San Antonio International to Chicago O'Hare International SAT → ORD
906 nautical miles (1,042 statute miles) northeast on a straight line, true course 032°, about 028° magnetic at the departure end (variation 4E). At 120 knots that is 6 h 37 min at the quickest height in today's winds (9,500 ft, a 17-knot tailwind), arriving about 3:16 am CDT (08:16 UTC), after sunset at the destination. Right now SAT is VFR, wind from the south-southeast (150°) at 11 knots; ORD is VFR, wind from the south (180°) 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: 3,868 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
No SIGMET or AIRMET covers any part of this route right now.
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 SAT.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- B39M at 35,000 ft, 29 nm southeast, 7:29 pm CDT (00:29 UTC): no turbulence, remarks: smooth. At the destination end, 29 nm southeast of the line.
as filed, and in English
IKK UA /OV CGT/TM 0029/FL350/TP B39M/TB NEG/RM SMOOTH
- Report
- a routine report filed through IKK
- Where
- over CGT
- Time
- 00:29 UTC
- Height
- at 35,000 ft
- Aircraft
- B39M
- Turbulence
- none
- Remarks
- smooth
- CRJ7 at 17,000 ft, 41 nm east, 7:04 pm CDT (00:04 UTC): no turbulence. At the destination end, 41 nm east of the line.
as filed, and in English
BEH UA /OV ELX270040/TM 0004/FL170/TP CRJ7/TB NEG
- Report
- a routine report filed through BEH
- Where
- 40 nm west (270°) of ELX
- Time
- 00:04 UTC
- Height
- at 17,000 ft
- Aircraft
- CRJ7
- Turbulence
- none
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 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 9 forecast points nearest it (SAT, CLL, DAL, FSM, SGF, COU, STL, SPI, 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 | 200° at 16 kt | −15 kt | 135 kt | 6 h 43 min | 3:22 am CDT (08:22 UTC) | |
| 5,500 ft | 210° at 15 kt | −15 kt | 135 kt | 6 h 43 min | 3:22 am CDT (08:22 UTC) | |
| 7,500 ft | 230° at 17 kt | −16 kt | 14 °C | 136 kt | 6 h 40 min | 3:19 am CDT (08:19 UTC) |
| 9,500 ft | 240° at 19 kt | −17 kt | 11 °C | 137 kt | 6 h 37 min | 3:16 am CDT (08:16 UTC) |
| 11,500 ft | 250° at 17 kt | −14 kt | 7 °C | 134 kt | 6 h 46 min | 3:25 am CDT (08:25 UTC) |
| 13,500 ft | 260° at 17 kt | −12 kt | 3 °C | 132 kt | 6 h 52 min | 3:31 am CDT (08:31 UTC) |
| 15,500 ft | 270° at 17 kt | −11 kt | -1 °C | 131 kt | 6 h 55 min | 3:34 am CDT (08:34 UTC) |
| 17,500 ft | 270° at 18 kt | −9 kt | -5 °C | 129 kt | 7 h 01 min | 3:40 am CDT (08:40 UTC) |
| 18,000 ft FL180 | 270° at 18 kt | −9 kt | -6 °C | 129 kt | 7 h 01 min | 3:40 am CDT (08:40 UTC) |
| 24,000 ft FL240 | 290° at 19 kt | −6 kt | -17 °C | 126 kt | 7 h 11 min | 3:50 am CDT (08:50 UTC) |
| 30,000 ft FL300 | 300° at 35 kt | −4 kt | -31 °C | 124 kt | 7 h 18 min | 3:57 am CDT (08:57 UTC) |
| 34,000 ft FL340 | 300° at 39 kt | −3 kt | -41 °C | 123 kt | 7 h 22 min | 4:01 am CDT (09:01 UTC) |
| 39,000 ft FL390 | 310° at 45 kt | +2 kt | -51 °C | 118 kt | 7 h 41 min | 4:20 am CDT (09:20 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SAT | used from 0 nm out; 25 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° |
| CLL | used from 50 nm out; 70 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° |
| DAL | used from 149 nm out; 52 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° |
| FSM | used from 299 nm out; 83 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° |
| SGF | used from 448 nm out; 66 nm from the line | 210/21 | 210/21 16° | 240/28 12° | 260/24 7° | 280/21 -6° | 280/26 -18° | 290/38 -31° | 290/37 -41° | 300/49 -52° |
| COU | used from 597 nm out; 48 nm from the line | 210/16 | 220/19 15° | 240/33 10° | 250/29 7° | 280/21 -6° | 280/19 -18° | 300/34 -31° | 300/40 -42° | 300/60 -52° |
