Plan a flight · Mon 2:59 am MDT (08:59 UTC)

Aspen-Pitkin County/Sardy Field to South Bend International ASE → SBN

948 nautical miles (1,091 statute miles) east on a straight line, true course 074°, about 065° magnetic at the departure end (variation 9E). At 120 knots that is 5 h 09 min at the quickest height in today's winds (34,000 ft, a 64-knot tailwind), arriving about 10:08 am EDT (14:08 UTC). Right now ASE is VFR, wind calm; SBN is marginal VFR, wind calm. 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: 2 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 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). Over the first 110 nm of the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Near the route, at the departure end.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 42,000 ft. Over the first 160 nm of the route.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 180 nm of the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 10 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 240 to 789 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 ASE.

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

A321 at 31,000 ft, 43 nm south, 12:41 am MDT (06:41 UTC): moderate turbulence, remarks: mtw +/-15KT zdvwc. 100 nm along the route, 43 nm south of the line.
as filed, and in English
```
COS UA /OV BRK/TM 0641/FL310/TP A321/TB MOD/RM MTW +/-15KT. ZDVWC
```
Report
a routine report filed through COS
Where
over BRK
Time
06:41 UTC
Height
at 31,000 ft
Aircraft
A321
Turbulence
moderate
Remarks
mtw +/-15KT zdvwc
CRJ2 at 22,000 ft, 21 nm southeast, 12:35 am MDT (06:35 UTC): no turbulence up to 26,000 ft, no icing, clear from 22,000 ft to 60,000 ft, remarks: during the descent ZDVWC-26. 50 nm along the route, 21 nm southeast of the line.
as filed, and in English
```
DEN UA /OV DEN220060/TM 0635/FL220/TP CRJ2/SK SKC/TB NEG BLO 260/IC NEG/RM DURD/ ZDVWC-26
```
Report
a routine report filed through DEN
Where
60 nm southwest (220°) of DEN
Time
06:35 UTC
Height
at 22,000 ft
Aircraft
CRJ2
Sky
clear
Turbulence
no below 26,000 ft
Icing
none
Remarks
during the descent ZDVWC-26
B738 at 23,000 ft, 10 nm south, 12:23 am MDT (06:23 UTC): no turbulence from 23,000 ft to 26,000 ft, clear from 23,000 ft to 60,000 ft, remarks: during the descent sskii star ZDVWC-06. 50 nm along the route, 10 nm south of the line.
as filed, and in English
```
DEN UA /OV DEN230060/TM 0623/FL230/TP B738/SK SKC/TB NEG 230-260/RM DURD SSKII STAR. ZDVWC-06
```
Report
a routine report filed through DEN
Where
60 nm southwest (230°) of DEN
Time
06:23 UTC
Height
at 23,000 ft
Aircraft
B738
Sky
clear
Turbulence
no from 23,000 ft to 26,000 ft
Remarks
during the descent sskii star ZDVWC-06
B38M at 22,000 ft, 23 nm south, 2:14 am MDT (08:14 UTC): no turbulence, remarks: zdvwc. 60 nm along the route, 23 nm south of the line.
as filed, and in English
```
DEN UA /OV DEN216059/TM 0814/FL220/TP B38M/TB NEG/RM ZDVWC
```
Report
a routine report filed through DEN
Where
59 nm southwest (216°) of DEN
Time
08:14 UTC
Height
at 22,000 ft
Aircraft
B38M
Turbulence
none
Remarks
zdvwc
A20N at 25,000 ft, 10 nm north, 12:19 am MDT (06:19 UTC): light chop turbulence up to 26,000 ft, remarks: during the climb ZDVWC-06. 60 nm along the route, 10 nm north of the line.
as filed, and in English
```
DEN UA /OV DEN250045/TM 0619/FL250/TP A20N/TB OCNL LGT CHOP BLO 260/RM DURC. ZDVWC-06
```
Report
a routine report filed through DEN
Where
45 nm west (250°) of DEN
Time
06:19 UTC
Height
at 25,000 ft
Aircraft
A20N
Turbulence
occasional light chop below 26,000 ft
Remarks
during the climb ZDVWC-06
A21N at 33,000 ft, 43 nm south, 12:59 am MDT (06:59 UTC): light chop turbulence, remarks: mtw a 10-knot loss of airspeed 100FT zdvwc. 100 nm along the route, 43 nm south of the line.
