Plan a flight · Mon 7:59 am MDT (13:59 UTC)

Yellowstone Regional to Chicago O'Hare International COD → ORD

933 nautical miles (1,074 statute miles) east on a straight line, true course 092°, about 081° magnetic at the departure end (variation 11E). At 120 knots that is 5 h 22 min at the quickest height in today's winds (39,000 ft, a 54-knot tailwind), arriving about 2:21 pm CDT (19:21 UTC). Right now COD is IFR, wind from the north-northeast (030°) at 9 knots; ORD is VFR, wind from the south-southwest (210°) at 10 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: 21 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 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the first 566 nm of the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the first 50 nm of the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 79 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 COD.

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

UAL1095 at 36,000 ft, 41 nm south, 7:34 am MDT (13:34 UTC): light turbulence, -38 °C, wind 236° at 61 knots. 288 nm along the route, 41 nm south of the line.
as filed, and in English
```
ARP UAL1095 4328N 10223W 1334 F360 MS38 236/061KT TB LIGHT SK IC
```
Report
a routine report filed through ARP
SF50 at 4,000 ft, 26 nm north, 7:47 am MDT (13:47 UTC): no turbulence, no icing. 377 nm along the route, 26 nm north of the line.
as filed, and in English
```
PIR UA /OV PIR/TM 1347/FL040/TP SF50/SK BASE008-TOP040/TB NEG/IC NEG
```
Report
a routine report filed through PIR
Where
over PIR
Time
13:47 UTC
Height
at 4,000 ft
Aircraft
SF50
Sky
BASE008-TOP040
Turbulence
none
Icing
none
UAL1095 at 36,000 ft, 7 nm northeast, 7:00 am MDT (13:00 UTC): no turbulence, -41 °C, wind 253° at 52 knots. 526 nm along the route, 7 nm northeast of the line.
as filed, and in English
```
ARP UAL1095 4338N 09646W 1300 F360 MS41 253/052KT TB NONE SK CLEAR IC
```
Report
a routine report filed through ARP
B38M at 32,000 ft, 24 nm south, 5:45 am MDT (11:45 UTC): light chop turbulence. 586 nm along the route, 24 nm south of the line.
as filed, and in English
```
FOD UA /OV FOD285060/TM 1145/FL320/TP B38M/TB CONS LGT CHOP OCNL MOD CHOP
```
Report
a routine report filed through FOD
Where
60 nm west (285°) of FOD
Time
11:45 UTC
Height
at 32,000 ft
Aircraft
B38M
Turbulence
continuous light chop occasional moderate chop
BE36 at 6,000 ft, 26 nm north, 7:12 am MDT (13:12 UTC): no turbulence. 635 nm along the route, 26 nm north of the line.
as filed, and in English
```
FRM UA /OV FRM/TM 1312/FL060/TP BE36/TB NEG
```
Report
a routine report filed through FRM
Where
over FRM
Time
13:12 UTC
Height
at 6,000 ft
Aircraft
BE36
Turbulence
none
B38M at 32,000 ft, 22 nm south, 5:35 am MDT (11:35 UTC): light chop turbulence above 32,000 ft. 685 nm along the route, 22 nm south of the line.
as filed, and in English
```
FOD UA /OV FOD075035/TM 1135/FL320/TP B38M/TB CONS LGT CHOP 320/INTMT LGT CHOP 340
```
Report
a routine report filed through FOD
Where
35 nm east (075°) of FOD
Time
11:35 UTC
Height
at 32,000 ft
Aircraft
B38M
Turbulence
continuous light chop 320/INTMT light chop at 34,000 ft
P46T at 31,000 ft, 19 nm south, 7:37 am MDT (13:37 UTC): light chop turbulence. 725 nm along the route, 19 nm south of the line.
as filed, and in English
```
ALO UA /OV ALO270005/TM 1337/FL310/TP P46T/TB INTMT LGT CHOP
```
Report
a routine report filed through ALO
Where
5 nm west (270°) of ALO
Time
13:37 UTC
Height
at 31,000 ft
Aircraft
P46T
Turbulence
intermittent light chop
A321 at 32,000 ft, 41 nm south, 6:25 am MDT (12:25 UTC): light chop turbulence. 764 nm along the route, 41 nm south of the line.
as filed, and in English
```
CID UA /OV CID360010/TM 1225/FL320/TP A321/TB INTMT LGT CHOP CONS LGT CHOP
```
Report
a routine report filed through CID
Where
10 nm north (360°) of CID
Time
12:25 UTC
Height
at 32,000 ft
Aircraft
A321
Turbulence
intermittent light chop continuous light chop
B752 at 34,000 ft, 4 nm southeast, 6:23 am MDT (12:23 UTC): light chop turbulence. 784 nm along the route, 4 nm southeast of the line.
as filed, and in English
```
DBQ UA /OV DBQ300020/TM 1223/FL340/TP B752/TB OCNL LGT CHOP
```
Report
a routine report filed through DBQ
Where
20 nm northwest (300°) of DBQ
Time
12:23 UTC
Height
at 34,000 ft
Aircraft
B752
Turbulence
occasional light chop
PC12 at 20,000 ft, 44 nm north, 7:27 am MDT (13:27 UTC): no turbulence. 814 nm along the route, 44 nm north of the line.
as filed, and in English
```
LNR UA /OV 0WI4/TM 1327/FL200/TP PC12/TB NEG
```
Report
a routine report filed through LNR
Where
over 0WI4
Time
13:27 UTC
Height
at 20,000 ft
Aircraft
PC12
Turbulence
none
C510 at 17,000 ft, 44 nm north, 7:27 am MDT (13:27 UTC): no turbulence. 814 nm along the route, 44 nm north of the line.
as filed, and in English
```
LNR UA /OV LNR/TM 1327/FL170/TP C510/TB NEG
```
Report
a routine report filed through LNR
Where
over LNR
Time
13:27 UTC
Height
at 17,000 ft
Aircraft
C510
Turbulence
none
B39M at 36,000 ft, 14 nm northeast, 7:18 am MDT (13:18 UTC): no turbulence. At the destination end, 14 nm northeast of the line.
as filed, and in English
```
PWK UA /OV OBK/TM 1318/FL360/TP B39M/TB NEG
```
Report
a routine report filed through PWK
Where
over OBK
Time
13:18 UTC
Height
at 36,000 ft
Aircraft
B39M
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 (BIL, MLS, RAP, PIR, FSD, MCW, 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	240° at 26 kt	−20 kt		140 kt	6 h 40 min	3:39 pm CDT (20:39 UTC)
5,500 ft	250° at 20 kt	−18 kt	13 °C	138 kt	6 h 46 min	3:45 pm CDT (20:45 UTC)
7,500 ft	250° at 22 kt	−18 kt	14 °C	138 kt	6 h 46 min	3:45 pm CDT (20:45 UTC)
9,500 ft	240° at 24 kt	−19 kt	9 °C	139 kt	6 h 43 min	3:42 pm CDT (20:42 UTC)
11,500 ft	240° at 26 kt	−21 kt	5 °C	141 kt	6 h 37 min	3:36 pm CDT (20:36 UTC)
13,500 ft	240° at 26 kt	−20 kt	1 °C	140 kt	6 h 40 min	3:39 pm CDT (20:39 UTC)
15,500 ft	240° at 25 kt	−19 kt	-4 °C	139 kt	6 h 43 min	3:42 pm CDT (20:42 UTC)
17,500 ft	230° at 25 kt	−18 kt	-9 °C	138 kt	6 h 46 min	3:45 pm CDT (20:45 UTC)
18,000 ft FL180	230° at 25 kt	−18 kt	-10 °C	138 kt	6 h 46 min	3:45 pm CDT (20:45 UTC)
24,000 ft FL240	230° at 34 kt	−24 kt	-22 °C	144 kt	6 h 29 min	3:28 pm CDT (20:28 UTC)
30,000 ft FL300	250° at 39 kt	−34 kt	-34 °C	154 kt	6 h 04 min	3:03 pm CDT (20:03 UTC)
34,000 ft FL340	250° at 46 kt	−43 kt	-38 °C	163 kt	5 h 43 min	2:42 pm CDT (19:42 UTC)
39,000 ft FL390	260° at 55 kt	−54 kt	-47 °C	174 kt	5 h 22 min	2:21 pm CDT (19:21 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
BIL	used from 0 nm out; 78 nm from the line		300/14	270/19 -2°	260/26 -2°	220/28 -13°	210/51 -25°	220/56 -33°	220/61 -39°	220/72 -45°
MLS	used from 99 nm out; 122 nm from the line		290/17 -1°	250/18 0°	230/25 0°	220/31 -11°	220/32 -24°	220/50 -32°	220/60 -38°	230/71 -46°
RAP	used from 149 nm out; 85 nm from the line		250/28 16°	260/31 10°	240/25 4°	210/35 -10°	200/45 -23°	230/47 -31°	230/47 -36°	230/51 -46°
PIR	used from 298 nm out; 57 nm from the line		230/15 15°	220/22 14°	220/24 6°	200/32 -10°	210/48 -22°	240/45 -33°	240/43 -37°	250/55 -46°
FSD	used from 447 nm out; 61 nm from the line	210/20	230/23 21°	220/25 14°	230/30 5°	230/26 -9°	240/30 -21°	270/33 -36°	260/47 -37°	270/58 -47°
MCW	used from 596 nm out; 63 nm from the line	250/36	250/24 19°	240/26 11°	250/30 5°	270/22 -9°	260/30 -21°	260/31 -36°	280/53 -38°	280/66 -48°
DBQ	used from 745 nm out; 38 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 894 nm out; 34 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
COD Cody, WY	departure	IFR Sky: a broken layer at 500 feet, overcast at 1,600 feet	from the north-northeast (030°) at 9 knots	10+ mi	500 ft	5,102 ft	7:56 am MDT (13:56 UTC)
GEY Greybull, WY	40 nm out, 2 nm north of the line	marginal VFR Sky: overcast at 1,200 feet	from the northwest (310°) at 7 knots	10+ mi	1,200 ft	3,941 ft	13:53 UTC
GCC Gillette, WY	149 nm out, 2 nm south of the line	marginal VFR Sky: a few clouds at 1,300 feet, overcast at 2,400 feet Weather: mist	from the northwest (310°) at 14 knots	4 mi	2,400 ft	4,365 ft	13:53 UTC
RAP Rapid City, SD	258 nm out, 10 nm south of the line, tower	IFR Sky: a few clouds at 300 feet, a broken layer at 700 feet, overcast at 1,200 feet Weather: mist	from the east-northeast (070°) at 4 knots	3 mi	700 ft	3,203 ft	13:56 UTC
PHP Philip, SD	318 nm out, 4 nm southeast of the line	marginal VFR Sky: overcast at 1,600 feet	from the north-northeast (020°) at 6 knots	10+ mi	1,600 ft	2,209 ft	13:55 UTC
FSD Sioux Falls, SD	536 nm out, 4 nm northwest of the line, tower	VFR Sky: a few clouds at 10,000 feet, scattered clouds at 25,000 feet	from the northeast (050°) at 4 knots	10+ mi	none	1,430 ft	13:56 UTC
ISB Sibley, IA	576 nm out, 2 nm south of the line	no report just now				1,537 ft
ALO Waterloo, IA	735 nm out, 18 nm southwest of the line, tower	VFR	from the south (170°) at 4 knots	10+ mi	none	873 ft	13:54 UTC
DBQ Dubuque, IA	804 nm out, 9 nm south of the line, tower	VFR	from the south-southwest (200°) at 11 knots	10+ mi	none	1,076 ft	13:53 UTC
RFD Chicago/Rockford, IL	884 nm out, 5 nm west of the line, tower	VFR Sky: a few clouds at 12,000 feet, scattered clouds at 25,000 feet	from the south (170°) at 5 knots	10+ mi	none	742 ft	13:54 UTC
ORD Chicago, IL	destination	VFR Sky: a few clouds at 18,000 feet, a few clouds at 25,000 feet	from the south-southwest (210°) at 10 knots	10+ mi	none	680 ft	8:51 am CDT (13:51 UTC)

