Plan a flight · Mon 4:09 am EDT (08:09 UTC)

Groton-New London Airport to Oakland San Francisco Bay Airport GON → OAK

2,301 nautical miles (2,648 statute miles) west on a straight line, true course 282°, about 296° magnetic at the departure end (variation 14W). At 120 knots that is 20 h 55 min at the quickest height in today's winds (4,500 ft, a 10-knot headwind), arriving about 10:04 pm PDT (05:04 UTC), after sunset at the destination. Right now GON is marginal VFR, wind from the north-northeast (020°) at 14 knots; OAK is VFR, wind from the southeast (140°) at 5 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

AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist, fog). Over the first 578 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the first 159 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 110 to 309 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 767 to 1295 nm out.
AIRMET SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the route from 1215 to 1345 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 42,000 ft. Over the route from 1415 to 1773 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 1425 to 1933 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). Over the route from 1435 to 1624 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1534 to 2062 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 1554 to 2082 nm out.
AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 1564 to 1574 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 149 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 GON.

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

A333 descending, 17 nm south, 1:44 am EDT (05:44 UTC): a routine report with nothing remarked on. 508 nm along the route, 17 nm south of the line.
as filed, and in English
```
DTW UA /OV DTW/TM 0544/FLDURD/TP A333/SK TOPS 025
```
Report
a routine report filed through DTW
Where
over DTW
Time
05:44 UTC
Height
during the descent
Aircraft
A333
Sky
tops 2,500 ft

