Plan a flight · Sun 10:24 pm CDT (03:24 UTC)

St. Louis Lambert International to General Edward Lawrence Logan International STL → BOS

907 nautical miles (1,044 statute miles) east on a straight line, true course 070°, about 071° magnetic at the departure end (variation 1W). At 120 knots that is 5 h 44 min at the quickest height in today's winds (34,000 ft, a 38-knot tailwind), arriving about 5:08 am EDT (09:08 UTC), after sunset at the destination. Right now STL is VFR, wind from the south (170°) at 8 knots; BOS is IFR, wind from the east-northeast (060°) at 12 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: 3,168 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 E10E: thunderstorms (a convective SIGMET) up to 39,000 ft, moving from the southwest at 35 knots, until 11:55 pm CDT (04:55 UTC). Near the route, 868 nm along the route.

as issued

WSUS31 KKCI 120255
MKCE WST 120255
CONVECTIVE SIGMET 10E
VALID UNTIL 0455Z
MA RI CT NY AND MA RI NJ NY CT CSTL WTRS
FROM 20NW PVD-70SSE ACK-190SSE HTO-70ESE CYN-30SW BDL-20NW PVD
AREA EMBD TS MOV FROM 24035KT. TOPS TO FL390.

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 738 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 419 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 509 to 788 nm out.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 13,000 ft. Over the last 229 nm of the route.
AIRMET ZULU 1C: moderate icing up to 25,000 ft. Over the last 80 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 STL.

