Vast Haven-1 Launch Slips to Q1 2027 as Commercial Station Race Tightens

Photo by Bill Jelen on Unsplash

Vast has slipped its Haven-1 space station launch from May 2026 to no earlier than the first quarter of 2027, a roughly nine-month delay that still leaves the Los Angeles startup positioned to fly the first commercial space station ahead of Axiom Space, Starlab, and Blue Origin's Orbital Reef. The company confirmed the new target on January 20, 2026, the same day it announced Haven-1 had entered clean-room integration. According to Aviation Week, Vast framed the slip as a milestone-driven schedule update rather than a hardware setback.

The revised date now appears on Vast's own product page, which lists Haven-1 as "Launching 2027" alongside the station's headline specs: 4.4 meters in diameter, 10.1 meters long, 45 cubic meters of habitable volume, and a 14,600 kg launch mass. That figure is consistent with the Wikipedia entry's 14,000 kg estimate, which also notes Haven-1 will become the heaviest spacecraft ever lifted to orbit by a Falcon 9.

What Vast actually announced

The delay was bundled with a progress update rather than a problem disclosure. Payload reported that Vast has begun the first of three integration phases, starting with thermal control and life support installation, followed by avionics and navigation, then crew habitation fittings and micrometeoroid shielding. Vast told Payload it expects to complete all three phases and finish environmental testing within 2026.

That sequencing matters because the station's hull was only finished welding on October 8, 2025, per Wikipedia. Going from a welded primary structure to a flight-ready, human-rated pressure vessel in roughly 14 months was always aggressive. The new Q1 2027 date pushes that integration window out to about 18 months, which is closer to historical norms for crewed hardware.

How the Vast Space commercial space station compares to its rivals

Haven-1 is small. It is a single module with about 45 cubic meters of habitable volume, which BBC Science Focus likened to the interior of a small tour bus. It is designed for four crew at a time, with stays of 10 to 30 days, supported by an open-loop life support architecture closer to the Space Shuttle than to the ISS's closed-loop recycler.

Its competitors are aiming bigger and later. Payload's reporting on the race places Axiom Space's two-module station debut in 2028 and Voyager's Starlab in 2029, with Blue Origin and Sierra Space's Orbital Reef also in contention. If Vast's January 2027 date holds, Haven-1 will reach orbit at least a year before any rival outpost, even though it would also be the smallest of the bunch.

That positioning is deliberate. BBC Science Focus quoted Vast CEO Max Haot describing the privately funded launch as a way to leapfrog competitors before NASA awards Phase 2 of its Commercial LEO Destinations program, a pot worth $1.5 billion across multiple awards according to NASASpaceFlight.com.

Why the slip happened

Vast did not blame any single failed test. The pattern, though, is familiar. Spaceflight Now reported in May 2025 that the company had already moved Haven-1 from August 2025 to May 2026 once before, after determining that an earlier shot was not feasible following primary-structure work.

A second slip of similar size suggests the original 2025 timeline was a stretch goal disguised as a schedule. The company has been candid that vertical integration, where most subsystems including avionics, control moment gyroscopes, cold plates, and ventilation hardware are built in-house, is a cost lever rather than a speed lever. That trade-off shows up here.

The propulsion system is one of the few major components Vast does not build itself. NASASpaceFlight.com confirmed Impulse Space is supplying Haven-1's thrusters, which run on nitrous oxide and ethane and use the company's Saiph engine. Vast tested those Saiph thrusters in its own multi-thruster vacuum stand in late 2025, per its update log.

The Haven-1 SpaceX Falcon 9 stack

Falcon 9 is doing heavy lifting in this program, literally. At roughly 14,000 kg, Haven-1 will set a new mark for the heaviest payload Falcon 9 has flown, according to Wikipedia. That figure matters operationally because it pushes the station to the upper edge of Falcon 9's performance envelope to a 425 km, 51.6-degree orbit, the inclination Vast lists for Haven-1.

