St. Louis Lambert International to Baltimore/Washington International Thurgood Marshall STL → BWI
640 nautical miles (736 statute miles) east on a straight line, true course 083°, about 084° magnetic at the departure end (variation 1W). At 120 knots that is 4 h 06 min at the quickest height in today's winds (34,000 ft, a 36-knot tailwind), arriving about 3:34 am EDT (07:34 UTC), after sunset at the destination. 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: 2,745 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 E11E: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 20 knots, until 11:55 pm CDT (04:55 UTC). Over the last 120 nm of the route.
as issued
WSUS31 KKCI 120255 MKCE WST 120255 CONVECTIVE SIGMET 11E VALID UNTIL 0455Z NY NJ PA DE MD VA DC WV AND DE NJ NY MD CT VA CSTL WTRS FROM 20NE JFK-90SE SIE-20NNW ORF-30ENE EKN-10S JST-20NE JFK AREA EMBD TS MOV FROM 24020KT. TOPS TO FL340.
- 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 500 nm of the route.
- AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 410 to 580 nm out.
- AIRMET TANGO 3W: moderate turbulence above 18,000 ft from 21,000 ft to 33,000 ft. Over the last 180 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
- B38M at 29,000 ft, 36 nm north, 7:55 pm CDT (00:55 UTC): moderate turbulence above 29,000 ft, remarks: zob. 470 nm along the route, 36 nm north of the line.
as filed, and in English
MPG UA /OV AIR120030/TM 0055/FL290/TP B38M /TB OCNL MOD 290/RM ZOB
- Report
- a routine report filed through MPG
- Where
- 30 nm southeast (120°) of AIR
- Time
- 00:55 UTC
- Height
- at 29,000 ft
- Aircraft
- B38M
- Turbulence
- occasional moderate at 29,000 ft
- Remarks
- zob
- B38M at 20,000 ft, 10 nm southeast, 10:11 pm CDT (03:11 UTC): moderate clear-air turbulence from 20,000 ft to 25,000 ft. 580 nm along the route, 10 nm southeast of the line.
as filed, and in English
IAD UA /OV AML300020/TM 0311/FL200/TP B38M/TB MOD CAT 200-250
- Report
- a routine report filed through IAD
- Where
- 20 nm northwest (300°) of AML
- Time
- 03:11 UTC
- Height
- at 20,000 ft
- Aircraft
- B38M
- Turbulence
- moderate clear-air turbulence from 20,000 ft to 25,000 ft
- A21N at 17,000 ft, 5 nm southeast, 8:28 pm CDT (01:28 UTC): no icing, clear from 17,000 ft to 60,000 ft, remarks: clear since departing KIND southbound. 190 nm along the route, 5 nm southeast 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, 46 nm north, 8:15 pm CDT (01:15 UTC): a routine report with nothing remarked on. 290 nm along the route, 46 nm north 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, 49 nm north, 9:27 pm CDT (02:27 UTC): a routine report with nothing remarked on. 350 nm along the route, 49 nm north 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 25,000 ft, 14 nm north, 7:58 pm CDT (00:58 UTC): light turbulence, no icing, remarks: during the climb. 420 nm along the route, 14 nm north of the line.
as filed, and in English
PKB UA /OV JPU/TM 0058/FL250/TP BCS3/TB LGT/IC NEG/RM DURC
- Report
- a routine report filed through PKB
- Where
- over JPU
- Time
- 00:58 UTC
- Height
- at 25,000 ft
- Aircraft
- BCS3
- Turbulence
- light
- Icing
- none
- Remarks
- during the climb
- FA8X climbing, 14 nm south, 7:34 pm CDT (00:34 UTC): overcast above 1,000 ft. 600 nm along the route, 14 nm south of the line.
as filed, and in English
IAD UA /OV AML300005/TM 0034/FLDURC/TP FA8X/SK OVC010
- Report
- a routine report filed through IAD
- Where
- 5 nm northwest (300°) of AML
- Time
- 00:34 UTC
- Height
- during the climb
- Aircraft
- FA8X
- Sky
- overcast from 1,000 ft
- B38M at 400 ft, 20 nm south, 8:15 pm CDT (01:15 UTC): overcast above 40,000 ft. At the destination end, 20 nm south of the line.
