Plan a flight · Sun 10:45 pm EDT (02:45 UTC)

Cincinnati Muni/Lunken Field to Van Nuys Airport LUK → VNY

1,657 nautical miles (1,907 statute miles) west on a straight line, true course 271°, about 275° magnetic at the departure end (variation 4W). At 120 knots that is 16 h 34 min at the quickest height in today's winds (8,500 ft, a 20-knot headwind), arriving about 12:19 pm PDT (19:19 UTC). Right now LUK is marginal VFR, wind from the north (350°) at 5 knots; VNY is VFR, wind from the south (190°) at 8 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: 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 6W: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 11:55 pm EDT (03:55 UTC). Over the route from 899 to 1138 nm out.

as issued

WSUS33 KKCI 120155
MKCW WST 120155
CONVECTIVE SIGMET 6W
VALID UNTIL 0355Z
CO NM
FROM 50SSW DEN-30NNE TBE-50SSW CME-50E SJN-20NE DVC-50SSW DEN
AREA TS MOV FROM 23040KT. TOPS TO FL340.

SIGMET 9W: thunderstorms (a convective SIGMET) up to 28,000 ft, moving from the southwest at 20 knots, until 11:55 pm EDT (03:55 UTC). Near the route, 1288 nm along the route.

as issued

WSUS33 KKCI 120155
MKCW WST 120155
CONVECTIVE SIGMET 9W
VALID UNTIL 0355Z
AZ
FROM 20S TBC-30S INW-10E PHX-60SW DRK-30WNW DRK-20S TBC
DMSHG AREA EMBD TS MOV FROM 21020KT. TOPS TO FL280.

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 479 to 879 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 889 to 1438 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 928 to 1338 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 988 to 1138 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). Over the route from 1018 to 1088 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1218 to 1458 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 1278 to 1567 nm out.
AIRMET SIERRA 2E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the route from 1308 to 1418 nm out.
AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the route from 1458 to 1647 nm out.
AIRMET SIERRA 6E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the last 70 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 LUK.

