Plan a flight · Sun 10:36 pm PDT (05:36 UTC)

San Diego International to St. Louis Downtown Airport SAN → CPS

1,359 nautical miles (1,564 statute miles) northeast on a straight line, true course 067°, about 056° magnetic at the departure end (variation 11E). At 120 knots that is 7 h 14 min at the quickest height in today's winds (34,000 ft, a 68-knot tailwind), arriving about 7:50 am CDT (12:50 UTC). Right now SAN is marginal VFR, wind calm; CPS is VFR, wind from the south-southeast (160°) at 4 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 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 7C: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 11:55 pm PDT (06:55 UTC). Over the route from 560 to 760 nm out.

as issued

WSUS32 KKCI 120455
MKCC WST 120455
CONVECTIVE SIGMET 7C
VALID UNTIL 0655Z
TX OK CO NM
FROM 40NNW PUB-70WSW LBL-40NE CME-40ESE RSK-30ENE HBU-40NNW PUB
AREA TS MOV FROM 22040KT. TOPS TO FL340.

AIRMET TANGO 2W: moderate turbulence above 18,000 ft from 35,000 ft to 45,000 ft. Over the first 680 nm of the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 230 to 320 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 280 to 720 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 300 to 310 nm out.
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 720 to 1229 nm out.

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 SAN.

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

B737 at 14,000 ft, 27 nm south, 10:15 pm PDT (05:15 UTC): moderate turbulence, remarks: during the descent through clouds. 270 nm along the route, 27 nm south of the line.
as filed, and in English
```
PHX UA /OV PXR339030/TM 0515/FL140/TP B737/TB OCNL MOD/RM DURD THROUGH CLOUDS
```
Report
a routine report filed through PHX
Where
30 nm north (339°) of PXR
Time
05:15 UTC
Height
at 14,000 ft
Aircraft
B737
Turbulence
occasional moderate
Remarks
during the descent through clouds
B737 at 2,500 ft, 0 nm northwest, 10:07 pm PDT (05:07 UTC): a broken layer from 3,000 ft to 5,000 ft, remarks: during the descent runway 27. At the departure end, 0 nm northwest of the line.
as filed, and in English
```
SAN UA /OV SAN/TM 0507/FL025/TP B737/SK BKN030-TOP050/RM DURD RY27
```
Report
a routine report filed through SAN
Where
over SAN
Time
05:07 UTC
Height
at 2,500 ft
Aircraft
B737
Sky
a broken layer from 3,000 ft, tops 5,000 ft
Remarks
during the descent runway 27
B38M at 3,100 ft, 0 nm northwest, 9:11 pm PDT (04:11 UTC): a broken layer above 3,100 ft, remarks: during the descent runway 27. At the departure end, 0 nm northwest of the line.
as filed, and in English
```
SAN UA /OV SAN/TM 0411/FL031/TP B38M/SK BKN031/RM DURD RY27
```
Report
a routine report filed through SAN
Where
over SAN
Time
04:11 UTC
Height
at 3,100 ft
Aircraft
B38M
Sky
a broken layer from 3,100 ft
Remarks
during the descent runway 27
B737 at 3,100 ft, 0 nm northwest, 8:05 pm PDT (03:05 UTC): remarks: during the descent bases 3,100 ft. At the departure end, 0 nm northwest of the line.
as filed, and in English
```
SAN UA /OV SAN/TM 0305/FL031/TP B737/RM DURD BASES 031
```
Report
a routine report filed through SAN
Where
over SAN
Time
03:05 UTC
Height
at 3,100 ft
Aircraft
B737
Remarks
during the descent bases 3,100 ft
C525 at 2,900 ft, 24 nm north, 7:46 pm PDT (02:46 UTC): remarks: B029. At the departure end, 24 nm north of the line.
as filed, and in English
```
CRQ UA /OV CRQ/TM 0246/FL029/TP C525/RM B029
```
Report
a routine report filed through CRQ
Where
over CRQ
Time
02:46 UTC
Height
at 2,900 ft
Aircraft
C525
Remarks
B029

