Plan a flight · Sun 8:12 pm EDT (00:12 UTC)

Willow Run Airport to San Antonio International YIP → SAT

1,050 nautical miles (1,209 statute miles) southwest on a straight line, true course 228°, about 234° magnetic at the departure end (variation 6W). At 120 knots that is 8 h 41 min at the quickest height in today's winds (24,000 ft, a 1-knot tailwind), arriving about 3:53 am CDT (08:53 UTC), after sunset at the destination. Right now YIP is marginal VFR, wind calm; SAT is VFR, wind from the south-southeast (150°) at 10 knots, gusting to 20. 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: 3 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 30 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 YIP.

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

A320 at 26,500 ft, 34 nm southeast, 6:46 pm EDT (22:46 UTC): moderate clear-air turbulence, remarks: ZFW86. 793 nm along the route, 34 nm southeast of the line.
as filed, and in English
```
GGG UA /OV GGG/TM 2246/FL265/TP A320/TB MOD CAT/RM ZFW86
```
Report
a routine report filed through GGG
Where
over GGG
Time
22:46 UTC
Height
at 26,500 ft
Aircraft
A320
Turbulence
moderate clear-air turbulence
Remarks
ZFW86
GLF5 at 9,000 ft, 26 nm north, 7:13 pm EDT (23:13 UTC): overcast from 1,500 ft to 4,000 ft. At the departure end, 26 nm north of the line.
as filed, and in English
```
PTK UA /OV PTK 7E/TM 2313/FL090/TP GLF5/SK OVC015-TOP040
```
Report
a routine report filed through PTK
Where
ptk 7E
Time
23:13 UTC
Height
at 9,000 ft
Aircraft
GLF5
Sky
overcast from 1,500 ft, tops 4,000 ft
PA32 at 1,500 ft, 26 nm north, 7:03 pm EDT (23:03 UTC): overcast above 1,500 ft. At the departure end, 26 nm north of the line.
as filed, and in English
```
PTK UA /OV PTK 1W/TM 2303/FL015/TP PA32/SK OVC015
```
Report
a routine report filed through PTK
Where
ptk 1W
Time
23:03 UTC
Height
at 1,500 ft
Aircraft
PA32
Sky
overcast from 1,500 ft
E75S descending, 8 nm east, 7:01 pm EDT (23:01 UTC): a routine report with nothing remarked on. At the departure end, 8 nm east of the line.
as filed, and in English
```
DTW UA /OV RWY 3R/TM 2301/FLDURD/TP E75S/SK TOPS 020 BASES 010
```
Report
a routine report filed through DTW
Where
runway 3R
Time
23:01 UTC
Height
during the descent
Aircraft
E75S
Sky
tops 2,000 ft bases 1,000 ft
E55P descending, 0 nm northwest, 7:00 pm EDT (23:00 UTC): a routine report with nothing remarked on. At the departure end, 0 nm northwest of the line.
as filed, and in English
```
YIP UA /OV KYIP/TM 2300/FLDURD/TP E55P/SK B015
```
Report
a routine report filed through YIP
Where
over KYIP
Time
23:00 UTC
Height
during the descent
Aircraft
E55P
Sky
B015
CRJ2 descending, 45 nm north, 6:30 pm EDT (22:30 UTC): overcast from 1,900 ft to 2,900 ft. At the departure end, 45 nm north of the line.
as filed, and in English
```
FNT UA /OV FNT/TM 2230/FLDURD/TP CRJ2/SK OVC019 - TOP029
```
Report
a routine report filed through FNT
Where
over FNT
Time
22:30 UTC
Height
during the descent
Aircraft
CRJ2
Sky
overcast from 1,900 ft, tops 2,900 ft
