The most expensive form of transportation by a massive margin is space travel, specifically orbital and suborbital flights. While a first-class airplane ticket might cost several dollars per mile, the cost of sending a human into space is measured in the millions. For example, a seat on a SpaceX Dragon capsule to the International Space Station (ISS) costs roughly $55 million, while suborbital hops on Blue Origin or Virgin Galactic currently range from $450,000 to $600,000 for just a few minutes of weightlessness. Even on Earth, high-end private jet charters can cost upwards of $20,000 per flight hour, and specialized transport like "supersized" heavy-lift vessels for moving oil rigs can cost hundreds of thousands per day. However, in terms of the cost to move a single person one mile, nothing compares to the astronomical energy and engineering requirements of leaving the Earth's atmosphere.