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 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 14 forecast points nearest it (SAN, BLH, PRC, FMN, ABQ, ALS, TCC, GCK, GAG, ICT, MKC, SGF, COU, 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
5,500 ft	220° at 33 kt	−27 kt	20 °C	147 kt	9 h 15 min	9:51 am CDT (14:51 UTC)
7,500 ft	220° at 28 kt	−24 kt	12 °C	144 kt	9 h 26 min	10:02 am CDT (15:02 UTC)
9,500 ft	230° at 25 kt	−22 kt	9 °C	142 kt	9 h 34 min	10:10 am CDT (15:10 UTC)
11,500 ft	230° at 25 kt	−23 kt	5 °C	143 kt	9 h 30 min	10:06 am CDT (15:06 UTC)
13,500 ft	230° at 28 kt	−25 kt	1 °C	145 kt	9 h 22 min	9:58 am CDT (14:58 UTC)
15,500 ft	230° at 33 kt	−29 kt	-3 °C	149 kt	9 h 07 min	9:43 am CDT (14:43 UTC)
17,500 ft	230° at 37 kt	−33 kt	-7 °C	153 kt	8 h 53 min	9:29 am CDT (14:29 UTC)
18,000 ft FL180	230° at 38 kt	−34 kt	-8 °C	154 kt	8 h 49 min	9:25 am CDT (14:25 UTC)
24,000 ft FL240	230° at 45 kt	−43 kt	-20 °C	163 kt	8 h 20 min	8:56 am CDT (13:56 UTC)
30,000 ft FL300	240° at 64 kt	−63 kt	-29 °C	183 kt	7 h 26 min	8:02 am CDT (13:02 UTC)
34,000 ft FL340	240° at 67 kt	−68 kt	-36 °C	188 kt	7 h 14 min	7:50 am CDT (12:50 UTC)
39,000 ft FL390	250° at 57 kt	−58 kt	-47 °C	178 kt	7 h 38 min	8:14 am CDT (13:14 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
SAN	used from 0 nm out; 25 nm from the line	200/11	200/23 7°	210/27 4°	210/31 -3°	220/56 -10°	220/56 -19°	220/52 -30°	220/64 -37°	220/67 -44°
BLH	used from 50 nm out; 60 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°
PRC	used from 200 nm out; 44 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°
FMN	used from 400 nm out; 104 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°
ABQ	used from 500 nm out; 50 nm from the line			220/27 11°	210/35 5°	220/46 -9°	230/62 -20°	240/78 -25°	240/80 -35°	240/56 -47°
ALS	used from 600 nm out; 81 nm from the line				230/37 4°	220/54 -9°	230/62 -22°	240/77 -26°	240/74 -33°	230/59 -45°
TCC	used from 650 nm out; 80 nm from the line		210/42	230/33 14°	230/32 6°	220/35 -6°	230/49 -19°	240/72 -27°	250/62 -36°	250/52 -48°
GCK	used from 750 nm out; 99 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°
GAG	used from 899 nm out; 70 nm from the line		220/40 19°	230/28 14°	240/23 8°	230/21 -6°	240/31 -19°	250/66 -29°	260/58 -38°	260/47 -49°
ICT	used from 949 nm out; 37 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°
MKC	used from 1099 nm out; 71 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°
SGF	used from 1149 nm out; 63 nm from the line	230/33	230/28 15°	250/20 13°	240/18 7°	250/20 -6°	250/24 -17°	280/42 -31°	280/49 -40°	290/46 -51°
COU	used from 1199 nm out; 49 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°
STL	used from 1299 nm out; 29 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
SAN San Diego, CA	departure	marginal VFR Sky: a broken layer at 2,800 feet, overcast at 3,400 feet	calm	10+ mi	2,800 ft	16 ft	9:56 pm PDT (04:56 UTC)
RNM Ramona, CA	20 nm out, 12 nm northwest of the line, tower	IFR Sky: a few clouds at 500 feet, a broken layer at 900 feet, overcast at 2,700 feet Weather: mist	from the west-southwest (250°) at 3 knots	6 mi	900 ft	1,394 ft	05:27 UTC
PRC Prescott, AZ	260 nm out, 21 nm north of the line, tower	VFR Sky: a few clouds at 3,600 feet, a broken layer at 5,500 feet, overcast at 9,500 feet	from the south-southwest (200°) at 7 knots	10+ mi	5,500 ft	5,045 ft	04:53 UTC
INW Winslow, AZ	350 nm out, 14 nm north of the line	VFR	from the south (190°) at 9 knots	10+ mi	none	4,941 ft	04:56 UTC
GUP Gallup, NM	450 nm out, 12 nm north of the line	VFR Sky: a few clouds at 9,000 feet	from the south (180°) at 8 knots	10+ mi	none	6,472 ft	04:53 UTC
SAF Santa Fe, NM	580 nm out, 21 nm south of the line, tower	VFR Sky: a few clouds at 7,000 feet	from the south-southeast (150°) at 5 knots	10+ mi	none	6,348 ft	04:53 UTC
EHA Elkhart, KS	800 nm out, 8 nm northwest of the line	VFR	from the south (190°) at 18 knots, gusting to 24	10+ mi	none	3,621 ft	05:15 UTC
LBL Liberal, KS	840 nm out, 2 nm south of the line	VFR	from the south (180°) at 12 knots	10+ mi	none	2,885 ft	04:56 UTC
ICT Wichita, KS	1009 nm out, 2 nm southeast of the line, tower	VFR	from the south (180°) at 14 knots, gusting to 20	10+ mi	none	1,332 ft	04:53 UTC
RAW Warsaw, MO	1209 nm out, 7 nm north of the line	VFR	from the south (180°) at 4 knots	10+ mi	none	936 ft	05:15 UTC
SUS St Louis, MO	1339 nm out, 9 nm northwest of the line, tower	VFR	from the west-southwest (240°) at 3 knots	10+ mi	none	463 ft	04:54 UTC
CPS Cahokia/St Louis, IL	destination	VFR	from the south-southeast (160°) at 4 knots	10+ mi	none	412 ft	11:53 pm CDT (04:53 UTC)

