Plan a flight · Mon 3:09 am CDT (08:09 UTC)

University Of Illinois/Willard Airport to Oakland San Francisco Bay Airport CMI → OAK

1,583 nautical miles (1,822 statute miles) west on a straight line, true course 276°, about 279° magnetic at the departure end (variation 3W). At 120 knots that is 15 h 22 min at the quickest height in today's winds (4,500 ft, a 17-knot headwind), arriving about 4:31 pm PDT (23:31 UTC). Right now CMI is VFR, wind from the south (180°) at 6 knots; OAK is VFR, wind from the southeast (140°) at 5 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: 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 3W: 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 route from 129 to 617 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 687 to 1245 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 42,000 ft. Over the route from 697 to 1095 nm out.
AIRMET TANGO 1W: 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 route from 757 to 916 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 816 to 1344 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 826 to 1364 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 139 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 CMI.

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

B737 at 18,000 ft, 25 nm north, 2:24 am CDT (07:24 UTC): moderate turbulence, remarks: FL180-130. 767 nm along the route, 25 nm north of the line.
as filed, and in English
```
DEN UA /OV DEN330050/TM 0724/FL180/TP B737/TB MOD/RM FL180-130
```
Report
a routine report filed through DEN
Where
50 nm northwest (330°) of DEN
Time
07:24 UTC
Height
at 18,000 ft
Aircraft
B737
Turbulence
moderate
Remarks
FL180-130
B737 descending, 23 nm south, 2:10 am CDT (07:10 UTC): remarks: smooth. 757 nm along the route, 23 nm south of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0710/FLDURD/TP B737/RM SMOOTH
```
Report
a routine report filed through DEN
Where
over DEN
Time
07:10 UTC
Height
during the descent
Aircraft
B737
Remarks
smooth
B738 descending, 23 nm south, 1:15 am CDT (06:15 UTC): light chop turbulence. 757 nm along the route, 23 nm south of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0615/FLDURD/TP B738/TB LGT CHOP
```
Report
a routine report filed through DEN
Where
over DEN
Time
06:15 UTC
Height
during the descent
Aircraft
B738
Turbulence
light chop
A20N at 25,000 ft, 28 nm south, 1:19 am CDT (06:19 UTC): light chop turbulence up to 26,000 ft, remarks: during the climb ZDVWC-06. 796 nm along the route, 28 nm south of the line.
as filed, and in English
```
DEN UA /OV DEN250045/TM 0619/FL250/TP A20N/TB OCNL LGT CHOP BLO 260/RM DURC. ZDVWC-06
```
Report
a routine report filed through DEN
Where
45 nm west (250°) of DEN
Time
06:19 UTC
Height
at 25,000 ft
Aircraft
A20N
Turbulence
occasional light chop below 26,000 ft
Remarks
during the climb ZDVWC-06
E170 at 4,800 ft, 46 nm south, 1:31 am CDT (06:31 UTC): no turbulence, no icing, clear from 4,800 ft to 60,000 ft, remarks: during the descent rnav Y 11 lgjt zdvwc. 936 nm along the route, 46 nm south of the line.
as filed, and in English
```
GJT UA /OV GJT/TM 0631/FL048/TP E170/SK SKC/TB NEG/IC NEG/RM DURD RNAV Y 11 LGJT. ZDVWC
```
Report
a routine report filed through GJT
Where
over GJT
Time
06:31 UTC
Height
at 4,800 ft
Aircraft
E170
Sky
clear
Turbulence
none
Icing
none
Remarks
during the descent rnav Y 11 lgjt zdvwc

