Plan a flight · Mon 7:11 am PDT (14:11 UTC)

Boeing Fld/King County International to The Eastern Iowa Airport BFI → CID

1,339 nautical miles (1,541 statute miles) east on a straight line, true course 093°, about 078° magnetic at the departure end (variation 15E). At 120 knots that is 8 h 52 min at the quickest height in today's winds (39,000 ft, a 31-knot tailwind), arriving about 6:03 pm CDT (23:03 UTC). Right now BFI is VFR, wind from the southeast (130°) at 3 knots; CID is VFR, wind from the south (190°) at 9 knots. 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: 3 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 50 to 350 nm out.
AIRMET ZULU 2C: moderate icing up to 18,000 ft. Over the route from 180 to 580 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 230 to 590 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 370 to 1109 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 600 to 650 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 BFI.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

A320 at 25,000 ft, 23 nm north, 6:25 am PDT (13:25 UTC): light to moderate chop turbulence above 25,000 ft, remarks: zse. 270 nm along the route, 23 nm north of the line.
as filed, and in English
```
MLP UA /OV MLP/TM 1325/FL250/TP A320/TB CONS LGT OCNL MOD CHOP 250 /RM ZSE
```
Report
a routine report filed through MLP
Where
over MLP
Time
13:25 UTC
Height
at 25,000 ft
Aircraft
A320
Turbulence
continuous light occasional moderate chop at 25,000 ft
Remarks
zse
B752 at 41,000 ft, 8 nm north, 5:31 am PDT (12:31 UTC): light to moderate turbulence above 41,000 ft. 430 nm along the route, 8 nm north of the line.
as filed, and in English
```
HLN UA /OV HLN009010/TM 1231/FL410/TP B752/TB CONS LGT OCNL MOD 410/ZLC
```
Report
a routine report filed through HLN
Where
10 nm north (009°) of HLN
Time
12:31 UTC
Height
at 41,000 ft
Aircraft
B752
Turbulence
continuous light occasional moderate 410/ZLC
BE9L at 7,500 ft, 9 nm southwest, 5:45 am PDT (12:45 UTC): no turbulence, light rime icing, overcast from 7,500 ft to 9,000 ft, -6 °C, remarks: during the climb. 440 nm along the route, 9 nm southwest of the line.
as filed, and in English
```
HLN UA /OV HLN120010/TM 1245/FL075/TP BE9L/SK OVC075-TOPS090/TA M06/TB NEG/IC LGT RIME/RM DURC
```
Report
a routine report filed through HLN
Where
10 nm southeast (120°) of HLN
Time
12:45 UTC
Height
at 7,500 ft
Aircraft
BE9L
Sky
overcast from 7,500 ft, tops 9,000 ft
Temperature
−6 °C
Turbulence
none
Icing
light rime
Remarks
during the climb
GLF4 descending, 45 nm south, 6:48 am PDT (13:48 UTC): a routine report with nothing remarked on. 470 nm along the route, 45 nm south of the line.
as filed, and in English
```
BZN UA /OV BZN/TM 1348/FLDURD/TP GLF4/SK 047
```
Report
a routine report filed through BZN
Where
over BZN
Time
13:48 UTC
Height
during the descent
Aircraft
GLF4
Sky
at 4,700 ft
C340 descending, 45 nm south, 5:47 am PDT (12:47 UTC): light icing, remarks: smooth. 470 nm along the route, 45 nm south of the line.
as filed, and in English
```
BZN UA /OV BZN/TM 1247/FLDURD/TP C340/SK 055/IC LGT RM/RM SMOOTH
```
Report
a routine report filed through BZN
Where
over BZN
Time
12:47 UTC
Height
during the descent
Aircraft
C340
Sky
at 5,500 ft
Icing
light remarks
Remarks
smooth
C25A at 5,000 ft, 20 nm south, 6:00 am PDT (13:00 UTC): light rime icing, 4 °C, remarks: lt rime in the descent. 570 nm along the route, 20 nm south of the line.
as filed, and in English
```
BIL UA /OV 100006/TM 1300/FL050/TP C25A/TA 4/IC LT RIME/RM LT RIME IN THE DESCENT
```
Report
a routine report filed through BIL
Where
wind from 100° at 6 knots
Time
13:00 UTC
Height
at 5,000 ft
Aircraft
C25A
Temperature
4 °C
Icing
lt rime
Remarks
lt rime in the descent
SF50 at 4,000 ft, 1 nm south, 6:47 am PDT (13:47 UTC): no turbulence, no icing. 939 nm along the route, 1 nm south of the line.
as filed, and in English
```
PIR UA /OV PIR/TM 1347/FL040/TP SF50/SK BASE008-TOP040/TB NEG/IC NEG
```
Report
a routine report filed through PIR
Where
over PIR
Time
13:47 UTC
Height
at 4,000 ft
Aircraft
SF50
Sky
BASE008-TOP040
Turbulence
none
Icing
none
UAL1095 at 36,000 ft, 9 nm northeast, 6:00 am PDT (13:00 UTC): no turbulence, -41 °C, wind 253° at 52 knots. 1089 nm along the route, 9 nm northeast of the line.
as filed, and in English
```
ARP UAL1095 4338N 09646W 1300 F360 MS41 253/052KT TB NONE SK CLEAR IC
```
Report
a routine report filed through ARP
B38M at 32,000 ft, 9 nm southwest, 4:45 am PDT (11:45 UTC): light chop turbulence. 1159 nm along the route, 9 nm southwest of the line.
as filed, and in English
```
FOD UA /OV FOD285060/TM 1145/FL320/TP B38M/TB CONS LGT CHOP OCNL MOD CHOP
```
Report
a routine report filed through FOD
Where
60 nm west (285°) of FOD
Time
11:45 UTC
Height
at 32,000 ft
Aircraft
B38M
Turbulence
continuous light chop occasional moderate chop
BE36 at 6,000 ft, 47 nm north, 6:12 am PDT (13:12 UTC): no turbulence. 1189 nm along the route, 47 nm north of the line.
as filed, and in English
```
FRM UA /OV FRM/TM 1312/FL060/TP BE36/TB NEG
```
Report
a routine report filed through FRM
Where
over FRM
Time
13:12 UTC
Height
at 6,000 ft
Aircraft
BE36
Turbulence
none
B38M at 32,000 ft, 11 nm north, 4:35 am PDT (11:35 UTC): light chop turbulence above 32,000 ft. 1249 nm along the route, 11 nm north of the line.
as filed, and in English
```
FOD UA /OV FOD075035/TM 1135/FL320/TP B38M/TB CONS LGT CHOP 320/INTMT LGT CHOP 340
```
Report
a routine report filed through FOD
Where
35 nm east (075°) of FOD
Time
11:35 UTC
Height
at 32,000 ft
Aircraft
B38M
Turbulence
continuous light chop 320/INTMT light chop at 34,000 ft
P46T at 31,000 ft, 22 nm northeast, 6:37 am PDT (13:37 UTC): light chop turbulence. At the destination end, 22 nm northeast of the line.
as filed, and in English
```
ALO UA /OV ALO270005/TM 1337/FL310/TP P46T/TB INTMT LGT CHOP
```
Report
a routine report filed through ALO
Where
5 nm west (270°) of ALO
Time
13:37 UTC
Height
at 31,000 ft
Aircraft
P46T
Turbulence
intermittent light chop
A321 at 32,000 ft, 9 nm northeast, 5:25 am PDT (12:25 UTC): light chop turbulence. At the destination end, 9 nm northeast of the line.
as filed, and in English
```
CID UA /OV CID360010/TM 1225/FL320/TP A321/TB INTMT LGT CHOP CONS LGT CHOP
```
Report
a routine report filed through CID
Where
10 nm north (360°) of CID
Time
12:25 UTC
Height
at 32,000 ft
Aircraft
A321
Turbulence
intermittent light chop continuous light chop