SpaceX is also the crew provider. The first expedition, Vast-1, will deliver four astronauts on a Crew Dragon for a stay of up to 30 days, according to the Vast-1 Wikipedia article. The same article notes Vast holds an option for a second crewed flight, Vast-2, and that during the mission the station's propulsion system will rotate Haven-1 to produce a brief period of artificial gravity, a maneuver no commercial station has attempted.

Seven of Vast's leadership team and nine of its engineering leaders are SpaceX alumni, per Spaceflight Now. The personnel overlap is part of why the Falcon 9 and Crew Dragon integration work has moved as quickly as it has.

What Haven-1 will actually do in orbit

The station is a three-year demonstrator, not a permanent outpost. Wikipedia lists a planned three-year orbital lifespan supporting up to four short-duration crews. NASASpaceFlight.com describes the interior layout: zero-G beds, a 1.1-meter domed window, a deployable communal table, and 24/7 Starlink connectivity through laser terminals.

That Starlink integration is a genuine first. Vast describes Haven-1 as the first space station to deploy Starlink, with gigabit speeds delivered through optical inter-satellite links rather than RF ground stations. The ISS, by comparison, still routes most of its high-rate downlink through NASA's TDRSS relays.

The science manifest is small but real. The Haven-1 Lab has 10 mid-deck-style payload slots, each capable of carrying up to 30 kg and drawing up to 100 watts, per Wikipedia. Confirmed payload partners include Redwire, Yuri Gravity, Japan Manned Space Systems Corporation, Interstellar Lab, and Exobiosphere. Five of the ten slots had not been publicly assigned as of Spaceflight Now's April 2025 reporting.

The ISS replacement private station play

Haven-1 is not the product Vast actually wants to sell. It is the credibility document for Haven-2, a multi-module station Vast intends to position as a direct ISS successor.

The scale jump is large. Spaceflight Now reports Haven-2 modules will be nearly five meters longer than Haven-1, carry two windows and two docking ports each, and require Falcon Heavy with an extended fairing rather than Falcon 9. Each module will hold 720 days of crew consumables, against 160 days for Haven-1.

NASASpaceFlight.com details the assembly plan: nine modules total, with a center module so large it requires a SpaceX Starship launch, a first module in orbit by 2028, and full station completion by 2032 supporting up to 12 crew. BBC Science Focus reports Vast intends to add new Haven-2 modules roughly every six months from 2028 onward.

For context, Axiom Space already holds a $140 million NASA contract to attach at least one module to the ISS, with its first standalone Axiom Station launch targeted for late 2026. Vast has no equivalent funded contract yet, which is precisely why a successful Haven-1 flight is leverage rather than a victory lap.

NASA's role and the funded-versus-unfunded question

Vast operates under an unfunded Space Act Agreement with NASA, as the Haven-1 launch listing on Launch Calendar notes. NASA provides technical support and milestone reviews, but no money. That is a meaningful distinction in a program where competitors are receiving direct funding.

The agency has signaled it will pick one or two firms for Phase 2 funding later this year, per Interesting Engineering's reporting. A flight-proven Haven-1, even a small one, would be hard to ignore in that decision. A second slip of the launch date could be.

What to watch next

Three near-term milestones determine whether the Q1 2027 date holds. Environmental testing was originally scheduled for January through March 2026, according to Launch Calendar, with launch-campaign operations at SpaceX's site beginning April 2026. Those windows have moved, but Vast has said integration and environmental tests will conclude in 2026.

Watch for the full-scale Critical Design Review, which Vast's NASA SAA roadmap pegs at January 2027 per Spaceflight Now. Watch for the remaining five payload slots to be filled. And watch NASA's Phase 2 CLD selection announcement, which will determine whether Vast's privately funded sprint actually pays off.

The broader race to replace the ISS is now a four-way contest with very different bets: Axiom is going through the ISS, Voyager and Blue Origin are aiming at clean-sheet stations on slower timelines, and Vast is trying to be first by being smallest. Q1 2027 is the test of that thesis. For more on the companies redrawing low-Earth orbit, browse our Space Tech articles and the latest in News.