Chicago O'Hare International to St. Louis Lambert International ORD → STL
224 nautical miles (258 statute miles) southwest on a straight line, true course 211°, about 214° magnetic at the departure end (variation 3W). At 120 knots that is 1 h 54 min at the quickest height in today's winds (39,000 ft, a 2-knot headwind), arriving about 12:23 am CDT (05:23 UTC), after sunset at the destination. Right now ORD is VFR, wind from the south (180°) at 7 knots; STL is VFR, wind from the south (170°) at 8 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: 10,220 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 ORD.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
No pilot reports within 50 nautical miles of the line in the last three hours.
Winds aloft along the route, and the time en route the forecast for use 02:00–09:00 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 3 forecast points nearest it (JOT, SPI, STL). 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 22 kt | +17 kt | 103 kt | 2 h 10 min | 12:39 am CDT (05:39 UTC) | |
| 6,500 ft | 260° at 22 kt | +15 kt | 15 °C | 105 kt | 2 h 08 min | 12:37 am CDT (05:37 UTC) |
| 8,500 ft | 260° at 22 kt | +15 kt | 10 °C | 105 kt | 2 h 08 min | 12:37 am CDT (05:37 UTC) |
| 10,500 ft | 260° at 17 kt | +11 kt | 8 °C | 109 kt | 2 h 03 min | 12:32 am CDT (05:32 UTC) |
| 12,500 ft | 260° at 13 kt | +8 kt | 4 °C | 112 kt | 2 h | 12:29 am CDT (05:29 UTC) |
| 14,500 ft | 270° at 16 kt | +9 kt | 0 °C | 111 kt | 2 h 01 min | 12:30 am CDT (05:30 UTC) |
| 16,500 ft | 270° at 20 kt | +10 kt | -4 °C | 110 kt | 2 h 02 min | 12:31 am CDT (05:31 UTC) |
| 18,000 ft FL180 | 270° at 23 kt | +10 kt | -7 °C | 110 kt | 2 h 02 min | 12:31 am CDT (05:31 UTC) |
| 24,000 ft FL240 | 270° at 30 kt | +13 kt | -19 °C | 107 kt | 2 h 06 min | 12:35 am CDT (05:35 UTC) |
| 30,000 ft FL300 | 290° at 28 kt | +7 kt | -33 °C | 113 kt | 1 h 59 min | 12:28 am CDT (05:28 UTC) |
| 34,000 ft FL340 | 290° at 49 kt | +9 kt | -42 °C | 111 kt | 2 h 01 min | 12:30 am CDT (05:30 UTC) |
| 39,000 ft FL390 | 300° at 59 kt | +2 kt | -52 °C | 118 kt | 1 h 54 min | 12:23 am CDT (05:23 UTC) |
Based on data from the 12th at 00:00 UTC; valid on the 12th at 06:00 UTC for use 02:00 to 09:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| JOT | used from 0 nm out; 7 nm from the line | 250/23 | 270/22 15° | 250/16 10° | 240/9 4° | 280/22 -7° | 280/29 -19° | 300/29 -34° | 290/50 -43° | 300/64 -52° |
| SPI | used from 97 nm out; 30 nm from the line | 220/21 | 250/23 16° | 260/27 9° | 270/14 6° | 270/23 -7° | 270/31 -19° | 270/28 -33° | 290/48 -42° | 300/55 -52° |
| STL | used from 195 nm out; 15 nm from the line | 250/24 | 250/24 16° | 260/23 9° | 270/16 6° | 260/25 -6° | 270/29 -19° | 290/34 -33° | 290/48 -41° | 290/54 -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 |
|---|---|---|---|---|---|---|---|
| ORD Chicago, IL | departure | VFR | from the south (180°) at 7 knots | 10+ mi | none | 680 ft | 9:51 pm CDT (02:51 UTC) |
| LOT Chicago/Romeoville, IL | 19 nm out, 6 nm south of the line, tower | VFR | from the south-southeast (150°) at 5 knots | 10+ mi | none | 679 ft | 03:15 UTC |
| PNT Pontiac, IL | 68 nm out, 5 nm southeast of the line | VFR | from the south-southeast (160°) at 3 knots | 10+ mi | none | 666 ft | 03:15 UTC |
| BMI Bloomington/Normal, IL | 97 nm out, 7 nm southeast of the line, tower | VFR | from the south (180°) at 5 knots | 10+ mi | none | 871 ft | 02:56 UTC |
| SPI Springfield, IL | 146 nm out, 7 nm west of the line, tower | VFR | from the south-southeast (160°) at 6 knots | 10+ mi | none | 597 ft | 02:52 UTC |
| ALN Alton/St Louis, IL | 205 nm out, 10 nm southeast of the line, tower | VFR | from the south-southeast (160°) at 3 knots | 10+ mi | none | 543 ft | 03:15 UTC |
| STL St Louis, MO | destination | VFR Sky: scattered clouds at 25,000 feet | from the south (170°) at 8 knots | 10+ mi | none | 617 ft | 9:51 pm CDT (02:51 UTC) |
The highest airport on this list sits at 871 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At STL when you get there the forecast at the estimated arrival, 12:23 am CDT (05:23 UTC)
Wind from the south at 6 knots, visibility more than 6 miles, scattered clouds at 25,000 feet VFR
The whole forecast for STL
- From Sun 10:00 pm CDT (03:00 UTC): wind from the south at 6 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
- From Mon 1:00 am CDT (06:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
- From Mon 11:00 am CDT (16:00 UTC): wind from the southwest at 12 knots, gusting to 20, visibility more than 6 miles, a few clouds at 25,000 feet
The forecast for ORD, the departure
- From Sun 10:00 pm CDT (03:00 UTC): wind from the south at 5 knots, visibility more than 6 miles, scattered clouds at 30,000 feet
- From Mon 12:00 pm CDT (17:00 UTC): wind from the south-southwest at 13 knots, gusting to 24, visibility more than 6 miles, a few clouds at 25,000 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
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 ORD 6:15 pm CDT (23:15 UTC), at STL 6:27 pm CDT (23:27 UTC) (civil twilight ends 6:54 pm CDT (23:54 UTC)). At 120 knots the arrival at STL is before sunrise there (7:07 am CDT (12:07 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: Chicago O'Hare International, St. Louis Lambert International.