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

urgent GLF6 at 45,000 ft, 26 nm north, 7:57 pm EDT (23:57 UTC): severe turbulence, remarks: a/c had to exit auto pilot, 45 degree pitch-zdv. 1168 nm along the route, 26 nm north of the line.
as filed, and in English
```
FMN UUA /OV RSK280050/TM 2357/FL450/TP GLF6/TB SEV/RM A/C HAD TO EXIT AUTO PILOT, 45 DEGREE PITCH-ZDV
```
Report
an urgent report filed through FMN
Where
50 nm west (280°) of RSK
Time
23:57 UTC
Height
at 45,000 ft
Aircraft
GLF6
Turbulence
severe
Remarks
a/c had to exit auto pilot, 45 degree pitch-zdv
BE9L at 24,500 ft, 46 nm north, 10:21 pm EDT (02:21 UTC): moderate turbulence, remarks: ZDVWC-41. 978 nm along the route, 46 nm north of the line.
as filed, and in English
```
PUB UA /OV PUB250040/TM 0221/FL245/TP BE9L/TB OCNL MOD/RM ZDVWC-41
```
Report
a routine report filed through PUB
Where
40 nm west (250°) of PUB
Time
02:21 UTC
Height
at 24,500 ft
Aircraft
BE9L
Turbulence
occasional moderate
Remarks
ZDVWC-41
GLF4 at 43,000 ft, 39 nm north, 8:09 pm EDT (00:09 UTC): moderate chop turbulence, remarks: ZDVWC-38. 1108 nm along the route, 39 nm north of the line.
as filed, and in English
```
FMN UA /OV RSK360050/TM 0009/FL430/TP GLF4/TB MOD CHOP/RM ZDVWC-38
```
Report
a routine report filed through FMN
Where
50 nm north (360°) of RSK
Time
00:09 UTC
Height
at 43,000 ft
Aircraft
GLF4
Turbulence
moderate chop
Remarks
ZDVWC-38
GLF4 at 43,000 ft, 28 nm north, 8:15 pm EDT (00:15 UTC): moderate turbulence, remarks: zdvwc. 1158 nm along the route, 28 nm north of the line.
as filed, and in English
```
FMN UA /OV RSK290045/TM 0015/FL430/TP GLF4/TB CONS MOD/RM ZDVWC
```
Report
a routine report filed through FMN
Where
45 nm west (290°) of RSK
Time
00:15 UTC
Height
at 43,000 ft
Aircraft
GLF4
Turbulence
continuous moderate
Remarks
zdvwc
E145 at 15,000 ft, 34 nm north, 9:45 pm EDT (01:45 UTC): moderate chop turbulence, light rime icing, -9 °C. 1507 nm along the route, 34 nm north of the line.
as filed, and in English
```
LAS UA /OV LAS213045/TM 0145/FL150/TP E145/TA M09/TB MOD CHOP/IC LGT RIME
```
Report
a routine report filed through LAS
Where
45 nm southwest (213°) of LAS
Time
01:45 UTC
Height
at 15,000 ft
Aircraft
E145
Temperature
−9 °C
Turbulence
moderate chop
Icing
light rime
B38M at 14,000 ft, 21 nm southeast, 8:13 pm EDT (00:13 UTC): moderate turbulence, light rime icing, 8 °C. 1587 nm along the route, 21 nm southeast of the line.
as filed, and in English
```
ONT UA /OV ONT053034/TM 0013/FL140/TP B38M/TA 08/TB MODERATE TURBULENCE/IC LIGHT RIME ICE 190 - 170
```
Report
a routine report filed through ONT
Where
34 nm northeast (053°) of ONT
Time
00:13 UTC
Height
at 14,000 ft
Aircraft
B38M
Temperature
8 °C
Turbulence
moderate turbulence
Icing
light rime ice at 19,000 ft at 17,000 ft
CRJ9 descending, 49 nm north, 9:15 pm EDT (01:15 UTC): a routine report with nothing remarked on. At the departure end, 49 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
E145 climbing, 49 nm north, 7:51 pm EDT (23:51 UTC): a routine report with nothing remarked on. At the departure end, 49 nm north of the line.
as filed, and in English
```
CMH UA /OV DAY/TM 2351/FLDURC/TP E145/SK B005 T035
```
Report
a routine report filed through CMH
Where
over DAY
Time
23:51 UTC
Height
during the climb
Aircraft
E145
Sky
B005 T035
B744 climbing, 6 nm northwest, 8:02 pm EDT (00:02 UTC): light turbulence, overcast. At the departure end, 6 nm northwest of the line.
as filed, and in English
```
CVG UA /OV 10 N CVG/TM 0002/FLDURC/TP B744/SK B022 OVC T036/TB LT TB SFC-036
```
Report
a routine report filed through CVG
Where
10 north cvg
Time
00:02 UTC
Height
during the climb
Aircraft
B744
Sky
B022 overcast T036
Turbulence
lt turbulence from the surface to 3,600 ft
B737 at 23,000 ft, 6 nm southwest, 7:51 pm EDT (23:51 UTC): light turbulence. At the departure end, 6 nm southwest of the line.
as filed, and in English
```
IND UA /OV CVG/TM 2351/FL230/TP B737/TB LGT
```
Report
a routine report filed through IND
Where
over CVG
Time
23:51 UTC
Height
at 23,000 ft
Aircraft
B737
Turbulence
light
A21N at 17,000 ft, 9 nm southeast, 9:28 pm EDT (01:28 UTC): no icing, clear from 17,000 ft to 60,000 ft, remarks: clear since departing KIND southbound. 90 nm along the route, 9 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
B38M at 23,700 ft, 5 nm south, 7:51 pm EDT (23:51 UTC): light turbulence. 140 nm along the route, 5 nm south of the line.
as filed, and in English
```
IND UA /OV TTH190030/TM 2351/FL237/TP B38M/TB LGT
```
Report
a routine report filed through IND
Where
30 nm south (190°) of TTH
Time
23:51 UTC
Height
at 23,700 ft
Aircraft
B38M
Turbulence
light
A21N at 31,000 ft, 46 nm north, 8:24 pm EDT (00:24 UTC): remarks: mountain wave +/-10-20KT ZDVWC-29. 938 nm along the route, 46 nm north of the line.
as filed, and in English
```
PUB UA /OV PUB/TM 0024/FL310/TP A21N/RM MTN WAVE +/-10-20KT ZDVWC-29
```
Report
a routine report filed through PUB
Where
over PUB
Time
00:24 UTC
Height
at 31,000 ft
Aircraft
A21N
Remarks
mountain wave +/-10-20KT ZDVWC-29
CL35 at 43,000 ft, 46 nm north, 8:21 pm EDT (00:21 UTC): remarks: mtw +/-300FT zdvwc. 978 nm along the route, 46 nm north of the line.
as filed, and in English
```
PUB UA /OV PUB250040/TM 0021/FL430/TP CL35/RM MTW +/-300FT ZDVWC
```
Report
a routine report filed through PUB
Where
40 nm west (250°) of PUB
Time
00:21 UTC
Height
at 43,000 ft
Aircraft
CL35
Remarks
mtw +/-300FT zdvwc

16 more routine reports are on the map.

