Fly, and fly again: Private astronauts take to the skies on Zero-G training flights

four people floating in a plane
The billionaire-funded Inspiration4 crew, which used a SpaceX Crew Dragon for three days in 2021, enjoys a brief spurt of weightlessness during a Zero-G flight in 2021. From left: Jared Isaacman, Chris Sembroski, Hayley Arceneaux and Sian Proctor. Arceneaux, a childhood cancer survivor, was first person to fly into space with a prosthesis and Proctor was the first female Black astronaut pilot. (Image credit: Inspiration4 / John Kraus)

For many private astronauts, the final frontier begins with a parabolic flight in an airplane.

The new CEO of Zero Gravity Corp. (Zero-G), Allison Odyssey, says the company is seeing a surge of demand from just about every private vendor looking to bring people to space. SpaceX has already publicized their work; others are doing it more behind the scenes.

Experiencing bursts of microgravity aboard the company's modified Boeing 727 allows people new to space to "build their confidence and experience microgravity and just feel a little bit more prepared" when flight day arrives, Odyssey told

"I think we can develop even more in partnership with those companies, depending on what they find important to have their their astronauts prepared to do," added Odyssey on Wednesday (April 19), two days after her CEO promotion was announced. "It's an exciting thing that we're doing, and we get to be a part of."

Related: Zero-G flight for disability ambassadors shows space is accessible for all

Zero-G was founded in 2004 and is most famous for taking customers on flights on its modified 727, which typically consist of 15 or more parabolas high in the sky. If you can afford the $9,000 or more for a ticket, you will experience weightlessness for roughly 20 to 30 seconds at a time each parabola. 

Even with tickets that high, there's still plenty of consumer demand for Zero-G flights; that ticket is far more affordable than the $450,000 a Virgin Galactic customer would spend for a suborbital flight. But aside from tourism, what Zero-G is also seeing now is a surge in requests for custom flights for private astronauts, along with research needs.

The suborbital economy is growing quickly. It's not just SpaceX sending satellites up every week or so  —   there's also a few private space missions a year and a host of forecasted research flights as well. (This is pending the availability of flights aboard Blue Origin, which is recovering from an uncrewed anomaly last year, along with Virgin Galactic's wait to complete complex fleet upgrades. But both may fly again in 2023.)

Related: Space tourism took a giant leap in 2021: Here's 10 milestones from the year

Virgin Galactic founder Richard Branson soars like Superman while in weightlessness during his Unity 22 launch on the SpaceShipTwo VSS Unity on July 11, 2021. Zero-G Corp. offers bursts of weightlessness for 20 to 30 seconds at a time aboard parabolic flights. (Image credit: Virgin Galactic)

Odyssey, who was an original Zero-G employee and who returned to the organization in 2020 after a few years elsewhere, said she's excited to see how their unique market niche can help such customers in the years to come. 

Parabolic flights can be customized for moon gravity or Mars gravity, for example. That means Zero-G could potentially help with NASA's Artemis program aiming to return humans to the surface in 2025 or so, with a suite of modern-day scientific hardware.

Testing experiments before leaving Earth is a boon, Odyssey emphasized. "They're able to bring a team and bring their experiments," she said. "They can have 10 or 12 iterations of the same experiment within a few days, which is really valuable. They also have the ability to (modify a) parabola; we'll do sets of five for example, and then we'll do a straight and level (flight) so they can have about five minutes in between to make adjustments when sometimes things fail."

The company is in a growth phase, including bringing on a second plane and crew to allow for service on both coasts of the U.S. regularly. A forthcoming new booking site will allow for different kinds of customers for research, consumer or charter (private astronauts). Further in the future will be a third aircraft, probably of a different airframe type to allow for a wider scope of research.

In the near-term, consumers and researchers alike can look forward to flights at the NASA Kennedy Space Center's old space shuttle runway, allowing folks to enjoy a few sights of space history and of SpaceX pads in between parabolas. The place is a fast-growing hub of space industry as well, allowing for door-to-door scientific access.

Related: NASA's space shuttles: Where are they now?

"From a consumer standpoint, even just being out in the runway is cool," Odyssey said. "And part of the vision is to build out this facility so that we can do research there, have a place for the researchers to work on their experiments."

Odyssey, who was most recently the chief operating officer at Zero-G, said she is looking forward as CEO to bringing that operations experience to the company's top tier to assist with flight certifications — and with helping other employees grow their careers. 

Odyssey also still pops on parabolic flights from time to time to ensure the clients are getting what they need. As for how many floating excursions she's had? "I have stopped counting," she said with a laugh.

Elizabeth Howell is the co-author of "Why Am I Taller?" (ECW Press, 2022; with Canadian astronaut Dave Williams), a book about space medicine. Follow her on Twitter @howellspace. Follow us on Twitter @Spacedotcom or Facebook.

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Elizabeth Howell
Staff Writer, Spaceflight

Elizabeth Howell (she/her), Ph.D., is a staff writer in the spaceflight channel since 2022 covering diversity, education and gaming as well. She was contributing writer for for 10 years before joining full-time. Elizabeth's reporting includes multiple exclusives with the White House and Office of the Vice-President of the United States, an exclusive conversation with aspiring space tourist (and NSYNC bassist) Lance Bass, speaking several times with the International Space Station, witnessing five human spaceflight launches on two continents, flying parabolic, working inside a spacesuit, and participating in a simulated Mars mission. Her latest book, "Why Am I Taller?", is co-written with astronaut Dave Williams. Elizabeth holds a Ph.D. and M.Sc. in Space Studies from the University of North Dakota, a Bachelor of Journalism from Canada's Carleton University and a Bachelor of History from Canada's Athabasca University. Elizabeth is also a post-secondary instructor in communications and science at several institutions since 2015; her experience includes developing and teaching an astronomy course at Canada's Algonquin College (with Indigenous content as well) to more than 1,000 students since 2020. Elizabeth first got interested in space after watching the movie Apollo 13 in 1996, and still wants to be an astronaut someday. Mastodon: