Plan a flight · Mon 7:16 am CDT (12:16 UTC)

The Eastern Iowa Airport to San Antonio International CID → SAT

811 nautical miles (933 statute miles) southwest on a straight line, true course 206°, about 204° magnetic at the departure end (variation 2E). At 120 knots that is 6 h 36 min at the quickest height in today's winds (39,000 ft, a 3-knot tailwind), arriving about 1:52 pm CDT (18:52 UTC). 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

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 first 455 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 CID.

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

E45X at 32,000 ft, 24 nm east, 7:05 am CDT (12:05 UTC): moderate chop turbulence, remarks: zhu. 761 nm along the route, 24 nm east of the line.
as filed, and in English
```
AUS UA /OV KCWK090015/TM 1205/FL320/TP E45X/TB MOD CHOP/RM ZHU
```
Report
a routine report filed through AUS
Where
15 nm east (090°) of KCWK
Time
12:05 UTC
Height
at 32,000 ft
Aircraft
E45X
Turbulence
moderate chop
Remarks
zhu
B738 at 2,100 ft, 9 nm west, 6:55 am CDT (11:55 UTC): a routine report with nothing remarked on. 593 nm along the route, 9 nm west of the line.
as filed, and in English
```
DFW UA /OV 3 N OF DFW/TM 1155/FL021/TP B738/SK BASE021
```
Report
a routine report filed through DFW
Where
3 north of dfw
Time
11:55 UTC
Height
at 2,100 ft
Aircraft
B738
Sky
BASE021
E170 at 2,200 ft, 9 nm west, 6:42 am CDT (11:42 UTC): scattered clouds above 2,200 ft, remarks: haze layer on final at 2200 ft. 593 nm along the route, 9 nm west of the line.
as filed, and in English
```
DFW UA /OV DFW/TM 1142/FL022/TP E170/SK SCT022/RM HAZE LAYER ON FINAL AT 2200 FT
```
Report
a routine report filed through DFW
Where
over DFW
Time
11:42 UTC
Height
at 2,200 ft
Aircraft
E170
Sky
scattered clouds from 2,200 ft
Remarks
haze layer on final at 2200 ft
B737 at 2,500 ft, 24 nm east, 7:05 am CDT (12:05 UTC): remarks: B025 T045. 761 nm along the route, 24 nm east of the line.
as filed, and in English
```
AUS UA /OV 5N/TM 1205/FL025/TP B737/RM B025 T045
```
Report
a routine report filed through AUS
Where
5N
Time
12:05 UTC
Height
at 2,500 ft
Aircraft
B737
Remarks
B025 T045
B738 at 35,000 ft, 24 nm east, 6:58 am CDT (11:58 UTC): light chop turbulence, remarks: zhu. 761 nm along the route, 24 nm east of the line.
as filed, and in English
```
AUS UA /OV KCWK/TM 1158/FL350/TP B738/TB INTMT LGT CHOP/RM ZHU
```
Report
a routine report filed through AUS
Where
over KCWK
Time
11:58 UTC
Height
at 35,000 ft
Aircraft
B738
Turbulence
intermittent light chop
Remarks
zhu
B738 at 38,000 ft, 24 nm east, 6:22 am CDT (11:22 UTC): no turbulence, remarks: zhu. 761 nm along the route, 24 nm east of the line.
as filed, and in English
```
AUS UA /OV KCWK360015/TM 1122/FL380/TP B738/TB NEG/RM ZHU
```
Report
a routine report filed through AUS
Where
15 nm north (360°) of KCWK
Time
11:22 UTC
Height
at 38,000 ft
Aircraft
B738
Turbulence
none
Remarks
zhu
B748 at 40,000 ft, 24 nm east, 6:17 am CDT (11:17 UTC): no turbulence, remarks: smooth zhu. 761 nm along the route, 24 nm east of the line.
as filed, and in English
```
AUS UA /OV KCWK270015/TM 1117/FL400/TP B748/TB NEG/RM SMOOTH ZHU
```
Report
a routine report filed through AUS
Where
15 nm west (270°) of KCWK
Time
11:17 UTC
Height
at 40,000 ft
Aircraft
B748
Turbulence
none
Remarks
smooth zhu
B737 at 1,800 ft, 4 nm southwest, 6:18 am CDT (11:18 UTC): remarks: KSAT base 1,800 ft, on top 3,500 ft. At the destination end, 4 nm southwest of the line.
as filed, and in English
```
SAT UA /OV SAT/TM 1118/FL018/TP B737/RM KSAT BASE 018, ON TOP 035
```
Report
a routine report filed through SAT
Where
over SAT
Time
11:18 UTC
Height
at 1,800 ft
Aircraft
B737
Remarks
KSAT base 1,800 ft, on top 3,500 ft
A320 at 2,300 ft, 4 nm southwest, 5:37 am CDT (10:37 UTC): remarks: KSAT base 2,300 ft, on top 4,000 ft. At the destination end, 4 nm southwest of the line.
as filed, and in English
```
SAT UA /OV SAT/TM 1037/FL023/TP A320/RM KSAT BASE 023, ON TOP 040
```
Report
a routine report filed through SAT
Where
over SAT
Time
10:37 UTC
Height
at 2,300 ft
Aircraft
A320
Remarks
KSAT base 2,300 ft, on top 4,000 ft

