Plan a flight · Sun 8:30 pm PDT (03:30 UTC)

San Francisco International to General Edward Lawrence Logan International SFO → BOS

2,344 nautical miles (2,698 statute miles) northeast on a straight line, true course 066°, about 052° magnetic at the departure end (variation 14E). At 120 knots that is 13 h 47 min at the quickest height in today's winds (39,000 ft, a 50-knot tailwind), arriving about 1:17 pm EDT (17:17 UTC). 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: 9,306 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 W12W: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the southwest at 20 knots, until 9:55 pm PDT (04:55 UTC). Over the route from 239 to 369 nm out.
as issued
```
WSUS33 KKCI 120255
MKCW WST 120255
CONVECTIVE SIGMET 12W
VALID UNTIL 0455Z
NV
FROM 40SSE TWF-10W ELY-30SE OAL-30W OAL-70WSW TWF-40SSE TWF
AREA TS MOV FROM 24020KT. TOPS TO FL310.
```
SIGMET 2C: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the southwest at 40 knots, until 9:55 pm PDT (04:55 UTC). Over the route from 778 to 878 nm out.
as issued
```
WSUS32 KKCI 120255
MKCC WST 120255
CONVECTIVE SIGMET 2C
VALID UNTIL 0455Z
NE CO WY
FROM 40SE CZI-30WNW BFF-30SSE LAR-70NW LAR-40SE CZI
AREA TS MOV FROM 22040KT. TOPS TO FL310.
```
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 120 nm of the route.
AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Near the route, 180 nm along the route.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 199 to 718 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 269 to 728 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 499 to 968 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 529 to 888 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 598 to 828 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 598 to 688 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 1317 to 1347 nm out.
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 last 608 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 349 nm of the route.
AIRMET ZULU 1C: moderate icing up to 25,000 ft. Over the last 259 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 2105 to 2264 nm out.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 13,000 ft. Over the last 180 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 SFO.

