The U.S. aircraft register, updated daily
Plan a flight · Sun 7:15 pm PDT (02:15 UTC)

San Diego International to Jacksonville International SAN → JAX

1,812 nautical miles (2,085 statute miles) east on a straight line, true course 085°, about 074° magnetic at the departure end (variation 11E). At 120 knots that is 11 h 15 min at the quickest height in today's winds (34,000 ft, a 41-knot tailwind), arriving about 9:30 am EDT (13:30 UTC). Right now SAN is VFR, wind from the west (270°) at 6 knots; JAX is VFR, wind from the west (260°) at 3 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: 68 flights in the DOT's last twelve reported months, the route's page.

The return flight

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 9W: thunderstorms (a convective SIGMET) up to 28,000 ft, moving from the southwest at 20 knots, until 8:55 pm PDT (03:55 UTC). Near the route, 269 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.
  • SIGMET 7W: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the southwest at 40 knots, until 8:55 pm PDT (03:55 UTC). Over the route from 338 to 458 nm out.
    as issued
    WSUS33 KKCI 120155
    MKCW WST 120155
    CONVECTIVE SIGMET 7W
    VALID UNTIL 0355Z
    NM AZ
    FROM 30NW SJN-30W TCS-60SE SSO-50SE TUS-70S INW-30NW SJN
    DMSHG AREA TS MOV FROM 23040KT. TOPS TO FL310.
  • SIGMET 6W: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 8:55 pm PDT (03:55 UTC). Over the route from 567 to 617 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.
  • AIRMET SIERRA 6E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 30 nm of the route.
  • AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the route from 20 to 110 nm out.
  • AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Near the route, 269 nm along the route.
  • AIRMET TANGO 2W: moderate turbulence above 18,000 ft from 35,000 ft to 45,000 ft. Over the route from 329 to 577 nm out.
  • AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 358 to 498 nm out.
  • AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 448 to 548 nm out.
  • AIRMET TANGO 6W: moderate turbulence above 18,000 ft from 28,000 ft to 40,000 ft. Over the route from 1553 to 1702 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 SAN.

