Plan a flight · Sun 10:32 pm CDT (03:32 UTC)

St. Louis Lambert International to Ontario International STL → ONT

1,340 nautical miles (1,543 statute miles) west on a straight line, true course 266°, about 267° magnetic at the departure end (variation 1W). At 120 knots that is 13 h 40 min at the quickest height in today's winds (8,500 ft, a 22-knot headwind), arriving about 10:12 am PDT (17:12 UTC). Right now STL is VFR, wind from the south (170°) at 8 knots; ONT is VFR, wind from the west-southwest (240°) at 6 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

SIGMET W11W: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 11:55 pm CDT (04:55 UTC). Over the route from 695 to 844 nm out.
as issued
```
WSUS33 KKCI 120255
MKCW WST 120255
CONVECTIVE SIGMET 11W
VALID UNTIL 0455Z
CO NM
FROM 20WNW PUB-10ENE CIM-50WNW ABQ-30NNE DVC-20WNW PUB
AREA TS MOV FROM 22040KT. TOPS TO FL340.
```
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 218 to 635 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 616 to 1142 nm out.
AIRMET TANGO 2W: moderate turbulence above 18,000 ft from 35,000 ft to 45,000 ft. Over the route from 655 to 1082 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). Near the route, 745 nm along the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Near the route, 755 nm along the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 943 to 1152 nm out.
AIRMET SIERRA 2E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the route from 1033 to 1072 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 1043 to 1251 nm out.
AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the last 189 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 STL.