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 17 forecast points nearest it (CVG, IND, EVV, SPI, STL, COU, MKC, SLN, GCK, PUB, ALS, FMN, BCE, PRC, LAS, ONT, WJF). 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	230° at 26 kt	+23 kt	15 °C	97 kt	17 h 05 min	12:50 pm PDT (19:50 UTC)
6,500 ft	240° at 23 kt	+22 kt	15 °C	98 kt	16 h 54 min	12:39 pm PDT (19:39 UTC)
8,500 ft	240° at 21 kt	+20 kt	11 °C	100 kt	16 h 34 min	12:19 pm PDT (19:19 UTC)
10,500 ft	230° at 21 kt	+20 kt	7 °C	100 kt	16 h 34 min	12:19 pm PDT (19:19 UTC)
12,500 ft	230° at 22 kt	+20 kt	3 °C	100 kt	16 h 34 min	12:19 pm PDT (19:19 UTC)
14,500 ft	230° at 26 kt	+24 kt	-1 °C	96 kt	17 h 16 min	1:01 pm PDT (20:01 UTC)
16,500 ft	230° at 30 kt	+28 kt	-5 °C	92 kt	18 h 01 min	1:46 pm PDT (20:46 UTC)
18,000 ft FL180	230° at 33 kt	+31 kt	-9 °C	89 kt	18 h 37 min	2:22 pm PDT (21:22 UTC)
24,000 ft FL240	230° at 39 kt	+37 kt	-20 °C	83 kt	19 h 58 min	3:43 pm PDT (22:43 UTC)
30,000 ft FL300	240° at 52 kt	+52 kt	-30 °C	68 kt	24 h 22 min	8:07 pm PDT (03:07 UTC)
34,000 ft FL340	250° at 57 kt	+59 kt	-37 °C	61 kt	27 h 10 min	10:55 pm PDT (05:55 UTC)
39,000 ft FL390	250° at 50 kt	+52 kt	-47 °C	68 kt	24 h 22 min	8:07 pm PDT (03:07 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
CVG	used from 0 nm out; 14 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 50 nm out; 39 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°
EVV	used from 150 nm out; 69 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°
SPI	used from 200 nm out; 53 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 250 nm out; 15 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°
COU	used from 300 nm out; 40 nm from the line	230/31	230/30 15°	260/16 11°	270/14 6°	260/24 -6°	270/27 -18°	270/37 -32°	280/49 -41°	290/56 -51°
MKC	used from 399 nm out; 54 nm from the line	220/44	250/28 18°	250/18 13°	240/12 6°	280/24 -6°	240/34 -18°	260/47 -30°	260/51 -40°	270/58 -50°
SLN	used from 549 nm out; 48 nm from the line	210/53	230/41 20°	240/26 14°	230/16 8°	240/25 -7°	240/35 -19°	250/61 -30°	260/65 -38°	260/56 -49°
GCK	used from 699 nm out; 45 nm from the line		220/48 21°	230/37 14°	250/30 8°	230/37 -6°	240/37 -20°	240/69 -28°	250/67 -37°	260/58 -48°
PUB	used from 849 nm out; 80 nm from the line			230/25 13°	230/32 6°	220/44 -8°	230/49 -21°	240/70 -28°	240/67 -34°	240/58 -46°
ALS	used from 948 nm out; 42 nm from the line				230/37 4°	220/54 -9°	230/62 -22°	240/77 -26°	240/74 -33°	230/59 -45°
FMN	used from 1048 nm out; 60 nm from the line			220/28 9°	220/40 2°	220/53 -10°	220/62 -22°	230/79 -28°	240/91 -34°	230/71 -45°
BCE	used from 1248 nm out; 105 nm from the line				220/27 -1°	210/40 -13°	220/54 -21°	220/64 -30°	220/64 -34°	220/52 -44°
PRC	used from 1298 nm out; 81 nm from the line			210/25 5°	200/30 1°	220/55 -10°	220/61 -21°	220/84 -28°	230/90 -34°	230/73 -45°
LAS	used from 1398 nm out; 67 nm from the line		210/21 10°	200/18 5°	200/23 -2°	210/49 -14°	210/63 -21°	220/58 -30°	220/61 -35°	210/56 -44°
ONT	used from 1547 nm out; 52 nm from the line	190/8	190/19 6°	210/23 4°	210/29 -3°	210/47 -13°	210/49 -19°	220/47 -30°	220/50 -36°	220/55 -43°
WJF	used from 1647 nm out; 31 nm from the line		200/28 6°	210/28 3°	210/29 -4°	210/28 -14°	220/41 -20°	220/47 -29°	220/46 -37°	220/53 -44°