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

A320 at 34,000 ft, 29 nm north, 9:03 pm CDT (02:03 UTC): moderate chop turbulence. 299 nm along the route, 29 nm north of the line.
as filed, and in English
```
FWA UA /OV FWA115040/TM 0203/FL340/TP A320/TB MOD CHOP
```
Report
a routine report filed through FWA
Where
40 nm southeast (115°) of FWA
Time
02:03 UTC
Height
at 34,000 ft
Aircraft
A320
Turbulence
moderate chop
E75S at 16,000 ft, 22 nm south, 7:28 pm CDT (00:28 UTC): moderate chop turbulence. 808 nm along the route, 22 nm south of the line.
as filed, and in English
```
POU UA /OV PWL100025/TM 0028/FL160/TP E75S/TB MOD CHOP
```
Report
a routine report filed through POU
Where
25 nm east (100°) of PWL
Time
00:28 UTC
Height
at 16,000 ft
Aircraft
E75S
Turbulence
moderate chop
GLF4 at 10,000 ft, 5 nm north, 8:03 pm CDT (01:03 UTC): moderate turbulence above 10,000 ft, light rain, remarks: instrument conditions. 848 nm along the route, 5 nm north 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, 8:37 pm CDT (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, 7:46 pm CDT (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
A21N at 17,000 ft, 49 nm south, 8:28 pm CDT (01:28 UTC): no icing, clear from 17,000 ft to 60,000 ft, remarks: clear since departing KIND southbound. 189 nm along the route, 49 nm south of the line.
as filed, and in English
```
IND UA /OV IND183045/TM 0128/FL170/TP A21N/SK SKC/IC NEG/RM CLR SINCE DEPARTING KIND SOUTHBOUND
```
Report
a routine report filed through IND
Where
45 nm south (183°) of IND
Time
01:28 UTC
Height
at 17,000 ft
Aircraft
A21N
Sky
clear
Icing
none
Remarks
clear since departing KIND southbound
CRJ9 descending, 23 nm southeast, 8:15 pm CDT (01:15 UTC): a routine report with nothing remarked on. 289 nm along the route, 23 nm southeast of the line.
as filed, and in English
```
DAY UA /OV DAY/TM 0115/FLDURD/TP CRJ9/SK T031 B005
```
Report
a routine report filed through DAY
Where
over DAY
Time
01:15 UTC
Height
during the descent
Aircraft
CRJ9
Sky
T031 B005
BCS3 climbing, 34 nm southeast, 9:27 pm CDT (02:27 UTC): a routine report with nothing remarked on. 349 nm along the route, 34 nm southeast of the line.
as filed, and in English
```
CMH UA /OV CMH/TM 0227/FLDURC/TP BCS3/SK B010
```
Report
a routine report filed through CMH
Where
over CMH
Time
02:27 UTC
Height
during the climb
Aircraft
BCS3
Sky
B010
BCS3 at 3,000 ft, 34 nm southeast, 7:27 pm CDT (00:27 UTC): a routine report with nothing remarked on. 349 nm along the route, 34 nm southeast of the line.
as filed, and in English
```
CMH UA /OV CMH/TM 0027/FL030/TP BCS3/SK T037
```
Report
a routine report filed through CMH
Where
over CMH
Time
00:27 UTC
Height
at 3,000 ft
Aircraft
BCS3
Sky
T037
CRJ7 descending, 4 nm northeast, 8:17 pm CDT (01:17 UTC): remarks: bases 2,000 ft. 429 nm along the route, 4 nm northeast of the line.
as filed, and in English
```
CAK UA /OV CAK/TM 0117/FLDURD/TP CRJ7/RM BASES 020
```
Report
a routine report filed through CAK
Where
over CAK
Time
01:17 UTC
Height
during the descent
Aircraft
CRJ7
Remarks
bases 2,000 ft
C68A at 2,700 ft, 35 nm south, 7:45 pm CDT (00:45 UTC): overcast above 2,700 ft, remarks: landing runway 10R. 479 nm along the route, 35 nm south of the line.
as filed, and in English
```
PIT UA /OV KPIT/TM 0045/FL027/TP C68A/SK OVC027/RM LANDING RWY 10R
```
Report
a routine report filed through PIT
Where
over KPIT
Time
00:45 UTC
Height
at 2,700 ft
Aircraft
C68A
Sky
overcast from 2,700 ft
Remarks
landing runway 10R
CRJ7 at 3,100 ft, 28 nm south, 8:24 pm CDT (01:24 UTC): a routine report with nothing remarked on. 688 nm along the route, 28 nm south of the line.
as filed, and in English
```
AVP UA /OV AVP/TM 0124/FL031/TP CRJ7/SK TOP031
```
Report
a routine report filed through AVP
Where
over AVP
Time
01:24 UTC
Height
at 3,100 ft
Aircraft
CRJ7
Sky
TOP031
BCS3 at 2,500 ft, 28 nm south, 8:04 pm CDT (01:04 UTC): overcast above 2,500 ft. 688 nm along the route, 28 nm south of the line.
as filed, and in English
```
AVP UA /OV AVP/TM 0104/FL025/TP BCS3/SK OVC025
```
Report
a routine report filed through AVP
Where
over AVP
Time
01:04 UTC
Height
at 2,500 ft
Aircraft
BCS3
Sky
overcast from 2,500 ft
E145 at 24,000 ft, 13 nm north, 7:59 pm CDT (00:59 UTC): a routine report with nothing remarked on. 788 nm along the route, 13 nm north of the line.
as filed, and in English
```
ALB UA /OV 1B1/TM 0059/FL240/TP E145/TB CONS MMOD CHOP
```
Report
a routine report filed through ALB
Where
over 1B1
Time
00:59 UTC
Height
at 24,000 ft
Aircraft
E145
Turbulence
continuous mmod chop