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

E75L climbing, 18 nm south, 10:22 pm CDT (03:22 UTC): moderate chop turbulence. 1281 nm along the route, 18 nm south of the line.
as filed, and in English
```
PSP UA /OV PSP345013/TM 0322/FLDURC/TP E75L/TB MOD CHOP/LT TURBU SFC-60
```
Report
a routine report filed through PSP
Where
13 nm north (345°) of PSP
Time
03:22 UTC
Height
during the climb
Aircraft
E75L
Turbulence
moderate chop/lt turbu SFC-60
BE20 at 20,400 ft, 40 nm north, 10:14 pm CDT (03:14 UTC): rain, heavy rain, blowing, remarks: during the climb ZDVWC-36. 804 nm along the route, 40 nm north of the line.
as filed, and in English
```
DRO UA /OV DRO050025/TM 0314/FL204/TP BE20/WX RA-+RA BLO 150/RM DURC ZDVWC-36
```
Report
a routine report filed through DRO
Where
25 nm northeast (050°) of DRO
Time
03:14 UTC
Height
at 20,400 ft
Aircraft
BE20
Weather
ra-+ra, below, at 15,000 ft
Remarks
during the climb ZDVWC-36
BE9L at 20,000 ft, 35 nm north, 7:59 pm CDT (00:59 UTC): light chop turbulence, remarks: instrument conditions ZDVWC-36. 824 nm along the route, 35 nm north of the line.
as filed, and in English
```
DRO UA /OV DRO/TM 0059/FL200/TP BE9L/TB LGT CHOP/RM IMC ZDVWC-36
```
Report
a routine report filed through DRO
Where
over DRO
Time
00:59 UTC
Height
at 20,000 ft
Aircraft
BE9L
Turbulence
light chop
Remarks
instrument conditions ZDVWC-36
PC12 at 16,400 ft, 33 nm north, 10:15 pm CDT (03:15 UTC): light chop turbulence up to 16,000 ft, clear from 16,400 ft to 60,000 ft, remarks: during the climb ZDVWC-36. 844 nm along the route, 33 nm north of the line.
as filed, and in English
```
DRO UA /OV DRO230013/TM 0315/FL164/TP PC12/SK SKC/TB CONS LGT CHOP BLO 160/RM DURC ZDVWC-36
```
Report
a routine report filed through DRO
Where
13 nm southwest (230°) of DRO
Time
03:15 UTC
Height
at 16,400 ft
Aircraft
PC12
Sky
clear
Turbulence
continuous light chop below 16,000 ft
Remarks
during the climb ZDVWC-36
E75L at 14,000 ft, 16 nm northwest, 8:28 pm CDT (01:28 UTC): light to moderate turbulence from 19,000 ft to 25,000 ft, no icing, remarks: ZDVWC-36. 844 nm along the route, 16 nm northwest of the line.
as filed, and in English
```
FMN UA /OV RSK/TM 0128/FL140/TP E75L/TB LGT-MOD 250-190/IC NEG/RM ZDVWC-36
```
Report
a routine report filed through FMN
Where
over RSK
Time
01:28 UTC
Height
at 14,000 ft
Aircraft
E75L
Turbulence
light to moderate from 25,000 ft to 19,000 ft
Icing
none
Remarks
ZDVWC-36
PC12 at 14,000 ft, 45 nm southeast, 8:03 pm CDT (01:03 UTC): light rime icing, remarks: zab/fdcs. 1072 nm along the route, 45 nm southeast of the line.
as filed, and in English
```
FLG UA /OV FLG210030/TM 0103/FL140/TP PC12/TA UNK/IC LGT RIME/RM ZAB/FDCS
```
Report
a routine report filed through FLG
Where
30 nm southwest (210°) of FLG
Time
01:03 UTC
Height
at 14,000 ft
Aircraft
PC12
Temperature
UNK
Icing
light rime
Remarks
zab/fdcs
C172 at 7,200 ft, 46 nm south, 8:06 pm CDT (01:06 UTC): overcast from 7,200 ft to 9,000 ft. 1082 nm along the route, 46 nm south of the line.
as filed, and in English
```
PRC UA /OV 6NE PRC/TM 0106/FL072/TP C172/SK OVC072-TOP090
```
Report
a routine report filed through PRC
Where
6NE prc
Time
01:06 UTC
Height
at 7,200 ft
Aircraft
C172
Sky
overcast from 7,200 ft, tops 9,000 ft
E75L climbing, 21 nm southeast, 9:36 pm CDT (02:36 UTC): light to moderate chop turbulence. At the destination end, 21 nm southeast of the line.
as filed, and in English
```
PSP UA /OV PSP347010/TM 0236/FLDURC/TP E75L/TB LT TO MOD CHOP IN CLIMB
```
Report
a routine report filed through PSP
Where
10 nm north (347°) of PSP
Time
02:36 UTC
Height
during the climb
Aircraft
E75L
Turbulence
lt to moderate chop in climb
A20N climbing, 7 nm south, 10:04 pm CDT (03:04 UTC): a routine report with nothing remarked on. At the destination end, 7 nm south of the line.
as filed, and in English
```
ONT UA /OV ONT153007/TM 0304/FLDURC/TP A20N/SK B-036 -T047
```
Report
a routine report filed through ONT
Where
7 nm southeast (153°) of ONT
Time
03:04 UTC
Height
during the climb
Aircraft
A20N
Sky
B-036 T047
A20N climbing, 3 nm southwest, 10:03 pm CDT (03:03 UTC): a routine report with nothing remarked on. At the destination end, 3 nm southwest of the line.
as filed, and in English
```
ONT UA /OV ONT204003/TM 0303/FLDURC/TP A20N/SK B-030
```
Report
a routine report filed through ONT
Where
3 nm southwest (204°) of ONT
Time
03:03 UTC
Height
during the climb
Aircraft
A20N
Sky
B-030
B737 climbing, 16 nm west, 10:01 pm CDT (03:01 UTC): a routine report with nothing remarked on. At the destination end, 16 nm west of the line.
as filed, and in English
```
ONT UA /OV ONT278016/TM 0301/FLDURC/TP B737/SK B-047 -T080
```
Report
a routine report filed through ONT
Where
16 nm west (278°) of ONT
Time
03:01 UTC
Height
during the climb
Aircraft
B737
Sky
B-047 T080
E75L climbing, 30 nm northwest, 9:15 pm CDT (02:15 UTC): a routine report with nothing remarked on. At the destination end, 30 nm northwest of the line.
as filed, and in English
```
ONT UA /OV ONT290030/TM 0215/FLDURC/TP E75L/SK T-078
```
Report
a routine report filed through ONT
Where
30 nm west (290°) of ONT
Time
02:15 UTC
Height
during the climb
Aircraft
E75L
Sky
T-078
SLG4 at 3,000 ft, 16 nm west, 8:33 pm CDT (01:33 UTC): scattered clouds above 4,000 ft. At the destination end, 16 nm west of the line.
as filed, and in English
```
EMT UA /OV EMT070006/TM 0133/FL030/TP SLG4/SK SCT040
```
Report
a routine report filed through EMT
Where
6 nm east (070°) of EMT
Time
01:33 UTC
Height
at 3,000 ft
Aircraft
SLG4
Sky
scattered clouds from 4,000 ft
B737 at 6,400 ft, 31 nm southwest, 8:30 pm CDT (01:30 UTC): a broken layer from 3,300 ft to 6,400 ft. At the destination end, 31 nm southwest of the line.
as filed, and in English
```
LGB UA /OV LGB/TM 0130/FL064/TP B737/SK BKN033-TOP064
```
Report
a routine report filed through LGB
Where
over LGB
Time
01:30 UTC
Height
at 6,400 ft
Aircraft
B737
Sky
a broken layer from 3,300 ft, tops 6,400 ft

2 more routine reports are on the map.