| STL | used from 647 nm out; 29 nm from the line | 210/13 | 260/16 17° | 270/21 10° | 280/24 5° | 310/20 -7° | 320/22 -18° | 320/44 -33° | 320/59 -43° | 310/69 -51° |
| SPI | used from 697 nm out; 36 nm from the line | 210/13 | 260/11 17° | 270/18 10° | 290/21 4° | 310/20 -8° | 330/25 -19° | 320/49 -34° | 320/60 -44° | 320/59 -50° |
| JOT | used from 796 nm out; 56 nm from the line | 230/11 | 290/12 16° | 300/19 10° | 320/19 4° | 300/17 -9° | 330/31 -20° | 320/49 -37° | 320/53 -45° | 320/67 -49° |
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 |
|---|---|---|---|---|---|---|---|
| SAT San Antonio, TX | departure | VFR Sky: a few clouds at 20,000 feet | from the south-southeast (150°) at 11 knots | 10+ mi | none | 809 ft | 7:51 pm CDT (00:51 UTC) |
| GTU Georgetown, TX | 80 nm out, 1 nm northwest of the line, tower | VFR | from the south-southeast (150°) at 7 knots | 10+ mi | none | 789 ft | 00:55 UTC |
| CNW Waco, TX | 149 nm out, 7 nm west of the line, tower | VFR | from the south-southeast (150°) at 6 knots | 10+ mi | none | 470 ft | 01:15 UTC |
| GVT Greenville, TX | 249 nm out, 9 nm west of the line, tower | VFR | from the south-southeast (160°) at 10 knots | 10+ mi | none | 534 ft | 23:15 UTC |
| PRX Paris, TX | 289 nm out, 3 nm north of the line | VFR | from the southeast (140°) at 7 knots | 10+ mi | none | 547 ft | 00:55 UTC |
| FSM Fort Smith, AR | 408 nm out, 13 nm northwest of the line, tower | VFR | from the south (190°) at 6 knots | 10+ mi | none | 469 ft | 00:53 UTC |
| BBG Branson, MO | 498 nm out, 6 nm northwest of the line, tower | VFR | from the south (180°) at 4 knots | 10+ mi | none | 1,302 ft | 00:45 UTC |
| TBN Fort Leonard Wood, MO | 587 nm out, 6 nm west of the line, tower | VFR | from the south (170°) at 6 knots | 10+ mi | none | 1,159 ft | 00:55 UTC |
| SUS St Louis, MO | 667 nm out, 20 nm southeast of the line, tower | VFR | from the south-southeast (150°) at 5 knots | 10+ mi | none | 463 ft | 00:54 UTC |
| SPI Springfield, IL | 756 nm out, 14 nm southeast of the line, tower | VFR | from the south-southeast (160°) at 6 knots | 10+ mi | none | 597 ft | 00:52 UTC |
| LOT Chicago/Romeoville, IL | 886 nm out, 7 nm southeast of the line, tower | VFR | from the south-southeast (150°) at 5 knots | 10+ mi | none | 679 ft | 01:15 UTC |
| ORD Chicago, IL | destination | VFR Sky: a few clouds at 25,000 feet | from the south (180°) at 7 knots | 10+ mi | none | 680 ft | 7:51 pm CDT (00:51 UTC) |
The highest airport on this list sits at 1,302 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At ORD when you get there the forecast at the estimated arrival, 3:16 am CDT (08:16 UTC)
Wind from the south at 6 knots, visibility more than 6 miles, clear skies VFR
The whole forecast for ORD
- From Sun 7:00 pm CDT (00:00 UTC): wind from the south at 6 knots, visibility more than 6 miles, clear skies
- From Mon 12:00 pm CDT (17:00 UTC): wind from the south-southwest at 13 knots, gusting to 23, visibility more than 6 miles, scattered clouds at 20,000 feet
- From Mon 6:00 pm CDT (23:00 UTC): wind from the south-southwest at 12 knots, visibility more than 6 miles, a few clouds at 12,000 feet
The forecast for SAT, the departure
- 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
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 7 nm from the route, 60 nm along the route · drones kept away from a public gathering · until 12 October · ZHU
- 6/0543 MCGREGOR, TX 14 nm from the route, 119 nm along the route · security · ZFW
Daylight
Sunset at SAT 7:06 pm CDT (00:06 UTC), at ORD 6:15 pm CDT (23:15 UTC) (civil twilight ends 6:43 pm CDT (23:43 UTC)). At 120 knots the arrival at ORD is before sunrise there (7:00 am CDT (12:00 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
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: San Antonio International, Chicago O'Hare International.