St. Louis Lambert International to Portland International STL → PDX
1,481 nautical miles (1,704 statute miles) northwest on a straight line, true course 297°, about 298° magnetic at the departure end (variation 1W). At 120 knots that is 13 h 21 min at the quickest height in today's winds (8,500 ft, a 9-knot headwind), arriving about 4:05 pm PDT (23:05 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: 226 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 TANGO 2W: 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 70 to 556 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 477 to 1182 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 656 to 805 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Over the route from 696 to 715 nm out.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 ft. Over the route from 755 to 765 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 815 to 1093 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 825 to 1322 nm out.
- AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 1093 to 1332 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 378 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
Not fetched just now.
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 14 forecast points nearest it (STL, COU, MKC, OMA, GRI, ONL, BFF, RAP, LND, DLN, BOI, LWS, YKM, PDX). 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 | 250° at 21 kt | +16 kt | 18 °C | 104 kt | 14 h 14 min | 4:58 pm PDT (23:58 UTC) |
| 6,500 ft | 260° at 18 kt | +14 kt | 11 °C | 106 kt | 13 h 58 min | 4:42 pm PDT (23:42 UTC) |
| 8,500 ft | 240° at 14 kt | +9 kt | 5 °C | 111 kt | 13 h 21 min | 4:05 pm PDT (23:05 UTC) |
| 10,500 ft | 240° at 15 kt | +9 kt | 3 °C | 111 kt | 13 h 21 min | 4:05 pm PDT (23:05 UTC) |
| 12,500 ft | 230° at 17 kt | +10 kt | -1 °C | 110 kt | 13 h 28 min | 4:12 pm PDT (23:12 UTC) |
| 14,500 ft | 230° at 18 kt | +9 kt | -5 °C | 111 kt | 13 h 21 min | 4:05 pm PDT (23:05 UTC) |
| 16,500 ft | 230° at 18 kt | +9 kt | -10 °C | 111 kt | 13 h 21 min | 4:05 pm PDT (23:05 UTC) |
| 18,000 ft FL180 | 230° at 19 kt | +9 kt | -13 °C | 111 kt | 13 h 21 min | 4:05 pm PDT (23:05 UTC) |
| 24,000 ft FL240 | 230° at 30 kt | +15 kt | -24 °C | 105 kt | 14 h 06 min | 4:50 pm PDT (23:50 UTC) |
| 30,000 ft FL300 | 250° at 37 kt | +27 kt | -33 °C | 93 kt | 15 h 55 min | 6:39 pm PDT (01:39 UTC) |
| 34,000 ft FL340 | 250° at 42 kt | +31 kt | -37 °C | 89 kt | 16 h 38 min | 7:22 pm PDT (02:22 UTC) |
| 39,000 ft FL390 | 250° at 42 kt | +33 kt | -45 °C | 87 kt | 17 h 01 min | 7:45 pm PDT (02:45 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| STL | used from 0 nm out; 25 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° |
| COU | used from 50 nm out; 34 nm from the line | 250/36 | 260/14 16° | 250/5 12° | 260/12 6° | 260/24 -7° | 260/35 -19° | 280/58 -31° | 280/62 -40° | 290/60 -49° |
| MKC | used from 149 nm out; 65 nm from the line | 240/49 | 240/21 20° | 220/19 13° | 230/21 6° | 260/26 -7° | 250/37 -19° | 270/66 -31° | 270/65 -38° | 280/60 -48° |
| OMA | used from 248 nm out; 39 nm from the line | 230/47 | 240/33 21° | 230/22 13° | 220/27 5° | 240/35 -8° | 250/43 -21° | 260/47 -33° | 260/59 -36° | 270/58 -46° |
| GRI | used from 348 nm out; 31 nm from the line | 230/39 23° | 230/32 15° | 210/29 7° | 230/31 -8° | 230/43 -21° | 250/52 -31° | 260/59 -35° | 260/59 -46° | |
