Plan a flight · Mon 8:06 am EDT (12:06 UTC)

Buffalo Niagara International to St. Louis Downtown Airport BUF → CPS

581 nautical miles (669 statute miles) southwest on a straight line, true course 247°, about 258° magnetic at the departure end (variation 11W). At 120 knots that is 5 h 11 min at the quickest height in today's winds (6,500 ft, a 8-knot headwind), arriving about 12:17 pm CDT (17:17 UTC). Right now BUF is IFR, wind from the west-southwest (240°) at 5 knots; CPS is VFR, wind from the south-southeast (160°) 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: 5 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). Over the first 374 nm of the route.
AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 24,000 ft to 33,000 ft. Over the first 10 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 BUF.

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

B38M at 37,000 ft, 28 nm southeast, 7:36 am EDT (11:36 UTC): -48 °C, wind 335° at 62 knots, remarks: produced by skypath. At the departure end, 28 nm southeast of the line.
as filed, and in English
```
OLE UA /OV GEE249029 /TM 1136 /FL370 /TP B38M /TA M48 /WV 33562KT /RM PRODUCED BY SKYPATH
```
Report
a routine report filed through OLE
Where
29 nm west (249°) of GEE
Time
11:36 UTC
Height
at 37,000 ft
Aircraft
B38M
Temperature
−48 °C
Wind
from 335° at 62 knots
Remarks
produced by skypath
A321 at 32,000 ft, 48 nm east, 7:04 am EDT (11:04 UTC): light to moderate turbulence, remarks: occasional moderate from syr to iag zob. At the departure end, 48 nm east of the line.
as filed, and in English
```
ROC UA /OV ROC/TM 1104/FL320/TP A321/TB CONS LGT OCNL MOD/RM OCNL MOD FROM SYR TO IAG ZOB
```
Report
a routine report filed through ROC
Where
over ROC
Time
11:04 UTC
Height
at 32,000 ft
Aircraft
A321
Turbulence
continuous light occasional moderate
Remarks
occasional moderate from syr to iag zob
B738 climbing, 0 nm southwest, 6:20 am EDT (10:20 UTC): overcast from 2,500 ft to 4,200 ft; scattered clouds above 700 ft. At the departure end, 0 nm southwest of the line.
as filed, and in English
```
BUF UA /OV BUF/TM 1020/FLDURC/TP B738/SK SCT007 OVC025 TOPS042
```
Report
a routine report filed through BUF
Where
over BUF
Time
10:20 UTC
Height
during the climb
Aircraft
B738
Sky
SCT007 OVC025 TOPS042
A319 at 3,000 ft, 42 nm east, 6:17 am EDT (10:17 UTC): overcast above 3,000 ft, remarks: bases 3,000 ft tops 4,000 ft. At the departure end, 42 nm east of the line.
as filed, and in English
```
ROC UA /OV ROC220010/TM 1017/FL030/TP A319/SK 030 OVC/RM BASES 030 TOPS 040
```
Report
a routine report filed through ROC
Where
10 nm southwest (220°) of ROC
Time
10:17 UTC
Height
at 3,000 ft
Aircraft
A319
Sky
at 3,000 ft overcast
Remarks
bases 3,000 ft tops 4,000 ft
AC90 at 2,000 ft, 22 nm south, 7:05 am EDT (11:05 UTC): overcast from 2,000 ft to 4,000 ft. 79 nm along the route, 22 nm south of the line.
as filed, and in English
```
ERI UA /OV JUNOG/TM 1105/FL020/TP AC90/SK OVC020-TOP040
```
Report
a routine report filed through ERI
Where
junog
Time
11:05 UTC
Height
at 2,000 ft
Aircraft
AC90
Sky
overcast from 2,000 ft, tops 4,000 ft
AC90 at 2,000 ft, 22 nm southeast, 7:05 am EDT (11:05 UTC): remarks: bases reported at at 2,000 ft. 79 nm along the route, 22 nm southeast of the line.
as filed, and in English
```
ERI UA /OV KERI/TM 1105/FL020/TP AC90/RM BASES REPORTED AT 020
