Seattle-Tacoma International to South Bend International SEA → SBN
1,563 nautical miles (1,798 statute miles) east on a straight line, true course 089°, about 073° magnetic at the departure end (variation 16E). At 120 knots that is 9 h 35 min at the quickest height in today's winds (39,000 ft, a 43-knot tailwind), arriving about 1:39 pm EDT (17:39 UTC). Right now SEA is VFR, wind from the west (270°) at 3 knots; SBN is VFR, wind calm. 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
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the route from 30 to 398 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 159 to 647 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 249 to 557 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 269 to 1115 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 657 to 746 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). Near the route, 766 nm along 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 1234 to 1423 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 SEA.
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 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 (SEA, YKM, GEG, GPI, GTF, BIL, MLS, DIK, PIR, ABR, FSD, MSP, MCW, LSE, DBQ, JOT). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 5,500 ft | 190° at 7 kt | +2 kt | 3 °C | 118 kt | 13 h 15 min | 5:19 pm EDT (21:19 UTC) |
| 7,500 ft | 200° at 7 kt | 0 | 7 °C | 120 kt | 13 h 02 min | 5:06 pm EDT (21:06 UTC) |
| 9,500 ft | 210° at 9 kt | −2 kt | 3 °C | 122 kt | 12 h 49 min | 4:53 pm EDT (20:53 UTC) |
| 11,500 ft | 220° at 13 kt | −5 kt | 0 °C | 125 kt | 12 h 30 min | 4:34 pm EDT (20:34 UTC) |
| 13,500 ft | 220° at 16 kt | −8 kt | -3 °C | 128 kt | 12 h 13 min | 4:17 pm EDT (20:17 UTC) |
| 15,500 ft | 230° at 18 kt | −11 kt | -7 °C | 131 kt | 11 h 56 min | 4:00 pm EDT (20:00 UTC) |
| 17,500 ft | 240° at 20 kt | −13 kt | -11 °C | 133 kt | 11 h 45 min | 3:49 pm EDT (19:49 UTC) |
| 18,000 ft FL180 | 240° at 21 kt | −14 kt | -12 °C | 134 kt | 11 h 40 min | 3:44 pm EDT (19:44 UTC) |
| 24,000 ft FL240 | 240° at 23 kt | −16 kt | -23 °C | 136 kt | 11 h 30 min | 3:34 pm EDT (19:34 UTC) |
| 30,000 ft FL300 | 240° at 28 kt | −19 kt | -36 °C | 139 kt | 11 h 15 min | 3:19 pm EDT (19:19 UTC) |
| 34,000 ft FL340 | 250° at 39 kt | −33 kt | -41 °C | 153 kt | 10 h 13 min | 2:17 pm EDT (18:17 UTC) |
| 39,000 ft FL390 | 250° at 48 kt | −43 kt | -47 °C | 163 kt | 9 h 35 min | 1:39 pm EDT (17:39 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| SEA | used from 0 nm out; 25 nm from the line | 050/7 | 050/11 1° | 050/12 -5° | 030/31 -7° | 010/61 -15° | 010/69 -26° | 360/73 -40° | 360/62 -47° | 330/21 -43° |
| YKM | used from 50 nm out; 53 nm from the line | 070/10 | 040/15 -1° | 020/27 -8° | 030/25 -13° | 020/48 -20° | 010/83 -27° | 010/77 -37° | 010/49 -40° | 350/14 -41° |
| GEG | used from 100 nm out; 70 nm from the line | 080/16 -2° | 050/17 -7° | 080/9 -10° | 190/33 -21° | 180/31 -32° | L/V -35° | L/V -37° | 270/8 -40° | |
| GPI | used from 249 nm out; 81 nm from the line | 070/19 -5° | 100/16 -7° | 080/10 -8° | 130/8 -19° | 170/37 -28° | 200/50 -40° | 210/43 -40° | 220/41 -42° | |
| GTF | used from 348 nm out; 75 nm from the line | 070/11 | 080/15 -7° | 110/19 -9° | 190/25 -14° | 200/34 -23° | 200/54 -39° | 220/66 -40° | 220/77 -44° | |
| BIL | used from 498 nm out; 74 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° | |
| MLS | used from 597 nm out; 53 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° | |
| DIK | used from 746 nm out; 57 nm from the line | 150/24 7° | 200/38 6° | 220/53 0° | 230/51 -9° | 230/49 -21° | 240/37 -37° | 240/47 -44° | 250/65 -48° | |
| PIR | used from 846 nm out; 88 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° | |
| ABR | used from 946 nm out; 30 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° |
| FSD | used from 1045 nm out; 68 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° |
| MSP | used from 1145 nm out; 72 nm from the line | 230/26 | 240/30 17° | 240/24 12° | 250/22 5° | 250/35 -10° | 260/36 -21° | 250/41 -36° | 250/49 -45° | 260/58 -52° |
| MCW | used from 1194 nm out; 46 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° |