B712 at 300 ft, 8 nm east, 6:21 pm EDT (22:21 UTC): overcast, remarks: tops 4,000 ft bases 300 ft. At the departure end, 8 nm east of the line.
as filed, and in English
```
DTW UA /OV DTW/TM 2221/FL003/TP B712/SK OVC/RM TOPS 040 BASES 003
```
Report
a routine report filed through DTW
Where
over DTW
Time
22:21 UTC
Height
at 300 ft
Aircraft
B712
Sky
overcast
Remarks
tops 4,000 ft bases 300 ft
BE36 at 3,000 ft, 10 nm north, 6:20 pm EDT (22:20 UTC): no turbulence, imc. At the departure end, 10 nm north of the line.
as filed, and in English
```
DTW UA /OV SVM/TM 2220/FL030/TP BE36/SK IMC/TB SMOOTH
```
Report
a routine report filed through DTW
Where
over SVM
Time
22:20 UTC
Height
at 3,000 ft
Aircraft
BE36
Sky
instrument conditions
Turbulence
smooth
H25B at 1,500 ft, 26 nm north, 6:20 pm EDT (22:20 UTC): overcast above 1,700 ft. At the departure end, 26 nm north of the line.
as filed, and in English
```
PTK UA /OV PTK270001/TM 2220/FL015/TP H25B/SK OVC017-TOPUNKN
```
Report
a routine report filed through PTK
Where
1 nm west (270°) of PTK
Time
22:20 UTC
Height
at 1,500 ft
Aircraft
H25B
Sky
overcast from 1,700 ft, tops unknown
A320 descending, 8 nm east, 5:38 pm EDT (21:38 UTC): overcast, remarks: tops 3,500 ft bases 500 ft. At the departure end, 8 nm east of the line.
as filed, and in English
```
DTW UA /OV DTW/TM 2138/FLDURD/TP A320/SK OVC/RM TOPS 035 BASES 005
```
Report
a routine report filed through DTW
Where
over DTW
Time
21:38 UTC
Height
during the descent
Aircraft
A320
Sky
overcast
Remarks
tops 3,500 ft bases 500 ft
C172 descending, 45 nm north, 5:32 pm EDT (21:32 UTC): overcast above 1,800 ft. At the departure end, 45 nm north of the line.
as filed, and in English
```
FNT UA /OV KFNT/TM 2132/FLDURD/TP C172/SK OVC018
```
Report
a routine report filed through FNT
Where
over KFNT
Time
21:32 UTC
Height
during the descent
Aircraft
C172
Sky
overcast from 1,800 ft
SR22 at 5,000 ft, 26 nm north, 5:14 pm EDT (21:14 UTC): no turbulence, overcast above 4,100 ft. At the departure end, 26 nm north of the line.
as filed, and in English
```
DTW UA /OV PTK/TM 2114/FL050/TP SR22/SK UKNOVC041/TB SMOOTH
```
Report
a routine report filed through DTW
Where
over PTK
Time
21:14 UTC
Height
at 5,000 ft
Aircraft
SR22
Sky
UKNOVC041
Turbulence
smooth
C25A at 1,900 ft, 26 nm north, 5:13 pm EDT (21:13 UTC): overcast, remarks: bases 1,900 ft. At the departure end, 26 nm north of the line.
as filed, and in English
```
PTK UA /OV 2 WEST/TM 2113/FL019/TP C25A/SK OVC/RM BASES 019
```
Report
a routine report filed through PTK
Where
2 west
Time
21:13 UTC
Height
at 1,900 ft
Aircraft
C25A
Sky
overcast
Remarks
bases 1,900 ft
TBM8 at 1,600 ft, 6 nm north, 5:24 pm EDT (21:24 UTC): overcast above 1,600 ft. At the departure end, 6 nm north of the line.
as filed, and in English
```
ARB UA /OV ARB060001/TM 2124/FL016/TP TBM8/SK OVC016
```
Report
a routine report filed through ARB
Where
1 nm northeast (060°) of ARB
Time
21:24 UTC
Height
at 1,600 ft
Aircraft
TBM8
Sky
overcast from 1,600 ft

9 more routine reports are on the map.