as filed, and in English
DCA UA /OV DCA/TM 0115/FL004/TP B38M/SK OVC004
- Report
- a routine report filed through DCA
- Where
- over DCA
- Time
- 01:15 UTC
- Height
- at 400 ft
- Aircraft
- B38M
- Sky
- overcast from 400 ft
- B712 descending, 0 nm south, 10:10 pm CDT (03:10 UTC): remarks: light rain light chop bases 50,000 ft ft. At the destination end, 0 nm south of the line.
as filed, and in English
BWI UA /OV RWY 15R/TM 0310/FLDURD/TP B712/RM LIGHT RAIN. LIGHT CHOP. BASES 500 FT
- Report
- a routine report filed through BWI
- Where
- runway 15R
- Time
- 03:10 UTC
- Height
- during the descent
- Aircraft
- B712
- Remarks
- light rain light chop bases 50,000 ft ft
- A320 at 2,000 ft, 5 nm south, 8:46 pm CDT (01:46 UTC): a broken layer from 30,000 ft to 4,500 ft, remarks: CONLE5 sid. At the destination end, 5 nm south of the line.
as filed, and in English
BWI UA /OV BAL180005/TM 0146/FL020/TP A320/SK BKN003-TOP045/RM CONLE5 SID
- Report
- a routine report filed through BWI
- Where
- 5 nm south (180°) of BAL
- Time
- 01:46 UTC
- Height
- at 2,000 ft
- Aircraft
- A320
- Sky
- a broken layer from 300 ft, tops 4,500 ft
- Remarks
- CONLE5 sid
- B738 at 2,000 ft, 3 nm southwest, 8:43 pm CDT (01:43 UTC): a broken layer from 40,000 ft to 7,200 ft, remarks: TERPZ8 sid. At the destination end, 3 nm southwest of the line.
as filed, and in English
BWI UA /OV BAL260003/TM 0143/FL20/TP B738/SK BKN004-TOP072/RM TERPZ8 SID
- Report
- a routine report filed through BWI
- Where
- 3 nm west (260°) of BAL
- Time
- 01:43 UTC
- Height
- at 2,000 ft
- Aircraft
- B738
- Sky
- a broken layer from 400 ft, tops 7,200 ft
- Remarks
- TERPZ8 sid
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 9 forecast points nearest it (STL, SPI, EVV, IND, CVG, CMH, CRW, EKN, RIC). 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 15 kt | −13 kt | 133 kt | 4 h 49 min | 4:17 am EDT (08:17 UTC) | |
| 5,500 ft | 320° at 18 kt | −12 kt | 12 °C | 132 kt | 4 h 51 min | 4:19 am EDT (08:19 UTC) |
| 7,500 ft | 320° at 20 kt | −12 kt | 12 °C | 132 kt | 4 h 51 min | 4:19 am EDT (08:19 UTC) |
| 9,500 ft | 320° at 21 kt | −11 kt | 8 °C | 131 kt | 4 h 53 min | 4:21 am EDT (08:21 UTC) |
| 11,500 ft | 330° at 18 kt | −8 kt | 4 °C | 128 kt | 5 h | 4:28 am EDT (08:28 UTC) |
| 13,500 ft | 330° at 19 kt | −10 kt | 1 °C | 130 kt | 4 h 55 min | 4:23 am EDT (08:23 UTC) |
| 15,500 ft | 320° at 21 kt | −12 kt | -3 °C | 132 kt | 4 h 51 min | 4:19 am EDT (08:19 UTC) |
| 17,500 ft | 320° at 23 kt | −15 kt | -7 °C | 135 kt | 4 h 44 min | 4:12 am EDT (08:12 UTC) |
| 18,000 ft FL180 | 320° at 23 kt | −16 kt | -8 °C | 136 kt | 4 h 42 min | 4:10 am EDT (08:10 UTC) |
| 24,000 ft FL240 | 320° at 30 kt | −20 kt | -20 °C | 140 kt | 4 h 34 min | 4:02 am EDT (08:02 UTC) |
| 30,000 ft FL300 | 320° at 37 kt | −23 kt | -34 °C | 143 kt | 4 h 29 min | 3:57 am EDT (07:57 UTC) |
| 34,000 ft FL340 | 310° at 48 kt | −36 kt | -41 °C | 156 kt | 4 h 06 min | 3:34 am EDT (07:34 UTC) |
| 39,000 ft FL390 | 310° at 42 kt | −31 kt | -49 °C | 151 kt | 4 h 14 min | 3:42 am EDT (07:42 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; 71 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° |
| EVV | used from 100 nm out; 56 nm from the line | 280/15 | 290/12 17° | 310/16 10° | 320/13 5° | 310/22 -6° | 320/26 -18° | 320/38 -33° | 310/56 -41° | 320/55 -51° |