13 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 12 forecast points nearest it (STL, SPI, IND, FWA, CMH, CLE, AGC, PSB, AVP, 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	300° at 6 kt	−4 kt		124 kt	7 h 19 min	6:43 am EDT (10:43 UTC)
5,500 ft	310° at 12 kt	−6 kt	13 °C	126 kt	7 h 12 min	6:36 am EDT (10:36 UTC)
7,500 ft	310° at 15 kt	−9 kt	11 °C	129 kt	7 h 02 min	6:26 am EDT (10:26 UTC)
9,500 ft	310° at 16 kt	−10 kt	7 °C	130 kt	6 h 59 min	6:23 am EDT (10:23 UTC)
11,500 ft	300° at 14 kt	−10 kt	4 °C	130 kt	6 h 59 min	6:23 am EDT (10:23 UTC)
13,500 ft	300° at 16 kt	−12 kt	0 °C	132 kt	6 h 52 min	6:16 am EDT (10:16 UTC)
15,500 ft	290° at 19 kt	−14 kt	-4 °C	134 kt	6 h 46 min	6:10 am EDT (10:10 UTC)
17,500 ft	290° at 22 kt	−17 kt	-8 °C	137 kt	6 h 37 min	6:01 am EDT (10:01 UTC)
18,000 ft FL180	290° at 22 kt	−18 kt	-9 °C	138 kt	6 h 34 min	5:58 am EDT (09:58 UTC)
24,000 ft FL240	290° at 26 kt	−20 kt	-21 °C	140 kt	6 h 29 min	5:53 am EDT (09:53 UTC)
30,000 ft FL300	290° at 33 kt	−26 kt	-35 °C	146 kt	6 h 13 min	5:37 am EDT (09:37 UTC)
34,000 ft FL340	280° at 45 kt	−38 kt	-42 °C	158 kt	5 h 44 min	5:08 am EDT (09:08 UTC)
39,000 ft FL390	290° at 44 kt	−36 kt	-49 °C	156 kt	5 h 49 min	5:13 am EDT (09:13 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
STL	used from 0 nm out; 25 nm from the line	250/24	250/24 16°	260/23 9°	270/16 6°	260/25 -6°	270/29 -19°	290/34 -33°	290/48 -41°	290/54 -51°
SPI	used from 50 nm out; 56 nm from the line	220/21	250/23 16°	260/27 9°	270/14 6°	270/23 -7°	270/31 -19°	270/28 -33°	290/48 -42°	300/55 -52°
IND	used from 100 nm out; 74 nm from the line	290/16	310/20 16°	320/21 10°	330/13 3°	300/25 -7°	320/32 -19°	330/46 -34°	320/61 -43°	320/63 -50°
FWA	used from 249 nm out; 52 nm from the line	300/17	320/20 16°	330/20 10°	340/15 3°	310/27 -8°	320/37 -20°	330/52 -36°	330/65 -43°	330/60 -50°
CMH	used from 299 nm out; 45 nm from the line	330/15	340/22 14°	340/24 9°	340/23 4°	340/35 -9°	340/49 -20°	340/58 -37°	330/70 -42°	340/55 -47°
CLE	used from 399 nm out; 36 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°
AGC	used from 449 nm out; 49 nm from the line	350/14	330/20 11°	340/18 8°	330/17 3°	340/22 -11°	340/31 -22°	330/33 -36°	300/34 -41°	300/35 -47°
PSB	used from 548 nm out; 34 nm from the line		360/13 13°	330/14 7°	300/11 3°	290/12 -11°	240/23 -23°	270/25 -36°	250/34 -40°	250/45 -48°
AVP	used from 648 nm out; 32 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°
ALB	used from 748 nm out; 44 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 798 nm out; 17 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 848 nm out; 35 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	Wind	Visibility	Ceiling	Elevation	Reported
STL St Louis, MO	departure	VFR Sky: scattered clouds at 25,000 feet	from the south (170°) at 8 knots	10+ mi	none	617 ft	9:51 pm CDT (02:51 UTC)
ALN Alton/St Louis, IL	20 nm out, 4 nm northwest of the line, tower	VFR	from the south-southeast (160°) at 3 knots	10+ mi	none	543 ft	03:15 UTC
HUF Terre Haute, IN	150 nm out, 7 nm south of the line, tower	marginal VFR Weather: mist	calm	3 mi	none	589 ft	03:00 UTC
IND Indianapolis, IN	199 nm out, 6 nm south of the line, tower	VFR	calm	10+ mi	none	796 ft	02:54 UTC
DAY Dayton, OH	289 nm out, 23 nm southeast of the line, tower	marginal VFR Sky: overcast at 1,200 feet	from the west-northwest (290°) at 7 knots	8 mi	1,200 ft	1,009 ft	02:56 UTC
CAK Akron, OH	429 nm out, 4 nm northeast of the line, tower	marginal VFR Sky: scattered clouds at 800 feet, overcast at 1,600 feet Weather: light drizzle	from the northwest (320°) at 4 knots	8 mi	1,600 ft	1,225 ft	03:12 UTC
YNG Youngstown/Warren, OH	469 nm out, 15 nm north of the line, tower	marginal VFR Sky: a broken layer at 1,900 feet, overcast at 10,000 feet	from the north-northwest (340°) at 4 knots	10+ mi	1,900 ft	1,191 ft	02:51 UTC
OYM St Marys, PA	568 nm out, 1 nm northwest of the line	no report just now				1,934 ft
IPT Williamsport, PA	638 nm out, 24 nm south of the line, tower	marginal VFR Sky: overcast at 2,300 feet	calm	10+ mi	2,300 ft	528 ft	02:54 UTC
GBR Great Barrington, MA	798 nm out, 5 nm northeast of the line	no report just now				739 ft
CEF Springfield/Chicopee, MA	838 nm out, 1 nm southeast of the line, tower	VFR Sky: scattered clouds at 500 feet, overcast at 3,300 feet Weather: rain	from the north (010°) at 9 knots	7 mi	3,300 ft	241 ft	02:55 UTC
BOS Boston, MA	destination	IFR Sky: a few clouds at 700 feet, a broken layer at 1,700 feet, overcast at 4,100 feet Weather: heavy rain, mist	from the east-northeast (060°) at 12 knots	2.5 mi	1,700 ft	19 ft	11:10 pm EDT (03:10 UTC)

