Plan a flight · Sun 6:02 pm PDT (01:02 UTC)

San Francisco International to Aspen-Pitkin County/Sardy Field SFO → ASE

735 nautical miles (846 statute miles) east on a straight line, true course 078°, about 064° magnetic at the departure end (variation 14E). At 120 knots that is 4 h 21 min at the quickest height in today's winds (39,000 ft, a 49-knot tailwind), arriving about 11:23 pm MDT (05:23 UTC), after sunset at the destination. Right now SFO is VFR, wind from the west-southwest (240°) at 13 knots; ASE is VFR, wind from the west-northwest (300°) at 12 knots, gusting to 15. 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: 704 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 route from 119 to 348 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 258 to 606 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the last 437 nm of the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 437 nm of the route.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the last 357 nm of the route.
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 last 238 nm of the route.
AIRMET SIERRA 2E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Near the route, 506 nm along 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 SFO.

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

E75L at 18,000 ft, 42 nm south, 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. 179 nm along the route, 42 nm south 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
E170 at 10,000 ft, 11 nm south, 4:41 pm PDT (23:41 UTC): moderate turbulence up to 10,000 ft, remarks: during the climb. 665 nm along the route, 11 nm south of the line.
as filed, and in English
```
GJT UA /OV GJT144009/TM 2341/FL100/TP E170/TB MOD SFC-100/RM DURC
```
Report
a routine report filed through GJT
Where
9 nm southeast (144°) of GJT
Time
23:41 UTC
Height
at 10,000 ft
Aircraft
E170
Turbulence
moderate from the surface to 10,000 ft
Remarks
during the climb
C680 at 18,000 ft, 10 nm south, 3:35 pm PDT (22:35 UTC): moderate turbulence, remarks: from 18,000 ft to 10,000 ft. At the destination end, 10 nm south of the line.
as filed, and in English
```
ASE UA /OV ASE230020/TM 2235/FL180/TP C680/TB MOD/RM 180-100
```
Report
a routine report filed through ASE
Where
20 nm southwest (230°) of ASE
Time
22:35 UTC
Height
at 18,000 ft
Aircraft
C680
Turbulence
moderate
Remarks
from 18,000 ft to 10,000 ft
C650 at 40,000 ft, 13 nm north, 4:48 pm PDT (23:48 UTC): moderate turbulence, remarks: ZDVWC-03. At the destination end, 13 nm north of the line.
as filed, and in English
```
ASE UA /OV DBL/TM 2348/FL400/TP C650/TB MOD /RM ZDVWC-03
```
Report
a routine report filed through ASE
Where
over DBL
Time
23:48 UTC
Height
at 40,000 ft
Aircraft
C650
Turbulence
moderate
Remarks
ZDVWC-03
C680A at 16,000 ft, 0 nm northeast, 3:59 pm PDT (22:59 UTC): moderate turbulence, scattered clouds above 16,000 ft, remarks: during the descent. At the destination end, 0 nm northeast of the line.
as filed, and in English
```
ASE UA /OV HAERI/TM 2259/FL160/TP C680A/SK SCT160/TB CONS MOD/RM DURD
```
Report
a routine report filed through ASE
Where
haeri
Time
22:59 UTC
Height
at 16,000 ft
Aircraft
C680A
Sky
scattered clouds from 16,000 ft
Turbulence
continuous moderate
Remarks
during the descent
B737 at 27,000 ft, 22 nm north, 3:14 pm PDT (22:14 UTC): remarks: mountain wave a 10-knot loss of airspeed +/-300FT entered by zoa fdcs. 159 nm along the route, 22 nm north of the line.
as filed, and in English
```
RNO UA /OV 3830N11910W/TM 2214/FL270/TP B737/RM MTN WAVE +/-10KTS +/-300FT ENTERED BY ZOA FDCS
