Plan a flight · Mon 2:34 am EDT (06:34 UTC)

Manchester Boston Regional to San Francisco International MHT → SFO

2,319 nautical miles (2,669 statute miles) west on a straight line, true course 280°, about 295° magnetic at the departure end (variation 15W). At 120 knots that is 21 h 17 min at the quickest height in today's winds (4,500 ft, a 11-knot headwind), arriving about 8:51 pm PDT (03:51 UTC), after sunset at the destination. Right now MHT is marginal VFR, wind from the north (360°) at 4 knots; SFO is VFR, wind from the south (180°) at 8 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

SIGMET W15W: thunderstorms (a convective SIGMET) up to 28,000 ft, moving from the southwest at 20 knots, until 3:55 am EDT (07:55 UTC). Over the route from 1909 to 2019 nm out.
as issued
```
WSUS33 KKCI 120555
MKCW WST 120555
CONVECTIVE SIGMET 15W
VALID UNTIL 0755Z
UT NV
FROM 60WNW BVL-10NE BVL-80E OAL-40SE OAL-20W OAL-60WNW BVL
AREA TS MOV FROM 24020KT. TOPS TO FL280.
```
AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the first 600 nm of the route.
AIRMET ZULU 1C: moderate icing up to 22,000 ft. Over the first 200 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the first 250 nm of the route.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 10,000 ft. Over the first 60 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 30 to 200 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 770 to 1360 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 1240 to 1390 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the route from 1390 to 1759 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 1430 to 1939 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 1480 to 1649 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 1550 to 2069 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1560 to 2059 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 1560 to 1649 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 120 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 MHT.