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 14 forecast points nearest it (SPI, BRL, DSM, OMA, GRI, GLD, DEN, GJT, SLC, ELY, BIH, RNO, SAC, SFO). 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	230° at 23 kt	+17 kt	21 °C	103 kt	15 h 22 min	4:31 pm PDT (23:31 UTC)
6,500 ft	240° at 21 kt	+18 kt	15 °C	102 kt	15 h 31 min	4:40 pm PDT (23:40 UTC)
8,500 ft	230° at 22 kt	+17 kt	9 °C	103 kt	15 h 22 min	4:31 pm PDT (23:31 UTC)
10,500 ft	230° at 21 kt	+18 kt	5 °C	102 kt	15 h 31 min	4:40 pm PDT (23:40 UTC)
12,500 ft	230° at 22 kt	+19 kt	1 °C	101 kt	15 h 40 min	4:49 pm PDT (23:49 UTC)
14,500 ft	230° at 25 kt	+21 kt	-3 °C	99 kt	15 h 59 min	5:08 pm PDT (00:08 UTC)
16,500 ft	230° at 27 kt	+23 kt	-7 °C	97 kt	16 h 19 min	5:28 pm PDT (00:28 UTC)
18,000 ft FL180	230° at 29 kt	+24 kt	-11 °C	96 kt	16 h 29 min	5:38 pm PDT (00:38 UTC)
24,000 ft FL240	230° at 36 kt	+30 kt	-22 °C	90 kt	17 h 35 min	6:44 pm PDT (01:44 UTC)
30,000 ft FL300	230° at 46 kt	+39 kt	-30 °C	81 kt	19 h 33 min	8:42 pm PDT (03:42 UTC)
34,000 ft FL340	240° at 51 kt	+48 kt	-36 °C	72 kt	21 h 59 min	11:08 pm PDT (06:08 UTC)
39,000 ft FL390	250° at 49 kt	+48 kt	-46 °C	72 kt	21 h 59 min	11:08 pm PDT (06:08 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
SPI	used from 0 nm out; 42 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°
BRL	used from 100 nm out; 34 nm from the line	230/24	240/29 15°	290/16 10°	280/15 4°	260/23 -7°	260/32 -19°	260/36 -33°	280/48 -41°	280/59 -52°
DSM	used from 199 nm out; 76 nm from the line	230/40	250/33 17°	250/18 12°	240/17 5°	260/28 -8°	270/34 -19°	260/41 -33°	260/55 -41°	270/62 -51°
OMA	used from 299 nm out; 61 nm from the line	220/47	240/33 19°	250/18 11°	230/17 6°	260/29 -8°	250/33 -19°	250/51 -33°	260/61 -40°	270/62 -49°
GRI	used from 398 nm out; 50 nm from the line		230/35 21°	230/23 13°	220/20 7°	240/25 -8°	240/37 -20°	250/49 -33°	260/57 -38°	260/58 -47°
GLD	used from 548 nm out; 73 nm from the line		230/49	230/42 15°	220/26 8°	240/18 -7°	230/27 -21°	240/62 -30°	240/61 -35°	250/57 -47°
DEN	used from 697 nm out; 37 nm from the line			240/21 14°	250/44 6°	220/49 -8°	220/49 -21°	230/54 -30°	240/57 -35°	240/49 -45°
GJT	used from 846 nm out; 79 nm from the line			210/43 7°	230/45 1°	220/49 -12°	220/62 -22°	220/59 -28°	230/60 -33°	220/55 -45°
SLC	used from 996 nm out; 96 nm from the line		200/5	230/8 2°	220/20 -2°	210/40 -12°	190/53 -25°	210/62 -30°	220/69 -34°	220/64 -43°
ELY	used from 1145 nm out; 55 nm from the line			200/39 3°	210/27 -2°	210/45 -15°	220/56 -24°	210/60 -28°	210/63 -34°	220/61 -43°
BIH	used from 1344 nm out; 78 nm from the line		L/V	240/7 1°	190/13 -3°	200/26 -16°	210/43 -26°	220/54 -28°	220/51 -35°	220/47 -43°
RNO	used from 1444 nm out; 77 nm from the line		010/9	320/10 -2°	210/23 -9°	210/34 -19°	220/36 -25°	230/31 -29°	230/41 -33°	230/38 -42°
SAC	used from 1493 nm out; 41 nm from the line	110/6	L/V 4°	010/11 -2°	350/11 -7°	340/24 -16°	360/44 -23°	330/24 -30°	270/21 -35°	230/23 -43°
SFO	used from 1543 nm out; 29 nm from the line	120/13	090/14 5°	040/14 -1°	350/17 -5°	360/42 -14°	360/64 -23°	350/38 -32°	300/19 -37°	250/18 -44°

