Plan a flight · Mon 9:00 am PDT (16:00 UTC)

Portland International to Buffalo Niagara International PDX → BUF

1,869 nautical miles (2,151 statute miles) east on a straight line, true course 079°, about 063° magnetic at the departure end (variation 16E). At 120 knots that is 11 h 28 min at the quickest height in today's winds (39,000 ft, a 43-knot tailwind), arriving about 11:28 pm EDT (03:28 UTC), after sunset at the destination. Right now PDX is IFR, wind from the south-southwest (200°) at 3 knots; BUF is marginal VFR, wind from the west-southwest (240°) at 17 knots, gusting to 24. 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 C24C: thunderstorms (a convective SIGMET) up to 37,000 ft, moving from the southwest at 40 knots, until 10:55 am PDT (17:55 UTC). Over the route from 900 to 1040 nm out.
as issued
```
WSUS32 KKCI 121555
MKCC WST 121555
CONVECTIVE SIGMET 24C
VALID UNTIL 1755Z
SD ND
FROM GFK-FAR-PIR-DPR-50SE MOT-GFK
INTSF AREA TS MOV FROM 21040KT. TOPS TO FL370.
```
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 440 nm of the route.
AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 140 to 700 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 170 to 590 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 390 to 1279 nm out.
AIRMET ZULU 2C: moderate icing up to 22,000 ft. Over the route from 700 to 1010 nm out.
AIRMET SIERRA 1E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, mist). Over the last 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 PDX.