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

UAL330 at 35,000 ft, 4 nm west, 12:30 am EDT (04:30 UTC): moderate turbulence, wind 235° at 92 knots. At the departure end, 4 nm west of the line.
as filed, and in English
```
ARP UAL330 4257N 07145W 0430 F350 235/092KT TB MOD TURB CONT MOD CHOP IC
```
Report
a routine report filed through ARP
B38M at 30,000 ft, 36 nm north, 1:45 am EDT (05:45 UTC): moderate chop turbulence. 1570 nm along the route, 36 nm north of the line.
as filed, and in English
```
RIW UA /OV BOY126080/TM 0545/FL300/TP B38M/TB CONS MOD CHOP /ZLC
```
Report
a routine report filed through RIW
Where
80 nm southeast (126°) of BOY
Time
05:45 UTC
Height
at 30,000 ft
Aircraft
B38M
Turbulence
continuous moderate chop zlc
B763 descending, 0 nm east, 2:21 am EDT (06:21 UTC): overcast above 40,000 ft. At the departure end, 0 nm east of the line.
as filed, and in English
```
MHT UA /OV KMHT/TM 0621/FLDURD/TP B763/SK OVC004
```
Report
a routine report filed through MHT
Where
over KMHT
Time
06:21 UTC
Height
during the descent
Aircraft
B763
Sky
overcast from 400 ft
B763 descending, 0 nm east, 1:55 am EDT (05:55 UTC): a routine report with nothing remarked on. At the departure end, 0 nm east of the line.
as filed, and in English
```
MHT UA /OV RWY 35/TM 0555/FLDURD/TP B763/SK 004-005 FT
```
Report
a routine report filed through MHT
Where
runway 35
Time
05:55 UTC
Height
during the descent
Aircraft
B763
Sky
from 400 ft to 500 ft ft
CRJ7 descending, 0 nm east, 12:09 am EDT (04:09 UTC): a routine report with nothing remarked on. At the departure end, 0 nm east of the line.
as filed, and in English
```
MHT UA /OV RWY 6/TM 0409/FLDURD/TP CRJ7/SK 006
```
Report
a routine report filed through MHT
Where
runway 6
Time
04:09 UTC
Height
during the descent
Aircraft
CRJ7
Sky
at 600 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 20 forecast points nearest it (BOS, ALB, SYR, BUF, CLE, TVC, MKG, GRB, LSE, MCW, FSD, 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	+11 kt	20 °C	109 kt	21 h 17 min	8:51 pm PDT (03:51 UTC)
6,500 ft	240° at 11 kt	+11 kt	13 °C	109 kt	21 h 17 min	8:51 pm PDT (03:51 UTC)
8,500 ft	230° at 13 kt	+12 kt	8 °C	108 kt	21 h 28 min	9:02 pm PDT (04:02 UTC)
10,500 ft	240° at 14 kt	+14 kt	5 °C	106 kt	21 h 53 min	9:27 pm PDT (04:27 UTC)
12,500 ft	240° at 16 kt	+16 kt	1 °C	104 kt	22 h 18 min	9:52 pm PDT (04:52 UTC)
14,500 ft	240° at 18 kt	+19 kt	-4 °C	101 kt	22 h 58 min	10:32 pm PDT (05:32 UTC)
16,500 ft	250° at 20 kt	+21 kt	-8 °C	99 kt	23 h 25 min	10:59 pm PDT (05:59 UTC)
18,000 ft FL180	250° at 22 kt	+23 kt	-11 °C	97 kt	23 h 54 min	11:28 pm PDT (06:28 UTC)
24,000 ft FL240	240° at 27 kt	+27 kt	-22 °C	93 kt	24 h 56 min	12:30 am PDT (07:30 UTC)
30,000 ft FL300	250° at 34 kt	+35 kt	-33 °C	85 kt	27 h 17 min	2:51 am PDT (09:51 UTC)
34,000 ft FL340	250° at 43 kt	+44 kt	-39 °C	76 kt	30 h 31 min	6:05 am PDT (13:05 UTC)
39,000 ft FL390	260° at 50 kt	+51 kt	-48 °C	69 kt	33 h 37 min	9:11 am PDT (16:11 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
BOS	used from 0 nm out; 58 nm from the line	110/20	200/26 12°	280/24 8°	260/29 3°	250/47 -10°	230/59 -19°	230/74 -33°	240/95 -41°	240/96 -53°
ALB	used from 50 nm out; 38 nm from the line	120/9	270/8 10°	L/V 5°	260/9 1°	260/34 -10°	250/42 -22°	240/57 -35°	240/70 -42°	240/65 -50°
SYR	used from 150 nm out; 35 nm from the line	280/13	350/18 10°	340/10 6°	300/15 1°	280/17 -12°	270/16 -23°	280/25 -38°	250/40 -42°	240/53 -50°
BUF	used from 250 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 450 nm out; 143 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°
TVC	used from 500 nm out; 109 nm from the line	260/31	280/22 15°	290/18 10°	270/13 2°	290/25 -10°	300/35 -21°	310/52 -37°	320/59 -47°	300/84 -54°
MKG	used from 600 nm out; 46 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°
GRB	used from 700 nm out; 41 nm from the line	250/36	270/23 16°	270/14 9°	240/18 4°	280/26 -9°	280/29 -20°	290/42 -36°	290/51 -45°	290/72 -55°
LSE	used from 800 nm out; 41 nm from the line	230/40	240/24 17°	240/13 10°	250/13 6°	280/22 -9°	250/28 -21°	250/41 -34°	260/42 -44°	270/62 -53°
MCW	used from 900 nm out; 42 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°
FSD	used from 1050 nm out; 33 nm from the line	190/9	230/30 18°	240/23 13°	240/20 6°	260/22 -9°	250/31 -21°	250/43 -36°	260/49 -43°	270/53 -47°
ONL	used from 1150 nm out; 44 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 1300 nm out; 99 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 1550 nm out; 86 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 1749 nm out; 26 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 1899 nm out; 49 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 1999 nm out; 67 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 2099 nm out; 66 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 2199 nm out; 47 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 2299 nm out; 10 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
MHT Manchester, NH	departure	marginal VFR Sky: scattered clouds at 400 feet, overcast at 1,200 feet Weather: light rain, mist	from the north (360°) at 4 knots	5 mi	1,200 ft	266 ft	1:53 am EDT (05:53 UTC)
RME Rome, NY	170 nm out, 9 nm southwest of the line, tower	VFR Sky: a few clouds at 200 feet, overcast at 3,200 feet	from the east-southeast (110°) at 3 knots	10+ mi	3,200 ft	504 ft	06:26 UTC
CYYZ Toronto,	360 nm out, 1 nm northwest of the line	marginal VFR Sky: overcast at 3,000 feet Weather: mist	from the northwest (320°) at 6 knots	3 mi	3,000 ft	569 ft	06:00 UTC
MBS Saginaw, MI	550 nm out, 18 nm south of the line, tower	VFR	from the southwest (220°) at 8 knots	8 mi	none	668 ft	05:53 UTC
LSE La Crosse, WI	860 nm out, 11 nm northwest of the line, tower	VFR	from the south-southwest (200°) at 12 knots	10+ mi	none	655 ft	05:53 UTC
FSD Sioux Falls, SD	1100 nm out, 17 nm north of the line, tower	VFR	from the north-northeast (020°) at 7 knots	10+ mi	none	1,430 ft	05:56 UTC
VTN Valentine, NE	1270 nm out, 5 nm west of the line	low IFR Sky: overcast at 400 feet	from the east-northeast (060°) at 8 knots	8 mi	400 ft	2,595 ft	06:17 UTC
GUR Guernsey, WY	1460 nm out, 3 nm west of the line, tower	VFR	from the northeast (040°) at 5 knots	10+ mi	none	4,401 ft	05:55 UTC
SLC Salt Lake City, UT	1799 nm out, 3 nm northwest of the line, tower	VFR Sky: a few clouds at 1,700 feet, a few clouds at 4,400 feet, overcast at 17,000 feet	from the southeast (130°) at 7 knots	10+ mi	17,000 ft	4,230 ft	05:54 UTC
TMT Austin, NV	2049 nm out, 9 nm northwest of the line	VFR Sky: scattered clouds at 5,000 feet, a broken layer at 11,000 feet	calm	10+ mi	11,000 ft	5,735 ft	06:15 UTC
LVK Livermore, CA	2289 nm out, 8 nm south of the line, tower	VFR	calm	10+ mi	none	399 ft	05:53 UTC
SFO San Francisco, CA	destination	VFR Sky: a few clouds at 2,000 feet	from the south (180°) at 8 knots	10+ mi	none	13 ft	10:56 pm PDT (05:56 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 SFO when you get there the forecast at the estimated arrival, 8:51 pm PDT (03:51 UTC)