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
CMI Champaign/Urbana, IL	departure	VFR	from the south (180°) at 6 knots	10+ mi	none	754 ft	2:53 am CDT (07:53 UTC)
DEC Decatur, IL	30 nm out, 15 nm south of the line, tower	VFR	from the south-southwest (210°) at 8 knots	10+ mi	none	681 ft	07:54 UTC
EVU Maryville, MO	309 nm out, 4 nm southeast of the line	VFR	from the south-southwest (200°) at 11 knots	10+ mi	none	1,145 ft	07:55 UTC
BIE Beatrice, NE	388 nm out, 6 nm south of the line	VFR	from the south (180°) at 11 knots	10+ mi	none	1,323 ft	07:55 UTC
HDE Holdrege, NE	508 nm out, 4 nm north of the line	VFR	from the south (180°) at 7 knots	10+ mi	none	2,313 ft	07:55 UTC
BJC Denver, CO	777 nm out, 15 nm south of the line, tower	VFR	from the south-southwest (200°) at 6 knots	7 mi	none	5,673 ft	07:55 UTC
EGE Eagle, CO	856 nm out, 23 nm south of the line, tower	VFR Sky: a few clouds at 6,500 feet, a broken layer at 8,000 feet, overcast at 11,000 feet	from the south-southwest (200°) at 3 knots	10+ mi	8,000 ft	6,547 ft	07:56 UTC
PUC Price, UT	1035 nm out, 3 nm southeast of the line	marginal VFR Sky: a broken layer at 1,800 feet, overcast at 3,000 feet	from the east (090°) at 6 knots	10+ mi	1,800 ft	5,957 ft	07:53 UTC
DTA Delta, UT	1115 nm out, 3 nm south of the line	VFR	from the north-northeast (030°) at 7 knots, gusting to 18	10+ mi	none	4,759 ft	17:35 UTC
HTH Hawthorne, NV	1404 nm out, 6 nm northwest of the line	marginal VFR Sky: a few clouds at 1,800 feet, a few clouds at 2,500 feet, a few clouds at 3,000 feet Weather: haze	from the west-northwest (300°) at 4 knots	4 mi	none	4,230 ft	07:55 UTC
SCK Stockton, CA	1533 nm out, 3 nm southwest of the line, tower	VFR Sky: a broken layer at 9,500 feet	from the east-southeast (110°) at 4 knots	10+ mi	9,500 ft	32 ft	07:55 UTC
OAK Oakland, CA	destination	VFR Sky: a few clouds at 1,700 feet	from the southeast (140°) at 5 knots	10+ mi	none	9 ft	12:53 am PDT (07:53 UTC)

The highest airport on this list sits at 6,547 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At OAK when you get there the forecast at the estimated arrival, 4:31 pm PDT (23:31 UTC)

Wind from the west at 8 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for OAK

From Sun 11:00 pm PDT (06:00 UTC): wind from the south at 7 knots, visibility more than 6 miles, a few clouds at 1,500 feet
From Mon 2:00 am PDT (09:00 UTC): wind from the east-southeast at 5 knots, visibility more than 6 miles, a few clouds at 1,500 feet
From Mon 11:00 am PDT (18:00 UTC): wind from the west at 8 knots, visibility more than 6 miles, clear skies

The forecast for CMI, the departure

From Mon 1:00 am CDT (06:00 UTC): wind from the south at 5 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 9:00 am CDT (14:00 UTC): wind from the south-southwest at 11 knots, visibility more than 6 miles, scattered clouds at 21,000 feet

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

6/8911 DENVER, CO, Monday, October 12, 2026 UTC 12 nm from the route, 767 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZDV

Daylight

Sunset at CMI 6:18 pm CDT (23:18 UTC), at OAK 6:34 pm PDT (01:34 UTC) (civil twilight ends 7:00 pm PDT (02:00 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

Radar now, the upper Mississippi valley · loop National Weather Service

Radar now, the northern Rockies · loop National Weather Service

Radar now, the southern Rockies · 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: University Of Illinois/Willard Airport, Oakland San Francisco Bay Airport.