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

  • B737 at 26,000 ft, 5 nm south, 4:19 pm PDT (23:19 UTC): moderate chop turbulence from 26,000 ft to 28,000 ft, remarks: ZTLFD-11. 1513 nm along the route, 5 nm south of the line.
    as filed, and in English
    GZH UA /OV MVC/TM 2319/FL260/TP B737/TB CONS MOD CHOP 260-280/RM ZTLFD-11
    Report
    a routine report filed through GZH
    Where
    over MVC
    Time
    23:19 UTC
    Height
    at 26,000 ft
    Aircraft
    B737
    Turbulence
    continuous moderate chop from 26,000 ft to 28,000 ft
    Remarks
    ZTLFD-11
  • B739 at 5,700 ft, 3 nm northwest, 7:07 pm PDT (02:07 UTC): overcast from 2,800 ft to 5,700 ft. At the departure end, 3 nm northwest of the line.
    as filed, and in English
    SAN UA /OV MZB/TM 0207/FL057/TP B739/SK OVC028-TOPS057
    Report
    a routine report filed through SAN
    Where
    over MZB
    Time
    02:07 UTC
    Height
    at 5,700 ft
    Aircraft
    B739
    Sky
    overcast from 2,800 ft, tops 5,700 ft
  • B739 at 2,700 ft, 0 nm northwest, 7:01 pm PDT (02:01 UTC): a broken layer above 2,700 ft, remarks: during the descent runway 27. At the departure end, 0 nm northwest of the line.
    as filed, and in English
    SAN UA /OV SAN/TM 0201/FL027/TP B739/SK BKN027/RM DURD RY27
    Report
    a routine report filed through SAN
    Where
    over SAN
    Time
    02:01 UTC
    Height
    at 2,700 ft
    Aircraft
    B739
    Sky
    a broken layer from 2,700 ft
    Remarks
    during the descent runway 27
  • E170 at 3,500 ft, 24 nm north, 6:59 pm PDT (01:59 UTC): remarks: B035. At the departure end, 24 nm north of the line.
    as filed, and in English
    CRQ UA /OV CRQ/TM 0159/FL035/TP E170/RM B035
    Report
    a routine report filed through CRQ
    Where
    over CRQ
    Time
    01:59 UTC
    Height
    at 3,500 ft
    Aircraft
    E170
    Remarks
    B035
  • E75L at 2,800 ft, 0 nm northwest, 6:05 pm PDT (01:05 UTC): a broken layer from 2,800 ft to 5,500 ft. At the departure end, 0 nm northwest of the line.
    as filed, and in English
    SAN UA /OV SAN/TM 0105/FL28/TP E75L/SK BKN028/TOP055
    Report
    a routine report filed through SAN
    Where
    over SAN
    Time
    01:05 UTC
    Height
    at 2,800 ft
    Aircraft
    E75L
    Sky
    a broken layer from 2,800 ft; TOP055
  • B737 at 2,700 ft, 0 nm northwest, 5:08 pm PDT (00:08 UTC): remarks: bases 2,700 ft tops 5,000 ft. At the departure end, 0 nm northwest of the line.
    as filed, and in English
    SAN UA /OV 3 MI WEST/TM 0008/FL027/TP B737/RM BASES 027 TOPS 050
    Report
    a routine report filed through SAN
    Where
    3 mi west
    Time
    00:08 UTC
    Height
    at 2,700 ft
    Aircraft
    B737
    Remarks
    bases 2,700 ft tops 5,000 ft
  • B39M at 3,400 ft, 0 nm northwest, 5:04 pm PDT (00:04 UTC): a broken layer from 3,400 ft to 4,000 ft, remarks: during the descent runway 27. At the departure end, 0 nm northwest of the line.
    as filed, and in English
    SAN UA /OV SAN/TM 0004/FL034/TP B39M/SK BKN034-TOP040/RM DURD RY27
    Report
    a routine report filed through SAN
    Where
    over SAN
    Time
    00:04 UTC
    Height
    at 3,400 ft
    Aircraft
    B39M
    Sky
    a broken layer from 3,400 ft, tops 4,000 ft
    Remarks
    during the descent runway 27
  • B737 at 2,700 ft, 0 nm northwest, 4:18 pm PDT (23:18 UTC): remarks: bases 2,700 ft tops 4,700 ft. At the departure end, 0 nm northwest of the line.
    as filed, and in English
    SAN UA /OV 2 MI WEST/TM 2318/FL027/TP B737/RM BASES 027 TOPS 047
    Report
    a routine report filed through SAN
    Where
    2 mi west
    Time
    23:18 UTC
    Height
    at 2,700 ft
    Aircraft
    B737
    Remarks
    bases 2,700 ft tops 4,700 ft
  • SR22 at 2,700 ft, 18 nm north, 7:02 pm PDT (02:02 UTC): overcast above 2,700 ft. At the departure end, 18 nm north of the line.
    as filed, and in English
    RNM UA /OV RNM270003/TM 0202/FL027/TP SR22/SK BASES OVC027
    Report
    a routine report filed through RNM
    Where
    3 nm west (270°) of RNM
    Time
    02:02 UTC
    Height
    at 2,700 ft
    Aircraft
    SR22
    Sky
    bases OVC027
  • C172 climbing, 5 nm north, 6:20 pm PDT (01:20 UTC): overcast from 3,000 ft to 6,200 ft. At the departure end, 5 nm north of the line.
    as filed, and in English
    SEE UA /OV 090003/TM 0120/FLDURC/TP C172/SK OVC030-TOP062
    Report
    a routine report filed through SEE
    Where
    wind from 090° at 3 knots
    Time
    01:20 UTC
    Height
    during the climb
    Aircraft
    C172
    Sky
    overcast from 3,000 ft, tops 6,200 ft
  • CL60 at 3,000 ft, 5 nm north, 5:22 pm PDT (00:22 UTC): remarks: bases 3,000 ft tops 5,500 ft. At the departure end, 5 nm north of the line.
    as filed, and in English
    SEE UA /OV 4 MI WEST/TM 0022/FL030/TP CL60/RM BASES 030 TOPS 055
    Report
    a routine report filed through SEE
    Where
    4 mi west
    Time
    00:22 UTC
    Height
    at 3,000 ft
    Aircraft
    CL60
    Remarks
    bases 3,000 ft tops 5,500 ft
  • CRJ7 at 15,000 ft, 17 nm north, 6:55 pm PDT (01:55 UTC): light rime icing, -3 °C, remarks: during the descent at 15,000 ft at 13,500 ft. 219 nm along the route, 17 nm north of the line.
    as filed, and in English
    PHX UA /OV GEELA/TM 0155/FL150/TP CRJ7/TA -3/IC LT RIME/RM DURD 150 135
    Report
    a routine report filed through PHX
    Where
    geela
    Time
    01:55 UTC
    Height
    at 15,000 ft
    Aircraft
    CRJ7
    Temperature
    -3
    Icing
    lt rime
    Remarks
    during the descent at 15,000 ft at 13,500 ft
  • B739 at 36,000 ft, 3 nm east, 4:44 pm PDT (23:44 UTC): light chop turbulence. 1652 nm along the route, 3 nm east of the line.
    as filed, and in English
    TLH UA /OV TLH345045/TM 2344/FL360/TP B739/TB CONS LGT CHOP
    Report
    a routine report filed through TLH
    Where
    45 nm north (345°) of TLH
    Time
    23:44 UTC
    Height
    at 36,000 ft
    Aircraft
    B739
    Turbulence
    continuous light chop
  • B747 at 33,000 ft, 13 nm south, 6:02 pm PDT (01:02 UTC): no turbulence. 1672 nm along the route, 13 nm south of the line.
    as filed, and in English
    TLH UA /OV TLH360025/TM 0102/FL330/TP B747/TB NEG
    Report
    a routine report filed through TLH
    Where
    25 nm north (360°) of TLH
    Time
    01:02 UTC
    Height
    at 33,000 ft
    Aircraft
    B747
    Turbulence
    none