as filed, and in English
```
COS UA /OV BRK/TM 0659/FL330/TP A21N/TB LGT CHOP/RM MTW +/-10KT 100FT. ZDVWC
```
Report
a routine report filed through COS
Where
over BRK
Time
06:59 UTC
Height
at 33,000 ft
Aircraft
A21N
Turbulence
light chop
Remarks
mtw a 10-knot loss of airspeed 100FT zdvwc
B737 descending, 8 nm northwest, 2:10 am MDT (08:10 UTC): light chop turbulence. 110 nm along the route, 8 nm northwest of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0810/FLDURD/TP B737/TB LGT CHOP
```
Report
a routine report filed through DEN
Where
over DEN
Time
08:10 UTC
Height
during the descent
Aircraft
B737
Turbulence
light chop
B737 descending, 8 nm northwest, 1:10 am MDT (07:10 UTC): remarks: smooth. 110 nm along the route, 8 nm northwest of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0710/FLDURD/TP B737/RM SMOOTH
```
Report
a routine report filed through DEN
Where
over DEN
Time
07:10 UTC
Height
during the descent
Aircraft
B737
Remarks
smooth
B738 descending, 8 nm northwest, 12:15 am MDT (06:15 UTC): light chop turbulence. 110 nm along the route, 8 nm northwest of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0615/FLDURD/TP B738/TB LGT CHOP
```
Report
a routine report filed through DEN
Where
over DEN
Time
06:15 UTC
Height
during the descent
Aircraft
B738
Turbulence
light chop
B739 at 35,000 ft, 41 nm south, 1:05 am MDT (07:05 UTC): no turbulence. 868 nm along the route, 41 nm south of the line.
as filed, and in English
```
TIP UA /OV RBS010023/TM 0705/FL350/TP B739/TB NEG
```
Report
a routine report filed through TIP
Where
23 nm north (010°) of RBS
Time
07:05 UTC
Height
at 35,000 ft
Aircraft
B739
Turbulence
none

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 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 8 forecast points nearest it (DEN, GLD, GRI, OMA, DSM, BRL, DBQ, JOT). 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	250° at 34 kt	−33 kt		153 kt	6 h 12 min	11:11 am EDT (15:11 UTC)
5,500 ft	250° at 30 kt	−29 kt	23 °C	149 kt	6 h 22 min	11:21 am EDT (15:21 UTC)
7,500 ft	250° at 25 kt	−24 kt	15 °C	144 kt	6 h 35 min	11:34 am EDT (15:34 UTC)
9,500 ft	250° at 22 kt	−21 kt	11 °C	141 kt	6 h 43 min	11:42 am EDT (15:42 UTC)
11,500 ft	240° at 22 kt	−21 kt	6 °C	141 kt	6 h 43 min	11:42 am EDT (15:42 UTC)
13,500 ft	240° at 24 kt	−23 kt	2 °C	143 kt	6 h 38 min	11:37 am EDT (15:37 UTC)
15,500 ft	240° at 28 kt	−27 kt	-3 °C	147 kt	6 h 27 min	11:26 am EDT (15:26 UTC)
17,500 ft	240° at 31 kt	−30 kt	-7 °C	150 kt	6 h 19 min	11:18 am EDT (15:18 UTC)
18,000 ft FL180	240° at 32 kt	−31 kt	-8 °C	151 kt	6 h 17 min	11:16 am EDT (15:16 UTC)
24,000 ft FL240	250° at 40 kt	−39 kt	-20 °C	159 kt	5 h 58 min	10:57 am EDT (14:57 UTC)
30,000 ft FL300	250° at 51 kt	−51 kt	-32 °C	171 kt	5 h 33 min	10:32 am EDT (14:32 UTC)
34,000 ft FL340	260° at 63 kt	−64 kt	-37 °C	184 kt	5 h 09 min	10:08 am EDT (14:08 UTC)
39,000 ft FL390	260° at 63 kt	−64 kt	-48 °C	184 kt	5 h 09 min	10:08 am EDT (14:08 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
DEN	used from 0 nm out; 84 nm from the line			270/24 11°	230/13 5°	230/48 -8°	230/46 -20°	230/63 -30°	240/78 -36°	240/78 -48°
GLD	used from 200 nm out; 51 nm from the line		260/37	260/25 14°	250/27 8°	230/36 -8°	230/49 -21°	250/71 -30°	260/82 -36°	250/73 -48°
GRI	used from 299 nm out; 83 nm from the line		230/39 23°	230/32 15°	210/29 7°	230/31 -8°	230/43 -21°	250/52 -31°	260/59 -35°	260/59 -46°
OMA	used from 449 nm out; 46 nm from the line	230/47	240/33 21°	230/22 13°	220/27 5°	240/35 -8°	250/43 -21°	260/47 -33°	260/59 -36°	270/58 -46°
DSM	used from 549 nm out; 48 nm from the line	250/47	260/25 20°	240/19 11°	240/31 5°	250/26 -9°	260/38 -20°	260/47 -34°	270/58 -37°	270/61 -47°
BRL	used from 699 nm out; 41 nm from the line	250/32	250/19 17°	260/15 11°	270/16 3°	290/23 -7°	260/42 -20°	270/52 -34°	280/63 -39°	290/64 -48°
DBQ	used from 749 nm out; 57 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°
JOT	used from 798 nm out; 42 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°

