Plan a flight · Sun 4:30 pm PDT (23:30 UTC)

Mammoth Yosemite Airport to John Wayne/Orange County MMH → SNA

242 nautical miles (278 statute miles) south on a straight line, true course 168°, about 153° magnetic at the departure end (variation 15E). At 120 knots that is 2 h 12 min at the quickest height in today's winds (5,500 ft, a 10-knot headwind), arriving about 6:42 pm PDT (01:42 UTC), after sunset at the destination. Right now MMH is VFR, wind variable at 5 knots, gusting to 24; SNA is VFR, wind from the south-southwest (210°) at 9 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: 2 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: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the first 87 nm of the route.
AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the route from 126 to 222 nm out.
AIRMET SIERRA 6E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 58 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 MMH.

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

E75L at 18,000 ft, 13 nm east, 4:24 pm PDT (23:24 UTC): moderate turbulence from 18,000 ft to 22,000 ft, remarks: mountain wave a 10-knot loss of airspeed entered by zoa fdcs. At the departure end, 13 nm east of the line.
as filed, and in English
```
LOL UA /OV BIH300011/TM 2324/FL 180/TP E75L/TB MOD 180-220/RM MTN WAVE /-10 ENTERED BY ZOA FDCS AWC-WEB
```
Report
a routine report filed through LOL
Where
11 nm northwest (300°) of BIH
Time
23:24 UTC
Height
at 18,000 ft
Aircraft
E75L
Turbulence
moderate from 18,000 ft to 22,000 ft
Remarks
mountain wave a 10-knot loss of airspeed entered by zoa fdcs
B737 at 14,000 ft, 25 nm east, 2:54 pm PDT (21:54 UTC): moderate turbulence. 203 nm along the route, 25 nm east of the line.
as filed, and in English
```
ONT UA /OV 20N ONT/TM 2154/FL140/TP B737/TB MOD
```
Report
a routine report filed through ONT
Where
20N ont
Time
21:54 UTC
Height
at 14,000 ft
Aircraft
B737
Turbulence
moderate
B738 descending, 25 nm east, 2:37 pm PDT (21:37 UTC): moderate chop turbulence. 203 nm along the route, 25 nm east of the line.
as filed, and in English
```
ONT UA /OV ONT358021/TM 2137/FLDURD/TP B738/TB MODERATE CHOP STARTING AT 130
```
Report
a routine report filed through ONT
Where
21 nm north (358°) of ONT
Time
21:37 UTC
Height
during the descent
Aircraft
B738
Turbulence
moderate chop starting at at 13,000 ft
EPIC at 16,000 ft, 37 nm east, 1:48 pm PDT (20:48 UTC): light rime icing, -10 °C, remarks: zlawc. 155 nm along the route, 37 nm east of the line.
as filed, and in English
```
LAX UA /OV LAX016092/TM 2048/FL160/TP EPIC/TA M10/IC LGT RIME/RM ZLAWC AWC-WEB
```
Report
a routine report filed through LAX
Where
92 nm north (016°) of LAX
Time
20:48 UTC
Height
at 16,000 ft
Aircraft
EPIC
Temperature
−10 °C
Icing
light rime
Remarks
zlawc
B38M at 36,000 ft, 22 nm east, 2:43 pm PDT (21:43 UTC): clear from 36,000 ft to 60,000 ft, -40 °C, wind 205° at 55 knots, remarks: produced by skypath. 174 nm along the route, 22 nm east of the line.
as filed, and in English
```
EDW UA /OV EDW154007 /TM 2143 /FL360 /TP B38M /SK SKC /WX FV99SM /TA M40 /WV 20555KT /RM PRODUCED BY SKYPATH
```
Report
a routine report filed through EDW
Where
7 nm southeast (154°) of EDW
Time
21:43 UTC
Height
at 36,000 ft
Aircraft
B38M
Sky
clear
Weather
flight visibility 99 miles
Temperature
−40 °C
Wind
from 205° at 55 knots
Remarks
produced by skypath
B739 at 33,000 ft, 1 nm east, 4:01 pm PDT (23:01 UTC): remarks: mountain wave 10 knots zlawc. 184 nm along the route, 1 nm east of the line.
as filed, and in English
```
SDB UA /OV PMD/TM 2301/FL330/TP B739/RM MTN WAVE /- 10 KT /ZLAWC AWC-WEB
```
Report
