Well, you can get a boarding pass for a trek to the Red Planet, but only your name will make the trip.
Although it will be years before the first humans set foot on Mars, the USA space agency has invited public to submit their names to fly overseas the next rover to Red Planet in 2020.
The opportunity to send your name to Mars comes with a souvenir boarding pass and "frequent flyer" points.
The 2020 rover will search for signs of past microbial life on Mars, study the planet's climate and geology, and collect samples of rock and soil.
The last date to submit your name is September 30.
NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California would use an electron beam to stencil the submitted names onto a silicon chip. The chips will ride on the rover under a glass cover.
"It's an exciting time for NASA", Zurbuchen said, "as we embark on this voyage to answer profound questions about our neighboring planet, and even the origins of life itself".
As it does with many of its exploratory missions, the space agency will include the names of space fans onboard the new Mars rover, due to depart Earth in July next year.
Miles are awarded for each "flight", with corresponding digital mission patches available for download. Each line of text is smaller than one-thousandth the width of a human hair, making room for more than a million names on a single dime-sized chip.
More than 2.4 million names were included on two chips placed onboard the InSight lander, which touched down on Mars in November a year ago.
And similarly, more than two million names were sent to Mars onboard the NASA InSight mission in May 2018.
NASA says the Mars 2020 rover will look to land in the Jezero Crater, which is located on the western edge of a giant impact basin north of the Martian equator.