```
Report
a routine report filed through RNO
Where
3830N11910W
Time
22:14 UTC
Height
at 27,000 ft
Aircraft
B737
Remarks
mountain wave a 10-knot loss of airspeed +/-300FT entered by zoa fdcs
C17 at 27,000 ft, 16 nm north, 3:58 pm PDT (22:58 UTC): light rime icing, -25 °C. 467 nm along the route, 16 nm north of the line.
as filed, and in English
```
DTA UA /OV DTA180010/TM 2258/FL270/TP C17/TA M25/IC LGT RIME /ZLC
```
Report
a routine report filed through DTA
Where
10 nm south (180°) of DTA
Time
22:58 UTC
Height
at 27,000 ft
Aircraft
C17
Temperature
−25 °C
Icing
light rime zlc
UAL1791 at 31,000 ft, 49 nm north, 3:40 pm PDT (22:40 UTC): light turbulence, -34 °C, wind 224° at 52 knots. 675 nm along the route, 49 nm north of the line.
as filed, and in English
```
ARP UAL1791 3959N 10807W 2240 F310 MS34 224/052KT TB LIGHT SK CLEAR IC NONE
```
Report
a routine report filed through ARP
B38M at 32,000 ft, 32 nm north, 4:32 pm PDT (23:32 UTC): light turbulence, no icing, remarks: ZDVWC-04. 695 nm along the route, 32 nm north of the line.
as filed, and in English
```
EEO UA /OV EKR146023/TM 2332/FL320/TP B38M/TB CONS LGT /IC NEG/RM ZDVWC-04
```
Report
a routine report filed through EEO
Where
23 nm southeast (146°) of EKR
Time
23:32 UTC
Height
at 32,000 ft
Aircraft
B38M
Turbulence
continuous light
Icing
none
Remarks
ZDVWC-04
LJ60 at 15,000 ft, 19 nm south, 5:28 pm PDT (00:28 UTC): light to moderate icing from 16,500 ft to 19,000 ft, -13 °C, remarks: during the descent zdvwc. 705 nm along the route, 19 nm south of the line.
as filed, and in English
```
MTJ UA /OV MTJ030030/TM 0028/FL150/TP LJ60/TA M13/IC LGT-MOD 190-165/RM DURD ZDVWC
```
Report
a routine report filed through MTJ
Where
30 nm northeast (030°) of MTJ
Time
00:28 UTC
Height
at 15,000 ft
Aircraft
LJ60
Temperature
−13 °C
Icing
light to moderate from 19,000 ft to 16,500 ft
Remarks
during the descent zdvwc
UAL2862 at 34,000 ft, 3 nm southwest, 3:39 pm PDT (22:39 UTC): no turbulence, wind 238° at 63 knots. At the destination end, 3 nm southwest of the line.
as filed, and in English
```
ARP UAL2862 3911N 10708W 2239 F340 238/063KT TB SMTH IC
```
Report
a routine report filed through ARP
B38M at 32,000 ft, 33 nm north, 4:27 pm PDT (23:27 UTC): light chop turbulence, no icing, remarks: ZDVWC-03. At the destination end, 33 nm north of the line.
as filed, and in English
```
ASE UA /OV DBL359020/TM 2327/FL320/TP B38M/TB CONS LGT CHOP OCNL MOD CHOP/IC NEG/RM ZDVWC-03
```
Report
a routine report filed through ASE
Where
20 nm north (359°) of DBL
Time
23:27 UTC
Height
at 32,000 ft
Aircraft
B38M
Turbulence
continuous light chop occasional moderate chop
Icing
none
Remarks
ZDVWC-03
C680A at 14,000 ft, 13 nm north, 4:02 pm PDT (23:02 UTC): light to moderate chop turbulence. At the destination end, 13 nm north of the line.
as filed, and in English
```
ASE UA /OV DBL/TM 2302/FL140/TP C680A/TB LGT OCNL MOD CHOP
```
Report
a routine report filed through ASE
Where
over DBL
Time
23:02 UTC
Height
at 14,000 ft
Aircraft
C680A
Turbulence
light occasional moderate chop
B738 at 38,000 ft, 47 nm northeast, 3:39 pm PDT (22:39 UTC): light chop turbulence, remarks: light mountain wave a 8-knot loss of airspeed zdvwc. At the destination end, 47 nm northeast of the line.
as filed, and in English
```
ASE UA /OV DBL047040/TM 2239/FL380/TP B738/TB LGT CHOP/RM LGT MTN WAVE +/-8KTS ZDVWC
```
Report
a routine report filed through ASE
Where
40 nm northeast (047°) of DBL
Time
22:39 UTC
Height
at 38,000 ft
Aircraft
B738
Turbulence
light chop
Remarks
light mountain wave a 8-knot loss of airspeed zdvwc