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 12 forecast points nearest it (STL, COU, MKC, ICT, GCK, PUB, ALS, FMN, PRC, LAS, BLH, ONT). 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 33 kt	+25 kt	19 °C	95 kt	14 h 06 min	10:38 am PDT (17:38 UTC)
6,500 ft	230° at 31 kt	+25 kt	15 °C	95 kt	14 h 06 min	10:38 am PDT (17:38 UTC)
8,500 ft	230° at 25 kt	+22 kt	11 °C	98 kt	13 h 40 min	10:12 am PDT (17:12 UTC)
10,500 ft	230° at 26 kt	+23 kt	7 °C	97 kt	13 h 49 min	10:21 am PDT (17:21 UTC)
12,500 ft	230° at 27 kt	+24 kt	3 °C	96 kt	13 h 58 min	10:30 am PDT (17:30 UTC)
14,500 ft	230° at 31 kt	+28 kt	-1 °C	92 kt	14 h 34 min	11:06 am PDT (18:06 UTC)
16,500 ft	230° at 36 kt	+31 kt	-5 °C	89 kt	15 h 03 min	11:35 am PDT (18:35 UTC)
18,000 ft FL180	230° at 39 kt	+34 kt	-8 °C	86 kt	15 h 35 min	12:07 pm PDT (19:07 UTC)
24,000 ft FL240	230° at 45 kt	+41 kt	-20 °C	79 kt	16 h 58 min	1:30 pm PDT (20:30 UTC)
30,000 ft FL300	240° at 63 kt	+60 kt	-29 °C	60 kt	22 h 20 min	6:52 pm PDT (01:52 UTC)
34,000 ft FL340	240° at 66 kt	+65 kt	-36 °C	55 kt	24 h 22 min	8:54 pm PDT (03:54 UTC)
39,000 ft FL390	250° at 57 kt	+57 kt	-47 °C	63 kt	21 h 16 min	5:48 pm PDT (00:48 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
STL	used from 0 nm out; 25 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°
COU	used from 50 nm out; 16 nm from the line	230/31	230/30 15°	260/16 11°	270/14 6°	260/24 -6°	270/27 -18°	270/37 -32°	280/49 -41°	290/56 -51°
MKC	used from 149 nm out; 45 nm from the line	220/44	250/28 18°	250/18 13°	240/12 6°	280/24 -6°	240/34 -18°	260/47 -30°	260/51 -40°	270/58 -50°
ICT	used from 248 nm out; 72 nm from the line	200/48	230/39 19°	240/24 14°	240/20 8°	240/22 -6°	250/31 -18°	250/61 -29°	260/58 -38°	270/54 -49°
GCK	used from 397 nm out; 68 nm from the line		220/48 21°	230/37 14°	250/30 8°	230/37 -6°	240/37 -20°	240/69 -28°	250/67 -37°	260/58 -48°
PUB	used from 596 nm out; 77 nm from the line			230/25 13°	230/32 6°	220/44 -8°	230/49 -21°	240/70 -28°	240/67 -34°	240/58 -46°
ALS	used from 695 nm out; 34 nm from the line				230/37 4°	220/54 -9°	230/62 -22°	240/77 -26°	240/74 -33°	230/59 -45°
FMN	used from 794 nm out; 40 nm from the line			220/28 9°	220/40 2°	220/53 -10°	220/62 -22°	230/79 -28°	240/91 -34°	230/71 -45°
PRC	used from 993 nm out; 83 nm from the line			210/25 5°	200/30 1°	220/55 -10°	220/61 -21°	220/84 -28°	230/90 -34°	230/73 -45°
LAS	used from 1142 nm out; 77 nm from the line		210/21 10°	200/18 5°	200/23 -2°	210/49 -14°	210/63 -21°	220/58 -30°	220/61 -35°	210/56 -44°
BLH	used from 1192 nm out; 72 nm from the line	210/13	200/21 11°	200/22 5°	210/25 -1°	210/51 -10°	220/61 -20°	220/81 -29°	220/92 -34°	220/79 -45°
ONT	used from 1241 nm out; 74 nm from the line	190/8	190/19 6°	210/23 4°	210/29 -3°	210/47 -13°	210/49 -19°	220/47 -30°	220/50 -36°	220/55 -43°