a routine report filed through SDB
Where
over PMD
Time
23:01 UTC
Height
at 33,000 ft
Aircraft
B739
Remarks
mountain wave 10 knots zlawc
B739 at 33,000 ft, 19 nm east, 4:02 pm PDT (23:02 UTC): remarks: mountain wave 10 knots zlawc. 193 nm along the route, 19 nm east of the line.
as filed, and in English
```
DRA UA /OV VCV242015/TM 2302/FL330/TP B739/RM MTN WAVE /- 10 KT /ZLAWC AWC-WEB
```
Report
a routine report filed through DRA
Where
15 nm southwest (242°) of VCV
Time
23:02 UTC
Height
at 33,000 ft
Aircraft
B739
Remarks
mountain wave 10 knots zlawc
GLF4 at 3,500 ft, 24 nm west, 1:52 pm PDT (20:52 UTC): remarks: reported by A GLF4 on 6 mile final on ils to 16R. 203 nm along the route, 24 nm west of the line.
as filed, and in English
```
VNY UA /OV VNY/TM 2052/FL035/TP GLF4/RM REPORTED BY A GLF4 ON 6 MILE FINAL ON ILS TO 16R
```
Report
a routine report filed through VNY
Where
over VNY
Time
20:52 UTC
Height
at 3,500 ft
Aircraft
GLF4
Remarks
reported by A GLF4 on 6 mile final on ils to 16R
E55P at 3,000 ft, 18 nm west, 3:00 pm PDT (22:00 UTC): a broken layer from 3,000 ft to 5,000 ft, remarks: during the descent RY21. 213 nm along the route, 18 nm west of the line.
as filed, and in English
```
SMO UA /OV SMO030008/TM 2200/FL030/TP E55P/SK BKN030-TOP050/RM DURD RY21
```
Report
a routine report filed through SMO
Where
8 nm northeast (030°) of SMO
Time
22:00 UTC
Height
at 3,000 ft
Aircraft
E55P
Sky
a broken layer from 3,000 ft, tops 5,000 ft
Remarks
during the descent RY21
C25M at 3,000 ft, 18 nm west, 1:50 pm PDT (20:50 UTC): a broken layer above 3,000 ft, remarks: during the descent RY21. 213 nm along the route, 18 nm west of the line.
as filed, and in English
```
SMO UA /OV SMO030008/TM 2050/FL030/TP C25M/SK BKN030-TOPUNKN/RM DURD RY21
```
Report
a routine report filed through SMO
Where
8 nm northeast (030°) of SMO
Time
20:50 UTC
Height
at 3,000 ft
Aircraft
C25M
Sky
a broken layer from 3,000 ft, tops unknown
Remarks
during the descent RY21
B757 at 4,000 ft, 15 nm west, 3:38 pm PDT (22:38 UTC): remarks: reduced visibility below the ceiling ILS25L. 222 nm along the route, 15 nm west of the line.
as filed, and in English
```
LAX UA /OV LAX070010/TM 2238/FL040/TP B757/SK TOPS050 BASES040/RM REDUCED VISIBILITY BELOW THE CEILING. ILS25L
```
Report
a routine report filed through LAX
Where
10 nm east (070°) of LAX
Time
22:38 UTC
Height
at 4,000 ft
Aircraft
B757
Sky
TOPS050 BASES040
Remarks
reduced visibility below the ceiling ILS25L
B737 at 4,000 ft, 23 nm west, 3:37 pm PDT (22:37 UTC): a broken layer from 4,000 ft to 5,000 ft. 222 nm along the route, 23 nm west of the line.
as filed, and in English
```
KLAX UA /OV KLAX/TM 2237/FL040/TP B737/SK BKN040-TOP050
```
Report
a routine report filed through KLAX
Where
over KLAX
Time
22:37 UTC
Height
at 4,000 ft
Aircraft
B737
Sky
a broken layer from 4,000 ft, tops 5,000 ft
A320 at 3,500 ft, 25 nm west, 3:13 pm PDT (22:13 UTC): a broken layer above 3,500 ft, remarks: during the descent RY25L. 222 nm along the route, 25 nm west of the line.
as filed, and in English
```
LAX UA /OV LAX/TM 2213/FL035/TP A320/SK BKN-BASE035/RM DURD RY25L
```
Report
a routine report filed through LAX
Where
over LAX
Time
22:13 UTC
Height
at 3,500 ft
Aircraft
A320
Sky
BKN-BASE035
Remarks
during the descent RY25L
E75L , 23 nm west, 2:20 pm PDT (21:20 UTC): a broken layer from 3,700 ft to 4,700 ft. 222 nm along the route, 23 nm west of the line.
as filed, and in English
```
KLAX UA /OV KLAX/TM 2120/FL2125/TP E75L/SK BKN037-TOP047
```
Report
a routine report filed through KLAX
Where
over KLAX
Time
21:20 UTC
Height
at 212,500 ft
Aircraft
E75L
Sky
a broken layer from 3,700 ft, tops 4,700 ft