6 more routine reports are on the map.

Winds aloft along the route, and the time en route the forecast for use 20:00–03:00 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 15 forecast points nearest it (SAN, BLH, PHX, TUS, ELP, ROW, LBB, ABI, DAL, SHV, JAN, MOB, MGM, TLH, JAX). A plus sign is a headwind, a minus sign a tailwind.

HeightAverage windHead- or tailwindTemperatureGround speedTime en routeArrival
3,500 ft240° at 10 kt−9 kt129 kt14 h 03 min12:18 pm EDT (16:18 UTC)
5,500 ft220° at 12 kt−9 kt17 °C129 kt14 h 03 min12:18 pm EDT (16:18 UTC)
7,500 ft230° at 14 kt−12 kt13 °C132 kt13 h 44 min11:59 am EDT (15:59 UTC)
9,500 ft240° at 17 kt−15 kt10 °C135 kt13 h 25 min11:40 am EDT (15:40 UTC)
11,500 ft240° at 20 kt−17 kt7 °C137 kt13 h 14 min11:29 am EDT (15:29 UTC)
13,500 ft240° at 22 kt−19 kt3 °C139 kt13 h 02 min11:17 am EDT (15:17 UTC)
15,500 ft240° at 24 kt−21 kt-1 °C141 kt12 h 51 min11:06 am EDT (15:06 UTC)
17,500 ft240° at 26 kt−23 kt-5 °C143 kt12 h 40 min10:55 am EDT (14:55 UTC)
18,000 ft FL180240° at 26 kt−23 kt-6 °C143 kt12 h 40 min10:55 am EDT (14:55 UTC)
24,000 ft FL240240° at 34 kt−31 kt-17 °C151 kt12 h10:15 am EDT (14:15 UTC)
30,000 ft FL300250° at 42 kt−39 kt-29 °C159 kt11 h 24 min9:39 am EDT (13:39 UTC)
34,000 ft FL340250° at 43 kt−41 kt-39 °C161 kt11 h 15 min9:30 am EDT (13:30 UTC)
39,000 ft FL390260° at 40 kt−40 kt-50 °C160 kt11 h 20 min9:35 am EDT (13:35 UTC)

Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 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
PointFrom3,0006,0009,00012,00018,00024,00030,00034,00039,000
SANused from 0 nm out; 25 nm from the line200/10240/19 9°240/27 5°230/22 -1°220/40 -10°220/49 -19°220/54 -29°220/61 -35°220/56 -44°
BLHused from 50 nm out; 69 nm from the line230/22210/24 11°230/23 5°230/26 0°220/38 -10°230/52 -19°220/58 -28°220/69 -34°220/59 -45°
PHXused from 199 nm out; 45 nm from the line210/19210/20 14°200/20 6°210/40 1°220/58 -8°220/68 -20°220/82 -26°230/83 -34°230/69 -46°
TUSused from 299 nm out; 58 nm from the line220/17 15°210/32 7°210/43 5°210/49 -7°220/64 -18°220/83 -26°230/81 -36°230/72 -48°
ELPused from 448 nm out; 108 nm from the line200/15200/16 15°200/17 6°220/40 -6°240/53 -16°230/62 -27°240/63 -38°250/59 -49°
ROWused from 548 nm out; 66 nm from the line180/23190/24 15°210/27 7°230/35 -6°240/53 -17°240/62 -27°250/64 -38°260/60 -50°
LBBused from 697 nm out; 64 nm from the line180/26 20°210/21 13°230/21 7°250/25 -5°250/34 -16°250/52 -28°260/47 -38°260/49 -50°
ABIused from 846 nm out; 32 nm from the line180/26 17°220/18 12°230/25 8°230/28 -5°240/29 -14°250/35 -28°270/37 -39°280/37 -51°
DALused from 946 nm out; 55 nm from the line180/21190/24 15°230/20 12°220/23 8°240/22 -5°230/18 -15°280/33 -29°280/36 -39°300/33 -52°
SHVused from 1095 nm out; 60 nm from the line190/11230/19 17°230/26 12°260/15 7°280/16 -4°300/17 -15°300/34 -30°300/31 -41°310/42 -52°
JANused from 1294 nm out; 54 nm from the line260/6310/14 17°280/13 12°290/19 6°310/22 -5°310/28 -17°320/44 -32°330/48 -41°320/52 -51°
MOBused from 1443 nm out; 59 nm from the line310/7350/18 18°330/16 12°300/18 7°320/17 -6°330/27 -17°340/52 -33°350/53 -43°330/38 -50°
MGMused from 1493 nm out; 64 nm from the line300/16330/30 16°330/34 11°320/31 7°310/28 -7°320/29 -17°290/25 -34°300/28 -41°320/28 -50°
TLHused from 1593 nm out; 71 nm from the line300/17340/32 17°320/27 13°300/27 8°280/23 -7°250/37 -17°230/44 -33°220/53 -41°220/48 -51°
JAXused from 1742 nm out; 45 nm from the line280/14300/22 16°260/27 15°260/26 9°240/41 -6°230/38 -16°220/44 -32°200/49 -41°200/52 -53°

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

AirportWhereConditionsWindVisibilityCeilingElevationReported
SAN San Diego, CA departure VFR Sky: a broken layer at 3,100 feet, overcast at 5,000 feet from the west (270°) at 6 knots 10+ mi 3,100 ft 16 ft 6:51 pm PDT (01:51 UTC)
NYL Yuma, AZ 129 nm out, 15 nm south of the line, tower VFR from the north-northwest (340°) at 6 knots 10+ mi none 213 ft 01:57 UTC
CHD Chandler, AZ 269 nm out, 14 nm north of the line, tower VFR Sky: scattered clouds at 8,000 feet, a broken layer at 10,000 feet from the west (280°) at 7 knots 10+ mi 10,000 ft 1,243 ft 01:47 UTC
TCS Truth Or Consequences, NM 498 nm out, 7 nm north of the line VFR Sky: a broken layer at 10,000 feet from the east-southeast (120°) at 7 knots 10+ mi 10,000 ft 4,861 ft 01:53 UTC
ROW Roswell, NM 637 nm out, 12 nm north of the line, tower VFR from the south-southeast (150°) at 7 knots 10+ mi none 3,671 ft 01:51 UTC
BFE Brownfield, TX 757 nm out, 9 nm north of the line no report just now 3,264 ft
RBD Dallas, TX 1025 nm out, 1 nm south of the line, tower VFR from the south-southeast (160°) at 10 knots 10+ mi none 660 ft 01:53 UTC
SHV Shreveport, LA 1175 nm out, 5 nm east of the line, tower VFR Sky: scattered clouds at 30,000 feet from the south (180°) at 4 knots 10+ mi none 257 ft 01:56 UTC
JAN Jackson, MS 1374 nm out, 22 nm north of the line, tower VFR calm 10+ mi none 346 ft 01:54 UTC
DHN Dothan, AL 1613 nm out, 6 nm north of the line, tower VFR from the west-southwest (250°) at 3 knots 10+ mi none 400 ft 23:55 UTC
VLD Valdosta, GA 1732 nm out, 5 nm west of the line, tower VFR calm 10+ mi none 203 ft 01:53 UTC
JAX Jacksonville, FL destination VFR Sky: scattered clouds at 20,000 feet from the west (260°) at 3 knots 10+ mi none 29 ft 9:56 pm EDT (01:56 UTC)