Winds aloft along the route, and the time en route the forecast for use 20:00–03:00 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 10 forecast points nearest it (FWA, IND, EVV, CGI, LIT, FSM, SHV, DAL, CLL, SAT). 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	250° at 5 kt	+5 kt		115 kt	9 h 08 min	4:20 am CDT (09:20 UTC)
6,500 ft	280° at 8 kt	+4 kt	15 °C	116 kt	9 h 03 min	4:15 am CDT (09:15 UTC)
8,500 ft	280° at 11 kt	+6 kt	12 °C	114 kt	9 h 13 min	4:25 am CDT (09:25 UTC)
10,500 ft	290° at 13 kt	+5 kt	8 °C	115 kt	9 h 08 min	4:20 am CDT (09:20 UTC)
12,500 ft	300° at 14 kt	+4 kt	5 °C	116 kt	9 h 03 min	4:15 am CDT (09:15 UTC)
14,500 ft	300° at 16 kt	+3 kt	0 °C	117 kt	8 h 58 min	4:10 am CDT (09:10 UTC)
16,500 ft	310° at 17 kt	+2 kt	-4 °C	118 kt	8 h 54 min	4:06 am CDT (09:06 UTC)
18,000 ft FL180	310° at 18 kt	+1 kt	-7 °C	119 kt	8 h 49 min	4:01 am CDT (09:01 UTC)
24,000 ft FL240	320° at 23 kt	−1 kt	-17 °C	121 kt	8 h 41 min	3:53 am CDT (08:53 UTC)
30,000 ft FL300	310° at 38 kt	0	-32 °C	120 kt	8 h 45 min	3:57 am CDT (08:57 UTC)
34,000 ft FL340	310° at 40 kt	+3 kt	-41 °C	117 kt	8 h 58 min	4:10 am CDT (09:10 UTC)
39,000 ft FL390	310° at 41 kt	0	-50 °C	120 kt	8 h 45 min	3:57 am CDT (08:57 UTC)

Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 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
FWA	used from 0 nm out; 82 nm from the line	350/9	350/24 15°	360/25 9°	360/29 4°	350/31 -10°	340/39 -22°	330/40 -37°	320/38 -43°	320/48 -48°
IND	used from 149 nm out; 34 nm from the line	320/10	350/30 16°	350/32 10°	350/30 4°	340/31 -10°	340/42 -21°	340/49 -37°	320/46 -41°	320/47 -47°
EVV	used from 248 nm out; 68 nm from the line	310/13	340/26 16°	330/29 10°	330/32 4°	330/30 -9°	340/38 -20°	330/60 -35°	320/57 -41°	330/39 -48°
CGI	used from 347 nm out; 45 nm from the line	250/10	290/12 17°	290/18 11°	300/22 5°	320/25 -8°	330/30 -18°	320/53 -33°	320/66 -42°	320/56 -50°
LIT	used from 495 nm out; 93 nm from the line	220/12	250/12 17°	250/18 12°	260/22 6°	310/14 -5°	310/25 -17°	310/40 -31°	310/38 -41°	310/46 -52°
FSM	used from 644 nm out; 70 nm from the line	200/18	210/19 15°	230/22 13°	250/18 7°	270/20 -5°	280/24 -16°	280/35 -30°	290/37 -40°	300/40 -52°
SHV	used from 694 nm out; 80 nm from the line	190/11	230/19 17°	230/26 12°	260/15 7°	280/16 -4°	300/17 -15°	300/34 -30°	300/31 -41°	310/42 -52°
DAL	used from 793 nm out; 69 nm from the line	180/21	190/24 15°	230/20 12°	220/23 8°	240/22 -5°	230/18 -15°	280/33 -29°	280/36 -39°	300/33 -52°
CLL	used from 892 nm out; 46 nm from the line	160/18	190/18 16°	200/19 12°	220/14 7°	260/18 -5°	250/20 -13°	290/29 -29°	290/31 -40°	300/22 -53°
SAT	used from 991 nm out; 35 nm from the line	130/22	140/24 18°	170/19 13°	190/13 7°	240/15 -4°	220/14 -13°	270/11 -28°	280/10 -40°	310/18 -51°