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

urgent B39M at 35,000 ft, 47 nm south, 8:15 pm PDT (03:15 UTC): remarks: no inj/dmg zob. 1945 nm along the route, 47 nm south of the line.
as filed, and in English
```
DKK UUA /OV DKK280040/TM 0315/FL350/TP B39M/TB MTN WVE ACTN +/-5KTS/RM NO INJ/DMG ZOB
```
Report
an urgent report filed through DKK
Where
40 nm west (280°) of DKK
Time
03:15 UTC
Height
at 35,000 ft
Aircraft
B39M
Turbulence
mountain wve actn a 5-knot loss of airspeed
Remarks
no inj/dmg zob
CRJ7 at 20,000 ft, 38 nm north, 5:50 pm PDT (00:50 UTC): moderate turbulence. 2224 nm along the route, 38 nm north of the line.
as filed, and in English
```
ALB UA /OV CAM360020/TM 0050/FL200/TP CRJ7/TB MOD
```
Report
a routine report filed through ALB
Where
20 nm north (360°) of CAM
Time
00:50 UTC
Height
at 20,000 ft
Aircraft
CRJ7
Turbulence
moderate
GLF4 at 10,000 ft, 14 nm south, 6:03 pm PDT (01:03 UTC): moderate turbulence above 10,000 ft, light rain, remarks: instrument conditions. At the destination end, 14 nm south of the line.
as filed, and in English
```
BDL UA /OV CEF060010/TM 0103/FL100/TP GLF4/WX -RA/TB MOD 100/RM IMC
```
Report
a routine report filed through BDL
Where
10 nm northeast (060°) of CEF
Time
01:03 UTC
Height
at 10,000 ft
Aircraft
GLF4
Weather
light rain
Turbulence
moderate at 10,000 ft
Remarks
instrument conditions
A333 at 15,000 ft, 44 nm north, 6:37 pm PDT (01:37 UTC): moderate chop turbulence up to 15,000 ft, remarks: during the climb. At the destination end, 44 nm north of the line.
as filed, and in English
```
PSM UA /OV PSM/TM 0137/FL150/TP A333/TB MOD CHOP BLO 150/RM DURC
```
Report
a routine report filed through PSM
Where
over PSM
Time
01:37 UTC
Height
at 15,000 ft
Aircraft
A333
Turbulence
moderate chop below 15,000 ft
Remarks
during the climb
A321 at 5,000 ft, 21 nm southeast, 5:46 pm PDT (00:46 UTC): moderate turbulence from 5,000 ft to 15,000 ft. At the destination end, 21 nm southeast of the line.
as filed, and in English
```
BOS UA /OV BOS150020/TM 0046/FL050/TP A321/TB MOD 150-050
```
Report
a routine report filed through BOS
Where
20 nm southeast (150°) of BOS
Time
00:46 UTC
Height
at 5,000 ft
Aircraft
A321
Turbulence
moderate from 15,000 ft to 5,000 ft
B38M descending, 48 nm north, 6:28 pm PDT (01:28 UTC): light chop turbulence, remarks: during the descent runway 35L rno. 150 nm along the route, 48 nm north of the line.
as filed, and in English
```
RNO UA /OV KRNO167009/TM 0128/FLUNKN/TP B38M/TB OCNL LGT CHOP/RM DURD RY35L RNO
```
Report
a routine report filed through RNO
Where
9 nm south (167°) of KRNO
Time
01:28 UTC
Height
height not given
Aircraft
B38M
Turbulence
occasional light chop
Remarks
during the descent runway 35L rno
PRM1 at 21,000 ft, 41 nm south, 6:03 pm PDT (01:03 UTC): light rime icing, -15 °C. 499 nm along the route, 41 nm south of the line.
as filed, and in English
```
PVU UA /OV FFU180025/TM 0103/FL210/TP PRM1/TA M15/IC LGT RIME /ZLC
```
Report
a routine report filed through PVU
Where
25 nm south (180°) of FFU
Time
01:03 UTC
Height