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 18 forecast points nearest it (BDL, AVP, BUF, CLE, MKG, JOT, DBQ, MCW, OMA, ONL, BFF, RKS, SLC, ELY, BAM, RNO, SAC, SFO). 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	230° at 12 kt	+10 kt	20 °C	110 kt	20 h 55 min	10:04 pm PDT (05:04 UTC)
6,500 ft	250° at 11 kt	+11 kt	13 °C	109 kt	21 h 07 min	10:16 pm PDT (05:16 UTC)
8,500 ft	240° at 14 kt	+14 kt	8 °C	106 kt	21 h 42 min	10:51 pm PDT (05:51 UTC)
10,500 ft	240° at 15 kt	+15 kt	5 °C	105 kt	21 h 55 min	11:04 pm PDT (06:04 UTC)
12,500 ft	240° at 17 kt	+16 kt	1 °C	104 kt	22 h 08 min	11:17 pm PDT (06:17 UTC)
14,500 ft	240° at 19 kt	+18 kt	-3 °C	102 kt	22 h 34 min	11:43 pm PDT (06:43 UTC)
16,500 ft	240° at 20 kt	+20 kt	-8 °C	100 kt	23 h 01 min	12:10 am PDT (07:10 UTC)
18,000 ft FL180	240° at 22 kt	+22 kt	-11 °C	98 kt	23 h 29 min	12:38 am PDT (07:38 UTC)
24,000 ft FL240	240° at 27 kt	+26 kt	-22 °C	94 kt	24 h 29 min	1:38 am PDT (08:38 UTC)
30,000 ft FL300	240° at 35 kt	+35 kt	-33 °C	85 kt	27 h 04 min	4:13 am PDT (11:13 UTC)
34,000 ft FL340	250° at 43 kt	+44 kt	-39 °C	76 kt	30 h 17 min	7:26 am PDT (14:26 UTC)
39,000 ft FL390	260° at 47 kt	+49 kt	-47 °C	71 kt	32 h 25 min	9:34 am PDT (16:34 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
BDL	used from 0 nm out; 32 nm from the line	120/24	290/23 12°	280/21 8°	250/36 3°	250/41 -11°	230/48 -21°	230/78 -32°	230/96 -41°	230/86 -52°
AVP	used from 100 nm out; 49 nm from the line	150/5	350/13 12°	270/20 8°	260/17 4°	260/25 -11°	240/31 -22°	240/54 -35°	230/61 -41°	240/55 -49°
BUF	used from 249 nm out; 59 nm from the line	320/10	010/16 10°	360/10 6°	340/13 2°	330/22 -11°	300/25 -23°	320/31 -38°	300/29 -44°	280/36 -50°
CLE	used from 399 nm out; 61 nm from the line	340/7	010/16 13°	350/18 8°	350/20 3°	340/31 -10°	340/46 -21°	340/54 -37°	330/62 -44°	340/65 -49°
MKG	used from 548 nm out; 74 nm from the line	260/22	290/16 15°	300/11 10°	290/5 3°	300/26 -9°	300/32 -20°	320/48 -36°	320/61 -45°	310/74 -53°
JOT	used from 697 nm out; 67 nm from the line	250/23	270/22 15°	250/16 10°	240/9 4°	280/22 -7°	280/29 -19°	300/29 -34°	290/50 -43°	300/64 -52°
DBQ	used from 747 nm out; 65 nm from the line	230/33	250/30 16°	280/15 9°	260/15 5°	260/21 -7°	260/24 -20°	250/37 -33°	270/42 -43°	280/63 -52°
MCW	used from 897 nm out; 45 nm from the line	220/44	250/30 17°	230/14 12°	240/17 6°	250/22 -8°	270/29 -20°	250/34 -34°	260/52 -43°	260/59 -51°
OMA	used from 1046 nm out; 69 nm from the line	220/47	240/33 19°	250/18 11°	230/17 6°	260/29 -8°	250/33 -19°	250/51 -33°	260/61 -40°	270/62 -49°
ONL	used from 1096 nm out; 68 nm from the line		210/31 20°	230/27 13°	230/18 7°	220/19 -8°	240/26 -20°	250/44 -35°	270/52 -39°	260/57 -47°
BFF	used from 1295 nm out; 89 nm from the line		180/28	220/33 15°	210/31 7°	230/32 -9°	220/41 -21°	220/40 -33°	240/47 -36°	250/54 -46°
RKS	used from 1544 nm out; 92 nm from the line			200/41	220/44 1°	220/35 -11°	220/46 -24°	210/53 -27°	220/62 -35°	230/61 -44°
SLC	used from 1743 nm out; 34 nm from the line		200/5	230/8 2°	220/20 -2°	210/40 -12°	190/53 -25°	210/62 -30°	220/69 -34°	220/64 -43°
ELY	used from 1843 nm out; 79 nm from the line			200/39 3°	210/27 -2°	210/45 -15°	220/56 -24°	210/60 -28°	210/63 -34°	220/61 -43°
BAM	used from 1993 nm out; 78 nm from the line			310/7 0°	270/19 -7°	200/38 -17°	190/49 -28°	220/69 -29°	220/63 -33°	230/48 -41°
RNO	used from 2092 nm out; 71 nm from the line		010/9	320/10 -2°	210/23 -9°	210/34 -19°	220/36 -25°	230/31 -29°	230/41 -33°	230/38 -42°
SAC	used from 2192 nm out; 48 nm from the line	110/6	L/V 4°	010/11 -2°	350/11 -7°	340/24 -16°	360/44 -23°	330/24 -30°	270/21 -35°	230/23 -43°
SFO	used from 2291 nm out; 14 nm from the line	120/13	090/14 5°	040/14 -1°	350/17 -5°	360/42 -14°	360/64 -23°	350/38 -32°	300/19 -37°	250/18 -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
GON Groton (New London), CT	departure	marginal VFR Sky: overcast at 2,400 feet	from the north-northeast (020°) at 14 knots	10+ mi	2,400 ft	9 ft	3:56 am EDT (07:56 UTC)
OXC Oxford, CT	50 nm out, 1 nm south of the line, tower	IFR Sky: overcast at 600 feet	from the northeast (040°) at 11 knots	10+ mi	600 ft	730 ft	07:56 UTC
ERI Erie, PA	369 nm out, 12 nm south of the line, tower	marginal VFR Sky: overcast at 3,000 feet	variable at 4 knots	10+ mi	3,000 ft	732 ft	00:51 UTC
DET Detroit, MI	498 nm out, 5 nm southeast of the line, tower	IFR Sky: overcast at 900 feet	from the west (260°) at 4 knots	10+ mi	900 ft	624 ft	08:03 UTC
ALO Waterloo, IA	907 nm out, 4 nm southwest of the line, tower	VFR	from the south (170°) at 7 knots	10+ mi	none	873 ft	07:54 UTC
SUX Sioux City, IA	1086 nm out, 2 nm south of the line, tower	VFR	from the west-southwest (250°) at 3 knots	10+ mi	none	1,098 ft	07:52 UTC
TIF Thedford, NE	1275 nm out, 8 nm south of the line	low IFR Sky: overcast at 300 feet	from the east (100°) at 7 knots	10+ mi	300 ft	2,925 ft	07:55 UTC
BFF Scottsbluff, NE	1405 nm out, 8 nm northwest of the line	VFR	from the north (010°) at 12 knots	10+ mi	none	3,967 ft	07:53 UTC
PVU Provo, UT	1793 nm out, 12 nm southeast of the line, tower	VFR Sky: scattered clouds at 5,500 feet, a broken layer at 7,500 feet, overcast at 12,000 feet	from the east (090°) at 7 knots	10+ mi	7,500 ft	4,496 ft	07:56 UTC
TMT Austin, NV	2042 nm out, 18 nm northwest of the line	VFR Sky: scattered clouds at 4,300 feet, a broken layer at 6,500 feet, overcast at 9,000 feet	from the east-northeast (070°) at 3 knots	10+ mi	6,500 ft	5,735 ft	07:55 UTC
SCK Stockton, CA	2252 nm out, 8 nm south of the line, tower	VFR Sky: a broken layer at 9,500 feet	from the east-southeast (110°) at 4 knots	10+ mi	9,500 ft	32 ft	07:55 UTC
OAK Oakland, CA	destination	VFR Sky: a few clouds at 1,700 feet	from the southeast (140°) at 5 knots	10+ mi	none	9 ft	12:53 am PDT (07:53 UTC)

