Plan a flight · Mon 10:14 am EDT (14:14 UTC)

South Bend International to Duluth International SBN → DLH

398 nautical miles (458 statute miles) northwest on a straight line, true course 323°, about 328° magnetic at the departure end (variation 5W). At 120 knots that is 3 h 17 min at the quickest height in today's winds (4,500 ft, a 1-knot tailwind), arriving about 12:31 pm CDT (17:31 UTC). Right now SBN is VFR, wind from the south-southwest (210°) at 8 knots; DLH is low IFR, wind from the east (080°) at 15 knots, gusting to 25. 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: 6 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 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the last 80 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 SBN.

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

E170 at 15,000 ft, 13 nm southwest, 7:56 am EDT (11:56 UTC): moderate chop turbulence. 219 nm along the route, 13 nm southwest of the line.
as filed, and in English
```
Y50 UA /OV Y50330025/TM 1156/FL150/TP E170/TB MOD CHOP
```
Report
a routine report filed through Y50
Where
25 nm northwest (330°) of Y50
Time
11:56 UTC
Height
at 15,000 ft
Aircraft
E170
Turbulence
moderate chop
B738 at 26,000 ft, 35 nm east, 8:21 am EDT (12:21 UTC): no turbulence from 25,000 ft to 26,000 ft. At the departure end, 35 nm east of the line.
as filed, and in English
```
GSH UA /OV GSH090020/TM 1221/FL260/TP B738/TB NEG 260-250
```
Report
a routine report filed through GSH
Where
20 nm east (090°) of GSH
Time
12:21 UTC
Height
at 26,000 ft
Aircraft
B738
Turbulence
no from 26,000 ft to 25,000 ft
A320 at 30,000 ft, 46 nm southeast, 7:49 am EDT (11:49 UTC): light chop turbulence, remarks: during the descent FL300-260 FL250 better. At the departure end, 46 nm southeast of the line.
as filed, and in English
```
ASW UA /OV OLK/TM 1149/FL300/TP A320/TB CONS LGT CHOP/RM DURD FL300-260 FL250 BETTER
```
Report
a routine report filed through ASW
Where
over OLK
Time
11:49 UTC
Height
at 30,000 ft
Aircraft
A320
Turbulence
continuous light chop
Remarks
during the descent FL300-260 FL250 better
A320 at 36,000 ft, 17 nm southeast, 7:25 am EDT (11:25 UTC): no turbulence. At the departure end, 17 nm southeast of the line.
as filed, and in English
```
GSH UA /OV GSH/TM 1125/FL360/TP A320/TB NEG
```
Report
a routine report filed through GSH
Where
over GSH
Time
11:25 UTC
Height
at 36,000 ft
Aircraft
A320
Turbulence
none
B752 at 32,000 ft, 35 nm northeast, 9:03 am EDT (13:03 UTC): light chop turbulence. 30 nm along the route, 35 nm northeast of the line.
as filed, and in English
```
BIV UA /OV PMM/TM 1303/FL320/TP B752/TB CONS LGT CHOP
```
Report
a routine report filed through BIV
Where
over PMM
Time
13:03 UTC
Height
at 32,000 ft
Aircraft
B752
Turbulence
continuous light chop
B39M at 34,000 ft, 24 nm northeast, 10:01 am EDT (14:01 UTC): no turbulence. 60 nm along the route, 24 nm northeast of the line.
as filed, and in English
```
BIV UA /OV PMM300030/TM 1401/FL340/TP B39M/TB NEG
```
Report
a routine report filed through BIV
Where
30 nm northwest (300°) of PMM
Time
14:01 UTC
Height
at 34,000 ft
Aircraft
B39M
Turbulence
none
B39M at 36,000 ft, 39 nm southwest, 9:18 am EDT (13:18 UTC): no turbulence. 70 nm along the route, 39 nm southwest of the line.
as filed, and in English
```
PWK UA /OV OBK/TM 1318/FL360/TP B39M/TB NEG
```
Report
a routine report filed through PWK
Where
over OBK
Time
13:18 UTC
Height
at 36,000 ft
Aircraft
B39M
Turbulence
none
E545 at 1,700 ft, 2 nm south, 9:44 am EDT (13:44 UTC): a routine report with nothing remarked on. At the destination 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, 9:12 am EDT (13:12 UTC): a routine report with nothing remarked on. At the destination 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, 8:26 am EDT (12:26 UTC): overcast from 1,600 ft to 3,500 ft, 14 °C, remarks: during the climb. At the destination 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, 7:45 am EDT (11:45 UTC): a routine report with nothing remarked on. At the destination 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