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 9 forecast points nearest it (BRL, COU, MKC, SGF, TUL, FSM, 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	220° at 25 kt	+24 kt		96 kt	8 h 27 min	3:43 pm CDT (20:43 UTC)
6,500 ft	230° at 19 kt	+17 kt	16 °C	103 kt	7 h 52 min	3:08 pm CDT (20:08 UTC)
8,500 ft	230° at 16 kt	+15 kt	14 °C	105 kt	7 h 43 min	2:59 pm CDT (19:59 UTC)
10,500 ft	230° at 14 kt	+12 kt	10 °C	108 kt	7 h 31 min	2:47 pm CDT (19:47 UTC)
12,500 ft	240° at 14 kt	+11 kt	6 °C	109 kt	7 h 26 min	2:42 pm CDT (19:42 UTC)
14,500 ft	250° at 17 kt	+12 kt	1 °C	108 kt	7 h 31 min	2:47 pm CDT (19:47 UTC)
16,500 ft	250° at 20 kt	+14 kt	-3 °C	106 kt	7 h 39 min	2:55 pm CDT (19:55 UTC)
18,000 ft FL180	250° at 21 kt	+15 kt	-6 °C	105 kt	7 h 43 min	2:59 pm CDT (19:59 UTC)
24,000 ft FL240	260° at 27 kt	+17 kt	-16 °C	103 kt	7 h 52 min	3:08 pm CDT (20:08 UTC)
30,000 ft FL300	270° at 46 kt	+16 kt	-30 °C	104 kt	7 h 48 min	3:04 pm CDT (20:04 UTC)
34,000 ft FL340	280° at 46 kt	+10 kt	-39 °C	110 kt	7 h 22 min	2:38 pm CDT (19:38 UTC)
39,000 ft FL390	300° at 45 kt	−3 kt	-50 °C	123 kt	6 h 36 min	1:52 pm CDT (18:52 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
BRL	used from 0 nm out; 58 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°
COU	used from 99 nm out; 79 nm from the line	250/36	260/14 16°	250/5 12°	260/12 6°	260/24 -7°	260/35 -19°	280/58 -31°	280/62 -40°	290/60 -49°
MKC	used from 148 nm out; 59 nm from the line	240/49	240/21 20°	220/19 13°	230/21 6°	260/26 -7°	250/37 -19°	270/66 -31°	270/65 -38°	280/60 -48°
SGF	used from 247 nm out; 51 nm from the line	230/37	260/20 15°	250/16 13°	250/15 8°	260/28 -7°	250/31 -17°	280/59 -31°	280/59 -39°	290/55 -50°
TUL	used from 346 nm out; 40 nm from the line	230/42	250/23 17°	220/16 14°	240/10 8°	240/20 -6°	260/28 -17°	270/61 -29°	280/52 -38°	290/46 -50°
FSM	used from 445 nm out; 82 nm from the line	230/33	260/23 15°	240/23 11°	230/18 8°	230/20 -8°	250/31 -17°	280/51 -30°	280/52 -39°	300/47 -51°
DAL	used from 494 nm out; 76 nm from the line	190/30	200/28 18°	220/18 13°	250/13 8°	240/24 -6°	270/20 -14°	270/35 -29°	290/34 -39°	310/41 -51°
CLL	used from 692 nm out; 77 nm from the line	180/24	170/21 19°	180/10 14°	230/7 8°	230/16 -6°	260/20 -13°	290/23 -29°	320/21 -39°	340/35 -51°
SAT	used from 742 nm out; 44 nm from the line	160/18	180/22 17°	190/16 14°	210/16 9°	220/16 -5°	200/11 -14°	250/8 -29°	330/8 -40°	020/26 -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	Elevation
CID Cedar Rapids, IA	departure	no report just now	869 ft
OTM Ottumwa, IA	59 nm out, 10 nm northwest of the line	no report just now	845 ft
IRK Kirksville, MO	109 nm out, 13 nm southeast of the line	no report just now	966 ft
RCM Warrensburg, MO	208 nm out, 7 nm west of the line	no report just now	797 ft
JLN Joplin, MO	316 nm out, 6 nm northeast of the line, tower	no report just now	977 ft
GMJ Grove, OK	346 nm out, 7 nm southeast of the line	no report just now	831 ft
MLC Mc Alester, OK	465 nm out, 3 nm northeast of the line	no report just now	770 ft
GYI Sherman/Denison, TX	544 nm out, 11 nm northwest of the line, tower	no report just now	749 ft
DAL Dallas, TX	593 nm out, 2 nm south of the line, tower	no report just now	486 ft
GRK Fort Hood (Killeen), TX	712 nm out, 4 nm west of the line, tower	no report just now	1,015 ft
GTU Georgetown, TX	732 nm out, 12 nm east of the line, tower	no report just now	789 ft
SAT San Antonio, TX	destination	no report just now	809 ft

The highest airport on this list sits at 1,015 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, 1:52 pm CDT (18:52 UTC)

SAT has no terminal forecast; use the nearest airport that does.

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

9/2934 DALLAS, TX 1 nm from the route, 593 nm along the route · a VIP movement · ZFW
6/8646 Arlington, TX, Thursday, October 15, 2026 through Friday, October 16, 2026 UTC 7 nm from the route, 603 nm along the route · drones kept away from a public gathering · starts Thursday 15 October · ZFW
6/0543 MCGREGOR, TX 6 nm from the route, 692 nm along the route · security · ZFW

Daylight

Sunset at CID 6:30 pm CDT (23:30 UTC), at SAT 7:05 pm CDT (00:05 UTC) (civil twilight ends 7:29 pm CDT (00:29 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 southern Plains · 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: The Eastern Iowa Airport, San Antonio International.