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
LUK Cincinnati, OH	departure	marginal VFR Sky: overcast at 1,900 feet	from the north (350°) at 5 knots	10+ mi	1,900 ft	481 ft	9:53 pm EDT (01:53 UTC)
BMG Bloomington, IN	100 nm out, 4 nm northwest of the line, tower	marginal VFR Weather: mist	calm	3 mi	none	845 ft	02:34 UTC
ALN Alton/St Louis, IL	260 nm out, 8 nm south of the line, tower	VFR	from the southeast (140°) at 6 knots	10+ mi	none	543 ft	01:50 UTC
COU Columbia, MO	369 nm out, 7 nm southeast of the line, tower	VFR	from the south (190°) at 5 knots	10+ mi	none	889 ft	01:54 UTC
FOE Topeka, KS	519 nm out, 19 nm north of the line, tower	VFR	from the south (170°) at 10 knots	10+ mi	none	1,077 ft	01:53 UTC
GCK Garden City, KS	769 nm out, 9 nm south of the line, tower	VFR	from the south (170°) at 11 knots	10+ mi	none	2,890 ft	01:54 UTC
TAD Trinidad, CO	948 nm out, 16 nm southeast of the line	VFR	from the west-southwest (250°) at 13 knots	10+ mi	none	5,761 ft	01:54 UTC
FMN Farmington, NM	1138 nm out, 6 nm southeast of the line, tower	VFR Sky: a broken layer at 9,000 feet	from the south-southwest (210°) at 11 knots	10+ mi	9,000 ft	5,506 ft	01:53 UTC
GCN Grand Canyon, AZ	1328 nm out, 1 nm northwest of the line, tower	IFR Sky: a broken layer at 500 feet, a broken layer at 1,500 feet, overcast at 2,900 feet	from the southwest (220°) at 14 knots, gusting to 22	10+ mi	500 ft	6,608 ft	01:54 UTC
VCV Victorville, CA	1597 nm out, 3 nm northwest of the line, tower	VFR	from the south (180°) at 18 knots, gusting to 27	10+ mi	none	2,885 ft	02:35 UTC
VNY Van Nuys, CA	destination	VFR Sky: a broken layer at 8,000 feet	from the south (190°) at 8 knots	10+ mi	8,000 ft	802 ft	6:51 pm PDT (01:51 UTC)

The highest airport on this list sits at 6,608 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At VNY when you get there the forecast at the estimated arrival, 12:19 pm PDT (19:19 UTC)

Wind from the south at 5 knots, visibility more than 6 miles, a broken layer at 5,000 feet, overcast at 10,000 feet VFR

The whole forecast for VNY

From Sun 6:00 pm PDT (01:00 UTC): wind from the south at 10 knots, visibility more than 6 miles, scattered clouds at 6,000 feet, a broken layer at 12,000 feet
30% chance between Sun 6:00 pm PDT (01:00 UTC) and 11:00 pm PDT (06:00 UTC): light rain showers
From Sun 11:00 pm PDT (06:00 UTC): wind light and variable, visibility more than 6 miles, a broken layer at 5,000 feet, overcast at 10,000 feet
30% chance between Sun 11:00 pm PDT (06:00 UTC) and 5:00 am PDT (12:00 UTC): light rain showers
From Mon 11:00 am PDT (18:00 UTC): wind from the south at 5 knots, visibility more than 6 miles, a broken layer at 5,000 feet, overcast at 10,000 feet
From Mon 3:00 pm PDT (22:00 UTC): wind from the south at 9 knots, visibility more than 6 miles, overcast at 10,000 feet

The forecast for LUK, the departure

From Sun 8:00 pm EDT (00:00 UTC): wind from the northwest at 4 knots, visibility more than 6 miles, scattered clouds at 1,200 feet, overcast at 2,500 feet
From Sun 10:00 pm EDT (02:00 UTC): wind calm, visibility 3 miles, mist, a few clouds at 2,500 feet
From Mon 5:00 am EDT (09:00 UTC): wind calm, visibility 1 mile, mist, clear skies
At times between Mon 5:00 am EDT (09:00 UTC) and 9:00 am EDT (13:00 UTC): visibility ½ mile, fog, sky obscured at 200 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the south-southeast at 5 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
From Mon 1:00 pm EDT (17:00 UTC): wind from the south-southwest at 10 knots, visibility more than 6 miles, scattered clouds at 25,000 feet

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 on the route, at the departure end · a VIP movement · until 12 October · ZID
6/7634 CENTRALIA, MO, Monday, October 12, 2026 UTC 13 nm from the route, 359 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZKC
6/8891 Bullhead City, AZ, Wednesday, October 14, 2026 Local 0 nm from the route, 1458 nm along the route · a VIP movement · starts Wednesday 14 October · ZLA
6/8890 LAS VEGAS, NV, Tuesday, October 13, 2026 Local 24 nm from the route, 1468 nm along the route · a VIP movement · starts tomorrow · ZLA

Daylight

Sunset at LUK 7:03 pm EDT (23:03 UTC), at VNY 6:23 pm PDT (01:23 UTC) (civil twilight ends 6:48 pm PDT (01:48 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 central Great Lakes · loop National Weather Service

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

Radar now, the southern Plains · 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: Cincinnati Muni/Lunken Field, Van Nuys Airport.