Winds aloft along the route, and the time en route the forecast for use 14:00–21:00 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 13 forecast points nearest it (SEA, YKM, GEG, LWS, GPI, GTF, BIL, MLS, RAP, PIR, FSD, MCW, DBQ). 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	260° at 5 kt	−4 kt	3 °C	124 kt	10 h 48 min	7:59 pm CDT (00:59 UTC)
7,500 ft	250° at 7 kt	−5 kt	6 °C	125 kt	10 h 43 min	7:54 pm CDT (00:54 UTC)
9,500 ft	250° at 10 kt	−7 kt	3 °C	127 kt	10 h 33 min	7:44 pm CDT (00:44 UTC)
11,500 ft	250° at 13 kt	−9 kt	0 °C	129 kt	10 h 23 min	7:34 pm CDT (00:34 UTC)
13,500 ft	250° at 14 kt	−10 kt	-4 °C	130 kt	10 h 18 min	7:29 pm CDT (00:29 UTC)
15,500 ft	240° at 15 kt	−10 kt	-8 °C	130 kt	10 h 18 min	7:29 pm CDT (00:29 UTC)
17,500 ft	240° at 16 kt	−9 kt	-13 °C	129 kt	10 h 23 min	7:34 pm CDT (00:34 UTC)
18,000 ft FL180	240° at 16 kt	−9 kt	-14 °C	129 kt	10 h 23 min	7:34 pm CDT (00:34 UTC)
24,000 ft FL240	240° at 22 kt	−14 kt	-26 °C	134 kt	10 h	7:11 pm CDT (00:11 UTC)
30,000 ft FL300	250° at 28 kt	−20 kt	-36 °C	140 kt	9 h 34 min	6:45 pm CDT (23:45 UTC)
34,000 ft FL340	250° at 35 kt	−26 kt	-39 °C	146 kt	9 h 10 min	6:21 pm CDT (23:21 UTC)
39,000 ft FL390	240° at 43 kt	−31 kt	-44 °C	151 kt	8 h 52 min	6:03 pm CDT (23:03 UTC)