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
STL St Louis, MO	departure	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)
JEF Jefferson City, MO	79 nm out, 6 nm southwest of the line, tower	VFR	calm	10+ mi	none	549 ft	02:53 UTC
IXD Olathe, KS	209 nm out, 24 nm north of the line, tower	VFR	from the south (170°) at 10 knots	10+ mi	none	1,087 ft	02:53 UTC
HUT Hutchinson, KS	357 nm out, 5 nm southeast of the line, tower	VFR	from the south (170°) at 13 knots, gusting to 21	10+ mi	none	1,542 ft	02:52 UTC
GCK Garden City, KS	487 nm out, 10 nm northwest of the line, tower	VFR	from the south (190°) at 16 knots, gusting to 25	10+ mi	none	2,890 ft	02:54 UTC
TAD Trinidad, CO	665 nm out, 4 nm northwest of the line	VFR	from the southwest (230°) at 17 knots, gusting to 24	10+ mi	none	5,761 ft	02:54 UTC
FMN Farmington, NM	854 nm out, 17 nm north of the line, tower	VFR	from the south-southwest (200°) at 15 knots	10+ mi	none	5,506 ft	02:53 UTC
GCN Grand Canyon, AZ	1053 nm out, 23 nm north of the line, tower	low IFR Sky: overcast at 400 feet	from the south-southwest (210°) at 10 knots	9 mi	400 ft	6,608 ft	03:22 UTC
IFP Bullhead City, AZ	1182 nm out, 14 nm north of the line, tower	VFR Sky: scattered clouds at 4,900 feet, scattered clouds at 7,000 feet	from the south-southeast (160°) at 15 knots	10+ mi	none	707 ft	03:10 UTC
SBD San Bernardino, CA	1321 nm out, 4 nm south of the line, tower	VFR Sky: scattered clouds at 1,800 feet, a broken layer at 3,100 feet, overcast at 3,800 feet	calm	10+ mi	3,100 ft	1,159 ft	02:55 UTC
ONT Ontario, CA	destination	VFR Sky: scattered clouds at 3,200 feet, a broken layer at 4,500 feet, a broken layer at 5,500 feet	from the west-southwest (240°) at 6 knots	10+ mi	4,500 ft	944 ft	7:53 pm PDT (02:53 UTC)

The highest airport on this list sits at 6,608 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At ONT when you get there the forecast at the estimated arrival, 10:12 am PDT (17:12 UTC)

Wind from the west-southwest at 4 knots, visibility more than 6 miles, showers nearby, a few clouds at 2,500 feet, a broken layer at 5,000 feet VFR

The whole forecast for ONT

From Sun 7:00 pm PDT (02:00 UTC): wind from the west-southwest at 8 knots, visibility more than 6 miles, a few clouds at 3,000 feet, a broken layer at 5,000 feet
From Sun 11:00 pm PDT (06:00 UTC): wind from the west-southwest at 6 knots, visibility more than 6 miles, showers nearby, overcast at 2,500 feet
From Mon 3:00 am PDT (10:00 UTC): wind from the west-southwest at 4 knots, visibility more than 6 miles, showers nearby, a few clouds at 2,500 feet, a broken layer at 5,000 feet
From Mon 11:00 am PDT (18:00 UTC): wind from the west-southwest at 5 knots, visibility more than 6 miles, a broken layer at 5,000 feet
From Mon 2:00 pm PDT (21:00 UTC): wind from the west-southwest at 11 knots, gusting to 18, visibility more than 6 miles, a broken layer at 5,000 feet
From Mon 8:00 pm PDT (03:00 UTC): wind from the west-southwest at 9 knots, visibility more than 6 miles, a broken layer at 6,000 feet

The forecast for STL, the departure

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

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

6/8891 Bullhead City, AZ, Wednesday, October 14, 2026 Local 4 nm from the route, 1182 nm along the route · a VIP movement · starts Wednesday 14 October · ZLA
4/3635 DISNEYLAND THEME PARK, ANAHEIM,, CA 19 nm from the route, at the destination end · security · ZLA

Daylight

Sunset at STL 6:27 pm CDT (23:27 UTC), at ONT 6:20 pm PDT (01:20 UTC) (civil twilight ends 6:45 pm PDT (01:45 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 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: St. Louis Lambert International, Ontario International.