10 °C. 189 nm along the route, 33 nm south of the line.
as filed, and in English
```
FAR UA /OV KFAR270005/TM 1339/FL035/TP PC12/SK OVC012-TOP035/TA 10
```
Report
a routine report filed through FAR
Where
5 nm west (270°) of KFAR
Time
13:39 UTC
Height
at 3,500 ft
Aircraft
PC12
Sky
overcast from 1,200 ft, tops 3,500 ft
Temperature
10 °C
TBM8 at 2,700 ft, 32 nm south, 8:03 am CDT (13:03 UTC): overcast from 1,300 ft to 2,700 ft. 189 nm along the route, 32 nm south of the line.
as filed, and in English
```
FAR UA /OV KFAR/TM 1303/FL027/TP TBM8/SK OVC013-TOP027
```
Report
a routine report filed through FAR
Where
over KFAR
Time
13:03 UTC
Height
at 2,700 ft
Aircraft
TBM8
Sky
overcast from 1,300 ft, tops 2,700 ft
M600 at 2,800 ft, 32 nm south, 7:36 am CDT (12:36 UTC): overcast up to 2,800 ft. 189 nm along the route, 32 nm south of the line.
as filed, and in English
```
FAR UA /OV KFAR270002/TM 1236/FL028/TP M600/SK OVCUNKN-TOP028
```
Report
a routine report filed through FAR
Where
2 nm west (270°) of KFAR
Time
12:36 UTC
Height
at 2,800 ft
Aircraft
M600
Sky
overcast, tops 2,800 ft
B190 at 1,100 ft, 34 nm south, 7:30 am CDT (12:30 UTC): overcast from 1,200 ft to 2,700 ft, remarks: during the descent the ILS approach to runway 36. 189 nm along the route, 34 nm south of the line.
as filed, and in English
```
FAR UA /OV KFAR180002/TM 1230/FL011/TP B190/SK OVC012-TOP027/RM DURD ILS36
```
Report
a routine report filed through FAR
Where
2 nm south (180°) of KFAR
Time
12:30 UTC
Height
at 1,100 ft
Aircraft
B190
Sky
overcast from 1,200 ft, tops 2,700 ft
Remarks
during the descent the ILS approach to runway 36
A321 at 1,200 ft, 42 nm south, 7:16 am CDT (12:16 UTC): overcast from 1,200 ft to 2,900 ft. 189 nm along the route, 42 nm south of the line.
as filed, and in English
```
FAR UA /OV FAR/TM 1216/FL012/TP A321/SK OVC012-TOP029
```
Report
a routine report filed through FAR
Where
over FAR
Time
12:16 UTC
Height
at 1,200 ft
Aircraft
A321
Sky
overcast from 1,200 ft, tops 2,900 ft
E75L at 1,300 ft, 42 nm south, 6:20 am CDT (11:20 UTC): overcast from 1,300 ft to 2,900 ft. 189 nm along the route, 42 nm south of the line.
as filed, and in English
```
FAR UA /OV FAR/TM 1120/FL013/TP E75L/SK OVC013-TOP029
```
Report
a routine report filed through FAR
Where
over FAR
Time
11:20 UTC
Height
at 1,300 ft
Aircraft
E75L
Sky
overcast from 1,300 ft, tops 2,900 ft
E75L at 2,200 ft, 32 nm south, 5:58 am CDT (10:58 UTC): overcast from 1,300 ft to 2,200 ft. 189 nm along the route, 32 nm south of the line.
as filed, and in English
```
FAR UA /OV KFAR/TM 1058/FL022/TP E75L/SK OVC013-TOP022
```
Report
a routine report filed through FAR
Where
over KFAR
Time
10:58 UTC
Height
at 2,200 ft
Aircraft
E75L
Sky
overcast from 1,300 ft, tops 2,200 ft
P28A at 5,000 ft, 30 nm north, 8:27 am CDT (13:27 UTC): no icing, overcast above 1,000 ft, 5 °C, remarks: during the climb indefinite ceiling visibility 1/2SM. 209 nm along the route, 30 nm north of the line.
as filed, and in English
```
GFK UA /OV GFK030003/TM 1327/FL050/TP P28A/SK OVC010/WX FV00SM/TA 05/IC NEG/RM DURC INDEFINITE CEILING VIS 1/2SM
```
Report
a routine report filed through GFK
Where
3 nm northeast (030°) of GFK
Time
13:27 UTC
Height
at 5,000 ft
Aircraft
P28A
Sky
overcast from 1,000 ft
Weather
flight visibility 0 miles
Temperature
5 °C
Icing
none
Remarks
during the climb indefinite ceiling visibility 1/2SM