| LSE | used from 1294 nm out; 34 nm from the line | 230/40 | 240/24 17° | 240/13 10° | 250/13 6° | 280/22 -9° | 250/28 -21° | 250/41 -34° | 260/42 -44° | 270/62 -53° |
| DBQ | used from 1344 nm out; 40 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° |
| JOT | used from 1443 nm out; 51 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° |
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 |
|---|---|---|---|---|---|---|---|
| SEA Seattle, WA | departure | VFR | from the west (270°) at 3 knots | 10+ mi | none | 432 ft | 12:53 am PDT (07:53 UTC) |
| MWH Moses Lake, WA | 119 nm out, 14 nm south of the line, tower | VFR | from the north (350°) at 6 knots | 10+ mi | none | 1,188 ft | 07:52 UTC |
| GEG Spokane, WA | 189 nm out, 15 nm north of the line, tower | VFR Sky: a few clouds at 5,500 feet, a broken layer at 8,000 feet, a broken layer at 11,000 feet | from the northeast (040°) at 7 knots | 10+ mi | 8,000 ft | 2,385 ft | 07:53 UTC |
| MSO Missoula, MT | 338 nm out, 18 nm south of the line, tower | VFR Sky: overcast at 7,500 feet | from the west (260°) at 4 knots | 10+ mi | 7,500 ft | 3,205 ft | 07:53 UTC |
| LWT Lewistown, MT | 528 nm out, 14 nm north of the line | no report just now | 4,170 ft | ||||
| MLS Miles City, MT | 677 nm out, 3 nm northwest of the line | IFR Sky: overcast at 800 feet Weather: light rain | from the northeast (050°) at 9 knots | 10+ mi | 800 ft | 2,634 ft | 07:53 UTC |
| MBG Mobridge, SD | 906 nm out, 5 nm northeast of the line | IFR Sky: overcast at 500 feet | from the northeast (050°) at 11 knots | 9 mi | 500 ft | 1,716 ft | 07:52 UTC |
| ATY Watertown, SD | 1055 nm out, 7 nm north of the line | low IFR Sky: sky obscured at 200 feet Weather: fog | from the north-northeast (030°) at 8 knots | 0.25 mi | 200 ft | 1,749 ft | 08:00 UTC |
| MML Marshall, MN | 1115 nm out, 2 nm south of the line | low IFR Sky: overcast at 300 feet Weather: mist | from the northwest (320°) at 5 knots | 5 mi | 300 ft | 1,182 ft | 07:56 UTC |
| RST Rochester, MN | 1264 nm out, 16 nm north of the line, tower | VFR | from the south (190°) at 12 knots | 9 mi | none | 1,317 ft | 07:54 UTC |
| JVL Janesville, WI | 1433 nm out, 4 nm northwest of the line, tower | VFR | calm | 10+ mi | none | 807 ft | 07:55 UTC |
| SBN South Bend, IN | destination | VFR | calm | 10+ mi | none | 798 ft | 3:54 am EDT (07:54 UTC) |
The highest airport on this list sits at 4,170 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At SBN when you get there the forecast at the estimated arrival, 1:39 pm EDT (17:39 UTC)
Wind from the south at 8 knots, visibility more than 6 miles, scattered clouds at 25,000 feet VFR
The whole forecast for SBN
- From Mon 2:00 am EDT (06:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
- At times between Mon 2:00 am EDT (06:00 UTC) and 5:00 am EDT (09:00 UTC): visibility 2 miles, mist
- From Mon 6:00 am EDT (10:00 UTC): wind from the south at 8 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
- From Mon 2:00 pm EDT (18:00 UTC): wind from the south-southwest at 12 knots, gusting to 20, visibility more than 6 miles, scattered clouds at 25,000 feet
- From Mon 8:00 pm EDT (00:00 UTC): wind from the south-southwest at 9 knots, visibility more than 6 miles, scattered clouds at 10,000 feet
The forecast for SEA, the departure
- From Sun 11:00 pm PDT (06:00 UTC): wind from the east-northeast at 6 knots, visibility more than 6 miles, clear skies
- From Mon 3:00 am PDT (10:00 UTC): wind from the southeast at 4 knots, visibility more than 6 miles, patches of fog, clear skies
- From Mon 9:00 am PDT (16:00 UTC): wind from the south-southeast at 4 knots, visibility more than 6 miles, clear skies
- From Mon 11:00 am PDT (18:00 UTC): wind from the west at 6 knots, visibility more than 6 miles, clear skies
- From Mon 8:00 pm PDT (03:00 UTC): wind from the south at 4 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
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 SEA 6:25 pm PDT (01:25 UTC), at SBN 7:09 pm EDT (23:09 UTC) (civil twilight ends 7:36 pm EDT (23:36 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: Seattle-Tacoma International, South Bend International.