Axiom 4, the privately operated crewed spaceflight, now has a confirmed launch date of June 22, 2025. The mission is slated to lift off at 3:42 AM ET, from Launch Complex 39A at the Kennedy Space Center.
Originally scheduled for June 19, the flight window was pushed back as engineers addressed technical issues and concerns about the ISS leaks. The new timeline promises a mission duration ranging from 14 to 21 days to complete its planned research program.
“No one remembers launch delays, but no one ever forgets a real problem.”
–V.L. Pinson Sr., former ABMA and NASA veteran
The mission will utilize a Falcon 9 to carry the newly built Crew Dragon spacecraft C213 into low Earth orbit, marking the final Crew Dragon capsule to enter service in SpaceX’s original slate of capsules. The four-person crew—veteran astronaut Peggy Whitson commanding, Indian pilot Shubhanshu Shukla, ESA’s Sławosz Uznański-Wiśniewski, and Hungarian specialist Tibor Kapu—will conduct science and technology demonstrations aboard ISS during their flight.
Axiom Space first announced on April 3 that Ax-4 would launch no earlier than May, reflecting a cautious approach as technical reviews and ISS scheduling took shape.
By mid-April, the Ax-4 team was gearing up for a busy agenda aboard ISS with a target window of no earlier than late May. The packed schedule—includes biological experiments, materials science tests, and station maintenance tasks.
After some shifts to the right on the schedule, the mission stood ready to launch on June 10th, but weather in the ascent corridor forced mission managers to call of any launch attempt that day. The ascent corridor is the zone where Crew Dragon and its crew would land in the unlikely event of an abort. The zone extends offshore in the Atlantic Ocean from Kennedy Space all the way to Ireland, and weather inside it must be suitable — just in case.
The next day, the first launch attempt on June 11 was scrubbed after engineers detected a propellant leak in the rocket’s liquid oxygen system and called off the launch to remediate the issue.
Next, a pressure leak in the Zvezda service module on the ISS prompted NASA and Roscosmos to stabilize the module before approving further dockings, contributing to another postponement announced on June 12.
NASA, SpaceX and Axiom have now agreed on a launch attempt in the predawn hours of the first full day of summer: June 22nd. Falcon 9’s leaks have been resolved, the Space Station leak issue is now under control, and at this point, weather on the 22nd looks as though it will be acceptable for Axiom 4’s ascent into orbit.
The Indian Connection
For India’s space program, Ax-4 represents a milestone: it provides the first opportunity for an Indian astronaut to fly to ISS. Pilot and Indian Air Force Group Captain Shubhanshu “Shux” Shukla, part of ISRO’s cadre of astronauts, will carry out experiments developed by the Indian Space Research Organisation in fields ranging from microbial adaptation to muscle atrophy studies.
His flight will be the precursor to his upcoming flight aboard ISRO’s Gaganyaan-1, India’s first domestically built crewed orbital spacecraft. At 39, Shukla is a veteran test pilot, having flown everything from MiG-21s to Su-30s.
Photo: ISRO
One Of America’s Most Astronauts Commands
Axiom 4 will be commanded by Peggy Whitson—a former NASA chief astronaut and current Director of Human Spaceflight at Axiom Space—Ax-4 brings seasoned leadership to this venture. Whitson holds multiple Station records and is tasked with overseeing the flights to and from ISS. She has spent 665 days in space so far.
Poland and Hungary Returning To Spaceflight After 40 Years
Joining Whitson and Shukla is Sławosz Uznański, a Polish engineer and the first representative of his country in space since 1978. Back then, it was Mirosław Hermaszewski aboard a Soviet Soyuz. This time, it’s Uznański flying under the banner of the European Space Agency as a mission specialist. A former CERN engineer and ESA reserve astronaut, Uznański’s path to space was defined more by science than by spectacle. His role on Ax-4 emphasizes research, including a number of biomedical and Earth-monitoring experiments designed by Polish institutions.
Hungary, too, is returning to space after a four-decade absence. Tibor Kapu, an engineer selected under the Hungarian government’s HUNOR program, became only the second Hungarian to ever fly in space. He beat out nearly 250 applicants for the role. The first, Bertalan Farkas, flew aboard a Soviet Soyuz spacecraft in 1980.
Kapu’s mission is both technical and symbolic. “This is not just a mission for Hungary,” he said before launch. “It’s for all the small nations looking toward the stars and asking if they can be part of the next chapter.”