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

E75L at 400 ft, 0 nm west, 8:31 am PDT (15:31 UTC): overcast above 40,000 ft. At the departure end, 0 nm west of the line.
as filed, and in English
```
PDX UA /OV KPDX/TM 1531/FL004/TP E75L/SK OVC004
```
Report
a routine report filed through PDX
Where
over KPDX
Time
15:31 UTC
Height
at 400 ft
Aircraft
E75L
Sky
overcast from 400 ft
C25B at 11,000 ft, 29 nm north, 7:13 am PDT (14:13 UTC): a routine report with nothing remarked on. 360 nm along the route, 29 nm north of the line.
as filed, and in English
```
MSO UA /OV MSO/TM 1413/FL110/TP C25B/SK TOP 110
```
Report
a routine report filed through MSO
Where
over MSO
Time
14:13 UTC
Height
at 11,000 ft
Aircraft
C25B
Sky
top 11,000 ft
GLF4 descending, 47 nm south, 6:48 am PDT (13:48 UTC): a routine report with nothing remarked on. 480 nm along the route, 47 nm south of the line.
as filed, and in English
```
BZN UA /OV BZN/TM 1348/FLDURD/TP GLF4/SK 047
```
Report
a routine report filed through BZN
Where
over BZN
Time
13:48 UTC
Height
during the descent
Aircraft
GLF4
Sky
at 4,700 ft
CL35 at 45,000 ft, 5 nm southeast, 8:42 am PDT (15:42 UTC): light chop turbulence. 580 nm along the route, 5 nm southeast of the line.
as filed, and in English
```
BIL UA /OV BIL345045/TM 1542/FL450/TP CL35/TB CONS LGT CHOP /ZLC
```
Report
a routine report filed through BIL
Where
45 nm north (345°) of BIL
Time
15:42 UTC
Height
at 45,000 ft
Aircraft
CL35
Turbulence
continuous light chop zlc
CL35 at 43,000 ft, 37 nm south, 8:53 am PDT (15:53 UTC): no chop turbulence. 690 nm along the route, 37 nm south of the line.
as filed, and in English
```
MLS UA /OV MLS195024/TM 1553/FL430/TP CL35/TB NEG CHOP /ZLC
```
Report
a routine report filed through MLS
Where
24 nm south (195°) of MLS
Time
15:53 UTC
Height
at 43,000 ft
Aircraft
CL35
Turbulence
no chop zlc
CL35 at 3,000 ft, 19 nm north, 8:07 am PDT (15:07 UTC): no icing. 820 nm along the route, 19 nm north of the line.
as filed, and in English
```
DIK UA /OV DIK/TM 1507/FL030/TP CL35/SK BASE030/IC NEG
```
Report
a routine report filed through DIK
Where
over DIK
Time
15:07 UTC
Height
at 3,000 ft
Aircraft
CL35
Sky
BASE030
Icing
none
C414 at 8,000 ft, 16 nm north, 7:19 am PDT (14:19 UTC): no icing, 7 °C. 840 nm along the route, 16 nm north of the line.
as filed, and in English
```
DIK UA /OV DIK090020/TM 1419/FL080/TP C414/SK TOP080/TA 07/IC NEG
```
Report
a routine report filed through DIK
Where
20 nm east (090°) of DIK
Time
14:19 UTC
Height
at 8,000 ft
Aircraft
C414
Sky
TOP080
Temperature
7 °C
Icing
none
C525 at 3,500 ft, 19 nm north, 6:43 am PDT (13:43 UTC): a trace of rime icing, 3 °C, remarks: during the descent. 910 nm along the route, 19 nm north of the line.
as filed, and in English
```
BIS UA /OV BIS/TM 1343/FL035/TP C525/SK BASES 020 TOPS 055/TA 03/IC TR RIME/RM DURD
```
Report
a routine report filed through BIS
Where
over BIS
Time
13:43 UTC
Height
at 3,500 ft
Aircraft
C525
Sky
bases 2,000 ft tops 5,500 ft
Temperature
3 °C
Icing
tr rime
Remarks
during the descent
SR22 at 7,000 ft, 12 nm south, 6:37 am PDT (13:37 UTC): no turbulence, no icing, clear from 7,000 ft to 60,000 ft. 910 nm along the route, 12 nm south of the line.
as filed, and in English
```
BIS UA /OV BIS170030/TM 1337/FL070/TP SR22/SK SKC/TB NEG/IC NEG
```
Report
a routine report filed through BIS
Where
30 nm south (170°) of BIS
Time
13:37 UTC
Height
at 7,000 ft
Aircraft
SR22
Sky
clear
Turbulence
none
Icing
none
PA46 at 7,000 ft, 19 nm north, 6:11 am PDT (13:11 UTC): remarks: during the climb. 910 nm along the route, 19 nm north of the line.
as filed, and in English
```
BIS UA /OV BIS/TM 1311/FL070/TP PA46/SK TOPS 062/RM DURC
```
Report
a routine report filed through BIS
Where
over BIS
Time
13:11 UTC
Height
at 7,000 ft
Aircraft
PA46
Sky
tops 6,200 ft
Remarks
during the climb
C414 at 9,000 ft, 12 nm south, 7:48 am PDT (14:48 UTC): no turbulence, no icing, 13 °C. 930 nm along the route, 12 nm south of the line.
as filed, and in English
```
7L2 UA /OV 7L2/TM 1448/FL090/TP C414/SK BASE100/TA 13/TB NEG/IC NEG
```
Report
a routine report filed through 7L2
Where
over 7L2
Time
14:48 UTC
Height
at 9,000 ft
Aircraft
C414
Sky
BASE100
Temperature
13 °C
Turbulence
none
Icing
none
A320 at 34,000 ft, 4 nm west, 8:10 am PDT (15:10 UTC): no turbulence. 940 nm along the route, 4 nm west of the line.
as filed, and in English
```
BIS UA /OV BIS120030/TM 1510/FL340/TP A320/SK TOP320/TB NEG
```
Report
a routine report filed through BIS
Where
30 nm southeast (120°) of BIS
Time
15:10 UTC
Height
at 34,000 ft
Aircraft
A320
Sky
TOP320
Turbulence
none
A21N at 34,000 ft, 11 nm south, 7:34 am PDT (14:34 UTC): a routine report with nothing remarked on. 940 nm along the route, 11 nm south of the line.
as filed, and in English
```
BIS UA /OV BIS130040/TM 1434/FL340/TP A21N/SK TOP360
```
Report
a routine report filed through BIS
Where
40 nm southeast (130°) of BIS
Time
14:34 UTC
Height
at 34,000 ft
Aircraft
A21N
Sky
TOP360
C550 at 4,000 ft, 40 nm north, 8:18 am PDT (15:18 UTC): a routine report with nothing remarked on. 1020 nm along the route, 40 nm north of the line.
as filed, and in English
```
BAC UA /OV BAC/TM 1518/FL040/TP C550/SK BASE017
```
Report
a routine report filed through BAC
Where
over BAC
Time
15:18 UTC
Height
at 4,000 ft
Aircraft
C550
Sky
BASE017

16 more routine reports are on the map.