Based on data from the 12th at 12:00 UTC; valid on the 12th at 18:00 UTC for use 14:00 to 21:00 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; 26 nm from the line	L/V	L/V 1°	020/13 -2°	020/27 -4°	010/43 -14°	360/54 -26°	360/63 -40°	010/60 -48°	350/39 -50°
YKM	used from 50 nm out; 53 nm from the line	L/V	350/9 0°	040/20 -5°	030/23 -8°	020/41 -18°	010/74 -27°	010/73 -40°	020/54 -44°	350/9 -43°
GEG	used from 100 nm out; 71 nm from the line		060/10 -2°	050/11 -3°	050/9 -8°	050/27 -19°	040/26 -31°	030/32 -39°	020/19 -41°	L/V -42°
LWS	used from 250 nm out; 72 nm from the line	L/V	L/V -2°	030/6 -5°	050/10 -10°	110/19 -21°	150/22 -31°	130/11 -36°	200/6 -37°	220/21 -40°
GPI	used from 300 nm out; 82 nm from the line		L/V -3°	L/V -4°	L/V -6°	210/19 -17°	220/26 -32°	190/23 -40°	220/25 -39°	220/34 -42°
GTF	used from 350 nm out; 84 nm from the line		L/V	L/V -4°	230/12 -3°	210/12 -17°	190/23 -29°	200/48 -39°	210/69 -39°	220/66 -42°
BIL	used from 500 nm out; 54 nm from the line		L/V	250/11 -1°	240/20 -2°	230/28 -15°	220/28 -28°	220/53 -34°	220/55 -39°	220/63 -44°
MLS	used from 650 nm out; 44 nm from the line		320/9 -2°	270/14 0°	260/22 -1°	220/30 -14°	210/43 -26°	230/53 -34°	230/54 -38°	230/59 -44°
RAP	used from 750 nm out; 80 nm from the line		310/18 6°	270/15 6°	260/20 2°	240/28 -11°	240/42 -23°	240/47 -35°	230/47 -36°	240/56 -44°
PIR	used from 849 nm out; 61 nm from the line		300/15 10°	270/10 10°	220/18 4°	220/36 -11°	230/43 -21°	240/48 -33°	240/51 -37°	240/55 -44°
FSD	used from 999 nm out; 71 nm from the line	260/9	210/16 18°	220/27 14°	230/28 6°	240/39 -9°	240/48 -22°	260/52 -32°	260/61 -38°	260/60 -46°
MCW	used from 1149 nm out; 79 nm from the line	220/19	210/29 20°	230/35 13°	250/35 5°	250/33 -9°	260/44 -21°	260/46 -33°	270/58 -37°	270/59 -46°
DBQ	used from 1299 nm out; 67 nm from the line	250/26	240/32 19°	250/35 11°	260/37 5°	270/35 -9°	270/40 -21°	270/43 -35°	280/49 -37°	280/58 -46°

