Gary/Chicago International to Billings Logan International GYY → BIL
948 nautical miles (1,091 statute miles) northwest on a straight line, true course 293°, about 295° magnetic at the departure end (variation 2W). At 120 knots that is 8 h 10 min at the quickest height in today's winds (4,500 ft, a 4-knot headwind), arriving about 8:48 am MDT (14:48 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: 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 C11C: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the southwest at 40 knots, until 2:55 am CDT (07:55 UTC). Over the route from 668 to 718 nm out.
as issued
WSUS32 KKCI 120555 MKCC WST 120555 CONVECTIVE SIGMET 11C VALID UNTIL 0755Z SD WY FROM 60WNW DPR-20SSE DPR-40SSW RAP-60W RAP-60WNW DPR DMSHG AREA TS MOV FROM 22040KT. TOPS TO FL310.
- 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 0 nm of the route.
- AIRMET TANGO 3W: 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 130 to 319 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 last 519 nm of the route.
- 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 758 to 848 nm out.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Near the route, 788 nm along the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 808 to 898 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the last 120 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Near the route, at the destination end.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Near the route, at the destination end.
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 GYY.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
No pilot reports within 50 nautical miles of the line in the last three hours.
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 9 forecast points nearest it (JOT, DBQ, MCW, FSD, ABR, PIR, RAP, MLS, BIL). 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 | 210° at 18 kt | +4 kt | 10 °C | 116 kt | 8 h 10 min | 8:48 am MDT (14:48 UTC) |
| 6,500 ft | 220° at 18 kt | +7 kt | 13 °C | 113 kt | 8 h 23 min | 9:01 am MDT (15:01 UTC) |
| 8,500 ft | 220° at 19 kt | +7 kt | 11 °C | 113 kt | 8 h 23 min | 9:01 am MDT (15:01 UTC) |
| 10,500 ft | 220° at 22 kt | +10 kt | 7 °C | 110 kt | 8 h 37 min | 9:15 am MDT (15:15 UTC) |
| 12,500 ft | 220° at 25 kt | +13 kt | 4 °C | 107 kt | 8 h 52 min | 9:30 am MDT (15:30 UTC) |
| 14,500 ft | 230° at 24 kt | +15 kt | -1 °C | 105 kt | 9 h 02 min | 9:40 am MDT (15:40 UTC) |
| 16,500 ft | 240° at 25 kt | +17 kt | -5 °C | 103 kt | 9 h 12 min | 9:50 am MDT (15:50 UTC) |
| 18,000 ft FL180 | 240° at 25 kt | +19 kt | -9 °C | 101 kt | 9 h 23 min | 10:01 am MDT (16:01 UTC) |
| 24,000 ft FL240 | 250° at 30 kt | +23 kt | -21 °C | 97 kt | 9 h 46 min | 10:24 am MDT (16:24 UTC) |
| 30,000 ft FL300 | 240° at 35 kt | +25 kt | -35 °C | 95 kt | 9 h 59 min | 10:37 am MDT (16:37 UTC) |
| 34,000 ft FL340 | 250° at 49 kt | +43 kt | -41 °C | 77 kt | 12 h 19 min | 12:57 pm MDT (18:57 UTC) |
| 39,000 ft FL390 | 260° at 57 kt | +53 kt | -49 °C | 67 kt | 14 h 09 min | 2:47 pm MDT (20:47 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| JOT | used from 0 nm out; 19 nm from the line | 250/23 | 270/22 15° | 250/16 10° | 240/9 4° | 280/22 -7° | 280/29 -19° | 300/29 -34° | 290/50 -43° | 300/64 -52° |
| DBQ | used from 100 nm out; 31 nm from the line | 230/33 | 250/30 16° | 280/15 9° | 260/15 5° | 260/21 -7° | 260/24 -20° | 250/37 -33° | 270/42 -43° | 280/63 -52° |
| MCW | used from 200 nm out; 54 nm from the line | 220/44 | 250/30 17° | 230/14 12° | 240/17 6° | 250/22 -8° | 270/29 -20° | 250/34 -34° | 260/52 -43° | 260/59 -51° |
| FSD | used from 349 nm out; 59 nm from the line | 190/9 | 230/30 18° | 240/23 13° | 240/20 6° | 260/22 -9° | 250/31 -21° | 250/43 -36° | 260/49 -43° | 270/53 -47° |
| ABR | used from 499 nm out; 63 nm from the line | 070/14 | 250/10 17° | 270/16 11° | 260/28 5° | 260/36 -10° | 260/41 -22° | 270/33 -37° | 260/42 -42° | 260/50 -48° |
| PIR | used from 549 nm out; 23 nm from the line | 170/22 19° | 190/25 13° | 210/32 6° | 240/23 -9° | 250/32 -21° | 250/38 -36° | 260/44 -40° | 260/52 -47° | |
| RAP | used from 648 nm out; 70 nm from the line | 180/23 12° | 200/38 13° | 210/38 6° | 220/28 -10° | 230/34 -21° | 230/37 -36° | 250/52 -38° | 250/59 -46° | |
| MLS | used from 748 nm out; 89 nm from the line | 150/23 2° | 190/29 4° | 210/44 2° | 220/32 -10° | 210/36 -21° | 200/48 -37° | 230/63 -40° | 240/71 -47° | |
| BIL | used from 898 nm out; 25 nm from the line | 080/13 | 180/9 -2° | 210/38 0° | 220/51 -11° | 210/46 -22° | 210/58 -35° | 230/73 -39° | 230/72 -45° |
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 |
|---|---|---|---|---|---|---|---|
| GYY Gary/Chicago, IN | departure | no report just now | 596 ft | ||||
| DPA Chicago/West Chicago, IL | 40 nm out, 2 nm north of the line, tower | no report just now | 758 ft | ||||
| DBQ Dubuque, IA | 150 nm out, 11 nm southwest of the line, tower | no report just now | 1,076 ft | ||||
| CCY Charles City, IA | 249 nm out, 3 nm east of the line | no report just now | 1,125 ft | ||||
| MJQ Jackson, MN | 359 nm out, 3 nm east of the line | no report just now | 1,445 ft | ||||
| PQN Pipestone, MN | 419 nm out, 4 nm northeast of the line | no report just now | 1,736 ft | ||||
| HON Huron, SD | 499 nm out, 5 nm northwest of the line | no report just now | 1,288 ft | ||||
| PIR Pierre, SD | 589 nm out, 19 nm south of the line | no report just now | 1,744 ft | ||||
| BIL Billings, MT | destination | no report just now | 3,662 ft |
The highest airport on this list sits at 3,662 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At BIL when you get there the forecast at the estimated arrival, 8:48 am MDT (14:48 UTC)
BIL has no terminal forecast; use the nearest airport that does.
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 GYY 6:13 pm CDT (23:13 UTC), at BIL 6:32 pm MDT (00:32 UTC) (civil twilight ends 7:02 pm MDT (01:02 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: Gary/Chicago International, Billings Logan International.