Winds aloft along the route, and the time en route the forecast for use 14:00–21:00 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 16 forecast points nearest it (PDX, YKM, LWS, DLN, GTF, BIL, MLS, DIK, ABR, AXN, MSP, LSE, GRB, TVC, CLE, BUF). 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	250° at 6 kt	−5 kt		125 kt	14 h 57 min	2:57 am EDT (06:57 UTC)
5,500 ft	260° at 9 kt	−8 kt	0 °C	128 kt	14 h 36 min	2:36 am EDT (06:36 UTC)
7,500 ft	260° at 12 kt	−10 kt	7 °C	130 kt	14 h 23 min	2:23 am EDT (06:23 UTC)
9,500 ft	260° at 14 kt	−12 kt	4 °C	132 kt	14 h 10 min	2:10 am EDT (06:10 UTC)
11,500 ft	260° at 14 kt	−13 kt	1 °C	133 kt	14 h 03 min	2:03 am EDT (06:03 UTC)
13,500 ft	260° at 15 kt	−14 kt	-3 °C	134 kt	13 h 57 min	1:57 am EDT (05:57 UTC)
15,500 ft	260° at 16 kt	−15 kt	-8 °C	135 kt	13 h 51 min	1:51 am EDT (05:51 UTC)
17,500 ft	260° at 17 kt	−16 kt	-12 °C	136 kt	13 h 45 min	1:45 am EDT (05:45 UTC)
18,000 ft FL180	260° at 17 kt	−16 kt	-13 °C	136 kt	13 h 45 min	1:45 am EDT (05:45 UTC)
24,000 ft FL240	250° at 22 kt	−20 kt	-25 °C	140 kt	13 h 21 min	1:21 am EDT (05:21 UTC)
30,000 ft FL300	250° at 29 kt	−27 kt	-36 °C	147 kt	12 h 43 min	12:43 am EDT (04:43 UTC)
34,000 ft FL340	260° at 34 kt	−33 kt	-40 °C	153 kt	12 h 13 min	12:13 am EDT (04:13 UTC)
39,000 ft FL390	260° at 42 kt	−43 kt	-45 °C	163 kt	11 h 28 min	11:28 pm EDT (03:28 UTC)

Based on data from the 12th at 12:00 UTC; valid on the 12th at 18:00 UTC for use 14:00 to 21:00 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
PDX	used from 0 nm out; 25 nm from the line	L/V	L/V 1°	030/14 -4°	020/32 -5°	010/54 -14°	360/65 -26°	360/71 -41°	360/65 -47°	350/39 -46°
YKM	used from 50 nm out; 47 nm from the line	L/V	350/9 0°	040/20 -5°	030/23 -8°	020/41 -18°	010/74 -27°	010/73 -40°	020/54 -44°	350/9 -43°
LWS	used from 150 nm out; 63 nm from the line	L/V	L/V -2°	030/6 -5°	050/10 -10°	110/19 -21°	150/22 -31°	130/11 -36°	200/6 -37°	220/21 -40°
DLN	used from 350 nm out; 86 nm from the line			L/V -3°	170/16 -6°	180/21 -18°	190/27 -30°	210/63 -33°	210/62 -36°	210/51 -42°
GTF	used from 400 nm out; 74 nm from the line		L/V	L/V -4°	230/12 -3°	210/12 -17°	190/23 -29°	200/48 -39°	210/69 -39°	220/66 -42°
BIL	used from 550 nm out; 50 nm from the line		L/V	250/11 -1°	240/20 -2°	230/28 -15°	220/28 -28°	220/53 -34°	220/55 -39°	220/63 -44°
MLS	used from 650 nm out; 25 nm from the line		320/9 -2°	270/14 0°	260/22 -1°	220/30 -14°	210/43 -26°	230/53 -34°	230/54 -38°	230/59 -44°
DIK	used from 750 nm out; 51 nm from the line		330/11 1°	230/20 4°	220/22 0°	230/29 -12°	240/27 -25°	240/40 -34°	230/49 -37°	240/55 -44°
ABR	used from 900 nm out; 101 nm from the line	020/9	230/5 12°	190/14 11°	200/25 5°	230/37 -11°	230/50 -23°	240/39 -34°	240/49 -38°	240/55 -46°
AXN	used from 1050 nm out; 61 nm from the line	110/18	200/12 17°	220/22 12°	230/26 4°	240/31 -10°	240/45 -21°	240/38 -36°	250/49 -38°	260/56 -47°
MSP	used from 1199 nm out; 53 nm from the line	140/8	210/22 19°	230/31 13°	240/31 5°	240/29 -9°	250/34 -21°	250/38 -36°	260/46 -38°	270/55 -47°
LSE	used from 1299 nm out; 96 nm from the line	240/16	230/27 20°	250/35 12°	260/28 5°	260/30 -9°	260/37 -21°	260/38 -36°	280/44 -37°	280/52 -47°
GRB	used from 1349 nm out; 84 nm from the line	260/10	240/27 16°	260/31 10°	270/25 5°	280/31 -10°	280/35 -22°	270/46 -37°	290/43 -40°	300/64 -48°
TVC	used from 1499 nm out; 32 nm from the line	260/18	250/30 15°	260/34 8°	280/29 5°	280/36 -10°	280/37 -22°	270/50 -37°	290/46 -42°	300/60 -49°
CLE	used from 1699 nm out; 140 nm from the line	280/17	270/17 14°	280/22 10°	290/26 4°	290/25 -8°	280/31 -21°	280/35 -36°	280/43 -44°	300/53 -48°
BUF	used from 1749 nm out; 95 nm from the line	270/25	300/28 14°	300/29 8°	310/29 2°	300/30 -9°	290/33 -21°	290/44 -37°	290/56 -47°	300/62 -51°

