They're $125,000 apiece. Space Perspective's "Neptune One" balloon-borne test vehicle took this photo from an altitude of about 100,000 feet (30,000 meters) during the company's first test flight, on June 18, 2021. (Image credit: Space Perspective) You can now book a seat on a balloon ride to the stratosphere — if you've got pretty deep pockets. Florida-based company Space Perspective has started accepting seat reservations for its "Spaceship Neptune," a balloon-borne pressurized capsule designed to carry eight passengers and one pilot to an altitude of 100,000 feet (30,000 meters). The price: $125,000 per seat. Spaceship Neptune passengers will spend about six hours aboard the capsule during their flights, which will take them above 99% of