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

The whole forecast for SFO

From Sun 11:00 pm PDT (06:00 UTC): wind from the south at 6 knots, visibility more than 6 miles, a few clouds at 2,000 feet
From Mon 11:00 am PDT (18:00 UTC): wind from the 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 12 knots, visibility more than 6 miles, clear skies
From Mon 8:00 pm PDT (03:00 UTC): wind from the west at 6 knots, visibility more than 6 miles, clear skies

The forecast for MHT, the departure

From Mon 2:00 am EDT (06:00 UTC): wind from the north at 5 knots, visibility 4 miles, light rain, mist, scattered clouds at 400 feet, overcast at 1,000 feet
From Mon 11:00 am EDT (15:00 UTC): wind from the northwest at 6 knots, visibility more than 6 miles, a broken layer at 5,000 feet
From Tue 1:00 am EDT (05:00 UTC): wind light and variable, visibility 3 miles, mist, overcast at 1,500 feet

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

6/7231 Santa Clara, CA, Sunday, October 11, 2026 through Monday, October 12, 2026 UTC 19 nm from the route, at the destination end · drones kept away from a public gathering · until 12 October · ZOA

Daylight

Sunset at MHT 6:08 pm EDT (22:08 UTC), at SFO 6:36 pm PDT (01:36 UTC) (civil twilight ends 7:02 pm PDT (02:02 UTC)). At 120 knots the arrival at SFO is after sunset there (6:36 pm PDT (01:36 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: Manchester Boston Regional, San Francisco International.