The highest airport on this list sits at 5,735 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At OAK when you get there the forecast at the estimated arrival, 10:04 pm PDT (05:04 UTC)

Wind from the west at 8 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for OAK

From Sun 11:00 pm PDT (06:00 UTC): wind from the south at 7 knots, visibility more than 6 miles, a few clouds at 1,500 feet
From Mon 2:00 am PDT (09:00 UTC): wind from the east-southeast at 5 knots, visibility more than 6 miles, a few clouds at 1,500 feet
From Mon 11:00 am PDT (18:00 UTC): wind from the west at 8 knots, visibility more than 6 miles, clear skies

The forecast for GON, the departure

From Mon 2:00 am EDT (06:00 UTC): wind from the north-northeast at 13 knots, visibility 6 miles, light rain showers, scattered clouds at 400 feet, overcast at 800 feet
At times between Mon 2:00 am EDT (06:00 UTC) and 4:00 am EDT (08:00 UTC): a broken layer at 600 feet
From Mon 4:00 am EDT (08:00 UTC): wind from the north-northeast at 12 knots, visibility 6 miles, mist, showers nearby, scattered clouds at 400 feet, overcast at 800 feet
From Mon 9:00 am EDT (13:00 UTC): wind from the north at 11 knots, visibility more than 6 miles, a broken layer at 700 feet, overcast at 1,200 feet
From Mon 11:00 am EDT (15:00 UTC): wind from the north at 8 knots, visibility more than 6 miles, a broken layer at 2,000 feet
From Mon 3:00 pm EDT (19:00 UTC): wind from the northwest at 7 knots, visibility more than 6 miles, scattered clouds at 2,000 feet, a broken layer at 5,000 feet
From Mon 10:00 pm EDT (02:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 5,000 feet, a few clouds at 15,000 feet

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

No temporary flight restriction on or near this route right now.

Daylight

Sunset at GON 6:12 pm EDT (22:12 UTC), at OAK 6:34 pm PDT (01:34 UTC) (civil twilight ends 7:00 pm PDT (02:00 UTC)). At 120 knots the arrival at OAK is after sunset there (6:35 pm PDT (01:35 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 Northeast · loop National Weather Service

Radar now, the central Great Lakes · loop National Weather Service

Radar now, the upper Mississippi valley · 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: Groton-New London Airport, Oakland San Francisco Bay Airport.