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 7 forecast points nearest it (SFO, SAC, FAT, BIH, ELY, BCE, GJT). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
7,500 ft	210° at 20 kt	−12 kt	6 °C	132 kt	5 h 34 min	12:36 am MDT (06:36 UTC)
9,500 ft	210° at 23 kt	−14 kt	5 °C	134 kt	5 h 29 min	12:31 am MDT (06:31 UTC)
11,500 ft	220° at 28 kt	−19 kt	0 °C	139 kt	5 h 17 min	12:19 am MDT (06:19 UTC)
13,500 ft	220° at 31 kt	−22 kt	-4 °C	142 kt	5 h 11 min	12:13 am MDT (06:13 UTC)
15,500 ft	220° at 35 kt	−25 kt	-8 °C	145 kt	5 h 04 min	12:06 am MDT (06:06 UTC)
17,500 ft	220° at 38 kt	−27 kt	-11 °C	147 kt	5 h	12:02 am MDT (06:02 UTC)
18,000 ft FL180	220° at 39 kt	−28 kt	-12 °C	148 kt	4 h 58 min	12:00 am MDT (06:00 UTC)
24,000 ft FL240	210° at 44 kt	−29 kt	-24 °C	149 kt	4 h 56 min	11:58 pm MDT (05:58 UTC)
30,000 ft FL300	220° at 57 kt	−44 kt	-27 °C	164 kt	4 h 29 min	11:31 pm MDT (05:31 UTC)
34,000 ft FL340	230° at 57 kt	−45 kt	-35 °C	165 kt	4 h 27 min	11:29 pm MDT (05:29 UTC)
39,000 ft FL390	230° at 57 kt	−49 kt	-44 °C	169 kt	4 h 21 min	11:23 pm MDT (05:23 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
SFO	used from 0 nm out; 25 nm from the line	220/11	L/V 5°	280/7 1°	270/15 -3°	290/23 -14°	310/29 -24°	280/26 -28°	250/30 -34°	250/36 -43°
SAC	used from 50 nm out; 49 nm from the line	270/5	L/V 5°	L/V -1°	240/11 -5°	250/22 -15°	270/25 -24°	260/31 -27°	240/39 -33°	240/39 -42°
FAT	used from 99 nm out; 75 nm from the line	180/7	170/9 7°	200/20 3°	210/27 -3°	240/27 -14°	230/38 -24°	220/57 -27°	230/42 -33°	230/41 -44°
BIH	used from 149 nm out; 52 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°
ELY	used from 248 nm out; 101 nm from the line			210/20 4°	240/21 -1°	230/37 -13°	200/58 -25°	220/73 -27°	220/73 -36°	220/69 -44°
BCE	used from 447 nm out; 73 nm from the line				210/47 0°	200/50 -12°	220/31 -23°	220/56 -26°	220/58 -35°	230/58 -45°
GJT	used from 546 nm out; 87 nm from the line			210/40 11°	210/46 3°	210/61 -10°	210/68 -22°	220/57 -29°	230/59 -36°	240/66 -46°

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
SFO San Francisco, CA	departure	VFR Sky: a few clouds at 2,000 feet, a few clouds at 5,000 feet	from the west-southwest (240°) at 13 knots	10+ mi	none	13 ft	5:56 pm PDT (00:56 UTC)
LVK Livermore, CA	30 nm out, 3 nm southwest of the line, tower	VFR Sky: scattered clouds at 7,500 feet	from the west-northwest (290°) at 11 knots	10+ mi	none	399 ft	00:53 UTC
CPU San Andreas, CA	89 nm out, 15 nm north of the line	VFR	from the west (270°) at 6 knots	10+ mi	none	1,327 ft	00:55 UTC
HTH Hawthorne, NV	189 nm out, 21 nm north of the line	VFR Sky: scattered clouds at 12,000 feet	from the north-northwest (340°) at 17 knots	10+ mi	none	4,230 ft	00:55 UTC
TPH Tonopah, NV	248 nm out, 21 nm south of the line	VFR	from the south (170°) at 21 knots, gusting to 33	10+ mi	none	5,430 ft	00:56 UTC
FOM Fillmore, UT	477 nm out, 4 nm north of the line	marginal VFR Sky: scattered clouds at 600 feet, a broken layer at 2,100 feet, overcast at 2,800 feet Weather: light rain, mist	variable at 1 knots	5 mi	2,100 ft	4,984 ft	00:35 UTC
GJT Grand Junction, CO	655 nm out, 3 nm southeast of the line, tower	VFR Sky: a few clouds at 12,000 feet	from the southeast (140°) at 13 knots, gusting to 23	10+ mi	none	4,861 ft	00:53 UTC
GWS Glenwood Springs, CO	715 nm out, 18 nm north of the line	no report just now				5,921 ft
ASE Aspen, CO	destination	VFR Sky: a broken layer at 7,500 feet, overcast at 9,000 feet Weather: light rain	from the west-northwest (300°) at 12 knots, gusting to 15	10+ mi	7,500 ft	7,837 ft	6:53 pm MDT (00:53 UTC)