The highest airport on this list sits at 4,861 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At JAX when you get there the forecast at the estimated arrival, 9:30 am EDT (13:30 UTC)

Wind from the west at 5 knots, visibility more than 6 miles, a few clouds at 15,000 feet, scattered clouds at 25,000 feet VFR

The whole forecast for JAX
  • From Sun 8:00 pm EDT (00:00 UTC): wind from the west at 5 knots, visibility more than 6 miles, a few clouds at 15,000 feet, scattered clouds at 25,000 feet
  • From Mon 10:00 am EDT (14:00 UTC): wind from the northwest at 11 knots, gusting to 17, visibility more than 6 miles, a few clouds at 3,500 feet
  • From Mon 6:00 pm EDT (22:00 UTC): wind from the north-northwest at 6 knots, visibility more than 6 miles, clear skies
The forecast for SAN, the departure
  • From Sun 5:00 pm PDT (00:00 UTC): wind from the southwest at 11 knots, visibility more than 6 miles, scattered clouds at 2,800 feet, a broken layer at 3,500 feet and more above
  • From Sun 8:00 pm PDT (03:00 UTC): wind from the south-southwest at 7 knots, visibility more than 6 miles, a few clouds at 2,500 feet, a broken layer at 3,500 feet
  • From Sun 11:00 pm PDT (06:00 UTC): wind from the southwest at 6 knots, visibility more than 6 miles, showers nearby, scattered clouds at 2,500 feet, a broken layer at 3,500 feet
  • From Mon 12:00 pm PDT (19:00 UTC): wind from the west-southwest at 10 knots, gusting to 17, visibility more than 6 miles, a few clouds at 2,500 feet, a broken layer at 5,000 feet
  • From Mon 5:00 pm PDT (00:00 UTC): wind from the west-southwest at 8 knots, visibility more than 6 miles, a broken layer at 5,000 feet

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

  • 6/4812 El Centro, CA, Wednesday, July 15, 2026 through Tuesday, July 13, 2027 Local 12 nm from the route, at the departure end · security · until 13 July · ZLA
  • 6/2652 Coyote Wells, CA, Saturday, July 4, 2026 through Saturday, January 2, 2027 Local 11 nm from the route, 80 nm along the route · security · until 2 January · ZLA
  • 6/2656 Coyote Wells, CA, Saturday, July 4, 2026 through Saturday, January 2, 2027 Local 10 nm from the route, 119 nm along the route · security · until 2 January · ZLA
  • 6/2657 Calexico, CA, Saturday, July 4, 2026 through Saturday, January 2, 2027 Local 10 nm from the route, 119 nm along the route · security · until 2 January · ZLA
  • 6/8722 ALAMOGORDO, NM, Tuesday, October 13, 2026 Local on the route, 567 nm along the route · security · starts tomorrow · ZAB
  • 6/8646 Arlington, TX, Thursday, October 15, 2026 through Friday, October 16, 2026 UTC 2 nm from the route, 1015 nm along the route · drones kept away from a public gathering · starts Thursday 15 October · ZFW
  • 9/2934 DALLAS, TX 11 nm from the route, 1025 nm along the route · a VIP movement · ZFW
  • 6/8389 Jacksonville, FL, Thursday, October 15, 2026 through Sunday, October 18, 2026 UTC 11 nm from the route, at the destination end · air shows/sports · starts Thursday 15 October · ZJX

Daylight

Sunset at SAN 6:19 pm PDT (01:19 UTC), at JAX 6:59 pm EDT (22:59 UTC) (civil twilight ends 7:23 pm EDT (23:23 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 Southwest
Radar now, the Pacific Southwest · loop National Weather Service
Radar now, the southern Rockies
Radar now, the southern Rockies · loop National Weather Service
Radar now, the southern Plains
Radar now, the southern Plains · loop National Weather Service
Radar, the whole country
Radar, the whole country · loop National Weather Service
Surface analysis now
Surface analysis now Weather Prediction Center
Forecast chart, 12 hours ahead
Forecast chart, 12 hours ahead Weather Prediction Center
Forecast chart, 24 hours ahead
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: San Diego International, Jacksonville International.