| IND | used from 150 nm out; 45 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° |
| CVG | used from 200 nm out; 42 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° |
| CMH | used from 300 nm out; 56 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° |
| CRW | used from 400 nm out; 52 nm from the line | 330/20 | 330/23 11° | 340/25 8° | 340/21 2° | 340/33 -9° | 340/41 -20° | 330/42 -35° | 320/44 -39° | 320/43 -47° |
| EKN | used from 450 nm out; 26 nm from the line | 330/21 12° | 330/25 7° | 350/22 2° | 330/24 -10° | 310/27 -21° | 320/33 -35° | 290/31 -39° | 290/34 -47° | |
| RIC | used from 600 nm out; 101 nm from the line | 270/23 | 280/19 11° | 270/18 8° | 240/22 4° | 230/39 -7° | 220/55 -18° | 220/75 -30° | 230/83 -39° | 230/64 -50° |
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 | ||||
| ALN Alton/St Louis, IL | 20 nm out, 8 nm northwest of the line, tower | no report just now | 543 ft | ||||
| OLY Olney-Noble, IL | 100 nm out, 12 nm south of the line | no report just now | 482 ft | ||||
| BMG Bloomington, IN | 180 nm out, 8 nm northwest of the line, tower | no report just now | 845 ft | ||||
| BAK Columbus, IN | 210 nm out, 12 nm north of the line, tower | no report just now | 656 ft | ||||
| LUK Cincinnati, OH | 280 nm out, 2 nm southwest of the line, tower | no report just now | 481 ft | ||||
| UNI Athens/Albany, OH | 380 nm out, 1 nm northeast of the line | no report just now | 765 ft | ||||
| PKB Parkersburg, WV | 420 nm out, 8 nm north of the line, tower | no report just now | 858 ft | ||||
| CKB Clarksburg, WV | 470 nm out, 6 nm northeast of the line, tower | no report just now | 1,223 ft | ||||
| OKV Winchester, VA | 570 nm out, 4 nm south of the line | no report just now | 726 ft | ||||
| JYO Leesburg, VA | 600 nm out, 7 nm south of the line, tower | no report just now | 389 ft | ||||
| BWI Baltimore, MD | destination | no report just now | 143 ft |
The highest airport on this list sits at 1,223 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BWI when you get there the forecast at the estimated arrival, 3:34 am EDT (07:34 UTC)
BWI has no terminal forecast; use the nearest airport that does.
Temporary flight restrictions on the line or within 25 nm of it
- 6/8029 Cincinnati, OH, Friday, October 9, 2026 through Monday, October 12, 2026 Local 0 nm from the route, 270 nm along the route · a VIP movement · until 12 October · ZID
- 6/8600 Sterling, VA, Monday, October 12, 2026 through Monday, October 12, 2026 Local 3 nm from the route, 610 nm along the route · a VIP movement · today · ZDC
- 4/9383 WASHINGTON, DC., USA 5 nm from the route, at the destination end · security · ZDC
- 6/8800 Baltimore, MD, Saturday, October 17, 2026 through Sunday, October 18, 2026 UTC 6 nm from the route, at the destination end · drones kept away from a public gathering · starts Saturday 17 October · ZDC
Daylight
Sunset at STL 6:27 pm CDT (23:27 UTC), at BWI 6:32 pm EDT (22:32 UTC) (civil twilight ends 6:59 pm EDT (22:59 UTC)). At 120 knots the arrival at BWI is before sunrise there (7:13 am EDT (11:13 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, Baltimore/Washington International Thurgood Marshall.