The calculated distance (air line) between Guatemala and El Salvador is approximately 164 miles respectively 264 kilometers.
By car or train, the actual journey to El Salvador is certainly longer, as only the direct route (as the crow flies) between Guatemala and El Salvador has been calculated here.
The center of the country is used to calculate the distance. For a more precise determination of the distance, please use one (or better yet two) cities for the distance calculation.
Air line (approximately)
264 kilometers
142 nautical miles