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
ASE Aspen, CO	departure	VFR Sky: a few clouds at 2,000 feet, a broken layer at 9,000 feet	calm	10+ mi	9,000 ft	7,837 ft	2:53 am MDT (08:53 UTC)
BJC Denver, CO	90 nm out, 19 nm north of the line, tower	VFR	from the south (190°) at 7 knots	10+ mi	none	5,673 ft	08:55 UTC
APA Denver, CO	100 nm out, 6 nm southwest of the line, tower	VFR Sky: a few clouds at 22,000 feet	from the south (190°) at 10 knots	10+ mi	none	5,884 ft	08:53 UTC
RYA Wray, CO	220 nm out, 1 nm southeast of the line	no report just now				3,677 ft
EAR Kearney, NE	369 nm out, 7 nm north of the line	VFR	from the south (190°) at 9 knots	10+ mi	none	2,131 ft	08:56 UTC
GRI Grand Island, NE	409 nm out, 15 nm north of the line, tower	VFR	from the south (180°) at 14 knots	10+ mi	none	1,847 ft	08:53 UTC
LNK Lincoln, NE	479 nm out, 6 nm southwest of the line, tower	VFR	from the south (190°) at 11 knots	10+ mi	none	1,218 ft	08:54 UTC
DSM Des Moines, IA	619 nm out, 16 nm north of the line, tower	VFR Sky: a few clouds at 10,000 feet, a few clouds at 25,000 feet	from the south (190°) at 8 knots	10+ mi	none	957 ft	08:54 UTC
MUT Muscatine, IA	729 nm out, 6 nm south of the line	reported, no category	calm	10+ mi	none	547 ft	08:55 UTC
MLI Moline, IL	759 nm out, 4 nm south of the line, tower	VFR	from the south-southwest (200°) at 5 knots	10+ mi	none	589 ft	08:52 UTC
LOT Chicago/Romeoville, IL	868 nm out, 2 nm south of the line, tower	VFR	from the south-southeast (150°) at 5 knots	10+ mi	none	679 ft	08:35 UTC
SBN South Bend, IN	destination	marginal VFR Weather: mist	calm	4 mi	none	798 ft	4:54 am EDT (08:54 UTC)

The highest airport on this list sits at 7,837 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At SBN when you get there the forecast at the estimated arrival, 10:08 am EDT (14:08 UTC)

Wind from the south at 8 knots, visibility more than 6 miles, scattered clouds at 25,000 feet VFR

The whole forecast for SBN

From Mon 2:00 am EDT (06:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
At times between Mon 2:00 am EDT (06:00 UTC) and 5:00 am EDT (09:00 UTC): visibility 2 miles, mist
From Mon 6:00 am EDT (10:00 UTC): wind from the south at 8 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 2:00 pm EDT (18:00 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

The forecast for ASE, the departure

From Mon 12:00 am MDT (06:00 UTC): wind from the south-southeast at 6 knots, visibility more than 6 miles, low-level wind shear, a broken layer at 8,000 feet, a broken layer at 10,000 feet
At times between Mon 12:00 am MDT (06:00 UTC) and 4:00 am MDT (10:00 UTC): visibility 4 miles, light rain showers, a broken layer at 6,000 feet
From Mon 5:00 am MDT (11:00 UTC): wind from the south at 6 knots, visibility more than 6 miles, a few clouds at 5,000 feet, scattered clouds at 12,000 feet
From Mon 9:00 am MDT (15:00 UTC): wind from the south at 9 knots, visibility more than 6 miles, a few clouds at 4,500 feet, a few clouds at 25,000 feet
From Mon 1:00 pm MDT (19:00 UTC): wind from the south-southwest at 11 knots, gusting to 25, visibility more than 6 miles, a few clouds at 7,000 feet, a few clouds at 25,000 feet
From Mon 6:00 pm MDT (00:00 UTC): wind from the southwest at 7 knots, visibility more than 6 miles, a few clouds at 6,000 feet, a few clouds at 20,000 feet
30% chance between Mon 6:00 pm MDT (00:00 UTC) and 12:00 am MDT (06:00 UTC): visibility 4 miles, light rain showers, a broken layer at 6,000 feet

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

6/8911 DENVER, CO, Monday, October 12, 2026 UTC 14 nm from the route, 100 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZDV

Daylight

Sunset at ASE 6:31 pm MDT (00:31 UTC), at SBN 7:09 pm EDT (23:09 UTC) (civil twilight ends 7:36 pm EDT (23:36 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 southern Rockies · loop National Weather Service

Radar now, the northern Rockies · 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: Aspen-Pitkin County/Sardy Field, South Bend International.