at 21,000 ft
Aircraft
PRM1
Temperature
−15 °C
Icing
light rime zlc
B737 at 16,000 ft, 11 nm north, 5:45 pm PDT (00:45 UTC): no turbulence, light rime icing from 13,000 ft to 17,000 ft, 8 °C, remarks: during the climb. 499 nm along the route, 11 nm north of the line.
as filed, and in English
```
SLC UA /OV TCH230020/TM 0045/FL160/TP B737/TA 8/TB NEG/IC LT RIME 130-170/RM DURC
```
Report
a routine report filed through SLC
Where
20 nm southwest (230°) of TCH
Time
00:45 UTC
Height
at 16,000 ft
Aircraft
B737
Temperature
8 °C
Turbulence
none
Icing
lt rime from 13,000 ft to 17,000 ft
Remarks
during the climb
UAL2395 at 37,000 ft, 19 nm north, 5:58 pm PDT (00:58 UTC): no turbulence, wind 240° at 70 knots. 658 nm along the route, 19 nm north of the line.
as filed, and in English
```
ARP UAL2395 4135N 10900W 0058 F370 240/070KT TB NONE SK CLEAR IC NONE
```
Report
a routine report filed through ARP
C56X at 13,000 ft, 31 nm south, 6:33 pm PDT (01:33 UTC): light chop turbulence, remarks: zdvwc. 798 nm along the route, 31 nm south of the line.
as filed, and in English
```
LAR UA /OV LAR/TM 0133/FL130/TP C56X/SK BASE160/TB OCNL CONS LGT CHOP/RM ZDVWC
```
Report
a routine report filed through LAR
Where
over LAR
Time
01:33 UTC
Height
at 13,000 ft
Aircraft
C56X
Sky
BASE160
Turbulence
occasional continuous light chop
Remarks
zdvwc
E295 at 37,000 ft, 20 nm south, 5:53 pm PDT (00:53 UTC): light chop turbulence. 1586 nm along the route, 20 nm south of the line.
as filed, and in English
```
UES UA /OV BAE/TM 0053/FL370/TP E295/TB OCNL LGT CHOP
```
Report
a routine report filed through UES
Where
over BAE
Time
00:53 UTC
Height
at 37,000 ft
Aircraft
E295
Turbulence
occasional light chop
A21N at 31,000 ft, 11 nm north, 5:39 pm PDT (00:39 UTC): light turbulence above 31,000 ft, remarks: zob. 1736 nm along the route, 11 nm north of the line.
as filed, and in English
```
MOP UA /OV MOP/TM 0039/FL310/TP A21N/TB CONS LGT 310/RM ZOB
```
Report
a routine report filed through MOP
Where
over MOP
Time
00:39 UTC
Height
at 31,000 ft
Aircraft
A21N
Turbulence
continuous light at 31,000 ft
Remarks
zob
A320 descending, 28 nm south, 6:35 pm PDT (01:35 UTC): overcast from 1,900 ft to 3,000 ft, remarks: on final runway 09 fnt. 1776 nm along the route, 28 nm south of the line.
as filed, and in English
```
FNT UA /OV FNT270008/TM 0135/FLDURD/TP A320/SK OVC019 - TOP030/RM ON FINAL RY09 FNT
```
Report
a routine report filed through FNT
Where
8 nm west (270°) of FNT
Time
01:35 UTC
Height
during the descent
Aircraft
A320
Sky
overcast from 1,900 ft, tops 3,000 ft
Remarks
on final runway 09 fnt
A320 descending, 27 nm south, 7:09 pm PDT (02:09 UTC): overcast from 1,600 ft to 3,000 ft, remarks: on final runway 18 fnt. 1785 nm along the route, 27 nm south of the line.
as filed, and in English
```
FNT UA /OV FNT/TM 0209/FLDURD/TP A320/SK OVC016 - TOP030/RM ON FINAL RY18 FNT
```
Report
a routine report filed through FNT
Where
over FNT
Time
02:09 UTC
Height
during the descent
Aircraft
A320
Sky
overcast from 1,600 ft, tops 3,000 ft
Remarks
on final runway 18 fnt