```
Report
a routine report filed through ERI
Where
over KERI
Time
11:05 UTC
Height
at 2,000 ft
Aircraft
AC90
Remarks
bases reported at at 2,000 ft
UAL2759 at 35,000 ft, 2 nm southwest, 7:14 am EDT (11:14 UTC): no turbulence, wind 313° at 72 knots. 148 nm along the route, 2 nm southwest of the line.
as filed, and in English
```
ARP UAL2759 4155N 08149W 1114 F350 313/072KT TB SMTH IC
```
Report
a routine report filed through ARP
C680 descending, 28 nm southeast, 7:53 am EDT (11:53 UTC): a routine report with nothing remarked on. 168 nm along the route, 28 nm southeast of the line.
as filed, and in English
```
CLE UA /OV DURD/TM 1153/FLDURD/TP C680/SK B022
```
Report
a routine report filed through CLE
Where
over DURD
Time
11:53 UTC
Height
during the descent
Aircraft
C680
Sky
B022
BE40 descending, 29 nm south, 7:03 am EDT (11:03 UTC): a routine report with nothing remarked on. 168 nm along the route, 29 nm south of the line.
as filed, and in English
```
CLE UA /OV CLE230005/TM 1103/FLDURD/TP BE40/SK B020 T031
```
Report
a routine report filed through CLE
Where
5 nm southwest (230°) of CLE
Time
11:03 UTC
Height
during the descent
Aircraft
BE40
Sky
B020 T031
A21N descending, 29 nm south, 6:11 am EDT (10:11 UTC): no turbulence, 12 °C. 168 nm along the route, 29 nm south of the line.
as filed, and in English
```
CLE UA /OV CLE230005/TM 1011/FLDURD/TP A21N/SK B018 T035/TA +12/TB SMOOTH
```
Report
a routine report filed through CLE
Where
5 nm southwest (230°) of CLE
Time
10:11 UTC
Height
during the descent
Aircraft
A21N
Sky
B018 T035
Temperature
+12
Turbulence
smooth
B717 at 400 ft, 45 nm north, 7:23 am EDT (11:23 UTC): remarks: bases 400 ft during the descent. 207 nm along the route, 45 nm north of the line.
as filed, and in English
```
DTW UA /OV DTW/TM 1123/FL004/TP B717/RM BASES 004 DURD
```
Report
a routine report filed through DTW
Where
over DTW
Time
11:23 UTC
Height
at 400 ft
Aircraft
B717
Remarks
bases 400 ft during the descent
BE58 climbing, 21 nm northwest, 7:34 am EDT (11:34 UTC): a routine report with nothing remarked on. 236 nm along the route, 21 nm northwest of the line.
as filed, and in English
```
TOL UA /OV TOL/TM 1134/FLDURC/TP BE58/SK B002 T018
```
Report
a routine report filed through TOL
Where
over TOL
Time
11:34 UTC
Height
during the climb
Aircraft
BE58
Sky
B002 T018
MD83 at 2,500 ft, 21 nm northwest, 6:43 am EDT (10:43 UTC): clear from 2,500 ft to 60,000 ft, remarks: base 1,000 ft tops 2,500 ft clear above. 236 nm along the route, 21 nm northwest of the line.
as filed, and in English
```
TOL UA /OV TOL/TM 1043/FL025/TP MD83/RM BASE 010 TOPS 025 CLEAR ABOVE
```
Report
a routine report filed through TOL
Where
over TOL
Time
10:43 UTC
Height
at 2,500 ft
Aircraft
MD83
Remarks
base 1,000 ft tops 2,500 ft clear above
A320 at 30,000 ft, 37 nm northwest, 7:49 am EDT (11:49 UTC): light chop turbulence, remarks: during the descent FL300-260 FL250 better. 315 nm along the route, 37 nm northwest of the line.
as filed, and in English
```
ASW UA /OV OLK/TM 1149/FL300/TP A320/TB CONS LGT CHOP/RM DURD FL300-260 FL250 BETTER
```
Report
a routine report filed through ASW
Where
over OLK
Time
11:49 UTC
Height
at 30,000 ft
Aircraft
A320
Turbulence
continuous light chop
Remarks
during the descent FL300-260 FL250 better

7 more routine reports are on the map.