The highest airport on this list sits at 5,102 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, 2:21 pm CDT (19:21 UTC)

Wind from the south-southwest at 13 knots, gusting to 24, visibility more than 6 miles, a few clouds at 25,000 feet VFR

The whole forecast for ORD

From Mon 7:00 am CDT (12:00 UTC): wind from the south-southwest at 8 knots, visibility more than 6 miles, a broken layer at 25,000 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
From Mon 10:00 pm CDT (03:00 UTC): wind from the southwest at 11 knots, visibility more than 6 miles, low-level wind shear, a few clouds at 10,000 feet
From Tue 5:00 am CDT (10:00 UTC): wind from the west at 10 knots, visibility more than 6 miles, a few clouds at 20,000 feet

The forecast for COD, the departure

From Mon 6:00 am MDT (12:00 UTC): wind from the north-northeast at 10 knots, visibility more than 6 miles, a broken layer at 1,000 feet, overcast at 1,800 feet
From Mon 12:00 pm MDT (18:00 UTC): wind from the northeast at 4 knots, visibility more than 6 miles, scattered clouds at 1,500 feet, overcast at 3,000 feet
30% chance between Mon 4:00 pm MDT (22:00 UTC) and 8:00 pm MDT (02:00 UTC): visibility 6 miles, light showers rain snow
From Mon 8:00 pm MDT (02:00 UTC): wind from the east-northeast at 5 knots, visibility more than 6 miles, showers nearby, scattered clouds at 500 feet, a broken layer at 1,000 feet and more above

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 COD 6:35 pm MDT (00:35 UTC), at ORD 6:15 pm CDT (23:15 UTC) (civil twilight ends 6:43 pm CDT (23:43 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 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: Yellowstone Regional, Chicago O'Hare International.