Many sailors have reported spiders being caught in their ship's sails over 1,000 miles (1,600 km)
[18] from land (Heimer 1988). They have even been detected in atmospheric data balloons collecting air samples at slightly less than 5 kilometers (16,000 ft) above sea level.
[19] Evidently, ballooning is the most common way for spiders to invade isolated islands and mountaintops.
[18][20] Spiderlings are known to survive without food while travelling in air currents of jet streams for 25 days or longer.
[5]