Plan a flight · Sun 11:49 pm PDT (06:49 UTC)

San Diego International to Northern Colorado Regional SAN → FNL

747 nautical miles (859 statute miles) northeast on a straight line, true course 048°, about 037° magnetic at the departure end (variation 11E). At 120 knots that is 3 h 52 min at the quickest height in today's winds (34,000 ft, a 73-knot tailwind), arriving about 4:41 am MDT (10:41 UTC), after sunset at the destination. Right now SAN is marginal VFR, wind from the east-southeast (120°) at 3 knots; FNL is VFR, wind from the south-southeast (150°) at 3 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: 4 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 2W: moderate turbulence above 18,000 ft from 35,000 ft to 45,000 ft. Over the first 368 nm of the route.
AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the route from 119 to 119 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 199 to 607 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the last 518 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). Over the route from 289 to 348 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Near the route, 299 nm along the route.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the last 368 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 route from 558 to 727 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

urgent E75L at 9,000 ft, 12 nm south, 9:30 pm PDT (04:30 UTC): remarks: low-level wind shear + 20K 1000-1500 above ground on approach. 637 nm along the route, 12 nm south of the line.
as filed, and in English
```
ASE UUA /OV ASE/TM 0430/FL090/TP E75L/RM LLWS +/- 20K 1000-1500 AGL ON APCH
```
Report
an urgent report filed through ASE
Where
over ASE
Time
04:30 UTC
Height
at 9,000 ft
Aircraft
E75L
Remarks
low-level wind shear + 20K 1000-1500 above ground on approach
E75L at 700 ft, 0 nm northwest, 11:40 pm PDT (06:40 UTC): a broken layer, 18 °C, wind 170° at 6 knots, remarks: rain bases 700 ft to the east. At the departure end, 0 nm northwest of the line.
as filed, and in English
```
SAN UA /OV FINAL RWY 27/TM 0640/FL007/TP E75L/SK BKN/WX 5SM/TA 18/WV 17006/RM -RA BASES 007 TO THE EAST.
```
Report
a routine report filed through SAN
Where
final runway 27
Time
06:40 UTC
Height
at 700 ft
Aircraft
E75L
Sky
a broken layer
Weather
5SM
Temperature
18 °C
Wind
from 170° at 6 knots
Remarks
rain bases 700 ft to the east
BCS3 at 1,000 ft, 0 nm northwest, 11:20 pm PDT (06:20 UTC): 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 0620/FL010/TP BCS3/SK BASE010/RM DURD RY27
```
Report
a routine report filed through SAN
Where
over SAN
Time
06:20 UTC
Height
at 1,000 ft
Aircraft
BCS3
Sky
BASE010
Remarks
during the descent runway 27
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
E170 at 4,800 ft, 30 nm northwest, 11:31 pm PDT (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. 567 nm along the route, 30 nm northwest 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
CRJ2 at 22,000 ft, 49 nm southeast, 11:35 pm PDT (06:35 UTC): no turbulence up to 26,000 ft, no icing, clear from 22,000 ft to 60,000 ft, remarks: during the descent ZDVWC-26. 677 nm along the route, 49 nm southeast of the line.
as filed, and in English
```
DEN UA /OV DEN220060/TM 0635/FL220/TP CRJ2/SK SKC/TB NEG BLO 260/IC NEG/RM DURD/ ZDVWC-26
```
Report
a routine report filed through DEN
Where
60 nm southwest (220°) of DEN
Time
06:35 UTC
Height
at 22,000 ft
Aircraft
CRJ2
Sky
clear
Turbulence
no below 26,000 ft
Icing
none
Remarks
during the descent ZDVWC-26
B738 at 23,000 ft, 38 nm southeast, 11:23 pm PDT (06:23 UTC): no turbulence from 23,000 ft to 26,000 ft, clear from 23,000 ft to 60,000 ft, remarks: during the descent sskii star ZDVWC-06. 677 nm along the route, 38 nm southeast of the line.
as filed, and in English
```
DEN UA /OV DEN230060/TM 0623/FL230/TP B738/SK SKC/TB NEG 230-260/RM DURD SSKII STAR. ZDVWC-06
```
Report
a routine report filed through DEN
Where
60 nm southwest (230°) of DEN
Time
06:23 UTC
Height
at 23,000 ft
Aircraft
B738
Sky
clear
Turbulence
no from 23,000 ft to 26,000 ft
Remarks
during the descent sskii star ZDVWC-06
A20N at 25,000 ft, 24 nm southeast, 11:19 pm PDT (06:19 UTC): light chop turbulence up to 26,000 ft, remarks: during the climb ZDVWC-06. 697 nm along the route, 24 nm southeast 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
B38M at 21,500 ft, 23 nm northwest, 9:33 pm PDT (04:33 UTC): light turbulence up to 25,000 ft, remarks: during the descent flati star ZDVWC-13. At the destination end, 23 nm northwest of the line.
as filed, and in English
```
DEN UA /OV DEN305065/TM 0433/FL215/TP B38M/TB LGT BLO 250/RM DURD FLATI STAR. ZDVWC-13
```
Report
a routine report filed through DEN
Where
65 nm northwest (305°) of DEN