7 more routine reports are on the map.

Winds aloft along the route, and the time en route the forecast for use 20:00–03:00 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 3 forecast points nearest it (BIH, WJF, 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
5,500 ft	220° at 15 kt	+10 kt	8 °C	110 kt	2 h 12 min	6:42 pm PDT (01:42 UTC)
7,500 ft	220° at 18 kt	+10 kt	6 °C	110 kt	2 h 12 min	6:42 pm PDT (01:42 UTC)
9,500 ft	230° at 23 kt	+11 kt	4 °C	109 kt	2 h 13 min	6:43 pm PDT (01:43 UTC)
11,500 ft	230° at 27 kt	+15 kt	-1 °C	105 kt	2 h 18 min	6:48 pm PDT (01:48 UTC)
13,500 ft	220° at 29 kt	+17 kt	-5 °C	103 kt	2 h 21 min	6:51 pm PDT (01:51 UTC)
15,500 ft	220° at 30 kt	+18 kt	-8 °C	102 kt	2 h 22 min	6:52 pm PDT (01:52 UTC)
17,500 ft	220° at 31 kt	+19 kt	-12 °C	101 kt	2 h 24 min	6:54 pm PDT (01:54 UTC)
18,000 ft FL180	220° at 32 kt	+19 kt	-13 °C	101 kt	2 h 24 min	6:54 pm PDT (01:54 UTC)
24,000 ft FL240	220° at 42 kt	+26 kt	-22 °C	94 kt	2 h 34 min	7:04 pm PDT (02:04 UTC)
30,000 ft FL300	220° at 54 kt	+33 kt	-28 °C	87 kt	2 h 47 min	7:17 pm PDT (02:17 UTC)
34,000 ft FL340	210° at 52 kt	+36 kt	-34 °C	84 kt	2 h 53 min	7:23 pm PDT (02:23 UTC)
39,000 ft FL390	220° at 51 kt	+30 kt	-44 °C	90 kt	2 h 41 min	7:11 pm PDT (02:11 UTC)

Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 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
BIH	used from 0 nm out; 20 nm from the line		L/V	210/14 6°	210/20 -2°	230/26 -14°	220/32 -24°	220/63 -27°	220/56 -35°	230/50 -44°
WJF	used from 97 nm out; 55 nm from the line		220/30 8°	240/28 5°	230/34 -2°	220/34 -13°	220/48 -20°	220/47 -29°	210/48 -34°	220/52 -44°
ONT	used from 193 nm out; 18 nm from the line	230/11	200/17 6°	230/27 4°	230/32 -2°	210/39 -12°	220/51 -20°	220/48 -29°	210/51 -34°	210/52 -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
MMH Mammoth Lakes, CA	departure	VFR Sky: scattered clouds at 8,500 feet	variable at 5 knots, gusting to 24	10+ mi	none	7,134 ft	4:15 pm PDT (23:15 UTC)
BIH Bishop, CA	19 nm out, 19 nm east of the line	VFR	from the southeast (140°) at 9 knots, gusting to 16	10+ mi	none	4,124 ft	22:56 UTC
MHV Mojave, CA	155 nm out, 4 nm southeast of the line, tower	VFR Sky: overcast at 14,000 feet	from the southwest (220°) at 21 knots, gusting to 32	10+ mi	14,000 ft	2,801 ft	22:15 UTC
PMD Palmdale, CA	184 nm out, 1 nm northeast of the line, tower	VFR	from the south-southwest (210°) at 20 knots, gusting to 32	10+ mi	none	2,542 ft	22:53 UTC
EMT El Monte, CA	213 nm out, 5 nm southwest of the line, tower	VFR Sky: scattered clouds at 4,000 feet, a broken layer at 5,000 feet	from the south-southeast (150°) at 10 knots	10+ mi	5,000 ft	295 ft	22:45 UTC
SNA Santa Ana, CA	destination	VFR Sky: a few clouds at 3,200 feet, a broken layer at 3,900 feet, a broken layer at 4,800 feet	from the south-southwest (210°) at 9 knots	10+ mi	3,900 ft	55 ft	3:53 pm PDT (22:53 UTC)

The highest airport on this list sits at 7,134 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At SNA when you get there the forecast at the estimated arrival, 6:42 pm PDT (01:42 UTC)

Wind from the south-southwest at 9 knots, visibility more than 6 miles, a few clouds at 3,000 feet, a broken layer at 5,000 feet VFR

The whole forecast for SNA

From Sun 5:00 pm PDT (00:00 UTC): wind from the south-southwest at 9 knots, visibility more than 6 miles, a few clouds at 3,000 feet, a broken layer at 5,000 feet
From Sun 10:00 pm PDT (05:00 UTC): wind from the south at 5 knots, visibility more than 6 miles, showers nearby, scattered clouds at 2,500 feet, a broken layer at 5,000 feet
From Mon 12:00 pm PDT (19:00 UTC): wind from the southwest at 9 knots, visibility more than 6 miles, a broken layer at 5,000 feet

The forecast for MMH, the departure

From Sun 5:00 pm PDT (00:00 UTC): wind from the west-northwest at 14 knots, gusting to 24, visibility more than 6 miles, scattered clouds at 6,000 feet
From Sun 8:00 pm PDT (03:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 6,000 feet
From Mon 3:00 am PDT (10:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 3,000 feet
From Mon 1:00 pm PDT (20:00 UTC): wind from the east-southeast at 7 knots, visibility 6 miles, light rain showers, a broken layer at 4,000 feet

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

6/8783 38NM NE BAKERSFIELD, CA, Saturday, October 10, 2026 through Friday, October 23, 2026 UTC 3 nm from the route, 116 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 23 October · ZLA
4/3635 DISNEYLAND THEME PARK, ANAHEIM,, CA on the route, at the destination end · security · ZLA

Daylight

Sunset at MMH 6:22 pm PDT (01:22 UTC), at SNA 6:21 pm PDT (01:21 UTC) (civil twilight ends 6:46 pm PDT (01:46 UTC)). At 120 knots the arrival at SNA is after sunset there (6:22 pm PDT (01:22 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, 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: Mammoth Yosemite Airport, John Wayne/Orange County.