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
PDX Portland, OR	departure	IFR Sky: scattered clouds at 300 feet, overcast at 500 feet Weather: mist	from the south-southwest (200°) at 3 knots	5 mi	500 ft	30 ft	8:53 am PDT (15:53 UTC)
ALW Walla Walla, WA	180 nm out, 3 nm east of the line, tower	VFR Sky: a broken layer at 9,500 feet	from the south-southwest (210°) at 5 knots	10+ mi	9,500 ft	1,194 ft	15:53 UTC
LWS Lewiston, ID	240 nm out, 10 nm north of the line, tower	VFR Sky: overcast at 5,500 feet	from the south-southeast (150°) at 3 knots	10+ mi	5,500 ft	1,442 ft	15:56 UTC
HLN Helena, MT	450 nm out, 6 nm northwest of the line, tower	marginal VFR Sky: a broken layer at 1,800 feet	from the west (270°) at 6 knots	10+ mi	1,800 ft	3,877 ft	15:53 UTC
RPX Roundup, MT	590 nm out, 9 nm south of the line	no report just now				3,490 ft
BIS Bismarck, ND	910 nm out, 19 nm north of the line, tower	IFR Sky: a broken layer at 700 feet, overcast at 1,600 feet	from the north (010°) at 4 knots	9 mi	700 ft	1,661 ft	15:52 UTC
GWR Gwinner, ND	1040 nm out, 1 nm southwest of the line	reported, no category	from the northeast (040°) at 11 knots	2.5 mi	none	1,265 ft	15:55 UTC
STC St Cloud, MN	1189 nm out, 20 nm south of the line, tower	marginal VFR Sky: overcast at 1,100 feet	from the east-northeast (070°) at 7 knots, gusting to 18	10+ mi	1,100 ft	1,030 ft	15:53 UTC
RCX Ladysmith, WI	1319 nm out, 2 nm northeast of the line	VFR	from the north-northeast (020°) at 6 knots	7 mi	none	1,239 ft	15:35 UTC
TVC Traverse City, MI	1549 nm out, 12 nm northeast of the line, tower	VFR Sky: a broken layer at 19,000 feet	from the south (180°) at 7 knots	10+ mi	19,000 ft	623 ft	15:53 UTC
CYSN St Catharines,	1849 nm out, 8 nm north of the line	marginal VFR Sky: overcast at 1,400 feet	from the southwest (230°) at 13 knots, gusting to 18	15 mi	1,400 ft	321 ft	15:00 UTC
BUF Buffalo, NY	destination	marginal VFR Sky: a broken layer at 1,000 feet	from the west-southwest (240°) at 17 knots, gusting to 24	10+ mi	1,000 ft	726 ft	11:54 am EDT (15:54 UTC)

The highest airport on this list sits at 3,877 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At BUF when you get there the forecast at the estimated arrival, 11:28 pm EDT (03:28 UTC)

Wind from the south-southwest at 6 knots, visibility more than 6 miles, low-level wind shear, scattered clouds at 20,000 feet VFR

The whole forecast for BUF

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

The forecast for PDX, the departure

From Mon 7:00 am PDT (14:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
At times between Mon 7:00 am PDT (14:00 UTC) and 10:00 am PDT (17:00 UTC): a broken layer at 800 feet

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

6/8927 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local on the route, 360 nm along the route · a VIP movement · starts Wednesday 14 October · ZSE
6/8923 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local on the route, 360 nm along the route · a VIP movement · starts Wednesday 14 October · ZLC

Daylight

Sunset at PDX 6:28 pm PDT (01:28 UTC), at BUF 6:37 pm EDT (22:37 UTC) (civil twilight ends 7:06 pm EDT (23:06 UTC)). At 120 knots the arrival at BUF is before sunrise there (7:25 am EDT (11:25 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 Northwest · loop National Weather Service

Radar now, the northern Rockies · 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: Portland International, Buffalo Niagara International.