General Edward Lawrence Logan International to St. Louis Downtown Airport BOS → CPS
902 nautical miles (1,038 statute miles) west on a straight line, true course 262°, about 277° magnetic at the departure end (variation 15W). At 120 knots that is 7 h 47 min at the quickest height in today's winds (4,500 ft, a 4-knot headwind), arriving about 9:50 am CDT (14:50 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: 2 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 763 nm of the route.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the first 337 nm of the route.
- AIRMET TANGO 2W: moderate turbulence below 18,000 ft up to 10,000 ft. Over the first 79 nm of the route.
- AIRMET ZULU 1C: moderate icing up to 22,000 ft. Near the route, 40 nm along the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 129 to 406 nm out.
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 BOS.
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 02:00–09:00 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 12 forecast points nearest it (BOS, BDL, ALB, AVP, PSB, AGC, CLE, CMH, CVG, 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 | 310° at 9 kt | +4 kt | 13 °C | 116 kt | 7 h 47 min | 9:50 am CDT (14:50 UTC) |
| 6,500 ft | 310° at 14 kt | +7 kt | 13 °C | 113 kt | 7 h 59 min | 10:02 am CDT (15:02 UTC) |
| 8,500 ft | 310° at 16 kt | +10 kt | 9 °C | 110 kt | 8 h 12 min | 10:15 am CDT (15:15 UTC) |
| 10,500 ft | 300° at 15 kt | +10 kt | 6 °C | 110 kt | 8 h 12 min | 10:15 am CDT (15:15 UTC) |
| 12,500 ft | 300° at 15 kt | +11 kt | 3 °C | 109 kt | 8 h 17 min | 10:20 am CDT (15:20 UTC) |
| 14,500 ft | 290° at 18 kt | +14 kt | -2 °C | 106 kt | 8 h 31 min | 10:34 am CDT (15:34 UTC) |
| 16,500 ft | 290° at 20 kt | +16 kt | -6 °C | 104 kt | 8 h 40 min | 10:43 am CDT (15:43 UTC) |
| 18,000 ft FL180 | 290° at 22 kt | +18 kt | -9 °C | 102 kt | 8 h 51 min | 10:54 am CDT (15:54 UTC) |
| 24,000 ft FL240 | 290° at 25 kt | +21 kt | -21 °C | 99 kt | 9 h 07 min | 11:10 am CDT (16:10 UTC) |
| 30,000 ft FL300 | 290° at 34 kt | +27 kt | -35 °C | 93 kt | 9 h 42 min | 11:45 am CDT (16:45 UTC) |
| 34,000 ft FL340 | 280° at 45 kt | +39 kt | -42 °C | 81 kt | 11 h 08 min | 1:11 pm CDT (18:11 UTC) |
| 39,000 ft FL390 | 280° at 43 kt | +37 kt | -49 °C | 83 kt | 10 h 52 min | 12:55 pm CDT (17:55 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| BOS | used from 0 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° |
| BDL | used from 50 nm out; 14 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° |
| ALB | used from 99 nm out; 43 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° |
| AVP | used from 149 nm out; 51 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° |
| PSB | used from 297 nm out; 30 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° | |
| AGC | used from 396 nm out; 40 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° |
| CLE | used from 446 nm out; 46 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° |
| CMH | used from 495 nm out; 43 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° |
| CVG | used from 595 nm out; 64 nm from the line | 320/18 | 350/32 16° | 350/35 10° | 350/30 3° | 330/30 -7° | 340/44 -20° | 340/58 -35° | 330/72 -41° | 320/36 -49° |
| IND | used from 644 nm out; 41 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° |
| SPI | used from 793 nm out; 74 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° |
| STL | used from 842 nm out; 43 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° |
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 |
|---|---|---|---|---|---|---|---|
| BOS Boston, MA | departure | no report just now | 19 ft | ||||
| CEF Springfield/Chicopee, MA | 69 nm out, 1 nm northeast of the line, tower | no report just now | 241 ft | ||||
| POU Poughkeepsie, NY | 139 nm out, 24 nm south of the line, tower | no report just now | 163 ft | ||||
| IPT Williamsport, PA | 268 nm out, 20 nm south of the line, tower | no report just now | 528 ft | ||||
| DUJ Dubois, PA | 357 nm out, 5 nm southwest of the line | no report just now | 1,816 ft | ||||
| BVI Beaver Falls, PA | 436 nm out, 11 nm southeast of the line, tower | no report just now | 1,252 ft | ||||
| CAK Akron, OH | 476 nm out, 10 nm north of the line, tower | no report just now | 1,225 ft | ||||
| DAY Dayton, OH | 614 nm out, 13 nm south of the line, tower | no report just now | 1,009 ft | ||||
| IND Indianapolis, IN | 713 nm out, 6 nm north of the line, tower | no report just now | 796 ft | ||||
| HUF Terre Haute, IN | 763 nm out, 6 nm northeast of the line, tower | no report just now | 589 ft | ||||
| GRE Greenville, IL | 862 nm out, 2 nm north of the line | no report just now | 540 ft | ||||
| CPS Cahokia/St Louis, IL | destination | no report just now | 412 ft |
The highest airport on this list sits at 1,816 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, 9:50 am CDT (14:50 UTC)
CPS has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/8802 Foxborough, MA, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 14 nm from the route, at the departure end · drones kept away from a public gathering · starts Saturday 17 October · ZBW
- 6/7153 North Sicuate, RI, Saturday, October 10, 2026 through Monday, October 12, 2026 UTC 24 nm from the route, at the departure end · drones kept away from a public gathering · until 12 October · ZBW
- 6/8587 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local on the route, 416 nm along the route · a VIP movement · today · ZOB
- 6/8888 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 20 nm from the route, 436 nm along the route · security · today · ZOB
- 6/8829 Youngstown, OH, Monday, October 12, 2026 through Monday, October 12, 2026 Local 4 nm from the route, 436 nm along the route · a VIP movement · today · ZOB
Daylight
Sunset at BOS 6:07 pm EDT (22:07 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
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: General Edward Lawrence Logan International, St. Louis Downtown Airport.