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
BFI Seattle, WA	departure	VFR	from the southeast (130°) at 3 knots	10+ mi	none	21 ft	6:53 am PDT (13:53 UTC)
MWH Moses Lake, WA	120 nm out, 10 nm south of the line, tower	VFR	from the north (010°) at 4 knots	10+ mi	none	1,188 ft	13:52 UTC
GEG Spokane, WA	190 nm out, 22 nm north of the line, tower	VFR Sky: scattered clouds at 3,800 feet, a broken layer at 8,000 feet, a broken layer at 11,000 feet	from the east (100°) at 9 knots	10+ mi	8,000 ft	2,385 ft	13:53 UTC
MSO Missoula, MT	340 nm out, 3 nm west of the line, tower	VFR Sky: overcast at 6,500 feet	from the north (350°) at 3 knots	10+ mi	6,500 ft	3,205 ft	13:53 UTC
HLN Helena, MT	430 nm out, 5 nm west of the line, tower	marginal VFR Sky: a broken layer at 2,000 feet, overcast at 4,300 feet	from the west (270°) at 6 knots	10+ mi	2,000 ft	3,877 ft	13:53 UTC
BIL Billings, MT	580 nm out, 20 nm southwest of the line, tower	VFR Sky: scattered clouds at 2,100 feet, overcast at 3,700 feet	from the southwest (220°) at 4 knots	10+ mi	3,700 ft	3,662 ft	13:53 UTC
MHE Mitchell, SD	1039 nm out, 4 nm southwest of the line	low IFR Sky: overcast at 200 feet Weather: fog	from the north (350°) at 6 knots	0.5 mi	200 ft	1,304 ft	13:53 UTC
FSD Sioux Falls, SD	1099 nm out, 7 nm north of the line, tower	VFR Sky: a few clouds at 10,000 feet, scattered clouds at 25,000 feet	from the northeast (050°) at 4 knots	10+ mi	none	1,430 ft	13:56 UTC
ALO Waterloo, IA	1299 nm out, 24 nm north of the line, tower	VFR	from the south (170°) at 4 knots	10+ mi	none	873 ft	13:54 UTC
CID Cedar Rapids, IA	destination	VFR	from the south (190°) at 9 knots	10+ mi	none	869 ft	8:52 am CDT (13:52 UTC)

The highest airport on this list sits at 3,877 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At CID when you get there the forecast at the estimated arrival, 6:03 pm CDT (23:03 UTC)

Wind from the south-southwest at 12 knots, gusting to 22, visibility more than 6 miles, scattered clouds at 20,000 feet VFR

The whole forecast for CID

From Mon 7:00 am CDT (12:00 UTC): wind from the south-southwest at 10 knots, visibility more than 6 miles, low-level wind shear, a broken layer at 20,000 feet
From Mon 9:00 am CDT (14:00 UTC): wind from the south-southwest at 12 knots, gusting to 22, visibility more than 6 miles, scattered clouds at 20,000 feet
From Mon 7:00 pm CDT (00:00 UTC): wind from the south-southwest at 10 knots, visibility more than 6 miles, low-level wind shear, clear skies
From Tue 12:00 am CDT (05:00 UTC): wind from the west-southwest at 10 knots, visibility more than 6 miles, clear skies

The forecast for BFI, the departure

From Mon 5:00 am PDT (12:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
From Mon 12:00 pm PDT (19:00 UTC): wind from the west-southwest at 4 knots, visibility more than 6 miles, clear skies
From Mon 2:00 pm PDT (21:00 UTC): wind from the west-northwest at 5 knots, visibility more than 6 miles, clear skies
From Mon 8:00 pm PDT (03:00 UTC): wind calm, visibility more than 6 miles, scattered clouds at 25,000 feet
From Tue 4:00 am PDT (11:00 UTC): wind from the south-southeast at 4 knots, visibility more than 6 miles, overcast at 10,000 feet

Temporary flight restrictions on the line or within 25 nm of it

6/8927 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local on the route, 310 nm along the route · a VIP movement · starts Wednesday 14 October · ZSE
6/8923 Kalispell, MT, Wednesday, October 14, 2026 through Wednesday, October 14, 2026 Local on the route, 310 nm along the route · a VIP movement · starts Wednesday 14 October · ZLC

Daylight

Sunset at BFI 6:25 pm PDT (01:25 UTC), at CID 6:30 pm CDT (23:30 UTC) (civil twilight ends 6:58 pm CDT (23:58 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

Radar now, the Pacific Northwest · loop National Weather Service

Radar now, the northern Rockies · loop National Weather Service

Radar now, the upper Mississippi valley · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

Forecast chart, 24 hours ahead Weather Prediction Center

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: Boeing Fld/King County International, The Eastern Iowa Airport.