The highest airport on this list sits at 7,837 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At ASE when you get there the forecast at the estimated arrival, 11:23 pm MDT (05:23 UTC)

Wind from the south-southeast at 11 knots, gusting to 26, visibility more than 6 miles, low-level wind shear, scattered clouds at 4,500 feet, a broken layer at 7,000 feet VFR

The whole forecast for ASE

From Sun 6:00 pm MDT (00:00 UTC): wind from the south at 10 knots, gusting to 24, visibility 6 miles, mist, scattered clouds at 5,000 feet, a broken layer at 9,000 feet
At times between Sun 6:00 pm MDT (00:00 UTC) and 8:00 pm MDT (02:00 UTC): wind variable at 20 knots, gusting to 35, visibility 4 miles, light rain showers, a broken layer at 5,000 feet
From Sun 8:00 pm MDT (02:00 UTC): wind from the south-southeast at 11 knots, gusting to 26, visibility more than 6 miles, low-level wind shear, scattered clouds at 4,500 feet, a broken layer at 7,000 feet
30% chance between Sun 8:00 pm MDT (02:00 UTC) and 11:00 pm MDT (05:00 UTC): visibility 4 miles, light rain showers, a broken layer at 4,500 feet
From Mon 12:00 am MDT (06:00 UTC): wind from the south-southeast at 10 knots, gusting to 21, visibility more than 6 miles, low-level wind shear, a few clouds at 5,000 feet, scattered clouds at 13,000 feet
From Mon 5:00 am MDT (11:00 UTC): wind from the south at 6 knots, visibility more than 6 miles, a few clouds at 5,000 feet, scattered clouds at 12,000 feet
From Mon 9:00 am MDT (15:00 UTC): wind from the south at 9 knots, visibility more than 6 miles, a few clouds at 4,500 feet, a few clouds at 20,000 feet

The forecast for SFO, the departure

From Sun 5:00 pm PDT (00:00 UTC): wind from the west-southwest at 16 knots, visibility more than 6 miles, a few clouds at 2,000 feet
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 2,000 feet
From Mon 1:00 am PDT (08:00 UTC): wind from the south-southeast at 4 knots, visibility more than 6 miles, clear skies
From Mon 11:00 am PDT (18:00 UTC): wind from the east-northeast at 5 knots, visibility more than 6 miles, clear skies
From Mon 3:00 pm PDT (22:00 UTC): wind from the west at 10 knots, visibility more than 6 miles, clear skies

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

6/7455 SAN FRANCISCO, CA, Thursday, October 8, 2026 through Sunday, October 11, 2026 Local 10 nm from the route, at the departure end · security · ended 11 October · ZOA
6/7231 Santa Clara, CA, Sunday, October 11, 2026 through Monday, October 12, 2026 UTC 16 nm from the route, at the departure end · drones kept away from a public gathering · until 12 October · ZOA
6/7094 45NM NE MERCED, CA, Sunday, October 4, 2026 through Tuesday, October 20, 2026 UTC 20 nm from the route, 119 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 20 October · ZOA

Daylight

Sunset at SFO 6:36 pm PDT (01:36 UTC), at ASE 6:33 pm MDT (00:33 UTC) (civil twilight ends 7:00 pm MDT (01:00 UTC)). At 120 knots the arrival at ASE is before sunrise there (7:14 am MDT (13:14 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, 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 Francisco International, Aspen-Pitkin County/Sardy Field.