Winds aloft along the route, and the time en route the forecast for use 08:00–15:00 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 6 forecast points nearest it (BUF, CLE, FWA, IND, SPI, STL). 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	290° at 15 kt	+11 kt		109 kt	5 h 20 min	12:26 pm CDT (17:26 UTC)
6,500 ft	300° at 14 kt	+8 kt	13 °C	112 kt	5 h 11 min	12:17 pm CDT (17:17 UTC)
8,500 ft	300° at 14 kt	+8 kt	10 °C	112 kt	5 h 11 min	12:17 pm CDT (17:17 UTC)
10,500 ft	300° at 16 kt	+10 kt	6 °C	110 kt	5 h 17 min	12:23 pm CDT (17:23 UTC)
12,500 ft	300° at 19 kt	+12 kt	2 °C	108 kt	5 h 23 min	12:29 pm CDT (17:29 UTC)
14,500 ft	300° at 22 kt	+12 kt	-1 °C	108 kt	5 h 23 min	12:29 pm CDT (17:29 UTC)
16,500 ft	300° at 24 kt	+13 kt	-5 °C	107 kt	5 h 26 min	12:32 pm CDT (17:32 UTC)
18,000 ft FL180	300° at 27 kt	+13 kt	-8 °C	107 kt	5 h 26 min	12:32 pm CDT (17:32 UTC)
24,000 ft FL240	300° at 29 kt	+16 kt	-20 °C	104 kt	5 h 35 min	12:41 pm CDT (17:41 UTC)
30,000 ft FL300	300° at 39 kt	+20 kt	-35 °C	100 kt	5 h 49 min	12:55 pm CDT (17:55 UTC)
34,000 ft FL340	310° at 52 kt	+24 kt	-43 °C	96 kt	6 h 03 min	1:09 pm CDT (18:09 UTC)
39,000 ft FL390	310° at 61 kt	+24 kt	-51 °C	96 kt	6 h 03 min	1:09 pm CDT (18:09 UTC)

Based on data from the 12th at 06:00 UTC; valid on the 12th at 12:00 UTC for use 08:00 to 15:00 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
BUF	used from 0 nm out; 25 nm from the line	300/11	330/15 11°	340/26 8°	330/28 2°	340/31 -10°	340/32 -21°	340/52 -37°	340/59 -46°	330/66 -53°
CLE	used from 99 nm out; 49 nm from the line	310/7	350/20 14°	340/16 9°	320/21 2°	320/32 -8°	330/34 -20°	330/45 -36°	320/60 -45°	320/64 -51°
FWA	used from 246 nm out; 43 nm from the line	270/20	300/16 15°	290/14 10°	280/17 3°	290/25 -7°	280/30 -19°	280/34 -35°	290/48 -44°	300/64 -52°
IND	used from 345 nm out; 35 nm from the line	270/22	290/19 15°	270/19 8°	270/18 4°	290/28 -7°	280/35 -20°	270/37 -34°	300/51 -42°	300/61 -51°
SPI	used from 443 nm out; 78 nm from the line	260/28	250/22 15°	250/14 9°	260/20 6°	280/27 -7°	280/34 -19°	280/48 -32°	280/59 -41°	300/60 -49°
STL	used from 542 nm out; 27 nm from the line	250/26	240/21 15°	240/22 11°	250/23 6°	270/28 -7°	260/30 -19°	280/52 -31°	280/57 -40°	300/57 -49°

