NASA said June 14 that the Boeing Starliner and its crew will now return to Earth from the International Space Station no earlier than Saturday, June 22.

"The extra time allows the team to finalize departure planning and operations while the spacecraft remains cleared for crew emergency return scenarios within the flight rules," NASA said on its Kennedy Space Center blog.

The Starliner's test mission launched on June 5 from KSC with astronauts Butch Whitmore and Suni Williams. During its journey to the ISS, helium leaks were found in the spacecraft's thruster system.

Earlier in the week, NASA said its teams were continuing to assess what impacts, if any, the five small helium leaks would have on Whitmore's and Williams' return to Earth. At that time, the space agency scheduled Starliner's return for Tuesday, June 18, "pending weather and spacecraft readiness."

NASA has said that engineers had determined the helium leaks shouldn't impact Starliner's return. The agency said the craft had enough helium for 70 hours of free flight time when only seven hours would be required as part of its journey home.