| ONL | used from 447 nm out; 62 nm from the line | 250/31 22° | 230/27 16° | 220/25 8° | 230/25 -9° | 220/29 -22° | 250/42 -33° | 250/48 -36° | 250/52 -46° | |
| BFF | used from 547 nm out; 82 nm from the line | 280/28 | 260/39 11° | 240/34 5° | 210/38 -11° | 210/52 -22° | 230/61 -31° | 230/61 -36° | 240/56 -45° | |
| RAP | used from 696 nm out; 104 nm from the line | 250/28 16° | 260/31 10° | 240/25 4° | 210/35 -10° | 200/45 -23° | 230/47 -31° | 230/47 -36° | 230/51 -46° | |
| LND | used from 745 nm out; 115 nm from the line | 240/10 3° | 240/30 0° | 220/42 -13° | 230/52 -23° | 220/54 -33° | 220/52 -36° | 220/53 -44° | ||
| DLN | used from 944 nm out; 99 nm from the line | 190/10 -4° | 220/23 -4° | 210/21 -18° | 210/43 -28° | 210/60 -33° | 210/72 -37° | 210/67 -44° | ||
| BOI | used from 1143 nm out; 92 nm from the line | 320/11 1° | 280/8 -5° | 220/14 -11° | 200/60 -19° | 190/66 -31° | 210/46 -32° | 220/50 -33° | 220/43 -39° | |
| LWS | used from 1192 nm out; 83 nm from the line | L/V | 340/5 -3° | L/V -6° | 040/7 -10° | 100/23 -22° | 180/30 -31° | 190/11 -34° | 200/11 -36° | 220/23 -40° |
| YKM | used from 1341 nm out; 75 nm from the line | 360/6 | 360/11 -1° | 030/20 -7° | 040/21 -11° | 020/55 -18° | 010/84 -26° | 010/79 -40° | 010/45 -42° | 350/23 -42° |
| PDX | used from 1391 nm out; 65 nm from the line | L/V | 340/8 0° | 360/12 -6° | 010/30 -7° | 360/62 -15° | 360/67 -26° | 360/68 -40° | 350/61 -48° | 340/26 -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 |
|---|---|---|---|---|---|---|---|
| STL St Louis, MO | departure | no report just now | 617 ft | ||||
| MBY Moberly, MO | 109 nm out, 5 nm southeast of the line | no report just now | 866 ft | ||||
| EVU Maryville, MO | 229 nm out, 4 nm west of the line | no report just now | 1,145 ft | ||||
| LNK Lincoln, NE | 318 nm out, 8 nm southwest of the line, tower | no report just now | 1,218 ft | ||||
| TIF Thedford, NE | 507 nm out, 8 nm south of the line | no report just now | 2,925 ft | ||||
| CDR Chadron, NE | 626 nm out, 6 nm north of the line | no report just now | 3,297 ft | ||||
| HSG Thermopolis, WY | 864 nm out, 9 nm south of the line | no report just now | 4,891 ft | ||||
| WYS West Yellowstone, MT | 994 nm out, 20 nm north of the line | no report just now | 6,649 ft | ||||
| LLJ Challis, ID | 1123 nm out, 17 nm south of the line | no report just now | 5,075 ft | ||||
| PDT Pendleton, OR | 1322 nm out, 23 nm north of the line, tower | no report just now | 1,494 ft | ||||
| DLS The Dalles, OR | 1421 nm out, 7 nm north of the line | no report just now | 246 ft | ||||
| PDX Portland, OR | destination | no report just now | 30 ft |
The highest airport on this list sits at 6,649 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At PDX when you get there the forecast at the estimated arrival, 4:05 pm PDT (23:05 UTC)
PDX has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/7634 CENTRALIA, MO, Monday, October 12, 2026 UTC 15 nm from the route, 89 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZKC
Daylight
Sunset at STL 6:27 pm CDT (23:27 UTC), at PDX 6:28 pm PDT (01:28 UTC) (civil twilight ends 6:58 pm PDT (01:58 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
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, Portland International.