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
YIP Detroit, MI	departure	marginal VFR Sky: overcast at 2,200 feet	calm	10+ mi	2,200 ft	715 ft	7:53 pm EDT (23:53 UTC)
TOL Toledo, OH	40 nm out, 21 nm southeast of the line, tower	marginal VFR Sky: overcast at 2,200 feet	from the northwest (310°) at 4 knots	10+ mi	2,200 ft	683 ft	23:52 UTC
FWA Fort Wayne, IN	109 nm out, 6 nm east of the line, tower	VFR Sky: scattered clouds at 1,800 feet, scattered clouds at 25,000 feet	from the east-southeast (110°) at 3 knots	10+ mi	none	814 ft	23:57 UTC
HUF Terre Haute, IN	238 nm out, 6 nm southeast of the line, tower	VFR	from the northeast (050°) at 3 knots	10+ mi	none	589 ft	23:53 UTC
MDH Carbondale/Murphysboro, IL	377 nm out, 12 nm southeast of the line, tower	VFR	from the south (180°) at 6 knots	10+ mi	none	411 ft	23:52 UTC
CVK Ash Flat, AR	515 nm out, 5 nm west of the line	no report just now				717 ft
BDQ Morrilton, AR	604 nm out, 1 nm south of the line	VFR	from the south (170°) at 3 knots	10+ mi	none	321 ft	23:55 UTC
TXK Texarkana, AR	723 nm out, 21 nm southeast of the line, tower	VFR	from the south (170°) at 3 knots	10+ mi	none	389 ft	23:53 UTC
TYR Tyler, TX	822 nm out, 12 nm southeast of the line, tower	VFR	from the south-southeast (150°) at 6 knots	10+ mi	none	543 ft	23:53 UTC
LXY Mexia, TX	892 nm out, 5 nm north of the line	VFR	from the south-southeast (150°) at 7 knots	10+ mi	none	544 ft	23:55 UTC
EDC Austin, TX	981 nm out, 3 nm southeast of the line, tower	VFR	from the south-southeast (150°) at 9 knots	10+ mi	none	620 ft	23:35 UTC
SAT San Antonio, TX	destination	VFR Sky: a few clouds at 6,500 feet, a few clouds at 20,000 feet	from the south-southeast (150°) at 10 knots, gusting to 20	10+ mi	none	809 ft	6:51 pm CDT (23:51 UTC)

The highest airport on this list sits at 814 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At SAT when you get there the forecast at the estimated arrival, 3:53 am CDT (08:53 UTC)

Wind from the southeast at 9 knots, visibility more than 6 miles, scattered clouds at 1,200 feet VFR

The whole forecast for SAT

From Sun 7:00 pm CDT (00:00 UTC): wind from the south-southeast at 15 knots, visibility more than 6 miles, a few clouds at 6,000 feet, scattered clouds at 25,000 feet
From Mon 12:00 am CDT (05:00 UTC): wind from the southeast at 9 knots, visibility more than 6 miles, scattered clouds at 1,200 feet
From Mon 6:00 am CDT (11:00 UTC): wind from the east-southeast at 5 knots, visibility more than 6 miles, a broken layer at 1,200 feet
From Mon 12:00 pm CDT (17:00 UTC): wind from the south-southeast at 8 knots, visibility more than 6 miles, a broken layer at 2,500 feet
From Mon 2:00 pm CDT (19:00 UTC): wind from the south at 11 knots, visibility more than 6 miles, a broken layer at 5,000 feet

The forecast for YIP, the departure

From Sun 8:00 pm EDT (00:00 UTC): wind from the northeast at 4 knots, visibility more than 6 miles, a broken layer at 1,000 feet, overcast at 1,500 feet
From Sun 11:00 pm EDT (03:00 UTC): wind light and variable, visibility more than 6 miles, overcast at 1,400 feet
From Mon 3:00 am EDT (07:00 UTC): wind from the south-southwest at 4 knots, visibility more than 6 miles, a broken layer at 25,000 feet
At times between Mon 5:00 am EDT (09:00 UTC) and 9:00 am EDT (13:00 UTC): visibility 2 miles, mist, a broken layer at 400 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the southwest at 11 knots, gusting to 22, visibility more than 6 miles, a broken layer at 25,000 feet

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

6/5849 Austin, TX, Friday, October 2, 2026 through Monday, October 12, 2026 UTC 1 nm from the route, 991 nm along the route · drones kept away from a public gathering · until 12 October · ZHU

Daylight

Sunset at YIP 6:57 pm EDT (22:57 UTC), at SAT 7:06 pm CDT (00:06 UTC) (civil twilight ends 7:30 pm CDT (00:30 UTC)). At 120 knots the arrival at SAT is before sunrise there (7:33 am CDT (12:33 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 lower 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: Willow Run Airport, San Antonio International.