Jeff Bezos plans to travel to space next month as part of the first crew carried by Blue Origin, the Amazon.com Inc. founder’s space company. Mr. Bezos stated in an Instagram post-Monday that he will be one of the first passengers on Blue Origin’s New Shepard spacecraft, during the initial crewed flight scheduled for launch from West Texas on July 20. Mr. Bezos, 57 years old, stated that his brother, Mark Bezos, will also be on board.Blue Origin and Richard Branson’s Virgin Galactic Holdings Inc. are competing in the emerging market for suborbital travel. After years of delays, the two companies are promising passengers a short joy ride for prices expected to be less than $500,000, based on prior comments from virgin executives. Mr. Branson plans to join Virgin Galactic’s third crewed test flight later this year. Blue Origin’s New Shepard has made 15 uncrewed test flights, which the company stated demonstrates the mission’s safety. Most commercial aircraft don’t carry passengers before undergoing an intensive series of hundreds of piloted flights.