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
BUF Buffalo, NY	departure	IFR Sky: a broken layer at 600 feet, overcast at 1,600 feet Weather: mist	from the west-southwest (240°) at 5 knots	4 mi	600 ft	726 ft	7:54 am EDT (11:54 UTC)
DKK Dunkirk, NY	30 nm out, 16 nm south of the line	marginal VFR Sky: scattered clouds at 1,000 feet, overcast at 1,600 feet	from the west (270°) at 8 knots	7 mi	1,600 ft	692 ft	11:53 UTC
ERI Erie, PA	79 nm out, 22 nm southeast 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
BKL Cleveland, OH	158 nm out, 25 nm southeast of the line, tower	marginal VFR Sky: a broken layer at 1,200 feet, overcast at 1,800 feet	from the west-southwest (240°) at 7 knots	10+ mi	1,200 ft	583 ft	11:53 UTC
PCW Port Clinton, OH	207 nm out, 5 nm east of the line	IFR Sky: overcast at 800 feet	from the southwest (220°) at 7 knots	10+ mi	800 ft	590 ft	11:55 UTC
TOL Toledo, OH	236 nm out, 21 nm northwest of the line, tower	low IFR Sky: overcast at 300 feet Weather: mist	from the south-southwest (210°) at 6 knots	1 mi	300 ft	683 ft	11:52 UTC
FWA Fort Wayne, IN	315 nm out, 17 nm north of the line, tower	marginal VFR Sky: a broken layer at 25,000 feet Weather: mist	from the south-southeast (160°) at 5 knots	3 mi	25,000 ft	814 ft	11:54 UTC
GUS Peru, IN	355 nm out, 19 nm northwest of the line, tower	VFR	from the south (170°) at 4 knots	10+ mi	none	810 ft	11:55 UTC
HUF Terre Haute, IN	443 nm out, 20 nm southeast of the line, tower	VFR	calm	9 mi	none	589 ft	11:53 UTC
MTO Mattoon/Charleston, IL	483 nm out, 6 nm north of the line	VFR	from the south-southwest (210°) at 8 knots	10+ mi	none	722 ft	11:53 UTC
VLA Vandalia, IL	532 nm out, 4 nm east of the line	no report just now				537 ft
CPS Cahokia/St Louis, IL	destination	VFR	from the south-southeast (160°) at 3 knots	10+ mi	none	412 ft	6:53 am CDT (11:53 UTC)

The highest airport on this list sits at 814 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At CPS when you get there the forecast at the estimated arrival, 12:17 pm CDT (17:17 UTC)

Wind from the southwest at 7 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for CPS

From Mon 7:00 am CDT (12:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 25,000 feet
From Mon 10:00 am CDT (15:00 UTC): wind from the southwest at 7 knots, visibility more than 6 miles, clear skies

The forecast for BUF, the departure

From Mon 8:00 am EDT (12:00 UTC): wind from the southwest at 4 knots, visibility more than 6 miles, scattered clouds at 700 feet, overcast at 1,500 feet
From Mon 11:00 am EDT (15:00 UTC): wind from the west-southwest at 6 knots, visibility more than 6 miles, overcast at 1,200 feet
From Mon 2:00 pm EDT (18:00 UTC): wind from the west-southwest at 10 knots, gusting to 18, visibility more than 6 miles, a broken layer at 3,000 feet
From Mon 7:00 pm EDT (23:00 UTC): wind from the southwest at 8 knots, visibility more than 6 miles, a broken layer at 20,000 feet
From Mon 9:00 pm EDT (01:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, low-level wind shear, scattered clouds at 20,000 feet
From Tue 5:00 am EDT (09:00 UTC): wind from the southwest at 8 knots, visibility more than 6 miles, scattered clouds at 9,000 feet
30% chance between Tue 6:00 am EDT (10:00 UTC) and 8:00 am EDT (12:00 UTC): visibility 4 miles, light rain showers, a broken layer at 7,000 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 BUF 6:37 pm EDT (22:37 UTC), at CPS 6:27 pm CDT (23:27 UTC) (civil twilight ends 6:53 pm CDT (23:53 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 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: Buffalo Niagara International, St. Louis Downtown Airport.