Antipode of San Antonio, Puerto Rico
The opposite side of the world to San Antonio is Onslow, Western Australia, Australia.
San Antonio
Puerto Rico
Continent: America
Coordinates: 18.449, -66.303
Antipodal point
Indian Ocean
Exact location on the other side of the world
Coordinates: -18.449, 113.697
Onslow
Australia
Onslow is the closest city to San Antonio's antipodal point (383 km).
The antipodal city to San Antonio is Onslow. This means that, among all the populated locations in the world, the farthest city from San Antonio is Onslow.
The distance from San Antonio to Onslow is about 20,000 kilometers. A direct flight would take around 22 hours, but there aren't commercial routes between these cities.
Cities on the other side of the world of San Antonio
This table contains the populated locations that are closest to San Antonio's antipode. These are the farthest cities in the world from San Antonio.
| City | Country | Distance from antipode | Coordinates |
|---|---|---|---|
| Onslow, WA | Australia | 383 km | (-21.638, 115.112) |
| North West Cape, WA | Australia | 387 km | (-21.926, 114.030) |
| Exmouth, WA | Australia | 388 km | (-21.931, 114.121) |
| Dampier, WA | Australia | 400 km | (-20.663, 116.713) |
| Nickol, WA | Australia | 413 km | (-20.746, 116.795) |
| Baynton, WA | Australia | 414 km | (-20.752, 116.801) |
| Millars Well, WA | Australia | 414 km | (-20.742, 116.817) |
| Pegs Creek, WA | Australia | 415 km | (-20.738, 116.833) |
| Karratha, WA | Australia | 416 km | (-20.738, 116.846) |
| Bulgarra, WA | Australia | 416 km | (-20.726, 116.857) |
Local time:
Time Zone: America/Puerto_Rico
Coordinates: 18.4488° N 66.3027° W
Elevation: 7 m (23 ft)
Local time:
Time Zone: Australia/Perth
Coordinates: 21.6376° S 115.1122° E
Elevation: 7 m (23 ft)
How to calculate the antipodal point?
The antipode can be calculated by understanding the geographic coordinates and applying simple formulas. We will use the following variables:
- LatO: Latitude at the origin point.
- LngO: Longitude at the origin point.
- LatA: Latitude at the antipodal point.
- LngA: Longitude at the antipodal point.
Step 1: Obtain the geographic coordinates of San Antonio
The DMS coordinates are: 18°26'55.8'' N 66°18'9.6'' W.
Calculations are easier by using the decimal format, hence:
LatO = 18.44884°
LngO = -66.30267°
Step 2: Calculate the latitude
LatA = - LatO = -18.44884°
Since the latitude is positive (north direction), the antipode must be negative (south direction).
Step 3: Calculate the longitude
LngA = LngO ± 180° = -66.30267 + 180° = 113.69733°
Since the longitude is negative, we sum 180° to ensure the final value lies between (-180, 180). If it were the other way around, we would subtract 180° for the same reason.
Result:
The antipode of San Antonio is located on coordinates: (LatA, LngA) = (-18.44884, 113.69733)
In DMS format: 18°26'55.8'' N 66°18'9.6'' W.