Dream Chaser slips to late 2026

Sierra Space’s Dream Chaser spaceplane is now tracking to no earlier than late 2026 for its first mission, extending a schedule that had already moved off earlier International Space Station cargo plans. NASA and Sierra Space said in September 2025 that they had modified the company’s Commercial Resupply Services contract so Dream Chaser would first fly a free-flight demonstration targeted in late 2026, rather than proceed directly to an ISS cargo run. Sierra Space said at the time the timing was set to align with expected launch vehicle availability, and later said the vehicle remained on track for a fourth-quarter 2026 launch. ULA’s mission listings show Vulcan flights for national security and other customers ahead of any publicly posted Dream Chaser launch. ### Why did the first flight move again? The Orlando Sentinel reported on August 5 that the first Dream Chaser ISS mission had slipped because United Launch Alliance needed additional Vulcan Centaur hardware and because two U.S. Space Force missions took priority on the manifest. The paper said the mission is now listed no earlier than late 2026 while Vulcan vehicle availability is worked through. (nasa.gov) September 25, 2025 was the date NASA publicly reset the program’s near-term plan. NASA said then that, after a joint review, Sierra Space had determined Dream Chaser development was best served by a free-flight demonstration targeted in late 2026, with NASA providing minimal support through the rest of development and the demo flight. (tech.yahoo.com) ### What exactly is flying in late 2026 now? NASA said the first mission under the revised arrangement is a demonstration flight, not an operational ISS cargo delivery. The agency also said the previous contractual requirement that NASA buy seven cargo flights was removed, though NASA can still order Dream Chaser resupply missions later if the demonstration is successful, according to contemporaneous reporting by the Orlando Sentinel and SpacePolicyOnline. (nasa.gov) Sierra Space said the late-2026 mission is intended to demonstrate capabilities relevant to both ISS resupply and future commercial low-Earth-orbit destinations. The company said Dream Chaser is being positioned for broader civil, commercial and national security uses, while keeping first-flight readiness as the immediate priority. (nasa.gov) ### How much of this is about Vulcan rather than Dream Chaser? ULA completed the second of the two certification flights required for Vulcan’s U.S. Space Force certification process on October 4, 2024, according to the company’s mission page. But certification flight completion did not by itself create immediate spare launch capacity for every customer, and ULA’s public mission listings show national security launches such as USSF-106 in August 2025 and USSF-87 in February 2026 already occupying Vulcan slots. (sierraspace.com) Richard Tribou of the Orlando Sentinel reported in September 2025 that Dream Chaser’s first launch had also been pushed behind priority national security missions on ULA’s growing manifest. SpacePolicyOnline separately reported that ULA President Tory Bruno said Sierra Space had purchased six Vulcan launches for Dream Chaser, but that the company would launch it when ready. (ulalaunch.com) ### What has Sierra Space finished on the spacecraft itself? April 14, 2026 was the date Sierra Space said Dream Chaser vehicle Tenacity completed launch acoustic testing at NASA’s Kennedy Space Center and returned to Louisville, Colorado. The company described that as a pre-flight milestone and said the spacecraft was on track for a low-Earth-orbit demonstration mission targeted in the fourth quarter of 2026, with landing planned at Vandenberg Space Force Base. (tech.yahoo.com) Sierra Space’s product page says the uncrewed Dream Chaser and its Shooting Star cargo module are designed to deliver more than 6 tons of pressurized and unpressurized payloads to the ISS, with runway landings and reuse across multiple missions. Those capabilities remain part of the company’s pitch even as the first mission has shifted to a demonstration profile. (sierraspace.com) ### What should readers watch next? Late 2026 is the current public target window cited by NASA and Sierra Space for Dream Chaser’s first flight. The next concrete markers are likely to appear on ULA’s mission manifest, Sierra Space flight-readiness updates, and any NASA announcements tied to the demonstration mission’s final profile and launch date. (nasa.gov) (sierraspace.com)