The highest airport on this list sits at 1,934 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, 5:08 am EDT (09:08 UTC)

Wind from the northeast at 8 knots, visibility 2 miles, light rain showers, mist, overcast at 300 feet low IFR

The whole forecast for BOS

From Sun 8:00 pm EDT (00:00 UTC): wind from the southeast at 4 knots, visibility 4 miles, heavy rain, mist, scattered clouds at 2,200 feet, a broken layer at 2,800 feet and more above
From Sun 10:00 pm EDT (02:00 UTC): wind from the east-southeast at 5 knots, visibility 3 miles, light rain, mist, overcast at 1,000 feet
From Sun 11:00 pm EDT (03:00 UTC): wind from the east at 6 knots, visibility 2 miles, light rain, mist, overcast at 800 feet
From Mon 2:00 am EDT (06:00 UTC): wind from the northeast at 8 knots, visibility 2 miles, light rain showers, mist, overcast at 300 feet
From Mon 9:00 am EDT (13:00 UTC): wind from the north at 7 knots, visibility 3 miles, mist, a broken layer at 800 feet
From Mon 1:00 pm EDT (17:00 UTC): wind from the north-northwest at 5 knots, visibility more than 6 miles, scattered clouds at 15,000 feet
From Mon 11:00 pm EDT (03:00 UTC): wind from the north-northeast at 5 knots, visibility more than 6 miles, scattered clouds at 4,500 feet

The forecast for STL, the departure

From Sun 10:00 pm CDT (03:00 UTC): wind from the south at 6 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 1:00 am CDT (06:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 11:00 am CDT (16:00 UTC): wind from the southwest at 12 knots, gusting to 20, visibility more than 6 miles, a few clouds at 25,000 feet

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

6/8587 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local on the route, 439 nm along the route · a VIP movement · today · ZOB
6/8888 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 13 nm from the route, 469 nm along the route · security · today · ZOB
6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local on the route, 469 nm along the route · a VIP movement · today · ZOB
6/7153 North Sicuate, RI, Saturday, October 10, 2026 through Monday, October 12, 2026 UTC 24 nm from the route, at the destination end · drones kept away from a public gathering · until 12 October · ZBW
6/8802 Foxborough, MA, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 14 nm from the route, at the destination end · drones kept away from a public gathering · starts Saturday 17 October · ZBW

Daylight

Sunset at STL 6:27 pm CDT (23:27 UTC), at BOS 6:07 pm EDT (22:07 UTC) (civil twilight ends 6:35 pm EDT (22:35 UTC)). At 120 knots the arrival at BOS is before sunrise there (6:53 am EDT (10:53 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 upper Mississippi valley · loop National Weather Service

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

Radar now, the Northeast · 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: St. Louis Lambert International, General Edward Lawrence Logan International.