Time
04:33 UTC
Height
at 21,500 ft
Aircraft
B38M
Turbulence
light below 25,000 ft
Remarks
during the descent flati star ZDVWC-13
B738 descending, 41 nm southeast, 11:15 pm PDT (06:15 UTC): light chop turbulence. At the destination end, 41 nm southeast 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

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 7 forecast points nearest it (SAN, BLH, PRC, BCE, FMN, GJT, DEN). 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 28 kt	−26 kt	8 °C	146 kt	5 h 07 min	5:56 am MDT (11:56 UTC)
9,500 ft	210° at 29 kt	−28 kt	6 °C	148 kt	5 h 03 min	5:52 am MDT (11:52 UTC)
11,500 ft	220° at 32 kt	−32 kt	1 °C	152 kt	4 h 55 min	5:44 am MDT (11:44 UTC)
13,500 ft	220° at 37 kt	−36 kt	-2 °C	156 kt	4 h 47 min	5:36 am MDT (11:36 UTC)
15,500 ft	220° at 42 kt	−41 kt	-6 °C	161 kt	4 h 38 min	5:27 am MDT (11:27 UTC)
17,500 ft	220° at 48 kt	−46 kt	-10 °C	166 kt	4 h 30 min	5:19 am MDT (11:19 UTC)
18,000 ft FL180	220° at 49 kt	−47 kt	-11 °C	167 kt	4 h 28 min	5:17 am MDT (11:17 UTC)
24,000 ft FL240	220° at 58 kt	−57 kt	-21 °C	177 kt	4 h 13 min	5:02 am MDT (11:02 UTC)
30,000 ft FL300	220° at 68 kt	−67 kt	-29 °C	187 kt	4 h	4:49 am MDT (10:49 UTC)
34,000 ft FL340	230° at 72 kt	−73 kt	-34 °C	193 kt	3 h 52 min	4:41 am MDT (10:41 UTC)
39,000 ft FL390	220° at 62 kt	−62 kt	-45 °C	182 kt	4 h 06 min	4:55 am MDT (10:55 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; 68 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 199 nm out; 74 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°
BCE	used from 299 nm out; 89 nm from the line				220/27 -1°	210/40 -13°	220/54 -21°	220/64 -30°	220/64 -34°	220/52 -44°
FMN	used from 448 nm out; 96 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°
GJT	used from 498 nm out; 54 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°
DEN	used from 647 nm out; 77 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°

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 2,700 feet, a broken layer at 4,000 feet, overcast at 4,800 feet Weather: light rain, mist	from the east-southeast (120°) at 3 knots	5 mi	2,700 ft	16 ft	11:18 pm PDT (06:18 UTC)
RNM Ramona, CA	20 nm out, 5 nm north of the line, tower	IFR Sky: a broken layer at 600 feet, overcast at 1,400 feet Weather: rain, mist	from the west (260°) at 3 knots	2 mi	600 ft	1,394 ft	06:41 UTC
UDD Palm Springs, CA	80 nm out, 16 nm northwest of the line	no report just now				73 ft
IFP Bullhead City, AZ	199 nm out, 24 nm northwest of the line, tower	VFR	from the south-southwest (200°) at 6 knots	10+ mi	none	707 ft	06:30 UTC
GCN Grand Canyon, AZ	319 nm out, 15 nm southeast of the line, tower	VFR Sky: scattered clouds at 600 feet, a broken layer at 3,800 feet, overcast at 4,700 feet	from the south-southwest (200°) at 9 knots	10+ mi	3,800 ft	6,608 ft	06:05 UTC
PGA Page, AZ	378 nm out, 10 nm northwest of the line	VFR	from the southwest (230°) at 3 knots	10+ mi	none	4,316 ft	05:53 UTC
BDG Blanding, UT	478 nm out, 17 nm southeast of the line	VFR Sky: a broken layer at 4,100 feet, overcast at 4,900 feet Weather: light rain	from the south (170°) at 11 knots	10+ mi	4,100 ft	5,867 ft	06:15 UTC
AJZ Delta, CO	577 nm out, 4 nm southwest of the line	reported, no category	from the southwest (230°) at 5 knots		none	5,193 ft	06:35 UTC
EGE Eagle, CO	647 nm out, 11 nm northwest of the line, tower	VFR Sky: scattered clouds at 9,000 feet, overcast at 11,000 feet	from the west-northwest (290°) at 6 knots	10+ mi	11,000 ft	6,547 ft	05:56 UTC
BJC Denver, CO	727 nm out, 24 nm southeast of the line, tower	VFR	from the south-southeast (150°) at 7 knots	10+ mi	none	5,673 ft	06:35 UTC
FNL Fort Collins/Loveland, CO	destination	VFR	from the south-southeast (150°) at 3 knots	10+ mi	none	5,020 ft	11:56 pm MDT (05:56 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 FNL when you get there the forecast at the estimated arrival, 4:41 am MDT (10:41 UTC)

FNL has no terminal forecast; use the nearest airport that does.

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 25 nm from the route, 60 nm along the route · security · until 13 July · ZLA
6/8887 Indio, CA, Sunday, October 11, 2026 through Monday, October 12, 2026 Local 11 nm from the route, 70 nm along the route · security · until 12 October · ZLA
6/8891 Bullhead City, AZ, Wednesday, October 14, 2026 Local 14 nm from the route, 199 nm along the route · a VIP movement · starts Wednesday 14 October · ZLA

Daylight

Sunset at SAN 6:19 pm PDT (01:19 UTC), at FNL 6:23 pm MDT (00:23 UTC) (civil twilight ends 6:50 pm MDT (00:50 UTC)). At 120 knots the arrival at FNL is before sunrise there (7:07 am MDT (13:07 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 Diego International, Northern Colorado Regional.