Flying has a way of making you feel like a sardine, but economy looks a lot less cramped when all the seats are removed and replaced with clusters of couches. Boeing has been customizing planes for billionaires since the late 90s, with lavish bedrooms, full baths, and 20-person sofas. 737s sell for about $80 million, and A380s closer to $300 million.
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(Image credits: Boeing)