5 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 11 forecast points nearest it (DLH, AXN, GFK, MOT, DIK, GGW, 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	090° at 6 kt	−6 kt	0 °C	126 kt	9 h 42 min	4:39 pm PDT (23:39 UTC)
6,500 ft	120° at 2 kt	−3 kt	3 °C	123 kt	9 h 57 min	4:54 pm PDT (23:54 UTC)
8,500 ft	210° at 3 kt	+1 kt	2 °C	119 kt	10 h 17 min	5:14 pm PDT (00:14 UTC)
10,500 ft	240° at 9 kt	+6 kt	-2 °C	114 kt	10 h 44 min	5:41 pm PDT (00:41 UTC)
12,500 ft	240° at 14 kt	+11 kt	-4 °C	109 kt	11 h 13 min	6:10 pm PDT (01:10 UTC)
14,500 ft	250° at 16 kt	+13 kt	-7 °C	107 kt	11 h 26 min	6:23 pm PDT (01:23 UTC)
16,500 ft	250° at 18 kt	+15 kt	-11 °C	105 kt	11 h 39 min	6:36 pm PDT (01:36 UTC)
18,000 ft FL180	250° at 20 kt	+17 kt	-14 °C	103 kt	11 h 52 min	6:49 pm PDT (01:49 UTC)
24,000 ft FL240	250° at 22 kt	+19 kt	-26 °C	101 kt	12 h 07 min	7:04 pm PDT (02:04 UTC)
30,000 ft FL300	240° at 21 kt	+17 kt	-38 °C	103 kt	11 h 52 min	6:49 pm PDT (01:49 UTC)
34,000 ft FL340	240° at 38 kt	+32 kt	-41 °C	88 kt	13 h 54 min	8:51 pm PDT (03:51 UTC)
39,000 ft FL390	250° at 48 kt	+43 kt	-45 °C	77 kt	15 h 53 min	10:50 pm PDT (05:50 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
DLH	used from 0 nm out; 25 nm from the line	090/31	250/7 14°	250/26 11°	250/36 4°	280/36 -11°	290/35 -22°	300/39 -38°	280/41 -44°	280/66 -49°
AXN	used from 99 nm out; 84 nm from the line	110/6	260/10 16°	240/17 12°	250/20 5°	260/29 -10°	260/35 -22°	260/29 -38°	270/48 -41°	270/61 -48°
GFK	used from 149 nm out; 46 nm from the line	080/18	L/V 11°	260/22 7°	250/48 3°	260/51 -11°	250/44 -22°	260/34 -38°	260/53 -44°	270/66 -49°
MOT	used from 298 nm out; 59 nm from the line		120/14 4°	190/25 5°	220/41 1°	240/43 -11°	230/39 -22°	220/44 -38°	240/62 -42°	250/73 -48°
DIK	used from 447 nm out; 82 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°
GGW	used from 497 nm out; 68 nm from the line		100/7 -1°	070/10 -3°	190/6 -4°	210/34 -10°	230/33 -24°	210/48 -37°	230/65 -40°	230/71 -46°
GTF	used from 696 nm out; 72 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 845 nm out; 29 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 944 nm out; 62 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 1093 nm out; 75 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 1143 nm out; 55 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
DLH Duluth, MN	departure	low IFR Sky: overcast at 400 feet Weather: light drizzle, mist	from the east-northeast (070°) at 15 knots, gusting to 24	1.5 mi	400 ft	1,427 ft	7:55 am CDT (12:55 UTC)
XVG Longville, MN	80 nm out, 9 nm southwest of the line	IFR Sky: overcast at 900 feet	variable at 4 knots	8 mi	900 ft	1,336 ft	13:14 UTC
FSE Fosston, MN	149 nm out, 15 nm north of the line	IFR Sky: overcast at 600 feet	from the northeast (040°) at 11 knots	10+ mi	600 ft	1,278 ft	13:35 UTC
MOT Minot, ND	378 nm out, 23 nm north of the line, tower	marginal VFR Sky: overcast at 1,000 feet Weather: light rain	from the north-northeast (020°) at 8 knots	10+ mi	1,000 ft	1,715 ft	13:31 UTC
OLF Wolf Point, MT	547 nm out, 1 nm west of the line	marginal VFR Sky: overcast at 1,400 feet	from the north (010°) at 8 knots	9 mi	1,400 ft	1,988 ft	13:53 UTC
HVR Havre, MT	716 nm out, 23 nm north of the line	IFR Sky: overcast at 600 feet	from the northeast (050°) at 5 knots	8 mi	600 ft	2,591 ft	13:53 UTC
CII Choteau, MT	815 nm out, 19 nm south of the line	no report just now				3,946 ft
GPI Kalispell, MT	895 nm out, 14 nm north of the line, tower	VFR	from the north-northwest (330°) at 6 knots	10+ mi	none	2,976 ft	12:55 UTC
SFF Spokane, WA	1024 nm out, 13 nm south of the line, tower	VFR Sky: a few clouds at 6,000 feet, overcast at 8,500 feet	from the east-northeast (070°) at 6 knots	10+ mi	8,500 ft	1,956 ft	13:53 UTC
EAT Wenatchee, WA	1143 nm out, 17 nm southeast of the line	reported, no category	calm		none	1,248 ft	12:55 UTC
SEA Seattle, WA	destination	VFR Sky: a few clouds at 8,000 feet	from the southeast (130°) at 7 knots	10+ mi	none	432 ft	6:53 am PDT (13:53 UTC)