Winds aloft along the route, and the time en route the forecast for use 14:00–21:00 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 4 forecast points nearest it (MKG, GRB, LSE, DLH). 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	230° at 14 kt	−1 kt		121 kt	3 h 17 min	12:31 pm CDT (17:31 UTC)
6,500 ft	240° at 23 kt	+3 kt	15 °C	117 kt	3 h 24 min	12:38 pm CDT (17:38 UTC)
8,500 ft	250° at 25 kt	+10 kt	11 °C	110 kt	3 h 37 min	12:51 pm CDT (17:51 UTC)
10,500 ft	260° at 25 kt	+13 kt	8 °C	107 kt	3 h 43 min	12:57 pm CDT (17:57 UTC)
12,500 ft	270° at 25 kt	+15 kt	4 °C	105 kt	3 h 47 min	1:01 pm CDT (18:01 UTC)
14,500 ft	270° at 27 kt	+16 kt	-1 °C	104 kt	3 h 50 min	1:04 pm CDT (18:04 UTC)
16,500 ft	270° at 29 kt	+18 kt	-6 °C	102 kt	3 h 54 min	1:08 pm CDT (18:08 UTC)
18,000 ft FL180	270° at 31 kt	+19 kt	-10 °C	101 kt	3 h 56 min	1:10 pm CDT (18:10 UTC)
24,000 ft FL240	270° at 35 kt	+23 kt	-22 °C	97 kt	4 h 06 min	1:20 pm CDT (18:20 UTC)
30,000 ft FL300	260° at 42 kt	+23 kt	-37 °C	97 kt	4 h 06 min	1:20 pm CDT (18:20 UTC)
34,000 ft FL340	280° at 45 kt	+36 kt	-40 °C	84 kt	4 h 44 min	1:58 pm CDT (18:58 UTC)
39,000 ft FL390	290° at 62 kt	+54 kt	-48 °C	66 kt	6 h 02 min	3:16 pm CDT (20:16 UTC)

Based on data from the 12th at 12:00 UTC; valid on the 12th at 18:00 UTC for use 14:00 to 21:00 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
MKG	used from 0 nm out; 70 nm from the line	240/27	240/26 15°	270/27 9°	280/27 5°	280/28 -9°	280/32 -22°	270/41 -38°	290/44 -41°	300/60 -48°
GRB	used from 100 nm out; 69 nm from the line	260/10	240/27 16°	260/31 10°	270/25 5°	280/31 -10°	280/35 -22°	270/46 -37°	290/43 -40°	300/64 -48°
LSE	used from 249 nm out; 94 nm from the line	240/16	230/27 20°	250/35 12°	260/28 5°	260/30 -9°	260/37 -21°	260/38 -36°	280/44 -37°	280/52 -47°
DLH	used from 299 nm out; 75 nm from the line	090/34	210/13 14°	240/14 11°	250/20 4°	250/38 -10°	260/39 -22°	250/41 -37°	270/53 -41°	280/68 -48°

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
SBN South Bend, IN	departure	VFR	from the south-southwest (210°) at 8 knots	10+ mi	none	798 ft	9:54 am EDT (13:54 UTC)
BEH Benton Harbor, MI	20 nm out, 12 nm northeast of the line	VFR	from the south (180°) at 6 knots	10+ mi	none	649 ft	13:53 UTC
MWC Milwaukee, WI	110 nm out, 9 nm west of the line, tower	VFR	from the southwest (220°) at 5 knots	10+ mi	none	744 ft	13:55 UTC
OSH Oshkosh, WI	169 nm out, 7 nm northeast of the line, tower	VFR	from the south (190°) at 10 knots	10+ mi	none	808 ft	13:53 UTC
ATW Appleton, WI	179 nm out, 18 nm northeast of the line, tower	VFR Sky: scattered clouds at 12,000 feet	from the south (180°) at 6 knots	10+ mi	none	918 ft	13:45 UTC
CWA Mosinee, WI	239 nm out, 4 nm southeast of the line, tower	VFR	from the south (170°) at 5 knots	10+ mi	none	1,277 ft	13:50 UTC
MDZ Medford, WI	269 nm out, 8 nm southwest of the line	VFR	calm	10+ mi	none	1,478 ft	13:55 UTC
HYR Hayward, WI	339 nm out, 9 nm southwest of the line	IFR Sky: overcast at 500 feet	from the north-northeast (030°) at 11 knots	10+ mi	500 ft	1,215 ft	13:53 UTC
OLG Solon Springs, WI	368 nm out, 10 nm southwest of the line	IFR Sky: overcast at 500 feet	from the northeast (050°) at 13 knots, gusting to 17	10+ mi	500 ft	1,102 ft	13:55 UTC
DLH Duluth, MN	destination	low IFR Sky: overcast at 300 feet Weather: light drizzle, mist	from the east (080°) at 15 knots, gusting to 25	0.75 mi	300 ft	1,427 ft	8:55 am CDT (13:55 UTC)

The highest airport on this list sits at 1,478 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At DLH when you get there the forecast at the estimated arrival, 12:31 pm CDT (17:31 UTC)

Wind from the east at 15 knots, gusting to 26, visibility 1½ miles, light drizzle, mist, overcast at 400 feet low IFR

The whole forecast for DLH

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

The forecast for SBN, the departure

From Mon 8:00 am EDT (12:00 UTC): wind from the south at 7 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 1:00 pm EDT (17:00 UTC): wind from the south-southwest at 12 knots, gusting to 20, 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 9 knots, visibility more than 6 miles, scattered clouds at 10,000 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 SBN 7:09 pm EDT (23:09 UTC), at DLH 6:27 pm CDT (23:27 UTC) (civil twilight ends 6:58 pm CDT (23:58 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, 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: South Bend International, Duluth International.