16 more routine reports are on the map.

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 20 forecast points nearest it (SFO, SAC, RNO, BAM, ELY, SLC, RKS, BFF, ONL, FSD, MCW, LSE, GRB, MKG, CLE, BUF, SYR, ALB, BDL, BOS). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
3,500 ft	240° at 12 kt	−11 kt		131 kt	17 h 54 min	5:24 pm EDT (21:24 UTC)
5,500 ft	240° at 10 kt	−10 kt	20 °C	130 kt	18 h 02 min	5:32 pm EDT (21:32 UTC)
7,500 ft	230° at 13 kt	−12 kt	10 °C	132 kt	17 h 45 min	5:15 pm EDT (21:15 UTC)
9,500 ft	240° at 13 kt	−13 kt	6 °C	133 kt	17 h 37 min	5:07 pm EDT (21:07 UTC)
11,500 ft	240° at 16 kt	−15 kt	3 °C	135 kt	17 h 22 min	4:52 pm EDT (20:52 UTC)
13,500 ft	240° at 17 kt	−17 kt	-1 °C	137 kt	17 h 07 min	4:37 pm EDT (20:37 UTC)
15,500 ft	240° at 19 kt	−20 kt	-6 °C	140 kt	16 h 45 min	4:15 pm EDT (20:15 UTC)
17,500 ft	250° at 21 kt	−22 kt	-10 °C	142 kt	16 h 30 min	4:00 pm EDT (20:00 UTC)
18,000 ft FL180	250° at 22 kt	−23 kt	-11 °C	143 kt	16 h 23 min	3:53 pm EDT (19:53 UTC)
24,000 ft FL240	240° at 27 kt	−27 kt	-22 °C	147 kt	15 h 57 min	3:27 pm EDT (19:27 UTC)
30,000 ft FL300	250° at 34 kt	−35 kt	-33 °C	155 kt	15 h 07 min	2:37 pm EDT (18:37 UTC)
34,000 ft FL340	250° at 44 kt	−45 kt	-39 °C	165 kt	14 h 12 min	1:42 pm EDT (17:42 UTC)
39,000 ft FL390	260° at 49 kt	−50 kt	-48 °C	170 kt	13 h 47 min	1:17 pm EDT (17:17 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
SFO	used from 0 nm out; 25 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°
SAC	used from 50 nm out; 36 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°
RNO	used from 100 nm out; 65 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°
BAM	used from 249 nm out; 77 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°
ELY	used from 299 nm out; 55 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°
SLC	used from 449 nm out; 47 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°
RKS	used from 598 nm out; 41 nm from the line			200/41	220/44 1°	220/35 -11°	220/46 -24°	210/53 -27°	220/62 -35°	230/61 -44°
BFF	used from 798 nm out; 81 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°
ONL	used from 997 nm out; 103 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°
FSD	used from 1197 nm out; 34 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°
MCW	used from 1297 nm out; 41 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°
LSE	used from 1396 nm out; 45 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°
GRB	used from 1546 nm out; 65 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°
MKG	used from 1596 nm out; 54 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°
CLE	used from 1795 nm out; 127 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°
BUF	used from 1895 nm out; 83 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°
SYR	used from 2045 nm out; 46 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°
ALB	used from 2145 nm out; 49 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°
BDL	used from 2244 nm out; 39 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°
BOS	used from 2294 nm out; 25 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°

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	Elevation
SFO San Francisco, CA	departure	no report just now	13 ft
LVK Livermore, CA	30 nm out, 7 nm south of the line, tower	no report just now	399 ft
TMT Austin, NV	269 nm out, 12 nm northwest of the line	no report just now	5,735 ft
SLC Salt Lake City, UT	519 nm out, 10 nm north of the line, tower	no report just now	4,230 ft
GUR Guernsey, WY	858 nm out, 13 nm north of the line, tower	no report just now	4,401 ft
ANW Ainsworth, NE	1067 nm out, 7 nm south of the line	no report just now	2,588 ft
SPW Spencer, IA	1277 nm out, 3 nm east of the line	no report just now	1,338 ft
MSN Madison, WI	1536 nm out, 18 nm south of the line, tower	no report just now	886 ft
MBS Saginaw, MI	1766 nm out, 6 nm north of the line, tower	no report just now	668 ft
ROC Rochester, NY	2045 nm out, 2 nm northeast of the line, tower	no report just now	558 ft
ALB Albany, NY	2214 nm out, 4 nm east of the line, tower	no report just now	284 ft
BOS Boston, MA	destination	no report just now	19 ft

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 BOS when you get there the forecast at the estimated arrival, 1:17 pm EDT (17:17 UTC)

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

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 departure end · drones kept away from a public gathering · until 12 October · ZOA
6/6740 SACRAMENTO, CA, Thursday, October 8, 2026 through Sunday, October 11, 2026 Local 24 nm from the route, at the departure end · air shows/sports · ended 11 October · ZOA
6/8802 Foxborough, MA, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 17 nm from the route, at the destination end · drones kept away from a public gathering · starts Saturday 17 October · ZBW

Daylight

Sunset at SFO 6:36 pm PDT (01:36 UTC), at BOS 6:07 pm EDT (22:07 UTC) (civil twilight ends 6:35 pm EDT (22:35 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 Pacific Southwest · loop National Weather Service

Radar now, the southern Rockies · loop National Weather Service

Radar now, the northern 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, General Edward Lawrence Logan International.