The highest airport on this list sits at 3,946 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, 4:39 pm PDT (23:39 UTC)

Wind from the west at 6 knots, visibility more than 6 miles, clear skies 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 DLH, the departure

From Mon 9:00 am CDT (14:00 UTC): wind from the east at 15 knots, gusting to 26, visibility 1½ miles, light drizzle, mist, overcast at 400 feet
From Mon 5:00 pm CDT (22:00 UTC): wind from the east-northeast at 16 knots, gusting to 27, visibility 4 miles, light rain showers, mist, overcast at 200 feet
30% chance between Mon 5:00 pm CDT (22:00 UTC) and 7:00 pm CDT (00:00 UTC): visibility 3 miles, light thunderstorms with rain, a broken layer at 400 feet (thunderheads), overcast at 800 feet
From Mon 11:00 pm CDT (04:00 UTC): wind from the east-northeast at 14 knots, gusting to 23, visibility more than 6 miles, showers nearby, overcast at 300 feet
From Tue 1:00 am CDT (06:00 UTC): wind from the northeast at 11 knots, gusting to 18, visibility more than 6 miles, overcast at 300 feet
From Tue 6:00 am CDT (11:00 UTC): wind from the north at 5 knots, visibility more than 6 miles, overcast at 500 feet

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

6/4348 GRAND FORKS AFB, ND, Sunday, March 8, 2026 through Sunday, November 1, 2026 Local 15 nm from the route, 219 nm along the route · security · until 1 November · ZMP
6/8927 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local 2 nm from the route, 895 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 2 nm from the route, 895 nm along the route · a VIP movement · starts Wednesday 14 October · ZLC

Daylight

Sunset at DLH 6:27 pm CDT (23:27 UTC), at SEA 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

Radar now, the upper Mississippi valley · loop National Weather Service

Radar now, the northern Rockies · loop National Weather Service

Radar now, the Pacific Northwest · 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: Duluth International, Seattle-Tacoma International.