The highest airport on this list sits at 6,472 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At CPS when you get there the forecast at the estimated arrival, 7:50 am CDT (12:50 UTC)

Wind from the south at 5 knots, visibility more than 6 miles, scattered clouds at 25,000 feet VFR

The whole forecast for CPS

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 11:00 am CDT (16:00 UTC): wind from the southwest at 10 knots, visibility more than 6 miles, clear skies

The forecast for SAN, the departure

From Sun 11:00 pm PDT (06:00 UTC): wind from the southwest at 6 knots, visibility more than 6 miles, showers nearby, a broken layer at 2,500 feet, a broken layer at 3,500 feet
From Mon 5:00 am PDT (12:00 UTC): wind from the west-southwest at 7 knots, visibility more than 6 miles, showers nearby, scattered clouds at 3,000 feet, a broken layer at 4,000 feet
From Mon 12:00 pm PDT (19:00 UTC): wind from the west-southwest at 10 knots, gusting to 17, visibility more than 6 miles, a few clouds at 2,500 feet, a broken layer at 5,000 feet
From Mon 5:00 pm PDT (00:00 UTC): wind from the west-southwest at 8 knots, visibility more than 6 miles, a broken layer at 5,000 feet
From Mon 8:00 pm PDT (03:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 3,000 feet, a broken layer at 5,000 feet

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

6/4812 El Centro, CA, Wednesday, July 15, 2026 through Tuesday, July 13, 2027 Local 4 nm from the route, 70 nm along the route · security · until 13 July · ZLA

Daylight

Sunset at SAN 6:19 pm PDT (01:19 UTC), at CPS 6:27 pm CDT (23:27 UTC) (civil twilight ends 6:53 pm CDT (23:53 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 Pacific Southwest · loop National Weather Service

Radar now, the southern Rockies · loop National Weather Service

Radar now, the southern Plains · 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: San Diego International, St. Louis Downtown Airport.